C function reference

The purpose of this page is to provide a reference for C library functions. It is based on the man-pages project, and has the following design goals:

Easy to read
Shows all functions along with their descriptions
Allows searching for any function quickly with CTRL+F
Clearly indicates whether the function is a part of ISO C, POSIX, or something else
Links to the appropriate man7.org page in a new tab

How this page was generated:

Open the "man-pages (Linux kernel and C library user-space interface documentation)"-section of man7.org.
Copy the lines with links to man2- and man3-pages to descriptions.html.
Add a base-tag pointing to https://man7.org/linux/man-pages/ in descriptions.html, and serve the current directory.
Download the referenced manpages with wget -rHl1 http://127.0.0.1:5500/descriptions.html and move the man2 and man3-folders next to this file.
Install dependencies with pnpm install and generate this page with pnpm start

ISO STANDARD C

_Exit - terminate the calling process _exit - terminate the calling process exit - terminate the calling process rename - change the name or location of a file renameat - change the name or location of a file renameat2 - change the name or location of a file signal - ANSI C signal handling time - get time in seconds FILE - input/output stream HUGE_VAL - point constants HUGE_VALF - point constants HUGE_VALL - point constants INFINITY - point constants MB_CUR_MAX - maximum length of a multibyte character in the current locale MB_LEN_MAX - maximum multibyte length of a character across all locales NAN - point constants _Generic - generic selection _Static_assert - fail compilation if assertion is false abort - cause abnormal process termination abs - compute the absolute value of an integer acos - arc cosine function acosf - arc cosine function acosh - inverse hyperbolic cosine function acoshf - inverse hyperbolic cosine function acoshl - inverse hyperbolic cosine function acosl - arc cosine function aligned_alloc - allocate aligned memory asctime - down time or ASCII asctime_r - down time or ASCII asin - arc sine function asinf - arc sine function asinh - inverse hyperbolic sine function asinhf - inverse hyperbolic sine function asinhl - inverse hyperbolic sine function asinl - arc sine function assert - abort the program if assertion is false atan - arc tangent function atan2 - arc tangent function of two variables atan2f - arc tangent function of two variables atan2l - arc tangent function of two variables atanf - arc tangent function atanh - inverse hyperbolic tangent function atanhf - inverse hyperbolic tangent function atanhl - inverse hyperbolic tangent function atanl - arc tangent function atexit - register a function to be called at normal process termination atof - convert a string to a double atoi - convert a string to an integer atol - convert a string to an integer atoll - convert a string to an integer atoq - convert a string to an integer bsearch - binary search of a sorted array btowc - convert single byte to wide character cabs - absolute value of a complex number cabsf - absolute value of a complex number cabsl - absolute value of a complex number cacos - complex arc cosine cacosf - complex arc cosine cacosh - complex arc hyperbolic cosine cacoshf - complex arc hyperbolic cosine cacoshl - complex arc hyperbolic cosine cacosl - complex arc cosine calloc - allocate and free dynamic memory carg - calculate the complex argument cargf - calculate the complex argument cargl - calculate the complex argument casin - complex arc sine casinf - complex arc sine casinh - complex arc sine hyperbolic casinhf - complex arc sine hyperbolic casinhl - complex arc sine hyperbolic casinl - complex arc sine catan - complex arc tangents catanf - complex arc tangents catanh - complex arc tangents hyperbolic catanhf - complex arc tangents hyperbolic catanhl - complex arc tangents hyperbolic catanl - complex arc tangents cbrt - cube root function cbrtf - cube root function cbrtl - cube root function ccos - complex cosine function ccosf - complex cosine function ccosh - complex hyperbolic cosine ccoshf - complex hyperbolic cosine ccoshl - complex hyperbolic cosine ccosl - complex cosine function ceil - ceiling function: smallest integral value not less than argument ceilf - ceiling function: smallest integral value not less than argument ceill - ceiling function: smallest integral value not less than argument cexp - complex exponential function cexp2 - 2 exponent of a complex number cexp2f - 2 exponent of a complex number cexp2l - 2 exponent of a complex number cexpf - complex exponential function cexpl - complex exponential function cimag - get imaginary part of a complex number cimagf - get imaginary part of a complex number cimagl - get imaginary part of a complex number clearerr - check and reset stream status clock - determine processor time clock_t - system time clog - natural logarithm of a complex number clogf - natural logarithm of a complex number clogl - natural logarithm of a complex number conj - calculate the complex conjugate conjf - calculate the complex conjugate conjl - calculate the complex conjugate copysign - copy sign of a number copysignf - copy sign of a number copysignl - copy sign of a number cos - cosine function cosf - cosine function cosh - hyperbolic cosine function coshf - hyperbolic cosine function coshl - hyperbolic cosine function cosl - cosine function cpow - complex power function cpowf - complex power function cpowl - complex power function cproj - project into Riemann Sphere cprojf - project into Riemann Sphere cprojl - project into Riemann Sphere creal - get real part of a complex number crealf - get real part of a complex number creall - get real part of a complex number csin - complex sine function csinf - complex sine function csinh - complex hyperbolic sine csinhf - complex hyperbolic sine csinhl - complex hyperbolic sine csinl - complex sine function csqrt - complex square root csqrtf - complex square root csqrtl - complex square root ctan - complex tangent function ctanf - complex tangent function ctanh - complex hyperbolic tangent ctanhf - complex hyperbolic tangent ctanhl - complex hyperbolic tangent ctanl - complex tangent function ctime - down time or ASCII ctime_r - down time or ASCII difftime - calculate time difference div - compute quotient and remainder of an integer division div_t - quotient and remainder of an integer division double_t - most efficient floating types dprintf - formatted output conversion drem - point remainder function dremf - point remainder function dreml - point remainder function erf - error function erfc - complementary error function erfcf - complementary error function erfcl - complementary error function erff - error function erfl - error function exit - cause normal process termination exp - e exponential function exp2 - 2 exponential function exp2f - 2 exponential function exp2l - 2 exponential function expf - e exponential function expl - e exponential function expm1 - exponential minus 1 expm1f - exponential minus 1 expm1l - exponential minus 1 fabs - point number fabsf - point number fabsl - point number fclose - close a stream fdim - positive difference fdimf - positive difference fdiml - positive difference fdopen - stream open functions feclearexcept - point rounding and exception handling fedisableexcept - point rounding and exception handling feenableexcept - point rounding and exception handling fegetenv - point rounding and exception handling fegetexcept - point rounding and exception handling fegetexceptflag - point rounding and exception handling fegetround - point rounding and exception handling feholdexcept - point rounding and exception handling fenv - point rounding and exception handling fenv_t - point environment feof - check and reset stream status feraiseexcept - point rounding and exception handling ferror - check and reset stream status fesetenv - point rounding and exception handling fesetexceptflag - point rounding and exception handling fesetround - point rounding and exception handling fetestexcept - point rounding and exception handling feupdateenv - point rounding and exception handling fexcept_t - point environment fflush - flush a stream fgetc - input of characters and strings fgetpos - reposition a stream fgets - input of characters and strings fgetwc - read a wide character from a FILE stream fgetws - character string from a FILE stream float_t - most efficient floating types floor - largest integral value not greater than argument floorf - largest integral value not greater than argument floorl - largest integral value not greater than argument fma - point multiply and add fmaf - point multiply and add fmal - point multiply and add fmax - point numbers fmaxf - point numbers fmaxl - point numbers fmin - point numbers fminf - point numbers fminl - point numbers fmod - point remainder function fmodf - point remainder function fmodl - point remainder function fopen - stream open functions fpclassify - point classification macros fprintf - formatted output conversion fputc - output of characters and strings fputs - output of characters and strings fputwc - write a wide character to a FILE stream fputws - character string to a FILE stream fread - binary stream input/output free - allocate and free dynamic memory freopen - stream open functions frexp - point number to fractional and integral components frexpf - point number to fractional and integral components frexpl - point number to fractional and integral components fscanf - input FILE format conversion fseek - reposition a stream fsetpos - reposition a stream ftell - reposition a stream fwide - set and determine the orientation of a FILE stream fwprintf - character output conversion fwrite - binary stream input/output getc - input of characters and strings getchar - input of characters and strings getenv - get an environment variable getwc - read a wide character from a FILE stream getwchar - read a wide character from standard input gmtime - down time or ASCII gmtime_r - down time or ASCII hypot - Euclidean distance function hypotf - Euclidean distance function hypotl - Euclidean distance function ilogb - point value ilogbf - point value ilogbl - point value imaxabs - compute the absolute value of an integer imaxdiv - compute quotient and remainder of an integer division imaxdiv_t - quotient and remainder of an integer division int16_t - width basic integer types int32_t - width basic integer types int64_t - width basic integer types int8_t - width basic integer types intN_t - width basic integer types intmax_t - width basic integer types intptr_t - integer types wide enough to hold pointers isalnum - character classification functions isalnum_l - character classification functions isalpha - character classification functions isalpha_l - character classification functions isascii - character classification functions isascii_l - character classification functions isblank - character classification functions isblank_l - character classification functions iscntrl - character classification functions iscntrl_l - character classification functions isdigit - character classification functions isdigit_l - character classification functions isfinite - point classification macros isgraph - character classification functions isgraph_l - character classification functions isgreater - point relational tests without exception for NaN isgreaterequal - point relational tests without exception for NaN isinf - point classification macros isless - point relational tests without exception for NaN islessequal - point relational tests without exception for NaN islessgreater - point relational tests without exception for NaN islower - character classification functions islower_l - character classification functions isnan - point classification macros isnormal - point classification macros isprint - character classification functions isprint_l - character classification functions ispunct - character classification functions ispunct_l - character classification functions isspace - character classification functions isspace_l - character classification functions isunordered - point relational tests without exception for NaN isupper - character classification functions isupper_l - character classification functions iswalnum - test for alphanumeric wide character iswalpha - test for alphabetic wide character iswcntrl - test for control wide character iswctype - character classification iswdigit - test for decimal digit wide character iswgraph - test for graphic wide character iswlower - test for lowercase wide character iswprint - test for printing wide character iswpunct - test for punctuation or symbolic wide character iswspace - test for whitespace wide character iswupper - test for uppercase wide character iswxdigit - test for hexadecimal digit wide character isxdigit - character classification functions isxdigit_l - character classification functions labs - compute the absolute value of an integer lconv - numeric formatting information ldexp - point number by integral power of 2 ldexpf - point number by integral power of 2 ldexpl - point number by integral power of 2 ldiv - compute quotient and remainder of an integer division ldiv_t - quotient and remainder of an integer division lgamma - log gamma function lgamma_r - log gamma function lgammaf - log gamma function lgammaf_r - log gamma function lgammal - log gamma function lgammal_r - log gamma function llabs - compute the absolute value of an integer lldiv - compute quotient and remainder of an integer division lldiv_t - quotient and remainder of an integer division llrint - round to nearest integer llrintf - round to nearest integer llrintl - round to nearest integer llround - round to nearest integer llroundf - round to nearest integer llroundl - round to nearest integer localeconv - get numeric formatting information localtime - down time or ASCII localtime_r - down time or ASCII log - natural logarithmic function log10 - 10 logarithmic function log10f - 10 logarithmic function log10l - 10 logarithmic function log1p - logarithm of 1 plus argument log1pf - logarithm of 1 plus argument log1pl - logarithm of 1 plus argument log2 - 2 logarithmic function log2f - 2 logarithmic function log2l - 2 logarithmic function logb - point value logbf - point value logbl - point value logf - natural logarithmic function logl - natural logarithmic function longjmp - performing a nonlocal goto lrint - round to nearest integer lrintf - round to nearest integer lrintl - round to nearest integer lround - round to nearest integer lroundf - round to nearest integer lroundl - round to nearest integer malloc - allocate and free dynamic memory mblen - determine number of bytes in next multibyte character mbrlen - determine number of bytes in next multibyte character mbrtowc - convert a multibyte sequence to a wide character mbsinit - test for initial shift state mbsrtowcs - character string mbstowcs - character string mbtowc - convert a multibyte sequence to a wide character memalign - allocate aligned memory memchr - scan memory for a character memcmp - compare memory areas memcpy - copy memory area memmove - copy memory area memrchr - scan memory for a character memset - fill memory with a constant byte mktime - down time or ASCII modf - point number modff - point number modfl - point number nan - return 'Not a Number'nanf - return 'Not a Number'nanl - return 'Not a Number'nearbyint - round to nearest integer nearbyintf - round to nearest integer nearbyintl - round to nearest integer nextafter - point number manipulation nextafterf - point number manipulation nextafterl - point number manipulation nexttoward - point number manipulation nexttowardf - point number manipulation nexttowardl - point number manipulation offsetof - offset of a structure member perror - print a system error message posix_memalign - allocate aligned memory pow - power functions powf - power functions powl - power functions printf - formatted output conversion ptrdiff_t - count of elements or array index putc - output of characters and strings putchar - output of characters and strings puts - output of characters and strings putwc - write a wide character to a FILE stream putwchar - write a wide character to standard output pvalloc - allocate aligned memory qsort - sort an array qsort_r - sort an array raise - send a signal to the caller rand - random number generator rand_r - random number generator rawmemchr - scan memory for a character realloc - allocate and free dynamic memory reallocarray - allocate and free dynamic memory remainder - point remainder function remainderf - point remainder function remainderl - point remainder function remove - remove a file or directory remquo - remainder and part of quotient remquof - remainder and part of quotient remquol - remainder and part of quotient rewind - reposition a stream rint - round to nearest integer rintf - round to nearest integer rintl - round to nearest integer round - round to nearest integer, away from zero roundf - round to nearest integer, away from zero roundl - round to nearest integer, away from zero scalbln - point number by integral power of radix scalblnf - point number by integral power of radix scalblnl - point number by integral power of radix scalbn - point number by integral power of radix scalbnf - point number by integral power of radix scalbnl - point number by integral power of radix scanf - input FILE format conversion secure_getenv - get an environment variable setbuf - stream buffering operations setbuffer - stream buffering operations setjmp - performing a nonlocal goto setlinebuf - stream buffering operations setlocale - set the current locale setvbuf - stream buffering operations siglongjmp - performing a nonlocal goto signbit - point number signgam - log gamma function sigsetjmp - performing a nonlocal goto sin - sine function sinf - sine function sinh - hyperbolic sine function sinhf - hyperbolic sine function sinhl - hyperbolic sine function sinl - sine function size_t - count of bytes snprintf - formatted output conversion sprintf - formatted output conversion sqrt - square root function sqrtf - square root function sqrtl - square root function srand - random number generator sscanf - input string format conversion ssize_t - count of bytes static_assert - fail compilation if assertion is false stdarg - variable argument lists stderr - standard I/O streams stdin - standard I/O streams stdio - standard input/output library functions stdout - standard I/O streams stpcpy - copy or catenate a string stpncpy - width buffer and copy a string into a character sequence with truncation and zero the rest of it strcasestr - locate a substring strcat - copy or catenate a string strchr - locate character in string strchrnul - locate character in string strcmp - compare two strings strcoll - compare two strings using the current locale strcpy - copy or catenate a string strcspn - get length of a prefix substring strerror - return string describing error number strerror_l - return string describing error number strerror_r - return string describing error number strerrordesc_np - return string describing error number strerrorname_np - return string describing error number strftime - format date and time strftime_l - format date and time strlen - calculate the length of a string strncat - padded character sequence into a string strncmp - compare two strings strncpy - width buffer and copy a string into a character sequence with truncation and zero the rest of it strpbrk - search a string for any of a set of bytes strrchr - locate character in string strspn - get length of a prefix substring strstr - locate a substring strtod - point number strtof - point number strtoimax - convert string to integer strtok - extract tokens from strings strtok_r - extract tokens from strings strtol - convert a string to a long integer strtold - point number strtoll - convert a string to a long integer strtoq - convert a string to a long integer strtoul - convert a string to an unsigned long integer strtoull - convert a string to an unsigned long integer strtoumax - convert string to integer strtouq - convert a string to an unsigned long integer strxfrm - string transformation suseconds_t - integer time swprintf - character output conversion sys_errlist - print a system error message sys_nerr - print a system error message system - execute a shell command tan - tangent function tanf - tangent function tanh - hyperbolic tangent function tanhf - hyperbolic tangent function tanhl - hyperbolic tangent function tanl - tangent function tgamma - true gamma function tgammaf - true gamma function tgammal - true gamma function time_t - integer time timespec - time in seconds and nanoseconds tm - down time tmpfile - create a temporary file tmpnam - create a name for a temporary file tmpnam_r - create a name for a temporary file tolower - convert uppercase or lowercase tolower_l - convert uppercase or lowercase toupper - convert uppercase or lowercase toupper_l - convert uppercase or lowercase towctrans - character transliteration towlower - convert a wide character to lowercase towlower_l - convert a wide character to lowercase towupper - convert a wide character to uppercase towupper_l - convert a wide character to uppercase trunc - round to integer, toward zero truncf - round to integer, toward zero truncl - round to integer, toward zero uint16_t - width basic integer types uint32_t - width basic integer types uint64_t - width basic integer types uint8_t - width basic integer types uintN_t - width basic integer types uintmax_t - width basic integer types uintptr_t - integer types wide enough to hold pointers ungetc - input of characters and strings ungetwc - push back a wide character onto a FILE stream useconds_t - integer time va_arg - variable argument lists va_copy - variable argument lists va_end - variable argument lists va_list - variable argument list va_start - variable argument lists valloc - allocate aligned memory vdprintf - formatted output conversion vfprintf - formatted output conversion vfscanf - input FILE format conversion vfwprintf - character output conversion void - abstract type vprintf - formatted output conversion vscanf - input FILE format conversion vsnprintf - formatted output conversion vsprintf - formatted output conversion vsscanf - input string format conversion vswprintf - character output conversion vwprintf - character output conversion wcrtomb - convert a wide character to a multibyte sequence wcscat - character strings wcschr - character string wcscmp - character strings wcscpy - character string wcscspn - character string for any of a set of wide characters wcslen - character string wcsncat - character strings wcsncmp - character strings wcsncpy - size string of wide characters wcspbrk - character string for any of a set of wide characters wcsrchr - character string wcsrtombs - character string to a multibyte string wcsspn - character substring wcsstr - character string wcstoimax - character string to integer wcstok - character string into tokens wcstombs - character string to a multibyte string wcstoumax - character string to integer wctob - try to represent a wide character as a single byte wctomb - convert a wide character to a multibyte sequence wctrans - character translation mapping wctype - character classification wmemchr - character array wmemcmp - characters wmemcpy - characters wmemmove - characters wmemset - characters with a constant wide character wprintf - character output conversion

POSIX

_newselect - synchronous I/O multiplexing accept - accept a connection on a socket accept4 - accept a connection on a socket access - check user's permissions for a file alarm - set an alarm clock for delivery of a signal arm_fadvise - predeclare an access pattern for file data arm_fadvise64_64 - predeclare an access pattern for file data bind - bind a name to a socket chdir - change working directory chmod - change permissions of a file chown - change ownership of a file chown32 - change ownership of a file clock_getres - clock and time functions clock_gettime - clock and time functions clock_nanosleep - resolution sleep with specifiable clock clock_settime - clock and time functions close - close a file descriptor connect - initiate a connection on a socket creat - open and possibly create a file dup - duplicate a file descriptor dup2 - duplicate a file descriptor dup3 - duplicate a file descriptor execve - execute program faccessat - check user's permissions for a file faccessat2 - check user's permissions for a file fadvise64 - predeclare an access pattern for file data fadvise64_64 - predeclare an access pattern for file data fchdir - change working directory fchmod - change permissions of a file fchmodat - change permissions of a file fchown - change ownership of a file fchown32 - change ownership of a file fchownat - change ownership of a file fcntl - manipulate file descriptor fcntl64 - manipulate file descriptor fdatasync - core state with storage device fork - create a child process fstat - get file status fstat64 - get file status fstatat - get file status fstatat64 - get file status fsync - core state with storage device ftruncate - truncate a file to a specified length ftruncate64 - truncate a file to a specified length getcwd - get current working directory getegid - get group identity getegid32 - get group identity geteuid - get user identity geteuid32 - get user identity getgid - get group identity getgid32 - get group identity getgroups - get/set list of supplementary group IDs getgroups32 - get/set list of supplementary group IDs gethostname - get/set hostname getitimer - get or set value of an interval timer getpeername - get name of connected peer socket getpgid - set/get process group getpgrp - set/get process group getpid - get process identification getppid - get process identification getpriority - get/set program scheduling priority getrlimit - get/set resource limits getrusage - get resource usage getsid - get session ID getsockname - get socket name getsockopt - get and set options on sockets gettimeofday - get / set time getuid - get user identity getuid32 - get user identity kill - send signal to a process lchown - change ownership of a file lchown32 - change ownership of a file link - make a new name for a file linkat - make a new name for a file listen - listen for connections on a socket lseek - reposition read/write file offset lstat - get file status lstat64 - get file status mkdir - create a directory mkdirat - create a directory mknod - create a special or ordinary file mknodat - create a special or ordinary file mlock - lock and unlock memory mlock2 - lock and unlock memory mlockall - lock and unlock memory mmap - map or unmap files or devices into memory mprotect - set protection on a region of memory mq_notify - register for notification when a message is available mq_open - open a message queue mq_timedreceive - receive a message from a message queue mq_timedsend - send a message to a message queue mq_unlink - remove a message queue msgctl - System V message control operations msgget - get a System V message queue identifier msgop - System V message queue operations msgrcv - System V message queue operations msgsnd - System V message queue operations msync - synchronize a file with a memory map munlock - lock and unlock memory munlockall - lock and unlock memory munmap - map or unmap files or devices into memory nanosleep - resolution sleep newfstatat - get file status nice - change process priority oldfstat - get file status oldlstat - get file status oldolduname - get name and information about current kernel oldstat - get file status olduname - get name and information about current kernel open - open and possibly create a file openat - open and possibly create a file pause - wait for signal pipe - create pipe pipe2 - create pipe pkey_mprotect - set protection on a region of memory poll - wait for some event on a file descriptor posix_fadvise - predeclare an access pattern for file data ppoll - wait for some event on a file descriptor pread - read from or write to a file descriptor at a given offset pread64 - read from or write to a file descriptor at a given offset preadv - read or write data into multiple buffers preadv2 - read or write data into multiple buffers prlimit - get/set resource limits prlimit64 - get/set resource limits pselect - synchronous I/O multiplexing pselect6 - synchronous I/O multiplexing pwrite - read from or write to a file descriptor at a given offset pwrite64 - read from or write to a file descriptor at a given offset pwritev - read or write data into multiple buffers pwritev2 - read or write data into multiple buffers read - read from a file descriptor readlink - read value of a symbolic link readlinkat - read value of a symbolic link readv - read or write data into multiple buffers recv - receive a message from a socket recvfrom - receive a message from a socket recvmsg - receive a message from a socket rmdir - delete a directory rt_sigaction - examine and change a signal action rt_sigpending - examine pending signals rt_sigprocmask - examine and change blocked signals rt_sigsuspend - wait for a signal rt_sigtimedwait - synchronously wait for queued signals sched_get_priority_max - get static priority range sched_get_priority_min - get static priority range sched_getparam - set and get scheduling parameters sched_getscheduler - set and get scheduling policy/parameters sched_rr_get_interval - get the SCHED_RR interval for the named process sched_setparam - set and get scheduling parameters sched_setscheduler - set and get scheduling policy/parameters sched_yield - yield the processor select - synchronous I/O multiplexing semctl - System V semaphore control operations semget - get a System V semaphore set identifier semop - System V semaphore operations semtimedop - System V semaphore operations send - send a message on a socket sendmsg - send a message on a socket sendto - send a message on a socket setegid - set effective user or group ID seteuid - set effective user or group ID setgid - set group identity setgid32 - set group identity setgroups - get/set list of supplementary group IDs setgroups32 - get/set list of supplementary group IDs sethostname - get/set hostname setitimer - get or set value of an interval timer setpgid - set/get process group setpgrp - set/get process group setpriority - get/set program scheduling priority setregid - set real and/or effective user or group ID setregid32 - set real and/or effective user or group ID setreuid - set real and/or effective user or group ID setreuid32 - set real and/or effective user or group ID setrlimit - get/set resource limits setsid - creates a session and sets the process group ID setsockopt - get and set options on sockets settimeofday - get / set time setuid - set user identity setuid32 - set user identity shmat - System V shared memory operations shmctl - System V shared memory control shmdt - System V shared memory operations shmget - allocates a System V shared memory segment shmop - System V shared memory operations shutdown - duplex connection sigaction - examine and change a signal action sigaltstack - set and/or get signal stack context sigpending - examine pending signals sigprocmask - examine and change blocked signals sigsuspend - wait for a signal sigtimedwait - synchronously wait for queued signals sigwaitinfo - synchronously wait for queued signals socket - create an endpoint for communication socketpair - create a pair of connected sockets stat - get file status stat64 - get file status symlink - make a new name for a file symlinkat - make a new name for a file sync - commit filesystem caches to disk syncfs - commit filesystem caches to disk timer_create - process timer timer_delete - process timer timer_getoverrun - process timer timer_gettime - process timer timer_settime - process timer times - get process times truncate - truncate a file to a specified length truncate64 - truncate a file to a specified length ugetrlimit - get/set resource limits umask - set file mode creation mask uname - get name and information about current kernel unlink - delete a name and possibly the file it refers to unlinkat - delete a name and possibly the file it refers to utime - change file last access and modification times utimensat - change file timestamps with nanosecond precision utimes - change file last access and modification times wait - wait for process to change state waitid - wait for process to change state waitpid - wait for process to change state write - write to a file descriptor writev - read or write data into multiple buffers CMSG_ALIGN - access ancillary data CMSG_DATA - access ancillary data CMSG_FIRSTHDR - access ancillary data CMSG_LEN - access ancillary data CMSG_NXTHDR - access ancillary data CMSG_SPACE - access ancillary data FD_CLR - synchronous I/O multiplexing FD_ISSET - synchronous I/O multiplexing FD_SET - synchronous I/O multiplexing FD_ZERO - synchronous I/O multiplexing a64l - 64 aio_cancel - cancel an outstanding asynchronous I/O request aio_error - get error status of asynchronous I/O operation aio_fsync - asynchronous file synchronization aio_read - asynchronous read aio_return - get return status of asynchronous I/O operation aio_suspend - wait for asynchronous I/O operation or timeout aio_write - asynchronous write aiocb - asynchronous I/O control block alphasort - scan a directory for matching entries basename - parse pathname components blkcnt_t - file block counts blksize_t - file block sizes byteorder - convert values between host and network byte order catclose - open/close a message catalog catgets - get message from a message catalog catopen - open/close a message catalog cc_t - terminal special characters, baud rates, modes cfgetispeed - get and set terminal attributes, line control, get and set baud rate cfgetospeed - get and set terminal attributes, line control, get and set baud rate cfmakeraw - get and set terminal attributes, line control, get and set baud rate cfsetispeed - get and set terminal attributes, line control, get and set baud rate cfsetospeed - get and set terminal attributes, line control, get and set baud rate cfsetspeed - get and set terminal attributes, line control, get and set baud rate clearenv - clear the environment clearerr_unlocked - nonlocking stdio functions clock_getcpuclockid - time clock clockid_t - clock ID for the clock and timer functions closedir - close a directory closelog - send messages to the system logger cmsg - access ancillary data confstr - get configuration dependent string variables crypt - password and data encryption crypt_r - password and data encryption ctermid - get controlling terminal name cuserid - get username daylight - initialize time conversion information dev_t - device ID dirfd - get directory stream file descriptor dirname - parse pathname components dlclose - open and close a shared object dlerror - obtain error diagnostic for functions in the dlopen API dlmopen - open and close a shared object dlopen - open and close a shared object dlsym - obtain address of a symbol in a shared object or executable dlvsym - obtain address of a symbol in a shared object or executable drand48 - random numbers duplocale - duplicate a locale object encrypt - bit messages encrypt_r - bit messages endgrent - get group file entry endhostent - get network host entry endnetent - get network entry endprotoent - get protocol entry endpwent - get password file entry endservent - get service entry erand48 - random numbers exec - execute a file execl - execute a file execle - execute a file execlp - execute a file execv - execute a file execvp - execute a file execvpe - execute a file fdopendir - open a directory feof_unlocked - nonlocking stdio functions ferror_unlocked - nonlocking stdio functions fexecve - execute program specified via file descriptor fflush_unlocked - nonlocking stdio functions ffs - find first bit set in a word ffsl - find first bit set in a word ffsll - find first bit set in a word fgetc_unlocked - nonlocking stdio functions fgets_unlocked - nonlocking stdio functions fgetwc_unlocked - nonlocking stdio functions fgetws_unlocked - nonlocking stdio functions fileno - obtain file descriptor of a stdio stream fileno_unlocked - nonlocking stdio functions flockfile - lock FILE for stdio fmemopen - open memory as stream fmtmsg - print formatted error messages fnmatch - match filename or pathname fpathconf - get configuration values for files fputc_unlocked - nonlocking stdio functions fputs_unlocked - nonlocking stdio functions fputwc_unlocked - nonlocking stdio functions fputws_unlocked - nonlocking stdio functions fread_unlocked - nonlocking stdio functions freeaddrinfo - network address and service translation freelocale - create, modify, and free a locale object fseeko - seek to or report file position fstatvfs - get filesystem statistics ftello - seek to or report file position ftok - convert a pathname and a project identifier to a System V IPC key ftrylockfile - lock FILE for stdio ftw - file tree walk funlockfile - lock FILE for stdio futimens - change file timestamps with nanosecond precision fwrite_unlocked - nonlocking stdio functions gai_strerror - network address and service translation get_current_dir_name - get current working directory getaddrinfo - network address and service translation getc_unlocked - nonlocking stdio functions getchar_unlocked - nonlocking stdio functions getcwd - get current working directory getdate - down time getdate_err - down time getdate_r - down time getdelim - delimited string input getgrent - get group file entry getgrgid - get group file entry getgrgid_r - get group file entry getgrnam - get group file entry getgrnam_r - get group file entry gethostbyaddr - get network host entry gethostbyaddr_r - get network host entry gethostbyname - get network host entry gethostbyname2 - get network host entry gethostbyname2_r - get network host entry gethostbyname_r - get network host entry gethostent - get network host entry gethostent_r - get network host entry gethostid - get or set the unique identifier of the current host getline - delimited string input getlogin - get username getlogin_r - get username getnameinfo - independent manner getnetbyaddr - get network entry getnetbyname - get network entry getnetent - get network entry getopt - line options getopt_long - line options getopt_long_only - line options getprotobyname - get protocol entry getprotobynumber - get protocol entry getprotoent - get protocol entry getpwent - get password file entry getpwnam - get password file entry getpwnam_r - get password file entry getpwuid - get password file entry getpwuid_r - get password file entry gets - get a string from standard input (DEPRECATED)getservbyname - get service entry getservbyport - get service entry getservent - get service entry getsubopt - parse suboption arguments from a string getwc_unlocked - nonlocking stdio functions getwchar_unlocked - nonlocking stdio functions getwd - get current working directory gid_t - process/user/group identifier glob - find pathnames matching a pattern, free memory from glob()globfree - find pathnames matching a pattern, free memory from glob()grantpt - grant access to the slave pseudoterminal h_errno - get network host entry hcreate - hash table management hcreate_r - hash table management hdestroy - hash table management hdestroy_r - hash table management herror - get network host entry hsearch - hash table management hsearch_r - hash table management hstrerror - get network host entry htonl - convert values between host and network byte order htons - convert values between host and network byte order iconv - perform character set conversion iconv_close - deallocate descriptor for character set conversion iconv_open - allocate descriptor for character set conversion id_t - process/user/group identifier if_freenameindex - get network interface names and indexes if_indextoname - mappings between network interface names and indexes if_nameindex - get network interface names and indexes if_nametoindex - mappings between network interface names and indexes in6_addr - socket address in_addr - socket address in_addr_t - socket address in_port_t - socket address inet - Internet address manipulation routines inet_addr - Internet address manipulation routines inet_aton - Internet address manipulation routines inet_lnaof - Internet address manipulation routines inet_makeaddr - Internet address manipulation routines inet_netof - Internet address manipulation routines inet_network - Internet address manipulation routines inet_ntoa - Internet address manipulation routines inet_ntop - convert IPv4 and IPv6 addresses from binary to text form inet_pton - convert IPv4 and IPv6 addresses from text to binary form initstate - random number generator insque - insert/remove an item from a queue iovec - Vector I/O data structure isatty - test whether a file descriptor refers to a terminal iswblank - test for whitespace wide character j0 - Bessel functions of the first kind j0f - Bessel functions of the first kind j0l - Bessel functions of the first kind j1 - Bessel functions of the first kind j1f - Bessel functions of the first kind j1l - Bessel functions of the first kind jn - Bessel functions of the first kind jnf - Bessel functions of the first kind jnl - Bessel functions of the first kind jrand48 - random numbers killpg - send signal to a process group l64a - 64 lcong48 - random numbers lfind - linear search of an array lio_listio - initiate a list of I/O requests lockf - apply, test or remove a POSIX lock on an open file loff_t - file sizes lrand48 - random numbers lsearch - linear search of an array mbsnrtowcs - character string memccpy - copy memory area mkdtemp - create a unique temporary directory mkfifo - make a FIFO special file (a named pipe)mkfifoat - make a FIFO special file (a named pipe)mkostemp - create a unique temporary file mkostemps - create a unique temporary file mkstemp - create a unique temporary file mkstemps - create a unique temporary file mmap64 - map or unmap files or devices into memory mode_t - file attributes mq_close - close a message queue descriptor mq_getattr - get/set message queue attributes mq_notify - register for notification when a message is available mq_open - open a message queue mq_receive - receive a message from a message queue mq_send - send a message to a message queue mq_setattr - get/set message queue attributes mq_timedreceive - receive a message from a message queue mq_timedsend - send a message to a message queue mq_unlink - remove a message queue mrand48 - random numbers newlocale - create, modify, and free a locale object nftw - file tree walk nl_langinfo - query language and locale information nl_langinfo_l - query language and locale information nrand48 - random numbers ntohl - convert values between host and network byte order ntohs - convert values between host and network byte order off64_t - file sizes off_t - file sizes open_memstream - open a dynamic memory buffer stream open_wmemstream - open a dynamic memory buffer stream opendir - open a directory openlog - send messages to the system logger optarg - line options opterr - line options optind - line options optopt - line options pathconf - get configuration values for files pclose - pipe stream to or from a process pid_t - process/user/group identifier popen - pipe stream to or from a process posix_fallocate - allocate file space posix_madvise - give advice about patterns of memory usage posix_openpt - open a pseudoterminal device posix_spawn - spawn a process posix_spawnp - spawn a process psiginfo - print signal description psignal - print signal description pthread_atfork - register fork handlers pthread_attr_destroy - initialize and destroy thread attributes object pthread_attr_getdetachstate - set/get detach state attribute in thread attributes object pthread_attr_getguardsize - set/get guard size attribute in thread attributes object pthread_attr_getinheritsched - scheduler attribute in thread attributes object pthread_attr_getschedparam - set/get scheduling parameter attributes in thread attributes object pthread_attr_getschedpolicy - set/get scheduling policy attribute in thread attributes object pthread_attr_getscope - set/get contention scope attribute in thread attributes object pthread_attr_getstack - set/get stack attributes in thread attributes object pthread_attr_getstacksize - set/get stack size attribute in thread attributes object pthread_attr_init - initialize and destroy thread attributes object pthread_attr_setdetachstate - set/get detach state attribute in thread attributes object pthread_attr_setguardsize - set/get guard size attribute in thread attributes object pthread_attr_setinheritsched - scheduler attribute in thread attributes object pthread_attr_setschedparam - set/get scheduling parameter attributes in thread attributes object pthread_attr_setschedpolicy - set/get scheduling policy attribute in thread attributes object pthread_attr_setscope - set/get contention scope attribute in thread attributes object pthread_attr_setstack - set/get stack attributes in thread attributes object pthread_attr_setstacksize - set/get stack size attribute in thread attributes object pthread_cancel - send a cancelation request to a thread pthread_cleanup_pop - up handlers pthread_cleanup_push - up handlers pthread_create - create a new thread pthread_detach - detach a thread pthread_equal - compare thread IDs pthread_exit - terminate calling thread pthread_getconcurrency - set/get the concurrency level pthread_getcpuclockid - retrieve ID of a thread's CPU time clock pthread_getschedparam - set/get scheduling policy and parameters of a thread pthread_join - join with a terminated thread pthread_kill - send a signal to a thread pthread_mutex_consistent - make a robust mutex consistent pthread_mutex_consistent_np - make a robust mutex consistent pthread_mutexattr_destroy - initialize and destroy a mutex attributes object pthread_mutexattr_getpshared - shared mutex attribute pthread_mutexattr_getrobust - get and set the robustness attribute of a mutex attributes object pthread_mutexattr_getrobust_np - get and set the robustness attribute of a mutex attributes object pthread_mutexattr_init - initialize and destroy a mutex attributes object pthread_mutexattr_setpshared - shared mutex attribute pthread_mutexattr_setrobust - get and set the robustness attribute of a mutex attributes object pthread_mutexattr_setrobust_np - get and set the robustness attribute of a mutex attributes object pthread_self - obtain ID of the calling thread pthread_setcancelstate - set cancelability state and type pthread_setcanceltype - set cancelability state and type pthread_setconcurrency - set/get the concurrency level pthread_setschedparam - set/get scheduling policy and parameters of a thread pthread_setschedprio - set scheduling priority of a thread pthread_sigmask - examine and change mask of blocked signals pthread_spin_destroy - initialize or destroy a spin lock pthread_spin_init - initialize or destroy a spin lock pthread_spin_lock - lock and unlock a spin lock pthread_spin_trylock - lock and unlock a spin lock pthread_spin_unlock - lock and unlock a spin lock pthread_testcancel - request delivery of any pending cancelation request ptsname - get the name of the slave pseudoterminal ptsname_r - get the name of the slave pseudoterminal putc_unlocked - nonlocking stdio functions putchar_unlocked - nonlocking stdio functions putenv - change or add an environment variable putwc_unlocked - nonlocking stdio functions putwchar_unlocked - nonlocking stdio functions random - random number generator readdir - read a directory readdir_r - read a directory realpath - return the canonicalized absolute pathname regcomp - POSIX regex functions regerror - POSIX regex functions regex - POSIX regex functions regex_t - regular expression matching regexec - POSIX regex functions regfree - POSIX regex functions regmatch_t - regular expression matching regoff_t - regular expression matching remque - insert/remove an item from a queue rewinddir - reset directory stream sa_family_t - socket address scandir - scan a directory for matching entries scandirat - scan a directory for matching entries seed48 - random numbers seekdir - set the position of the next readdir() call in the directory stream.sem_close - close a named semaphore sem_destroy - destroy an unnamed semaphore sem_getvalue - get the value of a semaphore sem_init - initialize an unnamed semaphore sem_open - initialize and open a named semaphore sem_post - unlock a semaphore sem_timedwait - lock a semaphore sem_trywait - lock a semaphore sem_unlink - remove a named semaphore sem_wait - lock a semaphore setenv - change or add an environment variable setgrent - get group file entry sethostent - get network host entry sethostid - get or set the unique identifier of the current host setkey - bit messages setkey_r - bit messages setlogmask - set log priority mask setnetent - get network entry setprotoent - get protocol entry setpwent - get password file entry setservent - get service entry setstate - random number generator shm_open - create/open or unlink POSIX shared memory objects shm_unlink - create/open or unlink POSIX shared memory objects sigabbrev_np - return string describing signal sigaddset - POSIX signal set operations sigandset - POSIX signal set operations sigdelset - POSIX signal set operations sigdescr_np - return string describing signal sigemptyset - POSIX signal set operations sigfillset - POSIX signal set operations sighold - System V signal API sigignore - System V signal API siginterrupt - allow signals to interrupt system calls sigisemptyset - POSIX signal set operations sigismember - POSIX signal set operations sigorset - POSIX signal set operations sigpause - atomically release blocked signals and wait for interrupt sigqueue - queue a signal and data to a process sigrelse - System V signal API sigset - System V signal API sigsetops - POSIX signal set operations sigstack - set and/or get signal stack context sigwait - wait for a signal sleep - sleep for a specified number of seconds sockaddr - socket address sockaddr_in - socket address sockaddr_in6 - socket address sockaddr_storage - socket address sockaddr_un - socket address sockatmark - band mark socklen_t - socket address speed_t - terminal special characters, baud rates, modes srand48 - random numbers srandom - random number generator stat - file status statvfs - get filesystem statistics strcasecmp - compare two strings ignoring case strdup - duplicate a string strdupa - duplicate a string strfmon - convert monetary value to a string strfmon_l - convert monetary value to a string strncasecmp - compare two strings ignoring case strndup - duplicate a string strndupa - duplicate a string strnlen - size string strptime - convert a string representation of time to a time tm structure strsignal - return string describing signal swab - swap adjacent bytes sys_siglist - return string describing signal sysconf - get configuration information at run time syslog - send messages to the system logger tcdrain - get and set terminal attributes, line control, get and set baud rate tcflag_t - terminal special characters, baud rates, modes tcflow - get and set terminal attributes, line control, get and set baud rate tcflush - get and set terminal attributes, line control, get and set baud rate tcgetattr - get and set terminal attributes, line control, get and set baud rate tcgetpgrp - get and set terminal foreground process group tcgetsid - get session ID tcsendbreak - get and set terminal attributes, line control, get and set baud rate tcsetattr - get and set terminal attributes, line control, get and set baud rate tcsetpgrp - get and set terminal foreground process group tdelete - manage a binary search tree tdestroy - manage a binary search tree telldir - return current location in directory stream tempnam - create a name for a temporary file termios - get and set terminal attributes, line control, get and set baud rate tfind - manage a binary search tree timer_t - timer ID timeval - time in seconds and microseconds timezone - initialize time conversion information toascii - convert character to ASCII tsearch - manage a binary search tree ttyname - return name of a terminal ttyname_r - return name of a terminal twalk - manage a binary search tree twalk_r - manage a binary search tree tzname - initialize time conversion information tzset - initialize time conversion information uid_t - process/user/group identifier ulimit - get and set user limits unlocked_stdio - nonlocking stdio functions unlockpt - unlock a pseudoterminal master/slave pair unsetenv - change or add an environment variable uselocale - set/get the locale for the calling thread versionsort - scan a directory for matching entries vlimit - get/set resource limits vsyslog - send messages to the system logger vtimes - get resource usage wcpcpy - character string, returning a pointer to its end wcpncpy - size string of wide characters, returning a pointer to its end wcscasecmp - character strings, ignoring case wcsdup - character string wcsncasecmp - character strings, ignoring case wcsnlen - character string wcsnrtombs - character string to a multibyte string wcswidth - character string wcwidth - determine columns needed for a wide character wordexp - shell wordfree - shell y0 - Bessel functions of the second kind y0f - Bessel functions of the second kind y0l - Bessel functions of the second kind y1 - Bessel functions of the second kind y1f - Bessel functions of the second kind y1l - Bessel functions of the second kind yn - Bessel functions of the second kind ynf - Bessel functions of the second kind ynl - Bessel functions of the second kind

OTHER (LINUX/GCC)

__clone2 - create a child process _llseek - reposition read/write file offset _syscall - invoking a system call without library support (OBSOLETE)_sysctl - read/write system parameters acct - switch process accounting on or off add_key - add a key to the kernel's key management facility adjtimex - tune kernel clock afs_syscall - unimplemented system calls alloc_hugepages - allocate or free huge pages arch_prctl - specific thread state arm_sync_file_range - sync a file segment with disk bdflush - flush daemon bpf - perform a command on an extended BPF map or program break - unimplemented system calls brk - change data segment size cacheflush - flush contents of instruction and/or data cache capget - set/get capabilities of thread(s)capset - set/get capabilities of thread(s)chroot - change root directory clock_adjtime - tune kernel clock clone - create a child process clone2 - create a child process clone3 - create a child process close_range - close all file descriptors in a given range copy_file_range - Copy a range of data from one file to another create_module - create a loadable module entry delete_module - unload a kernel module epoll_create - open an epoll file descriptor epoll_create1 - open an epoll file descriptor epoll_ctl - control interface for an epoll file descriptor epoll_pwait - wait for an I/O event on an epoll file descriptor epoll_pwait2 - wait for an I/O event on an epoll file descriptor epoll_wait - wait for an I/O event on an epoll file descriptor eventfd - create a file descriptor for event notification eventfd2 - create a file descriptor for event notification execveat - execute program relative to a directory file descriptor exit_group - exit all threads in a process fallocate - manipulate file space fanotify_init - create and initialize fanotify group fanotify_mark - add, remove, or modify an fanotify mark on a filesystem object fattach - unimplemented system calls fdetach - unimplemented system calls fgetxattr - retrieve an extended attribute value finit_module - load a kernel module flistxattr - list extended attribute names flock - apply or remove an advisory lock on an open file free_hugepages - allocate or free huge pages fremovexattr - remove an extended attribute fsetxattr - set an extended attribute value fstatfs - get filesystem statistics fstatfs64 - get filesystem statistics futex - space locking futimesat - change timestamps of a file relative to a directory file descriptor get_kernel_syms - retrieve exported kernel and module symbols get_mempolicy - retrieve NUMA memory policy for a thread get_robust_list - get/set list of robust futexes get_thread_area - local storage information getcpu - determine CPU and NUMA node on which the calling thread is running getdents - get directory entries getdents64 - get directory entries getdomainname - get/set NIS domain name getmsg - unimplemented system calls getpagesize - get memory page size getpmsg - unimplemented system calls getrandom - obtain a series of random bytes getresgid - get real, effective, and saved user/group IDs getresgid32 - get real, effective, and saved user/group IDs getresuid - get real, effective, and saved user/group IDs getresuid32 - get real, effective, and saved user/group IDs gettid - get thread identification getunwind - copy the unwind data to caller's buffer getxattr - retrieve an extended attribute value gtty - unimplemented system calls idle - make process 0 idle inb - port I/O inb_p - port I/O init_module - load a kernel module inl - port I/O inl_p - port I/O inotify_add_watch - add a watch to an initialized inotify instance inotify_init - initialize an inotify instance inotify_init1 - initialize an inotify instance inotify_rm_watch - remove an existing watch from an inotify instance insb - port I/O insl - port I/O insw - port I/O intro - introduction to system calls inw - port I/O inw_p - port I/O io_cancel - cancel an outstanding asynchronous I/O operation io_destroy - destroy an asynchronous I/O context io_getevents - read asynchronous I/O events from the completion queue io_setup - create an asynchronous I/O context io_submit - submit asynchronous I/O blocks for processing ioctl - control device ioctl_console - ioctls for console terminal and virtual consoles ioctl_fat - manipulating the FAT filesystem ioctl_ficlone - share some the data of one file with another file ioctl_ficlonerange - share some the data of one file with another file ioctl_fideduperange - share some the data of one file with another file ioctl_fslabel - get or set a filesystem label ioctl_getfsmap - retrieve the physical layout of the filesystem ioctl_iflags - ioctl() operations for inode flags ioctl_ns - ioctl() operations for Linux namespaces ioctl_tty - ioctls for terminals and serial lines ioctl_userfaultfd - create a file descriptor for handling page faults in user space ioperm - set port input/output permissions iopl - change I/O privilege level ioprio_get - get/set I/O scheduling class and priority ioprio_set - get/set I/O scheduling class and priority ipc - System V IPC system calls isastream - unimplemented system calls kcmp - compare two processes to determine if they share a kernel resource kexec_file_load - load a new kernel for later execution kexec_load - load a new kernel for later execution keyctl - manipulate the kernel's key management facility landlock_add_rule - add a new Landlock rule to a ruleset landlock_create_ruleset - create a new Landlock ruleset landlock_restrict_self - enforce a Landlock ruleset lgetxattr - retrieve an extended attribute value listxattr - list extended attribute names llistxattr - list extended attribute names llseek - reposition read/write file offset lock - unimplemented system calls lookup_dcookie - return a directory entry's path lremovexattr - remove an extended attribute lsetxattr - set an extended attribute value madvise - give advice about use of memory madvise1 - unimplemented system calls mbind - set memory policy for a memory range membarrier - issue memory barriers on a set of threads memfd_create - create an anonymous file memfd_secret - based file to access secret memory regions migrate_pages - move all pages in a process to another set of nodes mincore - determine whether pages are resident in memory mmap2 - map files or devices into memory modify_ldt - process LDT entry mount - mount filesystem mount_setattr - change properties of a mount or mount tree move_pages - move individual pages of a process to another node mpx - unimplemented system calls mq_getsetattr - get/set message queue attributes mremap - remap a virtual memory address name_to_handle_at - obtain handle for a pathname and open file via a handle nfsservctl - syscall interface to kernel nfs daemon open_by_handle_at - obtain handle for a pathname and open file via a handle open_how - how to open a pathname openat2 - open and possibly create a file (extended)outb - port I/O outb_p - port I/O outl - port I/O outl_p - port I/O outsb - port I/O outsl - port I/O outsw - port I/O outw - port I/O outw_p - port I/O pciconfig_iobase - pci device information handling pciconfig_read - pci device information handling pciconfig_write - pci device information handling perf_event_open - set up performance monitoring perfmonctl - 64 performance monitoring unit personality - set the process execution domain phys - unimplemented system calls pidfd_getfd - obtain a duplicate of another process's file descriptor pidfd_open - obtain a file descriptor that refers to a process pidfd_send_signal - send a signal to a process specified by a file descriptor pivot_root - change the root mount pkey_alloc - allocate or free a protection key pkey_free - allocate or free a protection key prctl - operations on a process or thread process_madvise - give advice about use of memory to a process process_vm_readv - transfer data between process address spaces process_vm_writev - transfer data between process address spaces prof - unimplemented system calls ptrace - process trace putmsg - unimplemented system calls putpmsg - unimplemented system calls query_module - query the kernel for various bits pertaining to modules quotactl - manipulate disk quotas readahead - initiate file readahead into page cache readdir - read directory entry reboot - Del recvmmsg - receive multiple messages on a socket remap_file_pages - create a nonlinear file mapping removexattr - remove an extended attribute request_key - request a key from the kernel's key management facility restart_syscall - restart a system call after interruption by a stop signal rt_sigqueueinfo - queue a signal and data rt_sigreturn - return from signal handler and cleanup stack frame rt_tgsigqueueinfo - queue a signal and data s390_guarded_storage - operations with z/Architecture guarded storage facility s390_pci_mmio_read - transfer data to/from PCI MMIO memory page s390_pci_mmio_write - transfer data to/from PCI MMIO memory page s390_runtime_instr - time instrumentation s390_sthyi - emulate STHYI instruction sbrk - change data segment size sched_getaffinity - set and get a thread's CPU affinity mask sched_getattr - set and get scheduling policy and attributes sched_setaffinity - set and get a thread's CPU affinity mask sched_setattr - set and get scheduling policy and attributes seccomp - operate on Secure Computing state of the process seccomp_unotify - space notification mechanism security - unimplemented system calls select_tut - synchronous I/O multiplexing sendfile - transfer data between file descriptors sendfile64 - transfer data between file descriptors sendmmsg - send multiple messages on a socket set_mempolicy - set default NUMA memory policy for a thread and its children set_robust_list - get/set list of robust futexes set_thread_area - local storage information set_tid_address - set pointer to thread ID setdomainname - get/set NIS domain name setfsgid - set group identity used for filesystem checks setfsgid32 - set group identity used for filesystem checks setfsuid - set user identity used for filesystem checks setfsuid32 - set user identity used for filesystem checks setns - reassociate thread with a namespace setresgid - set real, effective, and saved user or group ID setresgid32 - set real, effective, and saved user or group ID setresuid - set real, effective, and saved user or group ID setresuid32 - set real, effective, and saved user or group ID setup - setup devices and filesystems, mount root filesystem setxattr - set an extended attribute value sgetmask - manipulation of signal mask (obsolete)signalfd - create a file descriptor for accepting signals signalfd4 - create a file descriptor for accepting signals sigreturn - return from signal handler and cleanup stack frame socketcall - socket system calls splice - splice data to/from a pipe spu_create - create a new spu context spu_run - execute an SPU context ssetmask - manipulation of signal mask (obsolete)statfs - get filesystem statistics statfs64 - get filesystem statistics statx - get file status (extended)stime - set time stty - unimplemented system calls subpage_prot - define a subpage protection for an address range swapoff - start/stop swapping to file/device swapon - start/stop swapping to file/device sync_file_range - sync a file segment with disk sync_file_range2 - sync a file segment with disk syscall - indirect system call syscalls - Linux system calls sysctl - read/write system parameters sysfs - get filesystem type information sysinfo - return system information syslog - read and/or clear kernel message ring buffer; set console_loglevel tee - duplicating pipe content tgkill - send a signal to a thread timerfd_create - timers that notify via file descriptors timerfd_gettime - timers that notify via file descriptors timerfd_settime - timers that notify via file descriptors tkill - send a signal to a thread tuxcall - unimplemented system calls umount - unmount filesystem umount2 - unmount filesystem unimplemented - unimplemented system calls unshare - disassociate parts of the process execution context uselib - load shared library userfaultfd - create a file descriptor for handling page faults in user space ustat - get filesystem statistics vfork - create a child process and block parent vhangup - virtually hangup the current terminal vm86 - enter virtual 8086 mode vm86old - enter virtual 8086 mode vmsplice - splice user pages to/from a pipe vserver - unimplemented system calls wait3 - wait for process to change state, BSD style wait4 - wait for process to change state, BSD style CIRCLEQ_EMPTY - implementation of a doubly linked circular queue CIRCLEQ_ENTRY - implementation of a doubly linked circular queue CIRCLEQ_FIRST - implementation of a doubly linked circular queue CIRCLEQ_FOREACH - implementation of a doubly linked circular queue CIRCLEQ_FOREACH_REVERSE - implementation of a doubly linked circular queue CIRCLEQ_HEAD - implementation of a doubly linked circular queue CIRCLEQ_HEAD_INITIALIZER - implementation of a doubly linked circular queue CIRCLEQ_INIT - implementation of a doubly linked circular queue CIRCLEQ_INSERT_AFTER - implementation of a doubly linked circular queue CIRCLEQ_INSERT_BEFORE - implementation of a doubly linked circular queue CIRCLEQ_INSERT_HEAD - implementation of a doubly linked circular queue CIRCLEQ_INSERT_TAIL - implementation of a doubly linked circular queue CIRCLEQ_LAST - implementation of a doubly linked circular queue CIRCLEQ_LOOP_NEXT - implementation of a doubly linked circular queue CIRCLEQ_LOOP_PREV - implementation of a doubly linked circular queue CIRCLEQ_NEXT - implementation of a doubly linked circular queue CIRCLEQ_PREV - implementation of a doubly linked circular queue CIRCLEQ_REMOVE - implementation of a doubly linked circular queue CPU_ALLOC - macros for manipulating CPU sets CPU_ALLOC_SIZE - macros for manipulating CPU sets CPU_AND - macros for manipulating CPU sets CPU_AND_S - macros for manipulating CPU sets CPU_CLR - macros for manipulating CPU sets CPU_CLR_S - macros for manipulating CPU sets CPU_COUNT - macros for manipulating CPU sets CPU_COUNT_S - macros for manipulating CPU sets CPU_EQUAL - macros for manipulating CPU sets CPU_EQUAL_S - macros for manipulating CPU sets CPU_FREE - macros for manipulating CPU sets CPU_ISSET - macros for manipulating CPU sets CPU_ISSET_S - macros for manipulating CPU sets CPU_OR - macros for manipulating CPU sets CPU_OR_S - macros for manipulating CPU sets CPU_SET - macros for manipulating CPU sets CPU_SET_S - macros for manipulating CPU sets CPU_XOR - macros for manipulating CPU sets CPU_XOR_S - macros for manipulating CPU sets CPU_ZERO - macros for manipulating CPU sets CPU_ZERO_S - macros for manipulating CPU sets DES_FAILED - fast DES encryption EOF - end of file or error indicator EXIT_FAILURE - termination status constants EXIT_SUCCESS - termination status constants LIST_EMPTY - implementation of a doubly linked list LIST_ENTRY - implementation of a doubly linked list LIST_FIRST - implementation of a doubly linked list LIST_FOREACH - implementation of a doubly linked list LIST_HEAD - implementation of a doubly linked list LIST_HEAD_INITIALIZER - implementation of a doubly linked list LIST_INIT - implementation of a doubly linked list LIST_INSERT_AFTER - implementation of a doubly linked list LIST_INSERT_BEFORE - implementation of a doubly linked list LIST_INSERT_HEAD - implementation of a doubly linked list LIST_NEXT - implementation of a doubly linked list LIST_REMOVE - implementation of a doubly linked list MAX - maximum or minimum of two values MIN - maximum or minimum of two values NULL - null pointer constant PA_CHAR - like functions PA_DOUBLE - like functions PA_FLAG_LONG - like functions PA_FLAG_LONG_DOUBLE - like functions PA_FLAG_LONG_LONG - like functions PA_FLAG_PTR - like functions PA_FLAG_SHORT - like functions PA_FLOAT - like functions PA_INT - like functions PA_LAST - like functions PA_POINTER - like functions PA_STRING - like functions PA_WCHAR - like functions PA_WSTRING - like functions SIMPLEQ_EMPTY - implementation of a singly linked tail queue SIMPLEQ_ENTRY - implementation of a singly linked tail queue SIMPLEQ_FIRST - implementation of a singly linked tail queue SIMPLEQ_FOREACH - implementation of a singly linked tail queue SIMPLEQ_HEAD - implementation of a singly linked tail queue SIMPLEQ_HEAD_INITIALIZER - implementation of a singly linked tail queue SIMPLEQ_INIT - implementation of a singly linked tail queue SIMPLEQ_INSERT_AFTER - implementation of a singly linked tail queue SIMPLEQ_INSERT_HEAD - implementation of a singly linked tail queue SIMPLEQ_INSERT_TAIL - implementation of a singly linked tail queue SIMPLEQ_NEXT - implementation of a singly linked tail queue SIMPLEQ_REMOVE - implementation of a singly linked tail queue SIMPLEQ_REMOVE_HEAD - implementation of a singly linked tail queue SLIST_EMPTY - implementation of a singly linked list SLIST_ENTRY - implementation of a singly linked list SLIST_FIRST - implementation of a singly linked list SLIST_FOREACH - implementation of a singly linked list SLIST_HEAD - implementation of a singly linked list SLIST_HEAD_INITIALIZER - implementation of a singly linked list SLIST_INIT - implementation of a singly linked list SLIST_INSERT_AFTER - implementation of a singly linked list SLIST_INSERT_HEAD - implementation of a singly linked list SLIST_NEXT - implementation of a singly linked list SLIST_REMOVE - implementation of a singly linked list SLIST_REMOVE_HEAD - implementation of a singly linked list STAILQ_CONCAT - implementation of a singly linked tail queue STAILQ_EMPTY - implementation of a singly linked tail queue STAILQ_ENTRY - implementation of a singly linked tail queue STAILQ_FIRST - implementation of a singly linked tail queue STAILQ_FOREACH - implementation of a singly linked tail queue STAILQ_HEAD - implementation of a singly linked tail queue STAILQ_HEAD_INITIALIZER - implementation of a singly linked tail queue STAILQ_INIT - implementation of a singly linked tail queue STAILQ_INSERT_AFTER - implementation of a singly linked tail queue STAILQ_INSERT_HEAD - implementation of a singly linked tail queue STAILQ_INSERT_TAIL - implementation of a singly linked tail queue STAILQ_NEXT - implementation of a singly linked tail queue STAILQ_REMOVE - implementation of a singly linked tail queue STAILQ_REMOVE_HEAD - implementation of a singly linked tail queue TAILQ_CONCAT - implementation of a doubly linked tail queue TAILQ_EMPTY - implementation of a doubly linked tail queue TAILQ_ENTRY - implementation of a doubly linked tail queue TAILQ_FIRST - implementation of a doubly linked tail queue TAILQ_FOREACH - implementation of a doubly linked tail queue TAILQ_FOREACH_REVERSE - implementation of a doubly linked tail queue TAILQ_HEAD - implementation of a doubly linked tail queue TAILQ_HEAD_INITIALIZER - implementation of a doubly linked tail queue TAILQ_INIT - implementation of a doubly linked tail queue TAILQ_INSERT_AFTER - implementation of a doubly linked tail queue TAILQ_INSERT_BEFORE - implementation of a doubly linked tail queue TAILQ_INSERT_HEAD - implementation of a doubly linked tail queue TAILQ_INSERT_TAIL - implementation of a doubly linked tail queue TAILQ_LAST - implementation of a doubly linked tail queue TAILQ_NEXT - implementation of a doubly linked tail queue TAILQ_PREV - implementation of a doubly linked tail queue TAILQ_REMOVE - implementation of a doubly linked tail queue TAILQ_SWAP - implementation of a doubly linked tail queue __after_morecore_hook - malloc debugging variables (DEPRECATED)__fbufsize - interfaces to stdio FILE structure __flbf - interfaces to stdio FILE structure __fpending - interfaces to stdio FILE structure __fpurge - purge a stream __freadable - interfaces to stdio FILE structure __freading - interfaces to stdio FILE structure __free_hook - malloc debugging variables (DEPRECATED)__fsetlocking - interfaces to stdio FILE structure __fwritable - interfaces to stdio FILE structure __fwriting - interfaces to stdio FILE structure __malloc_hook - malloc debugging variables (DEPRECATED)__malloc_initialize_hook - malloc debugging variables (DEPRECATED)__memalign_hook - malloc debugging variables (DEPRECATED)__ppc_get_timebase - get the current value of the Time Base Register on Power architecture and its frequency.__ppc_get_timebase_freq - get the current value of the Time Base Register on Power architecture and its frequency.__ppc_mdoio - Hint the processor to release shared resources __ppc_mdoom - Hint the processor to release shared resources __ppc_set_ppr_low - Set the Program Priority Register __ppc_set_ppr_med - Set the Program Priority Register __ppc_set_ppr_med_high - Set the Program Priority Register __ppc_set_ppr_med_low - Set the Program Priority Register __ppc_set_ppr_very_low - Set the Program Priority Register __ppc_yield - Hint the processor to release shared resources __realloc_hook - malloc debugging variables (DEPRECATED)__setfpucw - set FPU control word on i386 architecture (obsolete)_flushlbf - interfaces to stdio FILE structure addmntent - get filesystem descriptor file entry addseverity - introduce new severity classes adjtime - correct the time to synchronize the system clock aio_init - asynchronous I/O initialization alloca - allocate memory that is automatically freed arc4random - secure pseudorandom number generator arc4random_buf - secure pseudorandom number generator arc4random_uniform - secure pseudorandom number generator argz - functions to handle an argz list argz_add - functions to handle an argz list argz_add_sep - functions to handle an argz list argz_append - functions to handle an argz list argz_count - functions to handle an argz list argz_create - functions to handle an argz list argz_create_sep - functions to handle an argz list argz_delete - functions to handle an argz list argz_extract - functions to handle an argz list argz_insert - functions to handle an argz list argz_next - functions to handle an argz list argz_replace - functions to handle an argz list argz_stringify - functions to handle an argz list asprintf - print to allocated string assert_perror - test errnum and abort auth_destroy - library routines for remote procedure calls authnone_create - library routines for remote procedure calls authunix_create - library routines for remote procedure calls authunix_create_default - library routines for remote procedure calls backtrace - debugging backtrace_symbols - debugging backtrace_symbols_fd - debugging bcmp - compare byte sequences bcopy - copy byte sequence be16toh - endian byte order be32toh - endian byte order be64toh - endian byte order bindresvport - bind a socket to a privileged IP port bsd_signal - signal handling with BSD semantics bstring - byte string operations bswap - reverse order of bytes bswap_16 - reverse order of bytes bswap_32 - reverse order of bytes bswap_64 - reverse order of bytes btree - btree database access method bzero - zero a byte string callrpc - library routines for remote procedure calls canonicalize_file_name - return the canonicalized absolute pathname cbc_crypt - fast DES encryption cfree - free allocated memory circleq - implementation of a doubly linked circular queue clnt_broadcast - library routines for remote procedure calls clnt_call - library routines for remote procedure calls clnt_control - library routines for remote procedure calls clnt_create - library routines for remote procedure calls clnt_destroy - library routines for remote procedure calls clnt_freeres - library routines for remote procedure calls clnt_geterr - library routines for remote procedure calls clnt_pcreateerror - library routines for remote procedure calls clnt_perrno - library routines for remote procedure calls clnt_perror - library routines for remote procedure calls clnt_spcreateerror - library routines for remote procedure calls clnt_sperrno - library routines for remote procedure calls clnt_sperror - library routines for remote procedure calls clntraw_create - library routines for remote procedure calls clnttcp_create - library routines for remote procedure calls clntudp_bufcreate - library routines for remote procedure calls clntudp_create - library routines for remote procedure calls clog10 - 10 logarithm of a complex number clog10f - 10 logarithm of a complex number clog10l - 10 logarithm of a complex number clog2 - 2 logarithm of a complex number clog2f - 2 logarithm of a complex number clog2l - 2 logarithm of a complex number daemon - run in the background db - database access methods dbopen - database access methods des_crypt - fast DES encryption des_setparity - fast DES encryption dl_iterate_phdr - walk through list of shared objects dladdr - translate address to symbolic information dladdr1 - translate address to symbolic information dlinfo - obtain information about a dynamically loaded object dn_comp - resolver routines dn_expand - resolver routines drand48_r - random numbers reentrantly dysize - get number of days for a given year eaccess - check effective user's permissions for a file ecb_crypt - fast DES encryption ecvt - point number to a string ecvt_r - point number to a string edata - end of program segments end - end of program segments endaliasent - read an alias entry endfsent - handle fstab entries endian - endian byte order endmntent - get filesystem descriptor file entry endnetgrent - handle network group entries endrpcent - get RPC entry endspent - get shadow password file entry endttyent - get ttys file entry endusershell - get permitted user shells endutent - access utmp file entries endutxent - access utmp file entries envz - environment string support envz_add - environment string support envz_entry - environment string support envz_get - environment string support envz_merge - environment string support envz_remove - environment string support envz_strip - environment string support epoll_data - epoll event epoll_data_t - epoll event epoll_event - epoll event erand48_r - random numbers reentrantly err - formatted error messages errno - number of last error error - glibc error reporting functions error_at_line - glibc error reporting functions error_message_count - glibc error reporting functions error_one_per_line - glibc error reporting functions error_print_progname - glibc error reporting functions errx - formatted error messages etext - end of program segments ether_aton - Ethernet address manipulation routines ether_aton_r - Ethernet address manipulation routines ether_hostton - Ethernet address manipulation routines ether_line - Ethernet address manipulation routines ether_ntoa - Ethernet address manipulation routines ether_ntoa_r - Ethernet address manipulation routines ether_ntohost - Ethernet address manipulation routines euidaccess - check effective user's permissions for a file eventfd_read - create a file descriptor for event notification eventfd_write - create a file descriptor for event notification exp10 - 10 exponential function exp10f - 10 exponential function exp10l - 10 exponential function explicit_bzero - zero a byte string fcloseall - close all open streams fcvt - point number to a string fcvt_r - point number to a string fgetgrent - get group file entry fgetgrent_r - get group file entry reentrantly fgetpwent - get password file entry fgetpwent_r - get passwd file entry reentrantly fgetspent - get shadow password file entry fgetspent_r - get shadow password file entry finite - point classification functions finitef - point classification functions finitel - point classification functions fopencookie - opening a custom stream forkpty - terminal utility functions fpurge - purge a stream freehostent - get network hostnames and addresses freeifaddrs - get interface addresses ftime - return date and time fts - traverse a file hierarchy fts_children - traverse a file hierarchy fts_close - traverse a file hierarchy fts_open - traverse a file hierarchy fts_read - traverse a file hierarchy fts_set - traverse a file hierarchy futimes - change file timestamps gai_cancel - asynchronous network address and service translation gai_error - asynchronous network address and service translation gai_suspend - asynchronous network address and service translation gamma - (logarithm of the) gamma function gammaf - (logarithm of the) gamma function gammal - (logarithm of the) gamma function gcvt - point number to a string get_avphys_pages - get total and available physical page counts get_myaddress - library routines for remote procedure calls get_nprocs - get number of processors get_nprocs_conf - get number of processors get_phys_pages - get total and available physical page counts getaddrinfo_a - asynchronous network address and service translation getaliasbyname - read an alias entry getaliasbyname_r - read an alias entry getaliasent - read an alias entry getaliasent_r - read an alias entry getauxval - retrieve a value from the auxiliary vector getcontext - get or set the user context getdirentries - independent format getdtablesize - get file descriptor table size getentropy - fill a buffer with random bytes getfsent - handle fstab entries getfsfile - handle fstab entries getfsspec - handle fstab entries getgrent_r - get group file entry reentrantly getgrouplist - get list of groups to which a user belongs getifaddrs - get interface addresses getipnodebyaddr - get network hostnames and addresses getipnodebyname - get network hostnames and addresses getloadavg - get system load averages getmntent - get filesystem descriptor file entry getmntent_r - get filesystem descriptor file entry getnetbyaddr_r - get network entry (reentrant)getnetbyname_r - get network entry (reentrant)getnetent_r - get network entry (reentrant)getnetgrent - handle network group entries getnetgrent_r - handle network group entries getpass - get a password getprotobyname_r - get protocol entry (reentrant)getprotobynumber_r - get protocol entry (reentrant)getprotoent_r - get protocol entry (reentrant)getpt - open a new pseudoterminal master getpw - reconstruct password line entry getpwent_r - get passwd file entry reentrantly getrpcbyname - get RPC entry getrpcbyname_r - get RPC entry (reentrant)getrpcbynumber - get RPC entry getrpcbynumber_r - get RPC entry (reentrant)getrpcent - get RPC entry getrpcent_r - get RPC entry (reentrant)getrpcport - get RPC port number getservbyname_r - get service entry (reentrant)getservbyport_r - get service entry (reentrant)getservent_r - get service entry (reentrant)getspent - get shadow password file entry getspent_r - get shadow password file entry getspnam - get shadow password file entry getspnam_r - get shadow password file entry getttyent - get ttys file entry getttynam - get ttys file entry getusershell - get permitted user shells getutent - access utmp file entries getutent_r - access utmp file entries getutid - access utmp file entries getutid_r - access utmp file entries getutline - access utmp file entries getutline_r - access utmp file entries getutmp - copy utmp structure to utmpx, and vice versa getutmpx - copy utmp structure to utmpx, and vice versa getutxent - access utmp file entries getutxid - access utmp file entries getutxline - access utmp file entries getw - input and output of words (ints)gnu_dev_major - manage a device number gnu_dev_makedev - manage a device number gnu_dev_minor - manage a device number gnu_get_libc_release - get glibc version and release gnu_get_libc_version - get glibc version and release group_member - test whether a process is in a group gsignal - software signal facility hash - hash database access method hasmntopt - get filesystem descriptor file entry htobe16 - endian byte order htobe32 - endian byte order htobe64 - endian byte order htole16 - endian byte order htole32 - endian byte order htole64 - endian byte order index - locate character in string inet_net_ntop - Internet network number conversion inet_net_pton - Internet network number conversion initgroups - initialize the supplementary group access list initstate_r - reentrant random number generator innetgr - handle network group entries intro - introduction to library functions iruserok - routines for returning a stream to a remote command iruserok_af - routines for returning a stream to a remote command isfdtype - test file type of a file descriptor isinff - point classification functions isinfl - point classification functions isnanf - point classification functions isnanl - point classification functions itimerspec - interval for a timer with nanosecond precision jrand48_r - random numbers reentrantly key_decryptsession - interfaces to rpc keyserver daemon key_encryptsession - interfaces to rpc keyserver daemon key_gendes - interfaces to rpc keyserver daemon key_secretkey_is_set - interfaces to rpc keyserver daemon key_setsecret - interfaces to rpc keyserver daemon klogctl - read and/or clear kernel message ring buffer; set console_loglevel lckpwdf - get shadow password file entry lcong48_r - random numbers reentrantly le16toh - endian byte order le32toh - endian byte order le64toh - endian byte order list - implementation of a doubly linked list login - write utmp and wtmp entries login_tty - terminal utility functions logout - write utmp and wtmp entries logwtmp - append an entry to the wtmp file lrand48_r - random numbers reentrantly lseek64 - bit read/write file offset lutimes - change file timestamps major - manage a device number makecontext - manipulate user context makedev - manage a device number mallinfo - obtain memory allocation information mallinfo2 - obtain memory allocation information malloc_get_state - record and restore state of malloc implementation malloc_hook - malloc debugging variables (DEPRECATED)malloc_info - export malloc state to a stream malloc_set_state - record and restore state of malloc implementation malloc_stats - print memory allocation statistics malloc_trim - release free memory from the heap malloc_usable_size - obtain size of block of memory allocated from heap mallopt - set memory allocation parameters matherr - SVID math library exception handling mcheck - heap consistency checking mcheck_check_all - heap consistency checking mcheck_pedantic - heap consistency checking memfrob - frobnicate (obfuscate) a memory area memmem - locate a substring mempcpy - copy memory area minor - manage a device number mktemp - make a unique temporary filename mpool - shared memory buffer pool mprobe - heap consistency checking mrand48_r - random numbers reentrantly mtrace - malloc tracing muntrace - malloc tracing netlink - Netlink macros nextdown - point number toward positive/negative infinity nextdownf - point number toward positive/negative infinity nextdownl - point number toward positive/negative infinity nextup - point number toward positive/negative infinity nextupf - point number toward positive/negative infinity nextupl - point number toward positive/negative infinity nrand48_r - random numbers reentrantly ntp_adjtime - tune kernel clock ntp_gettime - get time parameters (NTP daemon interface)ntp_gettimex - get time parameters (NTP daemon interface)on_exit - register a function to be called at normal process termination openpty - terminal utility functions passwd2des - RFS password encryption pmap_getmaps - library routines for remote procedure calls pmap_getport - library routines for remote procedure calls pmap_rmtcall - library routines for remote procedure calls pmap_set - library routines for remote procedure calls pmap_unset - library routines for remote procedure calls pow10 - 10 power functions pow10f - 10 power functions pow10l - 10 power functions powerof2 - test if a value is a power of 2 printf - like functions printf_arginfo_size_function - like functions printf_function - like functions printf_info - like functions printf_va_arg_function - like functions profil - execution time profile program_invocation_name - obtain name used to invoke calling program program_invocation_short_name - obtain name used to invoke calling program pthread_attr_getaffinity_np - set/get CPU affinity attribute in thread attributes object pthread_attr_getsigmask_np - set/get signal mask attribute in thread attributes object pthread_attr_getstackaddr - set/get stack address attribute in thread attributes object pthread_attr_setaffinity_np - set/get CPU affinity attribute in thread attributes object pthread_attr_setsigmask_np - set/get signal mask attribute in thread attributes object pthread_attr_setstackaddr - set/get stack address attribute in thread attributes object pthread_cleanup_pop_restore_np - up handlers while saving cancelability type pthread_cleanup_push_defer_np - up handlers while saving cancelability type pthread_getaffinity_np - set/get CPU affinity of a thread pthread_getattr_default_np - creation attributes pthread_getattr_np - get attributes of created thread pthread_getname_np - set/get the name of a thread pthread_kill_other_threads_np - terminate all other threads in process pthread_rwlockattr_getkind_np - write lock attribute object pthread_rwlockattr_setkind_np - write lock attribute object pthread_setaffinity_np - set/get CPU affinity of a thread pthread_setattr_default_np - creation attributes pthread_setname_np - set/get the name of a thread pthread_sigqueue - queue a signal and data to a thread pthread_timedjoin_np - try to join with a terminated thread pthread_tryjoin_np - try to join with a terminated thread pthread_yield - yield the processor putgrent - write a group database entry to a file putpwent - write a password file entry putspent - get shadow password file entry pututline - access utmp file entries pututxline - access utmp file entries putw - input and output of words (ints)qecvt - point number to a string qecvt_r - point number to a string qfcvt - point number to a string qfcvt_r - point number to a string qgcvt - point number to a string queue - implementations of linked lists and queues random_r - reentrant random number generator rcmd - routines for returning a stream to a remote command rcmd_af - routines for returning a stream to a remote command re_comp - BSD regex functions re_exec - BSD regex functions recno - record number database access method register_printf_modifier - like functions register_printf_specifier - like functions register_printf_type - like functions registerrpc - library routines for remote procedure calls res_init - resolver routines res_mkquery - resolver routines res_nclose - resolver routines res_ninit - resolver routines res_nmkquery - resolver routines res_nquery - resolver routines res_nquerydomain - resolver routines res_nsearch - resolver routines res_nsend - resolver routines res_query - resolver routines res_querydomain - resolver routines res_search - resolver routines res_send - resolver routines resolver - resolver routines rexec - return stream to a remote command rexec_af - return stream to a remote command rindex - locate character in string roundup - round up in steps rpc - library routines for remote procedure calls rpmatch - determine if the answer to a question is affirmative or negative rresvport - routines for returning a stream to a remote command rresvport_af - routines for returning a stream to a remote command rtime - get time from a remote machine rtnetlink - macros to manipulate rtnetlink messages ruserok - routines for returning a stream to a remote command ruserok_af - routines for returning a stream to a remote command scalb - point number by integral power of radix (OBSOLETE)scalbf - point number by integral power of radix (OBSOLETE)scalbl - point number by integral power of radix (OBSOLETE)sched_getcpu - determine CPU on which the calling thread is running seed48_r - random numbers reentrantly setaliasent - read an alias entry setcontext - get or set the user context setfsent - handle fstab entries setmntent - get filesystem descriptor file entry setnetgrent - handle network group entries setrpcent - get RPC entry setspent - get shadow password file entry setstate_r - reentrant random number generator setttyent - get ttys file entry setusershell - get permitted user shells setutent - access utmp file entries setutxent - access utmp file entries sgetspent - get shadow password file entry sgetspent_r - get shadow password file entry sigblock - BSD signal API sigevent - overview of system data types siggetmask - BSD signal API siginfo_t - overview of system data types sigmask - BSD signal API significand - point number significandf - point number significandl - point number sigset_t - overview of system data types sigsetmask - BSD signal API sigval - overview of system data types sigvec - BSD signal API simpleq - implementation of a singly linked tail queue sincos - calculate sin and cos simultaneously sincosf - calculate sin and cos simultaneously sincosl - calculate sin and cos simultaneously slist - implementation of a singly linked list srand48_r - random numbers reentrantly srandom_r - reentrant random number generator ssignal - software signal facility stailq - implementation of a singly linked tail queue stdio_ext - interfaces to stdio FILE structure stpecpy - copying strings and character sequences stpecpyx - copying strings and character sequences strfromd - point value into a string strfromf - point value into a string strfroml - point value into a string strfry - randomize a string string - string operations strsep - extract token from string strverscmp - compare two version strings svc_destroy - library routines for remote procedure calls svc_freeargs - library routines for remote procedure calls svc_getargs - library routines for remote procedure calls svc_getcaller - library routines for remote procedure calls svc_getreq - library routines for remote procedure calls svc_getreqset - library routines for remote procedure calls svc_register - library routines for remote procedure calls svc_run - library routines for remote procedure calls svc_sendreply - library routines for remote procedure calls svc_unregister - library routines for remote procedure calls svcerr_auth - library routines for remote procedure calls svcerr_decode - library routines for remote procedure calls svcerr_noproc - library routines for remote procedure calls svcerr_noprog - library routines for remote procedure calls svcerr_progvers - library routines for remote procedure calls svcerr_systemerr - library routines for remote procedure calls svcerr_weakauth - library routines for remote procedure calls svcfd_create - library routines for remote procedure calls svcraw_create - library routines for remote procedure calls svctcp_create - library routines for remote procedure calls svcudp_bufcreate - library routines for remote procedure calls svcudp_create - library routines for remote procedure calls swapcontext - manipulate user context sysexits - exit codes for programs sysv_signal - signal handling with System V semantics tailq - implementation of a doubly linked tail queue timegm - inverses of gmtime and localtime timelocal - inverses of gmtime and localtime timeradd - timeval operations timerclear - timeval operations timercmp - timeval operations timerisset - timeval operations timersub - timeval operations ttyslot - find the slot of the current user's terminal in some file ualarm - schedule signal after given number of microseconds ulckpwdf - get shadow password file entry undocumented - undocumented library functions updwtmp - append an entry to the wtmp file updwtmpx - append an entry to the wtmp file usleep - suspend execution for microsecond intervals ustpcpy - copying strings and character sequences ustr2stp - copying strings and character sequences utmpname - access utmp file entries utmpxname - access utmp file entries vasprintf - print to allocated string verr - formatted error messages verrx - formatted error messages vwarn - formatted error messages vwarnx - formatted error messages warn - formatted error messages warnx - formatted error messages wmempcpy - copy memory area xcrypt - RFS password encryption xdecrypt - RFS password encryption xdr - library routines for external data representation xdr_accepted_reply - library routines for remote procedure calls xdr_array - library routines for external data representation xdr_authunix_parms - library routines for remote procedure calls xdr_bool - library routines for external data representation xdr_bytes - library routines for external data representation xdr_callhdr - library routines for remote procedure calls xdr_callmsg - library routines for remote procedure calls xdr_char - library routines for external data representation xdr_destroy - library routines for external data representation xdr_double - library routines for external data representation xdr_enum - library routines for external data representation xdr_float - library routines for external data representation xdr_free - library routines for external data representation xdr_getpos - library routines for external data representation xdr_inline - library routines for external data representation xdr_int - library routines for external data representation xdr_long - library routines for external data representation xdr_opaque - library routines for external data representation xdr_opaque_auth - library routines for remote procedure calls xdr_pmap - library routines for remote procedure calls xdr_pmaplist - library routines for remote procedure calls xdr_pointer - library routines for external data representation xdr_reference - library routines for external data representation xdr_rejected_reply - library routines for remote procedure calls xdr_replymsg - library routines for remote procedure calls xdr_setpos - library routines for external data representation xdr_short - library routines for external data representation xdr_string - library routines for external data representation xdr_u_char - library routines for external data representation xdr_u_int - library routines for external data representation xdr_u_long - library routines for external data representation xdr_u_short - library routines for external data representation xdr_union - library routines for external data representation xdr_vector - library routines for external data representation xdr_void - library routines for external data representation xdr_wrapstring - library routines for external data representation xdrmem_create - library routines for external data representation xdrrec_create - library routines for external data representation xdrrec_endofrecord - library routines for external data representation xdrrec_eof - library routines for external data representation xdrrec_skiprecord - library routines for external data representation xdrstdio_create - library routines for external data representation xencrypt - RFS password encryption xprt_register - library routines for remote procedure calls xprt_unregister - library routines for remote procedure calls zustr2stp - copying strings and character sequences zustr2ustp - copying strings and character sequences