FD_CLR sys_select.h pselect, select - synchronous I/O multiplexing
FD_ISSET sys_select.h pselect, select - synchronous I/O multiplexing
FD_SET sys_select.h pselect, select - synchronous I/O multiplexing
FD_ZERO sys_select.h pselect, select - synchronous I/O multiplexing
_Exit stdlib.h unistd.h _Exit, _exit - terminate a process
_exit stdlib.h unistd.h _Exit, _exit - terminate a process
_longjmp setjmp.h OB XSI _longjmp, _setjmp - non-local goto
_setjmp setjmp.h OB XSI _longjmp, _setjmp - non-local goto
_tolower ctype.h OB XSI _tolower - transliterate uppercase characters to lowercase
_toupper ctype.h OB XSI _toupper - transliterate lowercase characters to uppercase
a64l stdlib.h XSI a64l, l64a - convert between a 32-bit integer and a radix-64 ASCII string
abort stdlib.h abort - generate an abnormal process abort
abs stdlib.h abs - return an integer absolute value
accept sys_socket.h accept - accept a new connection on a socket
access unistd.h access, faccessat - determine accessibility of a file relative to directory file descriptor
acos math.h acos, acosf, acosl - arc cosine functions
acosf math.h acos, acosf, acosl - arc cosine functions
acosh math.h acosh, acoshf, acoshl - inverse hyperbolic cosine functions
acoshf math.h acosh, acoshf, acoshl - inverse hyperbolic cosine functions
acoshl math.h acosh, acoshf, acoshl - inverse hyperbolic cosine functions
acosl math.h acos, acosf, acosl - arc cosine functions
aio_cancel aio.h aio_cancel - cancel an asynchronous I/O request
aio_error aio.h aio_error - retrieve errors status for an asynchronous I/O operation
aio_fsync aio.h aio_fsync - asynchronous file synchronization
aio_read aio.h aio_read - asynchronous read from a file
aio_return aio.h aio_return - retrieve return status of an asynchronous I/O operation
aio_suspend aio.h aio_suspend - wait for an asynchronous I/O request
aio_write aio.h aio_write - asynchronous write to a file
alarm unistd.h alarm - schedule an alarm signal
alphasort dirent.h alphasort, scandir - scan a directory
asctime time.h OB OB CX asctime, asctime_r - convert date and time to a string
asctime_r time.h OB OB CX asctime, asctime_r - convert date and time to a string
asin math.h asin, asinf, asinl - arc sine function
asinf math.h asin, asinf, asinl - arc sine function
asinh math.h asinh, asinhf, asinhl - inverse hyperbolic sine functions
asinhf math.h asinh, asinhf, asinhl - inverse hyperbolic sine functions
asinhl math.h asinh, asinhf, asinhl - inverse hyperbolic sine functions
asinl math.h asin, asinf, asinl - arc sine function
assert assert.h assert - insert program diagnostics
atan math.h atan, atanf, atanl - arc tangent function
atan2 math.h atan2, atan2f, atan2l - arc tangent functions
atan2f math.h atan2, atan2f, atan2l - arc tangent functions
atan2l math.h atan2, atan2f, atan2l - arc tangent functions
atanf math.h atan, atanf, atanl - arc tangent function
atanh math.h atanh, atanhf, atanhl - inverse hyperbolic tangent functions
atanhf math.h atanh, atanhf, atanhl - inverse hyperbolic tangent functions
atanhl math.h atanh, atanhf, atanhl - inverse hyperbolic tangent functions
atanl math.h atan, atanf, atanl - arc tangent function
atexit stdlib.h atexit - register a function to run at process termination
atof stdlib.h atof - convert a string to a double-precision number
atoi stdlib.h atoi - convert a string to an integer
atol stdlib.h atol, atoll - convert a string to a long integer
atoll stdlib.h atol, atoll - convert a string to a long integer
basename libgen.h XSI basename - return the last component of a pathname
bind sys_socket.h bind - bind a name to a socket
bsearch stdlib.h bsearch - binary search a sorted table
btowc stdio.h wchar.h btowc - single byte to wide character conversion
cabs complex.h cabs, cabsf, cabsl - return a complex absolute value
cabsf complex.h cabs, cabsf, cabsl - return a complex absolute value
cabsl complex.h cabs, cabsf, cabsl - return a complex absolute value
cacos complex.h cacos, cacosf, cacosl - complex arc cosine functions
cacosf complex.h cacos, cacosf, cacosl - complex arc cosine functions
cacosh complex.h cacosh, cacoshf, cacoshl - complex arc hyperbolic cosine functions
cacoshf complex.h cacosh, cacoshf, cacoshl - complex arc hyperbolic cosine functions
cacoshl complex.h cacosh, cacoshf, cacoshl - complex arc hyperbolic cosine functions
cacosl complex.h cacos, cacosf, cacosl - complex arc cosine functions
calloc stdlib.h calloc - a memory allocator
carg complex.h carg, cargf, cargl - complex argument functions
cargf complex.h carg, cargf, cargl - complex argument functions
cargl complex.h carg, cargf, cargl - complex argument functions
casin complex.h casin, casinf, casinl - complex arc sine functions
casinf complex.h casin, casinf, casinl - complex arc sine functions
casinh complex.h casinh, casinhf, casinhl - complex arc hyperbolic sine functions
casinhf complex.h casinh, casinhf, casinhl - complex arc hyperbolic sine functions
casinhl complex.h casinh, casinhf, casinhl - complex arc hyperbolic sine functions
casinl complex.h casin, casinf, casinl - complex arc sine functions
catan complex.h catan, catanf, catanl - complex arc tangent functions
catanf complex.h catan, catanf, catanl - complex arc tangent functions
catanh complex.h catanh, catanhf, catanhl - complex arc hyperbolic tangent functions
catanhf complex.h catanh, catanhf, catanhl - complex arc hyperbolic tangent functions
catanhl complex.h catanh, catanhf, catanhl - complex arc hyperbolic tangent functions
catanl complex.h catan, catanf, catanl - complex arc tangent functions
catclose nl_types.h catclose - close a message catalog descriptor
catgets nl_types.h catgets - read a program message
catopen nl_types.h catopen - open a message catalog
cbrt math.h cbrt, cbrtf, cbrtl - cube root functions
cbrtf math.h cbrt, cbrtf, cbrtl - cube root functions
cbrtl math.h cbrt, cbrtf, cbrtl - cube root functions
ccos complex.h ccos, ccosf, ccosl - complex cosine functions
ccosf complex.h ccos, ccosf, ccosl - complex cosine functions
ccosh complex.h ccosh, ccoshf, ccoshl - complex hyperbolic cosine functions
ccoshf complex.h ccosh, ccoshf, ccoshl - complex hyperbolic cosine functions
ccoshl complex.h ccosh, ccoshf, ccoshl - complex hyperbolic cosine functions
ccosl complex.h ccos, ccosf, ccosl - complex cosine functions
ceil math.h ceil, ceilf, ceill - ceiling value function
ceilf math.h ceil, ceilf, ceill - ceiling value function
ceill math.h ceil, ceilf, ceill - ceiling value function
cexp complex.h cexp, cexpf, cexpl - complex exponential functions
cexpf complex.h cexp, cexpf, cexpl - complex exponential functions
cexpl complex.h cexp, cexpf, cexpl - complex exponential functions
cfgetispeed termios.h cfgetispeed - get input baud rate
cfgetospeed termios.h cfgetospeed - get output baud rate
cfsetispeed termios.h cfsetispeed - set input baud rate
cfsetospeed termios.h cfsetospeed - set output baud rate
chdir unistd.h chdir - change working directory
chmod sys_stat.h chmod, fchmodat - change mode of a file relative to directory file descriptor
chown unistd.h chown, fchownat - change owner and group of a file relative to directory file descriptor
cimag complex.h cimag, cimagf, cimagl - complex imaginary functions
cimagf complex.h cimag, cimagf, cimagl - complex imaginary functions
cimagl complex.h cimag, cimagf, cimagl - complex imaginary functions
clearerr stdio.h clearerr - clear indicators on a stream
clock time.h clock - report CPU time used
clock_getcpuclockid time.h CPT clock_getcpuclockid - access a process CPU-time clock (ADVANCED REALTIME)
clock_getres time.h CX clock_getres, clock_gettime, clock_settime - clock and timer functions
clock_gettime time.h CX clock_getres, clock_gettime, clock_settime - clock and timer functions
clock_nanosleep time.h CX clock_nanosleep - high resolution sleep with specifiable clock
clock_settime time.h CX clock_getres, clock_gettime, clock_settime - clock and timer functions
clog complex.h clog, clogf, clogl - complex natural logarithm functions
clogf complex.h clog, clogf, clogl - complex natural logarithm functions
clogl complex.h clog, clogf, clogl - complex natural logarithm functions
close unistd.h close - close a file descriptor
closedir dirent.h closedir - close a directory stream
closelog syslog.h XSI closelog, openlog, setlogmask, syslog - control system log
confstr unistd.h confstr - get configurable variables
conj complex.h conj, conjf, conjl - complex conjugate functions
conjf complex.h conj, conjf, conjl - complex conjugate functions
conjl complex.h conj, conjf, conjl - complex conjugate functions
connect sys_socket.h connect - connect a socket
copysign math.h copysign, copysignf, copysignl - number manipulation function
copysignf math.h copysign, copysignf, copysignl - number manipulation function
copysignl math.h copysign, copysignf, copysignl - number manipulation function
cos math.h cos, cosf, cosl - cosine function
cosf math.h cos, cosf, cosl - cosine function
cosh math.h cosh, coshf, coshl - hyperbolic cosine functions
coshf math.h cosh, coshf, coshl - hyperbolic cosine functions
coshl math.h cosh, coshf, coshl - hyperbolic cosine functions
cosl math.h cos, cosf, cosl - cosine function
cpow complex.h cpow, cpowf, cpowl - complex power functions
cpowf complex.h cpow, cpowf, cpowl - complex power functions
cpowl complex.h cpow, cpowf, cpowl - complex power functions
cproj complex.h cproj, cprojf, cprojl - complex projection functions
cprojf complex.h cproj, cprojf, cprojl - complex projection functions
cprojl complex.h cproj, cprojf, cprojl - complex projection functions
creal complex.h creal, crealf, creall - complex real functions
crealf complex.h creal, crealf, creall - complex real functions
creall complex.h creal, crealf, creall - complex real functions
creat sys/stat.h fcntl.h OH creat - create a new file or rewrite an existing one
crypt unistd.h XSI crypt - string encoding function (CRYPT)
csin complex.h csin, csinf, csinl - complex sine functions
csinf complex.h csin, csinf, csinl - complex sine functions
csinh complex.h csinh, csinhf, csinhl - complex hyperbolic sine functions
csinhf complex.h csinh, csinhf, csinhl - complex hyperbolic sine functions
csinhl complex.h csinh, csinhf, csinhl - complex hyperbolic sine functions
csinl complex.h csin, csinf, csinl - complex sine functions
csqrt complex.h csqrt, csqrtf, csqrtl - complex square root functions
csqrtf complex.h csqrt, csqrtf, csqrtl - complex square root functions
csqrtl complex.h csqrt, csqrtf, csqrtl - complex square root functions
ctan complex.h ctan, ctanf, ctanl - complex tangent functions
ctanf complex.h ctan, ctanf, ctanl - complex tangent functions
ctanh complex.h ctanh, ctanhf, ctanhl - complex hyperbolic tangent functions
ctanhf complex.h ctanh, ctanhf, ctanhl - complex hyperbolic tangent functions
ctanhl complex.h ctanh, ctanhf, ctanhl - complex hyperbolic tangent functions
ctanl complex.h ctan, ctanf, ctanl - complex tangent functions
ctermid stdio.h CX ctermid - generate a pathname for the controlling terminal
ctime time.h OB OB CX ctime, ctime_r - convert a time value to a date and time string
ctime_r time.h OB OB CX ctime, ctime_r - convert a time value to a date and time string
daylight time.h XSI CX daylight, timezone, tzname, tzset - set timezone conversion information
dbm_clearerr ndbm.h XSI dbm_clearerr, dbm_close, dbm_delete, dbm_error, dbm_fetch, dbm_firstkey, dbm_nextkey, dbm_open, dbm_store - database functions
dbm_close ndbm.h XSI dbm_clearerr, dbm_close, dbm_delete, dbm_error, dbm_fetch, dbm_firstkey, dbm_nextkey, dbm_open, dbm_store - database functions
dbm_delete ndbm.h XSI dbm_clearerr, dbm_close, dbm_delete, dbm_error, dbm_fetch, dbm_firstkey, dbm_nextkey, dbm_open, dbm_store - database functions
dbm_error ndbm.h XSI dbm_clearerr, dbm_close, dbm_delete, dbm_error, dbm_fetch, dbm_firstkey, dbm_nextkey, dbm_open, dbm_store - database functions
dbm_fetch ndbm.h XSI dbm_clearerr, dbm_close, dbm_delete, dbm_error, dbm_fetch, dbm_firstkey, dbm_nextkey, dbm_open, dbm_store - database functions
dbm_firstkey ndbm.h XSI dbm_clearerr, dbm_close, dbm_delete, dbm_error, dbm_fetch, dbm_firstkey, dbm_nextkey, dbm_open, dbm_store - database functions
dbm_nextkey ndbm.h XSI dbm_clearerr, dbm_close, dbm_delete, dbm_error, dbm_fetch, dbm_firstkey, dbm_nextkey, dbm_open, dbm_store - database functions
dbm_open ndbm.h XSI dbm_clearerr, dbm_close, dbm_delete, dbm_error, dbm_fetch, dbm_firstkey, dbm_nextkey, dbm_open, dbm_store - database functions
dbm_store ndbm.h XSI dbm_clearerr, dbm_close, dbm_delete, dbm_error, dbm_fetch, dbm_firstkey, dbm_nextkey, dbm_open, dbm_store - database functions
difftime time.h difftime - compute the difference between two calendar time values
dirfd dirent.h dirfd - extract the file descriptor used by a DIR stream
dirname libgen.h XSI dirname - report the parent directory name of a file pathname
div stdlib.h div - compute the quotient and remainder of an integer division
dlclose dlfcn.h dlclose - close a dlopen object
dlerror dlfcn.h dlerror - get diagnostic information
dlopen dlfcn.h dlopen - gain access to an executable object file
dlsym dlfcn.h dlsym - obtain the address of a symbol from a dlopen object
dprintf stdio.h CX dprintf, fprintf, printf, snprintf, sprintf - print formatted output
drand48 stdlib.h XSI drand48, erand48, jrand48, lcong48, lrand48, mrand48, nrand48, seed48, srand48 - generate uniformly distributed pseudo-random numbers
dup unistd.h dup, dup2 - duplicate an open file descriptor
dup2 unistd.h dup, dup2 - duplicate an open file descriptor
duplocale locale.h CX duplocale - duplicate a locale object
encrypt unistd.h XSI encrypt - encoding function (CRYPT)
endgrent grp.h XSI endgrent, getgrent, setgrent - group database entry functions
endhostent netdb.h endhostent, gethostent, sethostent - network host database functions
endnetent netdb.h endnetent, getnetbyaddr, getnetbyname, getnetent, setnetent - network database functions
endprotoent netdb.h endprotoent, getprotobyname, getprotobynumber, getprotoent, setprotoent - network protocol database functions
endpwent pwd.h XSI endpwent, getpwent, setpwent - user database functions
endservent netdb.h endservent, getservbyname, getservbyport, getservent, setservent - network services database functions
endutxent utmpx.h XSI endutxent, getutxent, getutxid, getutxline, pututxline, setutxent - user accounting database functions
environ unistd.h environ, execl, execle, execlp, execv, execve, execvp, fexecve - execute a file
erand48 stdlib.h XSI drand48, erand48, jrand48, lcong48, lrand48, mrand48, nrand48, seed48, srand48 - generate uniformly distributed pseudo-random numbers
erf math.h erf, erff, erfl - error functions
erfc math.h erfc, erfcf, erfcl - complementary error functions
erfcf math.h erfc, erfcf, erfcl - complementary error functions
erfcl math.h erfc, erfcf, erfcl - complementary error functions
erff math.h erf, erff, erfl - error functions
erfl math.h erf, erff, erfl - error functions
errno errno.h errno - error return value
execl unistd.h environ, execl, execle, execlp, execv, execve, execvp, fexecve - execute a file
execle unistd.h environ, execl, execle, execlp, execv, execve, execvp, fexecve - execute a file
execlp unistd.h environ, execl, execle, execlp, execv, execve, execvp, fexecve - execute a file
execv unistd.h environ, execl, execle, execlp, execv, execve, execvp, fexecve - execute a file
execve unistd.h environ, execl, execle, execlp, execv, execve, execvp, fexecve - execute a file
execvp unistd.h environ, execl, execle, execlp, execv, execve, execvp, fexecve - execute a file
exit stdlib.h exit - terminate a process
exp math.h exp, expf, expl - exponential function
exp2 math.h exp2, exp2f, exp2l - exponential base 2 functions
exp2f math.h exp2, exp2f, exp2l - exponential base 2 functions
exp2l math.h exp2, exp2f, exp2l - exponential base 2 functions
expf math.h exp, expf, expl - exponential function
expl math.h exp, expf, expl - exponential function
expm1 math.h expm1, expm1f, expm1l - compute exponential functions
expm1f math.h expm1, expm1f, expm1l - compute exponential functions
expm1l math.h expm1, expm1f, expm1l - compute exponential functions
fabs math.h fabs, fabsf, fabsl - absolute value function
fabsf math.h fabs, fabsf, fabsl - absolute value function
fabsl math.h fabs, fabsf, fabsl - absolute value function
faccessat unistd.h access, faccessat - determine accessibility of a file relative to directory file descriptor
fchdir unistd.h fchdir - change working directory
fchmod sys_stat.h fchmod - change mode of a file
fchmodat sys_stat.h chmod, fchmodat - change mode of a file relative to directory file descriptor
fchown unistd.h fchown - change owner and group of a file
fchownat unistd.h chown, fchownat - change owner and group of a file relative to directory file descriptor
fclose stdio.h fclose - close a stream
fcntl fcntl.h fcntl - file control
fdatasync unistd.h SIO fdatasync - synchronize the data of a file (REALTIME)
fdim math.h fdim, fdimf, fdiml - compute positive difference between two floating-point numbers
fdimf math.h fdim, fdimf, fdiml - compute positive difference between two floating-point numbers
fdiml math.h fdim, fdimf, fdiml - compute positive difference between two floating-point numbers
fdopen stdio.h CX fdopen - associate a stream with a file descriptor
fdopendir dirent.h fdopendir, opendir - open directory associated with file descriptor
feclearexcept fenv.h feclearexcept - clear floating-point exception
fegetenv fenv.h fegetenv, fesetenv - get and set current floating-point environment
fegetexceptflag fenv.h fegetexceptflag, fesetexceptflag - get and set floating-point status flags
fegetround fenv.h fegetround, fesetround - get and set current rounding direction
feholdexcept fenv.h feholdexcept - save current floating-point environment
feof stdio.h feof - test end-of-file indicator on a stream
feraiseexcept fenv.h feraiseexcept - raise floating-point exception
ferror stdio.h ferror - test error indicator on a stream
fesetenv fenv.h fegetenv, fesetenv - get and set current floating-point environment
fesetexceptflag fenv.h fegetexceptflag, fesetexceptflag - get and set floating-point status flags
fesetround fenv.h fegetround, fesetround - get and set current rounding direction
fetestexcept fenv.h fetestexcept - test floating-point exception flags
feupdateenv fenv.h feupdateenv - update floating-point environment
fexecve unistd.h environ, execl, execle, execlp, execv, execve, execvp, fexecve - execute a file
fflush stdio.h fflush - flush a stream
ffs strings.h XSI ffs - find first set bit
fgetc stdio.h fgetc - get a byte from a stream
fgetpos stdio.h fgetpos - get current file position information
fgets stdio.h fgets - get a string from a stream
fgetwc stdio.h wchar.h fgetwc - get a wide-character code from a stream
fgetws stdio.h wchar.h fgetws - get a wide-character string from a stream
fileno stdio.h CX fileno - map a stream pointer to a file descriptor
flockfile stdio.h CX flockfile, ftrylockfile, funlockfile - stdio locking functions
floor math.h floor, floorf, floorl - floor function
floorf math.h floor, floorf, floorl - floor function
floorl math.h floor, floorf, floorl - floor function
fma math.h fma, fmaf, fmal - floating-point multiply-add
fmaf math.h fma, fmaf, fmal - floating-point multiply-add
fmal math.h fma, fmaf, fmal - floating-point multiply-add
fmax math.h fmax, fmaxf, fmaxl - determine maximum numeric value of two floating-point numbers
fmaxf math.h fmax, fmaxf, fmaxl - determine maximum numeric value of two floating-point numbers
fmaxl math.h fmax, fmaxf, fmaxl - determine maximum numeric value of two floating-point numbers
fmemopen stdio.h CX fmemopen - open a memory buffer stream
fmin math.h fmin, fminf, fminl - determine minimum numeric value of two floating-point numbers
fminf math.h fmin, fminf, fminl - determine minimum numeric value of two floating-point numbers
fminl math.h fmin, fminf, fminl - determine minimum numeric value of two floating-point numbers
fmod math.h fmod, fmodf, fmodl - floating-point remainder value function
fmodf math.h fmod, fmodf, fmodl - floating-point remainder value function
fmodl math.h fmod, fmodf, fmodl - floating-point remainder value function
fmtmsg fmtmsg.h XSI fmtmsg - display a message in the specified format on standard error and/or a system console
fnmatch fnmatch.h fnmatch - match a filename or a pathname
fopen stdio.h fopen - open a stream
fork unistd.h fork - create a new process
fpathconf unistd.h fpathconf, pathconf - get configurable pathname variables
fpclassify math.h fpclassify - classify real floating type
fprintf stdio.h CX dprintf, fprintf, printf, snprintf, sprintf - print formatted output
fputc stdio.h fputc - put a byte on a stream
fputs stdio.h fputs - put a string on a stream
fputwc stdio.h wchar.h fputwc - put a wide-character code on a stream
fputws stdio.h wchar.h fputws - put a wide-character string on a stream
fread stdio.h fread - binary input
free stdlib.h free - free allocated memory
freeaddrinfo sys_socket.h netdb.h freeaddrinfo, getaddrinfo - get address information
freelocale locale.h CX freelocale - free resources allocated for a locale object
freopen stdio.h freopen - open a stream
frexp math.h frexp, frexpf, frexpl - extract mantissa and exponent from a double precision number
frexpf math.h frexp, frexpf, frexpl - extract mantissa and exponent from a double precision number
frexpl math.h frexp, frexpf, frexpl - extract mantissa and exponent from a double precision number
fscanf stdio.h fscanf, scanf, sscanf - convert formatted input
fseek stdio.h CX fseek, fseeko - reposition a file-position indicator in a stream
fseeko stdio.h CX fseek, fseeko - reposition a file-position indicator in a stream
fsetpos stdio.h fsetpos - set current file position
fstat sys_stat.h fstat - get file status
fstatat sys_stat.h fstatat, lstat, stat - get file status
fstatvfs sys_statvfs.h fstatvfs, statvfs - get file system information
fsync unistd.h FSC fsync - synchronize changes to a file
ftell stdio.h CX ftell, ftello - return a file offset in a stream
ftello stdio.h CX ftell, ftello - return a file offset in a stream
ftok sys_ipc.h XSI ftok - generate an IPC key
ftruncate unistd.h ftruncate - truncate a file to a specified length
ftrylockfile stdio.h CX flockfile, ftrylockfile, funlockfile - stdio locking functions
ftw ftw.h OB XSI ftw - traverse (walk) a file tree
funlockfile stdio.h CX flockfile, ftrylockfile, funlockfile - stdio locking functions
futimens sys_stat.h sys_time.h XSI futimens, utimensat, utimes - set file access and modification times
fwide stdio.h wchar.h fwide - set stream orientation
fwprintf stdio.h wchar.h fwprintf, swprintf, wprintf - print formatted wide-character output
fwrite stdio.h fwrite - binary output
fwscanf stdio.h wchar.h fwscanf, swscanf, wscanf - convert formatted wide-character input
gai_strerror netdb.h gai_strerror - address and name information error description
getaddrinfo sys_socket.h netdb.h freeaddrinfo, getaddrinfo - get address information
getc stdio.h getc - get a byte from a stream
getc_unlocked stdio.h CX getc_unlocked, getchar_unlocked, putc_unlocked, putchar_unlocked - stdio with explicit client locking
getchar stdio.h getchar - get a byte from a .I stdin stream
getchar_unlocked stdio.h CX getc_unlocked, getchar_unlocked, putc_unlocked, putchar_unlocked - stdio with explicit client locking
getcwd unistd.h getcwd - get the pathname of the current working directory
getdate time.h XSI getdate - convert user format date and time
getdate_err time.h XSI getdate - convert user format date and time
getdelim stdio.h CX getdelim, getline - read a delimited record from .I stream
getegid unistd.h getegid - get the effective group ID
getenv stdlib.h getenv - get value of an environment variable
geteuid unistd.h geteuid - get the effective user ID
getgid unistd.h getgid - get the real group ID
getgrent grp.h XSI endgrent, getgrent, setgrent - group database entry functions
getgrgid grp.h getgrgid, getgrgid_r - get group database entry for a group ID
getgrgid_r grp.h getgrgid, getgrgid_r - get group database entry for a group ID
getgrnam grp.h getgrnam, getgrnam_r - search group database for a name
getgrnam_r grp.h getgrnam, getgrnam_r - search group database for a name
getgroups unistd.h getgroups - get supplementary group IDs
gethostent netdb.h endhostent, gethostent, sethostent - network host database functions
gethostid unistd.h XSI gethostid - get an identifier for the current host
gethostname unistd.h gethostname - get name of current host
getitimer sys_time.h OB XSI getitimer, setitimer - get and set value of interval timer
getline stdio.h CX getdelim, getline - read a delimited record from .I stream
getlogin unistd.h getlogin, getlogin_r - get login name
getlogin_r unistd.h getlogin, getlogin_r - get login name
getnameinfo sys_socket.h netdb.h getnameinfo - get name information
getnetbyaddr netdb.h endnetent, getnetbyaddr, getnetbyname, getnetent, setnetent - network database functions
getnetbyname netdb.h endnetent, getnetbyaddr, getnetbyname, getnetent, setnetent - network database functions
getnetent netdb.h endnetent, getnetbyaddr, getnetbyname, getnetent, setnetent - network database functions
getopt unistd.h getopt, optarg, opterr, optind, optopt - command option parsing
getpeername sys_socket.h getpeername - get the name of the peer socket
getpgid unistd.h getpgid - get the process group ID for a process
getpgrp unistd.h getpgrp - get the process group ID of the calling process
getpid unistd.h getpid - get the process ID
getppid unistd.h getppid - get the parent process ID
getpriority sys_resource.h XSI getpriority, setpriority - get and set the nice value
getprotobyname netdb.h endprotoent, getprotobyname, getprotobynumber, getprotoent, setprotoent - network protocol database functions
getprotobynumber netdb.h endprotoent, getprotobyname, getprotobynumber, getprotoent, setprotoent - network protocol database functions
getprotoent netdb.h endprotoent, getprotobyname, getprotobynumber, getprotoent, setprotoent - network protocol database functions
getpwent pwd.h XSI endpwent, getpwent, setpwent - user database functions
getpwnam pwd.h getpwnam, getpwnam_r - search user database for a name
getpwnam_r pwd.h getpwnam, getpwnam_r - search user database for a name
getpwuid pwd.h getpwuid, getpwuid_r - search user database for a user ID
getpwuid_r pwd.h getpwuid, getpwuid_r - search user database for a user ID
getrlimit sys_resource.h XSI getrlimit, setrlimit - control maximum resource consumption
getrusage sys_resource.h XSI getrusage - get information about resource utilization
gets stdio.h OB gets - get a string from a .I stdin stream
getservbyname netdb.h endservent, getservbyname, getservbyport, getservent, setservent - network services database functions
getservbyport netdb.h endservent, getservbyname, getservbyport, getservent, setservent - network services database functions
getservent netdb.h endservent, getservbyname, getservbyport, getservent, setservent - network services database functions
getsid unistd.h getsid - get the process group ID of a session leader
getsockname sys_socket.h getsockname - get the socket name
getsockopt sys_socket.h getsockopt - get the socket options
getsubopt stdlib.h getsubopt - parse suboption arguments from a string
gettimeofday sys_time.h OB XSI gettimeofday - get the date and time
getuid unistd.h getuid - get a real user ID
getutxent utmpx.h XSI endutxent, getutxent, getutxid, getutxline, pututxline, setutxent - user accounting database functions
getutxid utmpx.h XSI endutxent, getutxent, getutxid, getutxline, pututxline, setutxent - user accounting database functions
getutxline utmpx.h XSI endutxent, getutxent, getutxid, getutxline, pututxline, setutxent - user accounting database functions
getwc stdio.h wchar.h getwc - get a wide character from a stream
getwchar wchar.h getwchar - get a wide character from a .I stdin stream
glob glob.h glob, globfree - generate pathnames matching a pattern
globfree glob.h glob, globfree - generate pathnames matching a pattern
gmtime time.h CX gmtime, gmtime_r - convert a time value to a broken-down UTC time
gmtime_r time.h CX gmtime, gmtime_r - convert a time value to a broken-down UTC time
grantpt stdlib.h XSI grantpt - grant access to the slave pseudo-terminal device
hcreate search.h XSI hcreate, hdestroy, hsearch - manage hash search table
hdestroy search.h XSI hcreate, hdestroy, hsearch - manage hash search table
hsearch search.h XSI hcreate, hdestroy, hsearch - manage hash search table
htonl arpa_inet.h htonl, htons, ntohl, ntohs - convert values between host and network byte order
htons arpa_inet.h htonl, htons, ntohl, ntohs - convert values between host and network byte order
hypot math.h hypot, hypotf, hypotl - Euclidean distance function
hypotf math.h hypot, hypotf, hypotl - Euclidean distance function
hypotl math.h hypot, hypotf, hypotl - Euclidean distance function
iconv iconv.h iconv - codeset conversion function
iconv_close iconv.h iconv_close - codeset conversion deallocation function
iconv_open iconv.h iconv_open - codeset conversion allocation function
if_freenameindex net_if.h if_freenameindex - free memory allocated by if_nameindex
if_indextoname net_if.h if_indextoname - map a network interface index to its corresponding name
if_nameindex net_if.h if_nameindex - return all network interface names and indexes
if_nametoindex net_if.h if_nametoindex - map a network interface name to its corresponding index
ilogb math.h ilogb, ilogbf, ilogbl - return an unbiased exponent
ilogbf math.h ilogb, ilogbf, ilogbl - return an unbiased exponent
ilogbl math.h ilogb, ilogbf, ilogbl - return an unbiased exponent
imaxabs inttypes.h imaxabs - return absolute value
imaxdiv inttypes.h imaxdiv - return quotient and remainder
inet_addr arpa_inet.h inet_addr, inet_ntoa - IPv4 address manipulation
inet_ntoa arpa_inet.h inet_addr, inet_ntoa - IPv4 address manipulation
inet_ntop arpa_inet.h inet_ntop, inet_pton - convert IPv4 and IPv6 addresses between binary and text form
inet_pton arpa_inet.h inet_ntop, inet_pton - convert IPv4 and IPv6 addresses between binary and text form
initstate stdlib.h XSI initstate, random, setstate, srandom - pseudo-random number functions
insque search.h XSI insque, remque - insert or remove an element in a queue
isalnum ctype.h CX isalnum, isalnum_l - test for an alphanumeric character
isalnum_l ctype.h CX isalnum, isalnum_l - test for an alphanumeric character
isalpha ctype.h CX isalpha, isalpha_l - test for an alphabetic character
isalpha_l ctype.h CX isalpha, isalpha_l - test for an alphabetic character
isascii ctype.h OB XSI isascii - test for a 7-bit US-ASCII character
isatty unistd.h isatty - test for a terminal device
isblank ctype.h CX isblank, isblank_l - test for a blank character
isblank_l ctype.h CX isblank, isblank_l - test for a blank character
iscntrl ctype.h CX iscntrl, iscntrl_l - test for a control character
iscntrl_l ctype.h CX iscntrl, iscntrl_l - test for a control character
isdigit ctype.h CX isdigit, isdigit_l - test for a decimal digit
isdigit_l ctype.h CX isdigit, isdigit_l - test for a decimal digit
isfinite math.h isfinite - test for finite value
isgraph ctype.h CX isgraph, isgraph_l - test for a visible character
isgraph_l ctype.h CX isgraph, isgraph_l - test for a visible character
isgreater math.h isgreater - test if x greater than y
isgreaterequal math.h isgreaterequal - test if x is greater than or equal to y
isinf math.h isinf - test for infinity
isless math.h isless - test if x is less than y
islessequal math.h islessequal - test if x is less than or equal to y
islessgreater math.h islessgreater - test if x is less than or greater than y
islower ctype.h CX islower, islower_l - test for a lowercase letter
islower_l ctype.h CX islower, islower_l - test for a lowercase letter
isnan math.h isnan - test for a NaN
isnormal math.h isnormal - test for a normal value
isprint ctype.h CX isprint, isprint_l - test for a printable character
isprint_l ctype.h CX isprint, isprint_l - test for a printable character
ispunct ctype.h CX ispunct, ispunct_l - test for a punctuation character
ispunct_l ctype.h CX ispunct, ispunct_l - test for a punctuation character
isspace ctype.h CX isspace, isspace_l - test for a white-space character
isspace_l ctype.h CX isspace, isspace_l - test for a white-space character
isunordered math.h isunordered - test if arguments are unordered
isupper ctype.h CX isupper, isupper_l - test for an uppercase letter
isupper_l ctype.h CX isupper, isupper_l - test for an uppercase letter
iswalnum wctype.h CX iswalnum, iswalnum_l - test for an alphanumeric wide-character code
iswalnum_l wctype.h CX iswalnum, iswalnum_l - test for an alphanumeric wide-character code
iswalpha wctype.h CX iswalpha, iswalpha_l - test for an alphabetic wide-character code
iswalpha_l wctype.h CX iswalpha, iswalpha_l - test for an alphabetic wide-character code
iswblank wctype.h CX iswblank, iswblank_l - test for a blank wide-character code
iswblank_l wctype.h CX iswblank, iswblank_l - test for a blank wide-character code
iswcntrl wctype.h CX iswcntrl, iswcntrl_l - test for a control wide-character code
iswcntrl_l wctype.h CX iswcntrl, iswcntrl_l - test for a control wide-character code
iswctype wctype.h CX iswctype, iswctype_l - test character for a specified class
iswctype_l wctype.h CX iswctype, iswctype_l - test character for a specified class
iswdigit wctype.h CX iswdigit, iswdigit_l - test for a decimal digit wide-character code
iswdigit_l wctype.h CX iswdigit, iswdigit_l - test for a decimal digit wide-character code
iswgraph wctype.h CX iswgraph, iswgraph_l - test for a visible wide-character code
iswgraph_l wctype.h CX iswgraph, iswgraph_l - test for a visible wide-character code
iswlower wctype.h CX iswlower, iswlower_l - test for a lowercase letter wide-character code
iswlower_l wctype.h CX iswlower, iswlower_l - test for a lowercase letter wide-character code
iswprint wctype.h CX iswprint, iswprint_l - test for a printable wide-character code
iswprint_l wctype.h CX iswprint, iswprint_l - test for a printable wide-character code
iswpunct wctype.h CX iswpunct, iswpunct_l - test for a punctuation wide-character code
iswpunct_l wctype.h CX iswpunct, iswpunct_l - test for a punctuation wide-character code
iswspace wctype.h CX iswspace, iswspace_l - test for a white-space wide-character code
iswspace_l wctype.h CX iswspace, iswspace_l - test for a white-space wide-character code
iswupper wctype.h CX iswupper, iswupper_l - test for an uppercase letter wide-character code
iswupper_l wctype.h CX iswupper, iswupper_l - test for an uppercase letter wide-character code
iswxdigit wctype.h CX iswxdigit, iswxdigit_l - test for a hexadecimal digit wide-character code
iswxdigit_l wctype.h CX iswxdigit, iswxdigit_l - test for a hexadecimal digit wide-character code
isxdigit ctype.h CX isxdigit, isxdigit_l - test for a hexadecimal digit
isxdigit_l ctype.h CX isxdigit, isxdigit_l - test for a hexadecimal digit
j0 math.h XSI j0, j1, jn - Bessel functions of the first kind
j1 math.h XSI j0, j1, jn - Bessel functions of the first kind
jn math.h XSI j0, j1, jn - Bessel functions of the first kind
jrand48 stdlib.h XSI drand48, erand48, jrand48, lcong48, lrand48, mrand48, nrand48, seed48, srand48 - generate uniformly distributed pseudo-random numbers
kill signal.h CX kill - send a signal to a process or a group of processes
killpg signal.h XSI killpg - send a signal to a process group
l64a stdlib.h XSI a64l, l64a - convert between a 32-bit integer and a radix-64 ASCII string
labs stdlib.h labs, llabs - return a long integer absolute value
lchown unistd.h lchown - change the owner and group of a symbolic link
lcong48 stdlib.h XSI drand48, erand48, jrand48, lcong48, lrand48, mrand48, nrand48, seed48, srand48 - generate uniformly distributed pseudo-random numbers
ldexp math.h ldexp, ldexpf, ldexpl - load exponent of a floating-point number
ldexpf math.h ldexp, ldexpf, ldexpl - load exponent of a floating-point number
ldexpl math.h ldexp, ldexpf, ldexpl - load exponent of a floating-point number
ldiv stdlib.h ldiv, lldiv - compute quotient and remainder of a long division
lfind search.h XSI lsearch, lfind - linear search and update
lgamma math.h XSI lgamma, lgammaf, lgammal, signgam - log gamma function
lgammaf math.h XSI lgamma, lgammaf, lgammal, signgam - log gamma function
lgammal math.h XSI lgamma, lgammaf, lgammal, signgam - log gamma function
link unistd.h link, linkat - link one file to another file relative to two directory file descriptors
linkat unistd.h link, linkat - link one file to another file relative to two directory file descriptors
lio_listio aio.h lio_listio - list directed I/O
listen sys_socket.h listen - listen for socket connections and limit the queue of incoming connections
llabs stdlib.h labs, llabs - return a long integer absolute value
lldiv stdlib.h ldiv, lldiv - compute quotient and remainder of a long division
llrint math.h llrint, llrintf, llrintl - round to the nearest integer value using current rounding direction
llrintf math.h llrint, llrintf, llrintl - round to the nearest integer value using current rounding direction
llrintl math.h llrint, llrintf, llrintl - round to the nearest integer value using current rounding direction
llround math.h llround, llroundf, llroundl - round to nearest integer value
llroundf math.h llround, llroundf, llroundl - round to nearest integer value
llroundl math.h llround, llroundf, llroundl - round to nearest integer value
localeconv locale.h localeconv - return locale-specific information
localtime time.h CX localtime, localtime_r - convert a time value to a broken-down local time
localtime_r time.h CX localtime, localtime_r - convert a time value to a broken-down local time
lockf unistd.h XSI lockf - record locking on files
log math.h log, logf, logl - natural logarithm function
log10 math.h log10, log10f, log10l - base 10 logarithm function
log10f math.h log10, log10f, log10l - base 10 logarithm function
log10l math.h log10, log10f, log10l - base 10 logarithm function
log1p math.h log1p, log1pf, log1pl - compute a natural logarithm
log1pf math.h log1p, log1pf, log1pl - compute a natural logarithm
log1pl math.h log1p, log1pf, log1pl - compute a natural logarithm
log2 math.h log2, log2f, log2l - compute base 2 logarithm functions
log2f math.h log2, log2f, log2l - compute base 2 logarithm functions
log2l math.h log2, log2f, log2l - compute base 2 logarithm functions
logb math.h logb, logbf, logbl - radix-independent exponent
logbf math.h logb, logbf, logbl - radix-independent exponent
logbl math.h logb, logbf, logbl - radix-independent exponent
logf math.h log, logf, logl - natural logarithm function
logl math.h log, logf, logl - natural logarithm function
longjmp setjmp.h longjmp - non-local goto
lrand48 stdlib.h XSI drand48, erand48, jrand48, lcong48, lrand48, mrand48, nrand48, seed48, srand48 - generate uniformly distributed pseudo-random numbers
lrint math.h lrint, lrintf, lrintl - round to nearest integer value using current rounding direction
lrintf math.h lrint, lrintf, lrintl - round to nearest integer value using current rounding direction
lrintl math.h lrint, lrintf, lrintl - round to nearest integer value using current rounding direction
lround math.h lround, lroundf, lroundl - round to nearest integer value
lroundf math.h lround, lroundf, lroundl - round to nearest integer value
lroundl math.h lround, lroundf, lroundl - round to nearest integer value
lsearch search.h XSI lsearch, lfind - linear search and update
lseek unistd.h lseek - move the read/write file offset
lstat sys_stat.h fstatat, lstat, stat - get file status
malloc stdlib.h malloc - a memory allocator
mblen stdlib.h mblen - get number of bytes in a character
mbrlen wchar.h mbrlen - get number of bytes in a character (restartable)
mbrtowc wchar.h mbrtowc - convert a character to a wide-character code (restartable)
mbsinit wchar.h mbsinit - determine conversion object status
mbsnrtowcs wchar.h CX mbsnrtowcs, mbsrtowcs - convert a character string to a wide-character string (restartable)
mbsrtowcs wchar.h CX mbsnrtowcs, mbsrtowcs - convert a character string to a wide-character string (restartable)
mbstowcs stdlib.h mbstowcs - convert a character string to a wide-character string
mbtowc stdlib.h mbtowc - convert a character to a wide-character code
memccpy string.h XSI memccpy - copy bytes in memory
memchr string.h memchr - find byte in memory
memcmp string.h memcmp - compare bytes in memory
memcpy string.h memcpy - copy bytes in memory
memmove string.h memmove - copy bytes in memory with overlapping areas
memset string.h memset - set bytes in memory
mkdir sys_stat.h mkdir, mkdirat - make a directory relative to directory file descriptor
mkdirat sys_stat.h mkdir, mkdirat - make a directory relative to directory file descriptor
mkdtemp stdlib.h CX mkdtemp, mkstemp - create a unique directory or file
mkfifo sys_stat.h mkfifo, mkfifoat - make a FIFO special file relative to directory file descriptor
mkfifoat sys_stat.h mkfifo, mkfifoat - make a FIFO special file relative to directory file descriptor
mknod sys_stat.h XSI mknod, mknodat - make directory, special file, or regular file
mknodat sys_stat.h XSI mknod, mknodat - make directory, special file, or regular file
mkstemp stdlib.h CX mkdtemp, mkstemp - create a unique directory or file
mktime time.h mktime - convert broken-down time into time since the Epoch
mlock sys_mman.h MLR mlock, munlock - lock or unlock a range of process address space (REALTIME)
mlockall sys_mman.h ML mlockall, munlockall - lock/unlock the address space of a process (REALTIME)
mmap sys_mman.h mmap - map pages of memory
modf math.h modf, modff, modfl - decompose a floating-point number
modff math.h modf, modff, modfl - decompose a floating-point number
modfl math.h modf, modff, modfl - decompose a floating-point number
mprotect sys_mman.h mprotect - set protection of memory mapping
mq_close mqueue.h MSG mq_close - close a message queue (REALTIME)
mq_getattr mqueue.h MSG mq_getattr - get message queue attributes (REALTIME)
mq_notify mqueue.h MSG mq_notify - notify process that a message is available (REALTIME)
mq_open mqueue.h MSG mq_open - open a message queue (REALTIME)
mq_receive mqueue.h mqueue.h time.h MSG mq_receive, mq_timedreceive - receive a message from a message queue (REALTIME)
mq_send mqueue.h mqueue.h time.h MSG mq_send, mq_timedsend - send a message to a message queue (REALTIME)
mq_setattr mqueue.h MSG mq_setattr - set message queue attributes (REALTIME)
mq_timedreceive mqueue.h mqueue.h time.h MSG mq_receive, mq_timedreceive - receive a message from a message queue (REALTIME)
mq_timedsend mqueue.h mqueue.h time.h MSG mq_send, mq_timedsend - send a message to a message queue (REALTIME)
mq_unlink mqueue.h MSG mq_unlink - remove a message queue (REALTIME)
mrand48 stdlib.h XSI drand48, erand48, jrand48, lcong48, lrand48, mrand48, nrand48, seed48, srand48 - generate uniformly distributed pseudo-random numbers
msgctl sys_msg.h XSI msgctl - XSI message control operations
msgget sys_msg.h XSI msgget - get the XSI message queue identifier
msgrcv sys_msg.h XSI msgrcv - XSI message receive operation
msgsnd sys_msg.h XSI msgsnd - XSI message send operation
msync sys_mman.h XSI msync - synchronize memory with physical storage
munlock sys_mman.h MLR mlock, munlock - lock or unlock a range of process address space (REALTIME)
munlockall sys_mman.h ML mlockall, munlockall - lock/unlock the address space of a process (REALTIME)
munmap sys_mman.h munmap - unmap pages of memory
nan math.h nan, nanf, nanl - return quiet NaN
nanf math.h nan, nanf, nanl - return quiet NaN
nanl math.h nan, nanf, nanl - return quiet NaN
nanosleep time.h CX nanosleep - high resolution sleep
nearbyint math.h nearbyint, nearbyintf, nearbyintl - floating-point rounding functions
nearbyintf math.h nearbyint, nearbyintf, nearbyintl - floating-point rounding functions
nearbyintl math.h nearbyint, nearbyintf, nearbyintl - floating-point rounding functions
newlocale locale.h CX newlocale - create or modify a locale object
nextafter math.h nextafter, nextafterf, nextafterl, nexttoward, nexttowardf, nexttowardl - next representable floating-point number
nextafterf math.h nextafter, nextafterf, nextafterl, nexttoward, nexttowardf, nexttowardl - next representable floating-point number
nextafterl math.h nextafter, nextafterf, nextafterl, nexttoward, nexttowardf, nexttowardl - next representable floating-point number
nexttoward math.h nextafter, nextafterf, nextafterl, nexttoward, nexttowardf, nexttowardl - next representable floating-point number
nexttowardf math.h nextafter, nextafterf, nextafterl, nexttoward, nexttowardf, nexttowardl - next representable floating-point number
nexttowardl math.h nextafter, nextafterf, nextafterl, nexttoward, nexttowardf, nexttowardl - next representable floating-point number
nftw ftw.h XSI nftw - walk a file tree
nice unistd.h XSI nice - change the nice value of a process
nl_langinfo langinfo.h nl_langinfo, nl_langinfo_l - language information
nl_langinfo_l langinfo.h nl_langinfo, nl_langinfo_l - language information
nrand48 stdlib.h XSI drand48, erand48, jrand48, lcong48, lrand48, mrand48, nrand48, seed48, srand48 - generate uniformly distributed pseudo-random numbers
ntohl arpa_inet.h htonl, htons, ntohl, ntohs - convert values between host and network byte order
ntohs arpa_inet.h htonl, htons, ntohl, ntohs - convert values between host and network byte order
open sys/stat.h fcntl.h OH open, openat - open file relative to directory file descriptor
open_memstream stdio.h wchar.h CX open_memstream, open_wmemstream - open a dynamic memory buffer stream
open_wmemstream stdio.h wchar.h CX open_memstream, open_wmemstream - open a dynamic memory buffer stream
openat sys/stat.h fcntl.h OH open, openat - open file relative to directory file descriptor
opendir dirent.h fdopendir, opendir - open directory associated with file descriptor
openlog syslog.h XSI closelog, openlog, setlogmask, syslog - control system log
optarg unistd.h getopt, optarg, opterr, optind, optopt - command option parsing
opterr unistd.h getopt, optarg, opterr, optind, optopt - command option parsing
optind unistd.h getopt, optarg, opterr, optind, optopt - command option parsing
optopt unistd.h getopt, optarg, opterr, optind, optopt - command option parsing
pathconf unistd.h fpathconf, pathconf - get configurable pathname variables
pause unistd.h pause - suspend the thread until a signal is received
pclose stdio.h CX pclose - close a pipe stream to or from a process
perror stdio.h perror - write error messages to standard error
pipe unistd.h pipe - create an interprocess channel
poll poll.h poll - input/output multiplexing
popen stdio.h CX popen - initiate pipe streams to or from a process
posix_fadvise fcntl.h ADV posix_fadvise - file advisory information (ADVANCED REALTIME)
posix_fallocate fcntl.h ADV posix_fallocate - file space control (ADVANCED REALTIME)
posix_madvise sys_mman.h ADV posix_madvise - memory advisory information and alignment control (ADVANCED REALTIME)
posix_mem_offset sys_mman.h TYM posix_mem_offset - find offset and length of a mapped typed memory block (ADVANCED REALTIME)
posix_memalign stdlib.h ADV posix_memalign - aligned memory allocation (ADVANCED REALTIME)
posix_openpt stdlib.h fcntl.h XSI posix_openpt - open a pseudo-terminal device
posix_spawn spawn.h SPN posix_spawn, posix_spawnp - spawn a process (ADVANCED REALTIME)
posix_spawn_file_actions_addclose spawn.h SPN posix_spawn_file_actions_addclose, posix_spawn_file_actions_addopen - add close or open action to spawn file actions object (ADVANCED REALTIME)
posix_spawn_file_actions_adddup2 spawn.h SPN posix_spawn_file_actions_adddup2 - add dup2 action to spawn file actions object (ADVANCED REALTIME)
posix_spawn_file_actions_addopen spawn.h SPN posix_spawn_file_actions_addclose, posix_spawn_file_actions_addopen - add close or open action to spawn file actions object (ADVANCED REALTIME)
posix_spawn_file_actions_destroy spawn.h SPN posix_spawn_file_actions_destroy, posix_spawn_file_actions_init - destroy and initialize spawn file actions object (ADVANCED REALTIME)
posix_spawn_file_actions_init spawn.h SPN posix_spawn_file_actions_destroy, posix_spawn_file_actions_init - destroy and initialize spawn file actions object (ADVANCED REALTIME)
posix_spawnattr_destroy spawn.h SPN posix_spawnattr_destroy, posix_spawnattr_init - destroy and initialize spawn attributes object (ADVANCED REALTIME)
posix_spawnattr_getflags spawn.h SPN posix_spawnattr_getflags, posix_spawnattr_setflags - get and set the spawn-flags attribute of a spawn attributes object (ADVANCED REALTIME)
posix_spawnattr_getpgroup spawn.h SPN posix_spawnattr_getpgroup, posix_spawnattr_setpgroup - get and set the spawn-pgroup attribute of a spawn attributes object (ADVANCED REALTIME)
posix_spawnattr_getschedparam spawn.h sched.h SPN PS posix_spawnattr_getschedparam, posix_spawnattr_setschedparam - get and set the spawn-schedparam attribute of a spawn attributes object (ADVANCED REALTIME)
posix_spawnattr_getschedpolicy spawn.h sched.h SPN PS posix_spawnattr_getschedpolicy, posix_spawnattr_setschedpolicy - get and set the spawn-schedpolicy attribute of a spawn attributes object (ADVANCED REALTIME)
posix_spawnattr_getsigdefault signal.h spawn.h SPN posix_spawnattr_getsigdefault, posix_spawnattr_setsigdefault - get and set the spawn-sigdefault attribute of a spawn attributes object (ADVANCED REALTIME)
posix_spawnattr_getsigmask signal.h spawn.h SPN posix_spawnattr_getsigmask, posix_spawnattr_setsigmask - get and set the spawn-sigmask attribute of a spawn attributes object (ADVANCED REALTIME)
posix_spawnattr_init spawn.h SPN posix_spawnattr_destroy, posix_spawnattr_init - destroy and initialize spawn attributes object (ADVANCED REALTIME)
posix_spawnattr_setflags spawn.h SPN posix_spawnattr_getflags, posix_spawnattr_setflags - get and set the spawn-flags attribute of a spawn attributes object (ADVANCED REALTIME)
posix_spawnattr_setpgroup spawn.h SPN posix_spawnattr_getpgroup, posix_spawnattr_setpgroup - get and set the spawn-pgroup attribute of a spawn attributes object (ADVANCED REALTIME)
posix_spawnattr_setschedparam spawn.h sched.h SPN PS posix_spawnattr_getschedparam, posix_spawnattr_setschedparam - get and set the spawn-schedparam attribute of a spawn attributes object (ADVANCED REALTIME)
posix_spawnattr_setschedpolicy spawn.h sched.h SPN PS posix_spawnattr_getschedpolicy, posix_spawnattr_setschedpolicy - get and set the spawn-schedpolicy attribute of a spawn attributes object (ADVANCED REALTIME)
posix_spawnattr_setsigdefault signal.h spawn.h SPN posix_spawnattr_getsigdefault, posix_spawnattr_setsigdefault - get and set the spawn-sigdefault attribute of a spawn attributes object (ADVANCED REALTIME)
posix_spawnattr_setsigmask signal.h spawn.h SPN posix_spawnattr_getsigmask, posix_spawnattr_setsigmask - get and set the spawn-sigmask attribute of a spawn attributes object (ADVANCED REALTIME)
posix_spawnp spawn.h SPN posix_spawn, posix_spawnp - spawn a process (ADVANCED REALTIME)
posix_typed_mem_get_info sys_mman.h TYM posix_typed_mem_get_info - query typed memory information (ADVANCED REALTIME)
posix_typed_mem_open sys_mman.h TYM posix_typed_mem_open - open a typed memory object (ADVANCED REALTIME)
pow math.h pow, powf, powl - power function
powf math.h pow, powf, powl - power function
powl math.h pow, powf, powl - power function
pread unistd.h pread, read - read from a file
printf stdio.h CX dprintf, fprintf, printf, snprintf, sprintf - print formatted output
pselect sys_select.h pselect, select - synchronous I/O multiplexing
psiginfo signal.h CX psiginfo, psignal - print signal information to standard error
psignal signal.h CX psiginfo, psignal - print signal information to standard error
pthread_atfork pthread.h pthread_atfork - register fork handlers
pthread_attr_destroy pthread.h pthread_attr_destroy, pthread_attr_init - destroy and initialize the thread attributes object
pthread_attr_getdetachstate pthread.h pthread_attr_getdetachstate, pthread_attr_setdetachstate - get and set the detachstate attribute
pthread_attr_getguardsize pthread.h pthread_attr_getguardsize, pthread_attr_setguardsize - get and set the thread guardsize attribute
pthread_attr_getinheritsched pthread.h TPS pthread_attr_getinheritsched, pthread_attr_setinheritsched - get and set the inheritsched attribute (REALTIME THREADS)
pthread_attr_getschedparam pthread.h pthread_attr_getschedparam, pthread_attr_setschedparam - get and set the schedparam attribute
pthread_attr_getschedpolicy pthread.h TPS pthread_attr_getschedpolicy, pthread_attr_setschedpolicy - get and set the schedpolicy attribute (REALTIME THREADS)
pthread_attr_getscope pthread.h TPS pthread_attr_getscope, pthread_attr_setscope - get and set the contentionscope attribute (REALTIME THREADS)
pthread_attr_getstack pthread.h TSA TSS pthread_attr_getstack, pthread_attr_setstack - get and set stack attributes
pthread_attr_getstacksize pthread.h TSS pthread_attr_getstacksize, pthread_attr_setstacksize - get and set the stacksize attribute
pthread_attr_init pthread.h pthread_attr_destroy, pthread_attr_init - destroy and initialize the thread attributes object
pthread_attr_setdetachstate pthread.h pthread_attr_getdetachstate, pthread_attr_setdetachstate - get and set the detachstate attribute
pthread_attr_setguardsize pthread.h pthread_attr_getguardsize, pthread_attr_setguardsize - get and set the thread guardsize attribute
pthread_attr_setinheritsched pthread.h TPS pthread_attr_getinheritsched, pthread_attr_setinheritsched - get and set the inheritsched attribute (REALTIME THREADS)
pthread_attr_setschedparam pthread.h pthread_attr_getschedparam, pthread_attr_setschedparam - get and set the schedparam attribute
pthread_attr_setschedpolicy pthread.h TPS pthread_attr_getschedpolicy, pthread_attr_setschedpolicy - get and set the schedpolicy attribute (REALTIME THREADS)
pthread_attr_setscope pthread.h TPS pthread_attr_getscope, pthread_attr_setscope - get and set the contentionscope attribute (REALTIME THREADS)
pthread_attr_setstack pthread.h TSA TSS pthread_attr_getstack, pthread_attr_setstack - get and set stack attributes
pthread_attr_setstacksize pthread.h TSS pthread_attr_getstacksize, pthread_attr_setstacksize - get and set the stacksize attribute
pthread_barrier_destroy pthread.h pthread_barrier_destroy, pthread_barrier_init - destroy and initialize a barrier object
pthread_barrier_init pthread.h pthread_barrier_destroy, pthread_barrier_init - destroy and initialize a barrier object
pthread_barrier_wait pthread.h pthread_barrier_wait - synchronize at a barrier
pthread_barrierattr_destroy pthread.h pthread_barrierattr_destroy, pthread_barrierattr_init - destroy and initialize the barrier attributes object
pthread_barrierattr_getpshared pthread.h TSH pthread_barrierattr_getpshared, pthread_barrierattr_setpshared - get and set the process-shared attribute of the barrier attributes object
pthread_barrierattr_init pthread.h pthread_barrierattr_destroy, pthread_barrierattr_init - destroy and initialize the barrier attributes object
pthread_barrierattr_setpshared pthread.h TSH pthread_barrierattr_getpshared, pthread_barrierattr_setpshared - get and set the process-shared attribute of the barrier attributes object
pthread_cancel pthread.h pthread_cancel - cancel execution of a thread
pthread_cleanup_pop pthread.h pthread_cleanup_pop, pthread_cleanup_push - establish cancellation handlers
pthread_cleanup_push pthread.h pthread_cleanup_pop, pthread_cleanup_push - establish cancellation handlers
pthread_cond_broadcast pthread.h pthread_cond_broadcast, pthread_cond_signal - broadcast or signal a condition
pthread_cond_destroy pthread.h pthread_cond_destroy, pthread_cond_init - destroy and initialize condition variables
pthread_cond_init pthread.h pthread_cond_destroy, pthread_cond_init - destroy and initialize condition variables
pthread_cond_signal pthread.h pthread_cond_broadcast, pthread_cond_signal - broadcast or signal a condition
pthread_cond_timedwait pthread.h pthread_cond_timedwait, pthread_cond_wait - wait on a condition
pthread_cond_wait pthread.h pthread_cond_timedwait, pthread_cond_wait - wait on a condition
pthread_condattr_destroy pthread.h pthread_condattr_destroy, pthread_condattr_init - destroy and initialize the condition variable attributes object
pthread_condattr_getclock pthread.h pthread_condattr_getclock, pthread_condattr_setclock - get and set the clock selection condition variable attribute
pthread_condattr_getpshared pthread.h TSH pthread_condattr_getpshared, pthread_condattr_setpshared - get and set the process-shared condition variable attributes
pthread_condattr_init pthread.h pthread_condattr_destroy, pthread_condattr_init - destroy and initialize the condition variable attributes object
pthread_condattr_setclock pthread.h pthread_condattr_getclock, pthread_condattr_setclock - get and set the clock selection condition variable attribute
pthread_condattr_setpshared pthread.h TSH pthread_condattr_getpshared, pthread_condattr_setpshared - get and set the process-shared condition variable attributes
pthread_create pthread.h pthread_create - thread creation
pthread_detach pthread.h pthread_detach - detach a thread
pthread_equal pthread.h pthread_equal - compare thread IDs
pthread_exit pthread.h pthread_exit - thread termination
pthread_getconcurrency pthread.h OB XSI pthread_getconcurrency, pthread_setconcurrency - get and set the level of concurrency
pthread_getcpuclockid pthread.h time.h TCT pthread_getcpuclockid - access a thread CPU-time clock (ADVANCED REALTIME THREADS)
pthread_getschedparam pthread.h TPS pthread_getschedparam, pthread_setschedparam - dynamic thread scheduling parameters access (REALTIME THREADS)
pthread_getspecific pthread.h pthread_getspecific, pthread_setspecific - thread-specific data management
pthread_join pthread.h pthread_join - wait for thread termination
pthread_key_create pthread.h pthread_key_create - thread-specific data key creation
pthread_key_delete pthread.h pthread_key_delete - thread-specific data key deletion
pthread_kill signal.h CX pthread_kill - send a signal to a thread
pthread_mutex_consistent pthread.h pthread_mutex_consistent - mark state protected by robust mutex as consistent
pthread_mutex_destroy pthread.h pthread_mutex_destroy, pthread_mutex_init - destroy and initialize a mutex
pthread_mutex_getprioceiling pthread.h RPP pthread_mutex_getprioceiling, pthread_mutex_setprioceiling - get and set the priority ceiling of a mutex (REALTIME THREADS)
pthread_mutex_init pthread.h pthread_mutex_destroy, pthread_mutex_init - destroy and initialize a mutex
pthread_mutex_lock pthread.h pthread_mutex_lock, pthread_mutex_trylock, pthread_mutex_unlock - lock and unlock a mutex
pthread_mutex_setprioceiling pthread.h RPP pthread_mutex_getprioceiling, pthread_mutex_setprioceiling - get and set the priority ceiling of a mutex (REALTIME THREADS)
pthread_mutex_timedlock pthread.h time.h pthread_mutex_timedlock - lock a mutex
pthread_mutex_trylock pthread.h pthread_mutex_lock, pthread_mutex_trylock, pthread_mutex_unlock - lock and unlock a mutex
pthread_mutex_unlock pthread.h pthread_mutex_lock, pthread_mutex_trylock, pthread_mutex_unlock - lock and unlock a mutex
pthread_mutexattr_destroy pthread.h pthread_mutexattr_destroy, pthread_mutexattr_init - destroy and initialize the mutex attributes object
pthread_mutexattr_getprioceiling pthread.h RPP pthread_mutexattr_getprioceiling, pthread_mutexattr_setprioceiling - get and set the prioceiling attribute of the mutex attributes object (REALTIME THREADS)
pthread_mutexattr_getprotocol pthread.h MC1 pthread_mutexattr_getprotocol, pthread_mutexattr_setprotocol - get and set the protocol attribute of the mutex attributes object (REALTIME THREADS)
pthread_mutexattr_getpshared pthread.h TSH pthread_mutexattr_getpshared, pthread_mutexattr_setpshared - get and set the process-shared attribute
pthread_mutexattr_getrobust pthread.h pthread_mutexattr_getrobust, pthread_mutexattr_setrobust - get and set the mutex robust attribute
pthread_mutexattr_gettype pthread.h pthread_mutexattr_gettype, pthread_mutexattr_settype - get and set the mutex type attribute
pthread_mutexattr_init pthread.h pthread_mutexattr_destroy, pthread_mutexattr_init - destroy and initialize the mutex attributes object
pthread_mutexattr_setprioceiling pthread.h RPP pthread_mutexattr_getprioceiling, pthread_mutexattr_setprioceiling - get and set the prioceiling attribute of the mutex attributes object (REALTIME THREADS)
pthread_mutexattr_setprotocol pthread.h MC1 pthread_mutexattr_getprotocol, pthread_mutexattr_setprotocol - get and set the protocol attribute of the mutex attributes object (REALTIME THREADS)
pthread_mutexattr_setpshared pthread.h TSH pthread_mutexattr_getpshared, pthread_mutexattr_setpshared - get and set the process-shared attribute
pthread_mutexattr_setrobust pthread.h pthread_mutexattr_getrobust, pthread_mutexattr_setrobust - get and set the mutex robust attribute
pthread_mutexattr_settype pthread.h pthread_mutexattr_gettype, pthread_mutexattr_settype - get and set the mutex type attribute
pthread_once pthread.h pthread_once - dynamic package initialization
pthread_rwlock_destroy pthread.h pthread_rwlock_destroy, pthread_rwlock_init - destroy and initialize a read-write lock object
pthread_rwlock_init pthread.h pthread_rwlock_destroy, pthread_rwlock_init - destroy and initialize a read-write lock object
pthread_rwlock_rdlock pthread.h pthread_rwlock_rdlock, pthread_rwlock_tryrdlock - lock a read-write lock object for reading
pthread_rwlock_timedrdlock pthread.h time.h pthread_rwlock_timedrdlock - lock a read-write lock for reading
pthread_rwlock_timedwrlock pthread.h time.h pthread_rwlock_timedwrlock - lock a read-write lock for writing
pthread_rwlock_tryrdlock pthread.h pthread_rwlock_rdlock, pthread_rwlock_tryrdlock - lock a read-write lock object for reading
pthread_rwlock_trywrlock pthread.h pthread_rwlock_trywrlock, pthread_rwlock_wrlock - lock a read-write lock object for writing
pthread_rwlock_unlock pthread.h pthread_rwlock_unlock - unlock a read-write lock object
pthread_rwlock_wrlock pthread.h pthread_rwlock_trywrlock, pthread_rwlock_wrlock - lock a read-write lock object for writing
pthread_rwlockattr_destroy pthread.h pthread_rwlockattr_destroy, pthread_rwlockattr_init - destroy and initialize the read-write lock attributes object
pthread_rwlockattr_getpshared pthread.h TSH pthread_rwlockattr_getpshared, pthread_rwlockattr_setpshared - get and set the process-shared attribute of the read-write lock attributes object
pthread_rwlockattr_init pthread.h pthread_rwlockattr_destroy, pthread_rwlockattr_init - destroy and initialize the read-write lock attributes object
pthread_rwlockattr_setpshared pthread.h TSH pthread_rwlockattr_getpshared, pthread_rwlockattr_setpshared - get and set the process-shared attribute of the read-write lock attributes object
pthread_self pthread.h pthread_self - get the calling thread ID
pthread_setcancelstate pthread.h pthread_setcancelstate, pthread_setcanceltype, pthread_testcancel - set cancelability state
pthread_setcanceltype pthread.h pthread_setcancelstate, pthread_setcanceltype, pthread_testcancel - set cancelability state
pthread_setconcurrency pthread.h OB XSI pthread_getconcurrency, pthread_setconcurrency - get and set the level of concurrency
pthread_setschedparam pthread.h TPS pthread_getschedparam, pthread_setschedparam - dynamic thread scheduling parameters access (REALTIME THREADS)
pthread_setschedprio pthread.h TPS pthread_setschedprio - dynamic thread scheduling parameters access (REALTIME THREADS)
pthread_setspecific pthread.h pthread_getspecific, pthread_setspecific - thread-specific data management
pthread_sigmask signal.h CX pthread_sigmask, sigprocmask - examine and change blocked signals
pthread_spin_destroy pthread.h pthread_spin_destroy, pthread_spin_init - destroy or initialize a spin lock object
pthread_spin_init pthread.h pthread_spin_destroy, pthread_spin_init - destroy or initialize a spin lock object
pthread_spin_lock pthread.h pthread_spin_lock, pthread_spin_trylock - lock a spin lock object
pthread_spin_trylock pthread.h pthread_spin_lock, pthread_spin_trylock - lock a spin lock object
pthread_spin_unlock pthread.h pthread_spin_unlock - unlock a spin lock object
pthread_testcancel pthread.h pthread_setcancelstate, pthread_setcanceltype, pthread_testcancel - set cancelability state
ptsname stdlib.h XSI ptsname - get name of the slave pseudo-terminal device
putc stdio.h putc - put a byte on a stream
putc_unlocked stdio.h CX getc_unlocked, getchar_unlocked, putc_unlocked, putchar_unlocked - stdio with explicit client locking
putchar stdio.h putchar - put a byte on a stdout stream
putchar_unlocked stdio.h CX getc_unlocked, getchar_unlocked, putc_unlocked, putchar_unlocked - stdio with explicit client locking
putenv stdlib.h XSI putenv - change or add a value to an environment
puts stdio.h puts - put a string on standard output
pututxline utmpx.h XSI endutxent, getutxent, getutxid, getutxline, pututxline, setutxent - user accounting database functions
putwc stdio.h wchar.h putwc - put a wide character on a stream
putwchar wchar.h putwchar - put a wide character on a stdout stream
pwrite unistd.h pwrite, write - write on a file
qsort stdlib.h qsort - sort a table of data
raise signal.h raise - send a signal to the executing process
rand stdlib.h OB CX rand, rand_r, srand - pseudo-random number generator
rand_r stdlib.h OB CX rand, rand_r, srand - pseudo-random number generator
random stdlib.h XSI initstate, random, setstate, srandom - pseudo-random number functions
read unistd.h pread, read - read from a file
readdir dirent.h readdir, readdir_r - read a directory
readdir_r dirent.h readdir, readdir_r - read a directory
readlink unistd.h readlink, readlinkat - read the contents of a symbolic link relative to a directory file descriptor
readlinkat unistd.h readlink, readlinkat - read the contents of a symbolic link relative to a directory file descriptor
readv sys_uio.h XSI readv - read a vector
realloc stdlib.h realloc - memory reallocator
realpath stdlib.h XSI realpath - resolve a pathname
recv sys_socket.h recv - receive a message from a connected socket
recvfrom sys_socket.h recvfrom - receive a message from a socket
recvmsg sys_socket.h recvmsg - receive a message from a socket
regcomp regex.h regcomp, regerror, regexec, regfree - regular expression matching
regerror regex.h regcomp, regerror, regexec, regfree - regular expression matching
regexec regex.h regcomp, regerror, regexec, regfree - regular expression matching
regfree regex.h regcomp, regerror, regexec, regfree - regular expression matching
remainder math.h remainder, remainderf, remainderl - remainder function
remainderf math.h remainder, remainderf, remainderl - remainder function
remainderl math.h remainder, remainderf, remainderl - remainder function
remove stdio.h remove - remove a file
remque search.h XSI insque, remque - insert or remove an element in a queue
remquo math.h remquo, remquof, remquol - remainder functions
remquof math.h remquo, remquof, remquol - remainder functions
remquol math.h remquo, remquof, remquol - remainder functions
rename stdio.h CX rename, renameat - rename file relative to directory file descriptor
renameat stdio.h CX rename, renameat - rename file relative to directory file descriptor
rewind stdio.h rewind - reset the file position indicator in a stream
rewinddir dirent.h rewinddir - reset the position of a directory stream to the beginning of a directory
rint math.h rint, rintf, rintl - round-to-nearest integral value
rintf math.h rint, rintf, rintl - round-to-nearest integral value
rintl math.h rint, rintf, rintl - round-to-nearest integral value
rmdir unistd.h rmdir - remove a directory
round math.h round, roundf, roundl - round to the nearest integer value in a floating-point format
roundf math.h round, roundf, roundl - round to the nearest integer value in a floating-point format
roundl math.h round, roundf, roundl - round to the nearest integer value in a floating-point format
scalbln math.h scalbln, scalblnf, scalblnl, scalbn, scalbnf, scalbnl - compute exponent using FLT_RADIX
scalblnf math.h scalbln, scalblnf, scalblnl, scalbn, scalbnf, scalbnl - compute exponent using FLT_RADIX
scalblnl math.h scalbln, scalblnf, scalblnl, scalbn, scalbnf, scalbnl - compute exponent using FLT_RADIX
scalbn math.h scalbln, scalblnf, scalblnl, scalbn, scalbnf, scalbnl - compute exponent using FLT_RADIX
scalbnf math.h scalbln, scalblnf, scalblnl, scalbn, scalbnf, scalbnl - compute exponent using FLT_RADIX
scalbnl math.h scalbln, scalblnf, scalblnl, scalbn, scalbnf, scalbnl - compute exponent using FLT_RADIX
scandir dirent.h alphasort, scandir - scan a directory
scanf stdio.h fscanf, scanf, sscanf - convert formatted input
sched_get_priority_max sched.h PS sched_get_priority_max, sched_get_priority_min - get priority limits (REALTIME)
sched_get_priority_min sched.h PS sched_get_priority_max, sched_get_priority_min - get priority limits (REALTIME)
sched_getparam sched.h PS sched_getparam - get scheduling parameters (REALTIME)
sched_getscheduler sched.h PS sched_getscheduler - get scheduling policy (REALTIME)
sched_rr_get_interval sched.h PS sched_rr_get_interval - get execution time limits (REALTIME)
sched_setparam sched.h PS sched_setparam - set scheduling parameters (REALTIME)
sched_setscheduler sched.h PS sched_setscheduler - set scheduling policy and parameters (REALTIME)
sched_yield sched.h sched_yield - yield the processor
seed48 stdlib.h XSI drand48, erand48, jrand48, lcong48, lrand48, mrand48, nrand48, seed48, srand48 - generate uniformly distributed pseudo-random numbers
seekdir dirent.h XSI seekdir - set the position of a directory stream
select sys_select.h pselect, select - synchronous I/O multiplexing
sem_close semaphore.h sem_close - close a named semaphore
sem_destroy semaphore.h sem_destroy - destroy an unnamed semaphore
sem_getvalue semaphore.h sem_getvalue - get the value of a semaphore
sem_init semaphore.h sem_init - initialize an unnamed semaphore
sem_open semaphore.h sem_open - initialize and open a named semaphore
sem_post semaphore.h sem_post - unlock a semaphore
sem_timedwait semaphore.h time.h sem_timedwait - lock a semaphore
sem_trywait semaphore.h sem_trywait, sem_wait - lock a semaphore
sem_unlink semaphore.h sem_unlink - remove a named semaphore
sem_wait semaphore.h sem_trywait, sem_wait - lock a semaphore
semctl sys/sem.h XSI semctl - XSI semaphore control operations
semget sys_sem.h XSI semget - get set of XSI semaphores
semop sys_sem.h XSI semop - XSI semaphore operations
send sys_socket.h send - send a message on a socket
sendmsg sys_socket.h sendmsg - send a message on a socket using a message structure
sendto sys_socket.h sendto - send a message on a socket
setbuf stdio.h setbuf - assign buffering to a stream
setegid unistd.h setegid - set the effective group ID
setenv stdlib.h CX setenv - add or change environment variable
seteuid unistd.h seteuid - set effective user ID
setgid unistd.h setgid - set-group-ID
setgrent grp.h XSI endgrent, getgrent, setgrent - group database entry functions
sethostent netdb.h endhostent, gethostent, sethostent - network host database functions
setitimer sys_time.h OB XSI getitimer, setitimer - get and set value of interval timer
setjmp setjmp.h setjmp - set jump point for a non-local goto
setkey stdlib.h XSI setkey - set encoding key (CRYPT)
setlocale locale.h setlocale - set program locale
setlogmask syslog.h XSI closelog, openlog, setlogmask, syslog - control system log
setnetent netdb.h endnetent, getnetbyaddr, getnetbyname, getnetent, setnetent - network database functions
setpgid unistd.h setpgid - set process group ID for job control
setpgrp unistd.h OB XSI setpgrp - set the process group ID
setpriority sys_resource.h XSI getpriority, setpriority - get and set the nice value
setprotoent netdb.h endprotoent, getprotobyname, getprotobynumber, getprotoent, setprotoent - network protocol database functions
setpwent pwd.h XSI endpwent, getpwent, setpwent - user database functions
setregid unistd.h XSI setregid - set real and effective group IDs
setreuid unistd.h XSI setreuid - set real and effective user IDs
setrlimit sys_resource.h XSI getrlimit, setrlimit - control maximum resource consumption
setservent netdb.h endservent, getservbyname, getservbyport, getservent, setservent - network services database functions
setsid unistd.h setsid - create session and set process group ID
setsockopt sys_socket.h setsockopt - set the socket options
setstate stdlib.h XSI initstate, random, setstate, srandom - pseudo-random number functions
setuid unistd.h setuid - set user ID
setutxent utmpx.h XSI endutxent, getutxent, getutxid, getutxline, pututxline, setutxent - user accounting database functions
setvbuf stdio.h setvbuf - assign buffering to a stream
shm_open sys_mman.h SHM shm_open - open a shared memory object (REALTIME)
shm_unlink sys_mman.h SHM shm_unlink - remove a shared memory object (REALTIME)
shmat sys_shm.h XSI shmat - XSI shared memory attach operation
shmctl sys_shm.h XSI shmctl - XSI shared memory control operations
shmdt sys_shm.h XSI shmdt - XSI shared memory detach operation
shmget sys_shm.h XSI shmget - get an XSI shared memory segment
shutdown sys_socket.h shutdown - shut down socket send and receive operations
sigaction signal.h CX sigaction - examine and change a signal action
sigaddset signal.h CX sigaddset - add a signal to a signal set
sigaltstack signal.h XSI sigaltstack - set and get signal alternate stack context
sigdelset signal.h CX sigdelset - delete a signal from a signal set
sigemptyset signal.h CX sigemptyset - initialize and empty a signal set
sigfillset signal.h CX sigfillset - initialize and fill a signal set
sighold signal.h OB XSI sighold, sigignore, sigpause, sigrelse, sigset - signal management
sigignore signal.h OB XSI sighold, sigignore, sigpause, sigrelse, sigset - signal management
siginterrupt signal.h OB XSI siginterrupt - allow signals to interrupt functions
sigismember signal.h CX sigismember - test for a signal in a signal set
siglongjmp setjmp.h CX siglongjmp - non-local goto with signal handling
signal signal.h signal - signal management
signbit math.h signbit - test sign
signgam math.h XSI lgamma, lgammaf, lgammal, signgam - log gamma function
sigpause signal.h OB XSI sighold, sigignore, sigpause, sigrelse, sigset - signal management
sigpending signal.h CX sigpending - examine pending signals
sigprocmask signal.h CX pthread_sigmask, sigprocmask - examine and change blocked signals
sigqueue signal.h CX sigqueue - queue a signal to a process
sigrelse signal.h OB XSI sighold, sigignore, sigpause, sigrelse, sigset - signal management
sigset signal.h OB XSI sighold, sigignore, sigpause, sigrelse, sigset - signal management
sigsetjmp setjmp.h CX sigsetjmp - set jump point for a non-local goto
sigsuspend signal.h CX sigsuspend - wait for a signal
sigtimedwait signal.h CX sigtimedwait, sigwaitinfo - wait for queued signals
sigwait signal.h CX sigwait - wait for queued signals
sigwaitinfo signal.h CX sigtimedwait, sigwaitinfo - wait for queued signals
sin math.h sin, sinf, sinl - sine function
sinf math.h sin, sinf, sinl - sine function
sinh math.h sinh, sinhf, sinhl - hyperbolic sine functions
sinhf math.h sinh, sinhf, sinhl - hyperbolic sine functions
sinhl math.h sinh, sinhf, sinhl - hyperbolic sine functions
sinl math.h sin, sinf, sinl - sine function
sleep unistd.h sleep - suspend execution for an interval of time
snprintf stdio.h CX dprintf, fprintf, printf, snprintf, sprintf - print formatted output
sockatmark sys_socket.h sockatmark - determine whether a socket is at the out-of-band mark
socket sys_socket.h socket - create an endpoint for communication
socketpair sys_socket.h socketpair - create a pair of connected sockets
sprintf stdio.h CX dprintf, fprintf, printf, snprintf, sprintf - print formatted output
sqrt math.h sqrt, sqrtf, sqrtl - square root function
sqrtf math.h sqrt, sqrtf, sqrtl - square root function
sqrtl math.h sqrt, sqrtf, sqrtl - square root function
srand stdlib.h OB CX rand, rand_r, srand - pseudo-random number generator
srand48 stdlib.h XSI drand48, erand48, jrand48, lcong48, lrand48, mrand48, nrand48, seed48, srand48 - generate uniformly distributed pseudo-random numbers
srandom stdlib.h XSI initstate, random, setstate, srandom - pseudo-random number functions
sscanf stdio.h fscanf, scanf, sscanf - convert formatted input
stat sys_stat.h fstatat, lstat, stat - get file status
statvfs sys_statvfs.h fstatvfs, statvfs - get file system information
stderr stdio.h stderr, stdin, stdout - standard I/O streams
stdin stdio.h stderr, stdin, stdout - standard I/O streams
stdout stdio.h stderr, stdin, stdout - standard I/O streams
stpcpy string.h CX stpcpy, strcpy - copy a string and return a pointer to the end of the result
stpncpy string.h CX stpncpy, strncpy - copy fixed length string, returning a pointer to the array end
strcasecmp strings.h strcasecmp, strcasecmp_l, strncasecmp, strncasecmp_l - case-insensitive string comparisons
strcasecmp_l strings.h strcasecmp, strcasecmp_l, strncasecmp, strncasecmp_l - case-insensitive string comparisons
strcat string.h strcat - concatenate two strings
strchr string.h strchr - string scanning operation
strcmp string.h strcmp - compare two strings
strcoll string.h CX strcoll, strcoll_l - string comparison using collating information
strcoll_l string.h CX strcoll, strcoll_l - string comparison using collating information
strcpy string.h CX stpcpy, strcpy - copy a string and return a pointer to the end of the result
strcspn string.h strcspn - get the length of a complementary substring
strdup string.h CX strdup, strndup - duplicate a specific number of bytes from a string
strerror string.h CX strerror, strerror_l, strerror_r - get error message string
strerror_l string.h CX strerror, strerror_l, strerror_r - get error message string
strerror_r string.h CX strerror, strerror_l, strerror_r - get error message string
strfmon monetary.h strfmon, strfmon_l - convert monetary value to a string
strfmon_l monetary.h strfmon, strfmon_l - convert monetary value to a string
strftime time.h CX strftime, strftime_l - convert date and time to a string
strftime_l time.h CX strftime, strftime_l - convert date and time to a string
strlen string.h CX strlen, strnlen - get length of fixed size string
strncasecmp strings.h strcasecmp, strcasecmp_l, strncasecmp, strncasecmp_l - case-insensitive string comparisons
strncasecmp_l strings.h strcasecmp, strcasecmp_l, strncasecmp, strncasecmp_l - case-insensitive string comparisons
strncat string.h strncat - concatenate a string with part of another
strncmp string.h strncmp - compare part of two strings
strncpy string.h CX stpncpy, strncpy - copy fixed length string, returning a pointer to the array end
strndup string.h CX strdup, strndup - duplicate a specific number of bytes from a string
strnlen string.h CX strlen, strnlen - get length of fixed size string
strpbrk string.h strpbrk - scan a string for a byte
strptime time.h XSI strptime - date and time conversion
strrchr string.h strrchr - string scanning operation
strsignal string.h CX strsignal - get name of signal
strspn string.h strspn - get length of a substring
strstr string.h strstr - find a substring
strtod stdlib.h strtod, strtof, strtold - convert a string to a double-precision number
strtof stdlib.h strtod, strtof, strtold - convert a string to a double-precision number
strtoimax inttypes.h strtoimax, strtoumax - convert string to integer type
strtok string.h CX strtok, strtok_r - split string into tokens
strtok_r string.h CX strtok, strtok_r - split string into tokens
strtol stdlib.h strtol, strtoll - convert a string to a long integer
strtold stdlib.h strtod, strtof, strtold - convert a string to a double-precision number
strtoll stdlib.h strtol, strtoll - convert a string to a long integer
strtoul stdlib.h strtoul, strtoull - convert a string to an unsigned long
strtoull stdlib.h strtoul, strtoull - convert a string to an unsigned long
strtoumax inttypes.h strtoimax, strtoumax - convert string to integer type
strxfrm string.h CX strxfrm, strxfrm_l - string transformation
strxfrm_l string.h CX strxfrm, strxfrm_l - string transformation
swab unistd.h XSI swab - swap bytes
swprintf stdio.h wchar.h fwprintf, swprintf, wprintf - print formatted wide-character output
swscanf stdio.h wchar.h fwscanf, swscanf, wscanf - convert formatted wide-character input
symlink unistd.h symlink, symlinkat - make a symbolic link relative to directory file descriptor
symlinkat unistd.h symlink, symlinkat - make a symbolic link relative to directory file descriptor
sync unistd.h XSI sync - schedule file system updates
sysconf unistd.h sysconf - get configurable system variables
syslog syslog.h XSI closelog, openlog, setlogmask, syslog - control system log
system stdlib.h system - issue a command
tan math.h tan, tanf, tanl - tangent function
tanf math.h tan, tanf, tanl - tangent function
tanh math.h tanh, tanhf, tanhl - hyperbolic tangent functions
tanhf math.h tanh, tanhf, tanhl - hyperbolic tangent functions
tanhl math.h tanh, tanhf, tanhl - hyperbolic tangent functions
tanl math.h tan, tanf, tanl - tangent function
tcdrain termios.h tcdrain - wait for transmission of output
tcflow termios.h tcflow - suspend or restart the transmission or reception of data
tcflush termios.h tcflush - flush non-transmitted output data, non-read input data, or both
tcgetattr termios.h tcgetattr - get the parameters associated with the terminal
tcgetpgrp unistd.h tcgetpgrp - get the foreground process group ID
tcgetsid termios.h tcgetsid - get the process group ID for the session leader for the controlling terminal
tcsendbreak termios.h tcsendbreak - send a break for a specific duration
tcsetattr termios.h tcsetattr - set the parameters associated with the terminal
tcsetpgrp unistd.h tcsetpgrp - set the foreground process group ID
tdelete search.h XSI tdelete, tfind, tsearch, twalk - manage a binary search tree
telldir dirent.h XSI telldir - current location of a named directory stream
tempnam stdio.h OB XSI tempnam - create a name for a temporary file
tfind search.h XSI tdelete, tfind, tsearch, twalk - manage a binary search tree
tgamma math.h tgamma, tgammaf, tgammal - compute gamma() function
tgammaf math.h tgamma, tgammaf, tgammal - compute gamma() function
tgammal math.h tgamma, tgammaf, tgammal - compute gamma() function
time time.h time - get time
timer_create signal.h time.h CX timer_create - create a per-process timer
timer_delete time.h CX timer_delete - delete a per-process timer
timer_getoverrun time.h CX timer_getoverrun, timer_gettime, timer_settime - per-process timers
timer_gettime time.h CX timer_getoverrun, timer_gettime, timer_settime - per-process timers
timer_settime time.h CX timer_getoverrun, timer_gettime, timer_settime - per-process timers
times sys_times.h times - get process and waited-for child process times
timezone time.h XSI CX daylight, timezone, tzname, tzset - set timezone conversion information
tmpfile stdio.h tmpfile - create a temporary file
tmpnam stdio.h OB tmpnam - create a name for a temporary file
toascii ctype.h OB XSI toascii - translate an integer to a 7-bit ASCII character
tolower ctype.h CX tolower, tolower_l - transliterate uppercase characters to lowercase
tolower_l ctype.h CX tolower, tolower_l - transliterate uppercase characters to lowercase
toupper ctype.h CX toupper, toupper_l - transliterate lowercase characters to uppercase
toupper_l ctype.h CX toupper, toupper_l - transliterate lowercase characters to uppercase
towctrans wctype.h CX towctrans, towctrans_l - wide-character transliteration
towctrans_l wctype.h CX towctrans, towctrans_l - wide-character transliteration
towlower wctype.h CX towlower, towlower_l - transliterate uppercase wide-character code to lowercase
towlower_l wctype.h CX towlower, towlower_l - transliterate uppercase wide-character code to lowercase
towupper wctype.h CX towupper, towupper_l - transliterate lowercase wide-character code to uppercase
towupper_l wctype.h CX towupper, towupper_l - transliterate lowercase wide-character code to uppercase
trunc math.h trunc, truncf, truncl - round to truncated integer value
truncate unistd.h truncate - truncate a file to a specified length
truncf math.h trunc, truncf, truncl - round to truncated integer value
truncl math.h trunc, truncf, truncl - round to truncated integer value
tsearch search.h XSI tdelete, tfind, tsearch, twalk - manage a binary search tree
ttyname unistd.h ttyname, ttyname_r - find the pathname of a terminal
ttyname_r unistd.h ttyname, ttyname_r - find the pathname of a terminal
twalk search.h XSI tdelete, tfind, tsearch, twalk - manage a binary search tree
tzname time.h XSI CX daylight, timezone, tzname, tzset - set timezone conversion information
tzset time.h XSI CX daylight, timezone, tzname, tzset - set timezone conversion information
ulimit ulimit.h OB XSI ulimit - get and set process limits
umask sys_stat.h umask - set and get the file mode creation mask
uname sys_utsname.h uname - get the name of the current system
ungetc stdio.h ungetc - push byte back into input stream
ungetwc stdio.h wchar.h ungetwc - push wide-character code back into the input stream
unlink unistd.h unlink, unlinkat - remove a directory entry relative to directory file descriptor
unlinkat unistd.h unlink, unlinkat - remove a directory entry relative to directory file descriptor
unlockpt stdlib.h XSI unlockpt - unlock a pseudo-terminal master/slave pair
unsetenv stdlib.h CX unsetenv - remove an environment variable
uselocale locale.h CX uselocale - use locale in current thread
utime utime.h OB utime - set file access and modification times
utimensat sys_stat.h sys_time.h XSI futimens, utimensat, utimes - set file access and modification times
utimes sys_stat.h sys_time.h XSI futimens, utimensat, utimes - set file access and modification times
va_arg stdarg.h va_arg, va_copy, va_end, va_start - handle variable argument list
va_copy stdarg.h va_arg, va_copy, va_end, va_start - handle variable argument list
va_end stdarg.h va_arg, va_copy, va_end, va_start - handle variable argument list
va_start stdarg.h va_arg, va_copy, va_end, va_start - handle variable argument list
vdprintf stdarg.h stdio.h CX vdprintf, vfprintf, vprintf, vsnprintf, vsprintf - format output of a stdarg argument list
vfprintf stdarg.h stdio.h CX vdprintf, vfprintf, vprintf, vsnprintf, vsprintf - format output of a stdarg argument list
vfscanf stdarg.h stdio.h vfscanf, vscanf, vsscanf - format input of a stdarg argument list
vfwprintf stdarg.h stdio.h wchar.h vfwprintf, vswprintf, vwprintf - wide-character formatted output of a stdarg argument list
vfwscanf stdarg.h stdio.h wchar.h vfwscanf, vswscanf, vwscanf - wide-character formatted input of a stdarg argument list
vprintf stdarg.h stdio.h CX vdprintf, vfprintf, vprintf, vsnprintf, vsprintf - format output of a stdarg argument list
vscanf stdarg.h stdio.h vfscanf, vscanf, vsscanf - format input of a stdarg argument list
vsnprintf stdarg.h stdio.h CX vdprintf, vfprintf, vprintf, vsnprintf, vsprintf - format output of a stdarg argument list
vsprintf stdarg.h stdio.h CX vdprintf, vfprintf, vprintf, vsnprintf, vsprintf - format output of a stdarg argument list
vsscanf stdarg.h stdio.h vfscanf, vscanf, vsscanf - format input of a stdarg argument list
vswprintf stdarg.h stdio.h wchar.h vfwprintf, vswprintf, vwprintf - wide-character formatted output of a stdarg argument list
vswscanf stdarg.h stdio.h wchar.h vfwscanf, vswscanf, vwscanf - wide-character formatted input of a stdarg argument list
vwprintf stdarg.h stdio.h wchar.h vfwprintf, vswprintf, vwprintf - wide-character formatted output of a stdarg argument list
vwscanf stdarg.h stdio.h wchar.h vfwscanf, vswscanf, vwscanf - wide-character formatted input of a stdarg argument list
wait sys_wait.h wait, waitpid - wait for a child process to stop or terminate
waitid sys_wait.h waitid - wait for a child process to change state
waitpid sys_wait.h wait, waitpid - wait for a child process to stop or terminate
wcpcpy wchar.h CX wcpcpy, wcscpy - copy a wide-character string, returning a pointer to its end
wcpncpy wchar.h CX wcpncpy, wcsncpy - copy a fixed-size wide-character string, returning a pointer to its end
wcrtomb stdio.h wcrtomb - convert a wide-character code to a character (restartable)
wcscasecmp wchar.h CX wcscasecmp, wcscasecmp_l, wcsncasecmp, wcsncasecmp_l - case-insensitive wide-character string comparison
wcscasecmp_l wchar.h CX wcscasecmp, wcscasecmp_l, wcsncasecmp, wcsncasecmp_l - case-insensitive wide-character string comparison
wcscat wchar.h wcscat - concatenate two wide-character strings
wcschr wchar.h wcschr - wide-character string scanning operation
wcscmp wchar.h wcscmp - compare two wide-character strings
wcscoll wchar.h CX wcscoll, wcscoll_l - wide-character string comparison using collating information
wcscoll_l wchar.h CX wcscoll, wcscoll_l - wide-character string comparison using collating information
wcscpy wchar.h CX wcpcpy, wcscpy - copy a wide-character string, returning a pointer to its end
wcscspn wchar.h wcscspn - get the length of a complementary wide substring
wcsdup wchar.h CX wcsdup - duplicate a wide-character string
wcsftime wchar.h wcsftime - convert date and time to a wide-character string
wcslen wchar.h CX wcslen, wcsnlen - get length of a fixed-sized wide-character string
wcsncasecmp wchar.h CX wcscasecmp, wcscasecmp_l, wcsncasecmp, wcsncasecmp_l - case-insensitive wide-character string comparison
wcsncasecmp_l wchar.h CX wcscasecmp, wcscasecmp_l, wcsncasecmp, wcsncasecmp_l - case-insensitive wide-character string comparison
wcsncat wchar.h wcsncat - concatenate a wide-character string with part of another
wcsncmp wchar.h wcsncmp - compare part of two wide-character strings
wcsncpy wchar.h CX wcpncpy, wcsncpy - copy a fixed-size wide-character string, returning a pointer to its end
wcsnlen wchar.h CX wcslen, wcsnlen - get length of a fixed-sized wide-character string
wcsnrtombs wchar.h CX wcsnrtombs, wcsrtombs - convert a wide-character string to a character string (restartable)
wcspbrk wchar.h wcspbrk - scan a wide-character string for a wide-character code
wcsrchr wchar.h wcsrchr - wide-character string scanning operation
wcsrtombs wchar.h CX wcsnrtombs, wcsrtombs - convert a wide-character string to a character string (restartable)
wcsspn wchar.h wcsspn - get the length of a wide substring
wcsstr wchar.h wcsstr - find a wide-character substring
wcstod wchar.h wcstod, wcstof, wcstold - convert a wide-character string to a double-precision number
wcstof wchar.h wcstod, wcstof, wcstold - convert a wide-character string to a double-precision number
wcstoimax stddef.h inttypes.h wcstoimax, wcstoumax - convert a wide-character string to an integer type
wcstok wchar.h wcstok - split a wide-character string into tokens
wcstol wchar.h wcstol, wcstoll - convert a wide-character string to a long integer
wcstold wchar.h wcstod, wcstof, wcstold - convert a wide-character string to a double-precision number
wcstoll wchar.h wcstol, wcstoll - convert a wide-character string to a long integer
wcstombs stdlib.h wcstombs - convert a wide-character string to a character string
wcstoul wchar.h wcstoul, wcstoull - convert a wide-character string to an unsigned long
wcstoull wchar.h wcstoul, wcstoull - convert a wide-character string to an unsigned long
wcstoumax stddef.h inttypes.h wcstoimax, wcstoumax - convert a wide-character string to an integer type
wcswidth wchar.h XSI wcswidth - number of column positions of a wide-character string
wcsxfrm wchar.h CX wcsxfrm, wcsxfrm_l - wide-character string transformation
wcsxfrm_l wchar.h CX wcsxfrm, wcsxfrm_l - wide-character string transformation
wctob stdio.h wchar.h wctob - wide-character to single-byte conversion
wctomb stdlib.h wctomb - convert a wide-character code to a character
wctrans wctype.h CX wctrans, wctrans_l - define character mapping
wctrans_l wctype.h CX wctrans, wctrans_l - define character mapping
wctype wctype.h CX wctype, wctype_l - define character class
wctype_l wctype.h CX wctype, wctype_l - define character class
wcwidth wchar.h XSI wcwidth - number of column positions of a wide-character code
wmemchr wchar.h wmemchr - find a wide character in memory
wmemcmp wchar.h wmemcmp - compare wide characters in memory
wmemcpy wchar.h wmemcpy - copy wide characters in memory
wmemmove wchar.h wmemmove - copy wide characters in memory with overlapping areas
wmemset wchar.h wmemset - set wide characters in memory
wordexp wordexp.h wordexp, wordfree - perform word expansions
wordfree wordexp.h wordexp, wordfree - perform word expansions
wprintf stdio.h wchar.h fwprintf, swprintf, wprintf - print formatted wide-character output
write unistd.h pwrite, write - write on a file
writev sys_uio.h XSI writev - write a vector
wscanf stdio.h wchar.h fwscanf, swscanf, wscanf - convert formatted wide-character input
y0 math.h XSI y0, y1, yn - Bessel functions of the second kind
y1 math.h XSI y0, y1, yn - Bessel functions of the second kind
yn math.h XSI y0, y1, yn - Bessel functions of the second kind