Table of Contents
Note that the core of the Single UNIX® Specification Version 5 is POSIX®.1-2024 also simultaneously IEEE Std 1003.1™-2024 Edition, The ®Open Group Base Specifications Issue 8 (see https://pubs.opengroup.org/onlinepubs/9799919799/), and ISO®/IEC DIS 9945 Information technology - Portable Operating System Interface (POSIX®) base specifications - Issue 8.
CMPLX
CMPLXF
CMPLXL
FD_CLR
FD_ISSET
FD_SET
FD_ZERO
_Exit
_exit
a64l
abort
abs
accept
accept4
access
acos
acosf
acosh
acoshf
acoshl
acosl
aio_cancel
aio_error
aio_fsync
aio_read
aio_return
aio_suspend
aio_write
alarm
aligned_alloc
alphasort
asctime
asctime_r
asin
asinf
asinh
asinhf
asinhl
asinl
asprintf
assert
at_quick_exit
atan
atan2
atan2f
atan2l
atanf
atanh
atanhf
atanhl
atanl
atexit
atof
atoi
atol
atoll
atomic_compare_exchange_strong
atomic_compare_exchange_strong_explicit
atomic_compare_exchange_weak
atomic_compare_exchange_weak_explicit
atomic_exchange
atomic_exchange_explicit
atomic_fetch_add
atomic_fetch_add_explicit
atomic_fetch_and
atomic_fetch_and_explicit
atomic_fetch_or
atomic_fetch_or_explicit
atomic_fetch_sub
atomic_fetch_sub_explicit
atomic_fetch_xor
atomic_fetch_xor_explicit
atomic_flag_clear
atomic_flag_clear_explicit
atomic_flag_test_and_set
atomic_flag_test_and_set_explicit
atomic_init
atomic_is_lock_free
atomic_load
atomic_load_explicit
atomic_signal_fence
atomic_store
atomic_store_explicit
atomic_thread_fence
basename (see the section called “Implementation Notes”)
be16toh
be32toh
be64toh
bind
bind_textdomain_codeset
bindtextdomain
bsearch
btowc
c16rtomb
c32rtomb
cabs
cabsf
cabsl
cacos
cacosf
cacosh
cacoshf
cacoshl
cacosl
call_once
calloc
carg
cargf
cargl
casin
casinf
casinh
casinhf
casinhl
casinl
catan
catanf
catanh
catanhf
catanhl
catanl
catclose
catgets
catopen
cbrt
cbrtf
cbrtl
ccos
ccosf
ccosh
ccoshf
ccoshl
ccosl
ceil
ceilf
ceill
cexp
cexpf
cexpl
cfgetispeed
cfgetospeed
cfsetispeed
cfsetospeed
chdir
chmod
chown
cimag
cimagf
cimagl
clearerr
clock
clock_getcpuclockid
clock_getres
clock_gettime
clock_nanosleep (see the section called “Implementation Notes”)
clock_settime (see the section called “Implementation Notes”)
clog
clogf
clogl
close
closedir
closelog
cnd_broadcast
cnd_destroy
cnd_init
cnd_signal
cnd_timedwait
cnd_wait
confstr
conj
conjf
conjl
connect
copysign
copysignf
copysignl
cos
cosf
cosh
coshf
coshl
cosl
cpow
cpowf
cpowl
cproj
cprojf
cprojl
creal
crealf
creall
creat
crypt (available in external "libcrypt" library)
csin
csinf
csinh
csinhf
csinhl
csinl
csqrt
csqrtf
csqrtl
ctan
ctanf
ctanh
ctanhf
ctanhl
ctanl
ctermid
ctime
ctime_r
daylight
dbm_clearerr (available in external "libgdbm" library)
dbm_close (available in external "libgdbm" library)
dbm_delete (available in external "libgdbm" library)
dbm_error (available in external "libgdbm" library)
dbm_fetch (available in external "libgdbm" library)
dbm_firstkey (available in external "libgdbm" library)
dbm_nextkey (available in external "libgdbm" library)
dbm_open (available in external "libgdbm" library)
dbm_store (available in external "libgdbm" library)
dcgettext (available in external "libintl" library)
dcngettext (available in external "libintl" library)
dgettext (available in external "libintl" library)
difftime
dirfd
dirname
div
dladdr (see the section called “Implementation Notes”)
dlclose
dlerror
dlopen
dlsym
dngettext (available in external "libintl" library)
dprintf
drand48
dup
dup2
dup3
duplocale
encrypt (available in external "libcrypt" library)
endgrent
endhostent
endprotoent
endpwent
endservent
endutxent
environ
erand48
erf
erfc
erfcf
erfcl
erff
erfl
errno
execl
execle
execlp
execv
execve
execvp
exit
exp
exp2
exp2f
exp2l
expf
expl
expm1
expm1f
expm1l
fabs
fabsf
fabsl
faccessat
fchdir
fchmod
fchmodat
fchown
fchownat
fclose
fcntl (see the section called “Implementation Notes”)
fdatasync
fdim
fdimf
fdiml
fdopen
fdopendir
feclearexcept
fegetenv
fegetexceptflag
fegetround
feholdexcept
feof
feraiseexcept
ferror
fesetenv
fesetexceptflag
fesetround
fetestexcept
feupdateenv
fexecve
fflush
ffs
ffsl
ffsll
fgetc
fgetpos
fgets
fgetwc
fgetws
fileno
flockfile
floor
floorf
floorl
fma
fmaf
fmal
fmax
fmaxf
fmaxl
fmemopen
fmin
fminf
fminl
fmod
fmodf
fmodl
fnmatch
fopen
fork
fpathconf
fpclassify (see the section called “Implementation Notes”)
fprintf
fputc
fputs
fputwc
fputws
fread
free
freeaddrinfo
freelocale
freopen
frexp
frexpf
frexpl
fscanf
fseek
fseeko
fsetpos
fstat
fstatat
fstatvfs
fsync
ftell
ftello
ftok
ftruncate
ftrylockfile
funlockfile
futimens
fwide
fwprintf
fwrite
fwscanf
gai_strerror
getaddrinfo
getc
getc_unlocked
getchar
getchar_unlocked
getcwd
getdelim
getegid
getentropy
getenv
geteuid
getgid
getgrent
getgrgid
getgrgid_r
getgrnam
getgrnam_r
getgroups
gethostid
gethostname
getline
getlocalename_l
getlogin
getlogin_r
getnameinfo
getopt
getpeername
getpgid
getpgrp
getpid
getppid
getpriority
getprotobyname
getprotobynumber
getprotoent
getpwent
getpwnam
getpwnam_r
getpwuid
getpwuid_r
getrlimit (see the section called “Implementation Notes”)
getrusage
getservbyname
getservbyport
getservent
getsid
getsockname
getsockopt
getsubopt
gettext (available in external "libintl" library)
getuid
getutxent
getutxid
getutxline
getwc
getwchar
glob
globfree
gmtime
gmtime_r
grantpt
hcreate
hdestroy
hsearch
htobe16
htobe32
htobe64
htole16
htole32
htole64
htonl
htons
hypot
hypotf
hypotl
iconv (available in external "libiconv" library)
iconv_close (available in external "libiconv" library)
iconv_open (available in external "libiconv" library)
if_freenameindex
if_indextoname
if_nameindex
if_nametoindex
ilogb
ilogbf
ilogbl
imaxabs
imaxdiv
in6addr_any
in6addr_loopback
inet_addr
inet_ntoa
inet_ntop
inet_pton
initstate
insque
isalnum
isalnum_l
isalpha
isalpha_l
isatty
isblank
isblank_l
iscntrl
iscntrl_l
isdigit
isdigit_l
isfinite (see the section called “Implementation Notes”)
isgraph
isgraph_l
isgreater (see the section called “Implementation Notes”)
isgreaterequal (see the section called “Implementation Notes”)
isinf (see the section called “Implementation Notes”)
isless
islessequal (see the section called “Implementation Notes”)
islessgreater (see the section called “Implementation Notes”)
islower
islower_l
isnan (see the section called “Implementation Notes”)
isnormal (see the section called “Implementation Notes”)
isprint
isprint_l
ispunct
ispunct_l
isspace
isspace_l
isunordered (see the section called “Implementation Notes”)
isupper
isupper_l
iswalnum
iswalnum_l
iswalpha
iswalpha_l
iswblank
iswblank_l
iswcntrl
iswcntrl_l
iswctype
iswctype_l
iswdigit
iswdigit_l
iswgraph
iswgraph_l
iswlower
iswlower_l
iswprint
iswprint_l
iswpunct
iswpunct_l
iswspace
iswspace_l
iswupper
iswupper_l
iswxdigit
iswxdigit_l
isxdigit
isxdigit_l
j0
j1
jn
jrand48
kill
kill_dependency
killpg
l64a
labs
lchown
lcong48
ldexp
ldexpf
ldexpl
ldiv
le16toh
le32toh
le64toh
lfind
lgamma
lgammaf
lgammal
link
linkat
lio_listio
listen
llabs
lldiv
llrint
llrintf
llrintl
llround
llroundf
llroundl
localeconv
localtime
localtime_r
lockf (see the section called “Implementation Notes”)
log
log10
log10f
log10l
log1p
log1pf
log1pl
log2
log2f
log2l
logb
logbf
logbl
logf
logl
longjmp
lrand48
lrint
lrintf
lrintl
lround
lroundf
lroundl
lsearch
lseek
lstat
malloc
mblen
mbrlen
mbrtoc16
mbrtoc32
mbrtowc
mbsinit
mbsnrtowcs
mbsrtowcs
mbstowcs
mbtowc
memccpy
memchr
memcmp
memcpy
memmem
memmove
memset
mkdir
mkdirat
mkdtemp
mkfifo
mkfifoat
mknod
mknodat
mkostemp
mkstemp
mktime
mlock
mmap
modf
modff
modfl
mprotect
mq_close
mq_getattr
mq_notify
mq_open
mq_receive
mq_send
mq_setattr
mq_timedreceive
mq_timedsend
mq_unlink
mrand48
msgctl (see the section called “Implementation Notes”)
msgget (see the section called “Implementation Notes”)
msgrcv (see the section called “Implementation Notes”)
msgsnd (see the section called “Implementation Notes”)
msync
mtx_destroy
mtx_init
mtx_lock
mtx_timedlock
mtx_trylock
mtx_unlock
munlock
munmap
nan
nanf
nanl
nanosleep
nearbyint
nearbyintf
nearbyintl
newlocale
nextafter
nextafterf
nextafterl
nexttoward
nexttowardf
nexttowardl
nftw
ngettext (available in external "libintl" library)
nice (see the section called “Implementation Notes”)
nl_langinfo
nl_langinfo_l
nrand48
ntohl
ntohs
open
open_memstream
open_wmemstream
openat
opendir
openlog
optarg
opterr
optind
optopt
pathconf
pause
pclose
perror
pipe
pipe2
poll
popen
posix_close
posix_devctl
posix_fadvise
posix_fallocate
posix_getdents
posix_madvise
posix_memalign
posix_openpt
posix_spawn
posix_spawn_file_actions_addchdir
posix_spawn_file_actions_addclose
posix_spawn_file_actions_adddup2
posix_spawn_file_actions_addfchdir
posix_spawn_file_actions_addopen
posix_spawn_file_actions_destroy
posix_spawn_file_actions_init
posix_spawnattr_destroy
posix_spawnattr_getflags
posix_spawnattr_getpgroup
posix_spawnattr_getschedparam
posix_spawnattr_getschedpolicy
posix_spawnattr_getsigdefault
posix_spawnattr_getsigmask
posix_spawnattr_init
posix_spawnattr_setflags
posix_spawnattr_setpgroup
posix_spawnattr_setschedparam
posix_spawnattr_setschedpolicy
posix_spawnattr_setsigdefault
posix_spawnattr_setsigmask
posix_spawnp
pow
powf
powl
ppoll
pread
printf
pselect
psiginfo
psignal
pthread_atfork
pthread_attr_destroy
pthread_attr_getdetachstate
pthread_attr_getguardsize
pthread_attr_getinheritsched
pthread_attr_getschedparam
pthread_attr_getschedpolicy
pthread_attr_getscope
pthread_attr_getstack
pthread_attr_getstacksize
pthread_attr_init
pthread_attr_setdetachstate
pthread_attr_setguardsize
pthread_attr_setinheritsched
pthread_attr_setschedparam
pthread_attr_setschedpolicy
pthread_attr_setscope
pthread_attr_setstack
pthread_attr_setstacksize
pthread_barrier_destroy
pthread_barrier_init
pthread_barrier_wait
pthread_barrierattr_destroy
pthread_barrierattr_getpshared
pthread_barrierattr_init
pthread_barrierattr_setpshared
pthread_cancel
pthread_cleanup_pop
pthread_cleanup_push
pthread_cond_broadcast
pthread_cond_clockwait
pthread_cond_destroy
pthread_cond_init
pthread_cond_signal
pthread_cond_timedwait
pthread_cond_wait
pthread_condattr_destroy
pthread_condattr_getclock
pthread_condattr_getpshared
pthread_condattr_init
pthread_condattr_setclock
pthread_condattr_setpshared
pthread_create
pthread_detach
pthread_equal
pthread_exit
pthread_getcpuclockid
pthread_getschedparam
pthread_getspecific
pthread_join
pthread_key_create
pthread_key_delete
pthread_kill
pthread_mutex_clocklock
pthread_mutex_destroy
pthread_mutex_getprioceiling
pthread_mutex_init
pthread_mutex_lock
pthread_mutex_setprioceiling
pthread_mutex_timedlock
pthread_mutex_trylock
pthread_mutex_unlock
pthread_mutexattr_destroy
pthread_mutexattr_getprioceiling
pthread_mutexattr_getprotocol
pthread_mutexattr_getpshared
pthread_mutexattr_gettype
pthread_mutexattr_init
pthread_mutexattr_setprioceiling
pthread_mutexattr_setprotocol
pthread_mutexattr_setpshared
pthread_mutexattr_settype
pthread_once
pthread_rwlock_clockrdlock
pthread_rwlock_clockwrlock
pthread_rwlock_destroy
pthread_rwlock_init
pthread_rwlock_rdlock
pthread_rwlock_timedrdlock
pthread_rwlock_timedwrlock
pthread_rwlock_tryrdlock
pthread_rwlock_trywrlock
pthread_rwlock_unlock
pthread_rwlock_wrlock
pthread_rwlockattr_destroy
pthread_rwlockattr_getpshared
pthread_rwlockattr_init
pthread_rwlockattr_setpshared
pthread_self
pthread_setcancelstate
pthread_setcanceltype
pthread_setschedparam
pthread_setschedprio
pthread_setspecific
pthread_sigmask
pthread_spin_destroy
pthread_spin_init
pthread_spin_lock
pthread_spin_trylock
pthread_spin_unlock
pthread_testcancel
ptsname
ptsname_r
putc
putc_unlocked
putchar
putchar_unlocked
putenv
puts
pututxline
putwc
putwchar
pwrite
qsort
qsort_r (see the section called “Implementation Notes”)
quick_exit
raise
rand
random
read
readdir
readdir_r
readlink
readlinkat
readv
realloc
reallocarray
realpath
recv
recvfrom
recvmsg
regcomp
regerror
regexec
regfree
remainder
remainderf
remainderl
remove
remque
remquo
remquof
remquol
rename
renameat
rewind
rewinddir
rint
rintf
rintl
rmdir
round
roundf
roundl
scalbln
scalblnf
scalblnl
scalbn
scalbnf
scalbnl
scandir
scanf
sched_get_priority_max
sched_get_priority_min
sched_getparam
sched_getscheduler
sched_rr_get_interval
sched_setparam (see the section called “Implementation Notes”)
sched_setscheduler (see the section called “Implementation Notes”)
sched_yield
secure_getenv
seed48
seekdir
select
sem_clockwait
sem_close
sem_destroy
sem_getvalue
sem_init
sem_open
sem_post
sem_timedwait
sem_trywait
sem_unlink
sem_wait
semctl (see the section called “Implementation Notes”)
semget (see the section called “Implementation Notes”)
semop (see the section called “Implementation Notes”)
send
sendmsg
sendto
setbuf
setegid
setenv
seteuid
setgid
setgrent
sethostent
setjmp
setkey (available in external "libcrypt" library)
setlocale
setlogmask
setpgid
setpriority (see the section called “Implementation Notes”)
setprotoent
setpwent
setregid
setreuid
setrlimit (see the section called “Implementation Notes”)
setservent
setsid
setsockopt
setstate
setuid
setutxent
setvbuf
shm_open
shm_unlink
shmat (see the section called “Implementation Notes”)
shmctl (see the section called “Implementation Notes”)
shmdt (see the section called “Implementation Notes”)
shmget (see the section called “Implementation Notes”)
shutdown
sig2str
sigaction
sigaddset
sigaltstack
sigdelset
sigemptyset
sigfillset
sigismember
siglongjmp
signal
signbit (see the section called “Implementation Notes”)
signgam
sigpending
sigprocmask
sigqueue
sigsetjmp
sigsuspend
sigtimedwait
sigwait
sigwaitinfo
sin
sinf
sinh
sinhf
sinhl
sinl
sleep
snprintf
sockatmark
socket
socketpair
sprintf
sqrt
sqrtf
sqrtl
srand
srand48
srandom
sscanf
stat
statvfs
stderr
stdin
stdout
stpcpy
stpncpy
str2sig
strcasecmp
strcasecmp_l
strcat
strchr
strcmp
strcoll
strcoll_l
strcpy
strcspn
strdup
strerror
strerror_l
strerror_r (see the section called “Implementation Notes”)
strfmon
strfmon_l
strftime
strftime_l
strlcat
strlcpy
strlen
strncasecmp
strncasecmp_l
strncat
strncmp
strncpy
strndup
strnlen
strpbrk
strptime
strrchr
strsignal
strspn
strstr
strtod
strtof
strtoimax
strtok
strtok_r
strtol
strtold
strtoll
strtoul
strtoull
strtoumax
strxfrm
strxfrm_l
swab
swprintf
swscanf
symlink
symlinkat
sync
sysconf
syslog
system
tan
tanf
tanh
tanhf
tanhl
tanl
tcdrain
tcflow
tcflush
tcgetattr
tcgetpgrp
tcgetsid
tcgetwinsize
tcsendbreak
tcsetattr
tcsetpgrp
tcsetwinsize
tdelete
telldir
textdomain (available in external "libintl" library)
tfind
tgamma
tgammaf
tgammal
thrd_create
thrd_current
thrd_detach
thrd_equal
thrd_exit
thrd_join
thrd_sleep
thrd_yield
time
timer_create (see the section called “Implementation Notes”)
timer_delete
timer_getoverrun
timer_gettime
timer_settime
times
timespec_get
timezone
tmpfile
tmpnam
tolower
tolower_l
toupper
toupper_l
towctrans
towctrans_l
towlower
towlower_l
towupper
towupper_l
trunc
truncate
truncf
truncl
tsearch
tss_create
tss_delete
tss_get
tss_set
ttyname
ttyname_r
twalk
tzname
tzset
umask
uname
ungetc
ungetwc
unlink
unlinkat
unlockpt
unsetenv
uselocale
utimensat
utimes
va_arg
va_copy
va_end
va_start
vasprintf
vdprintf
vfprintf
vfscanf
vfwprintf
vfwscanf
vprintf
vscanf
vsnprintf
vsprintf
vsscanf
vswprintf
vswscanf
vwprintf
vwscanf
wait
waitpid
wcpcpy
wcpncpy
wcrtomb
wcscasecmp
wcscasecmp_l
wcscat
wcschr
wcscmp
wcscoll
wcscoll_l
wcscpy
wcscspn
wcsdup
wcsftime
wcslcat
wcslcpy
wcslen
wcsncasecmp
wcsncasecmp_l
wcsncat
wcsncmp
wcsncpy
wcsnlen
wcsnrtombs
wcspbrk
wcsrchr
wcsrtombs
wcsspn
wcsstr
wcstod
wcstof
wcstoimax
wcstok
wcstol
wcstold
wcstoll
wcstombs
wcstoul
wcstoull
wcstoumax
wcswidth
wcsxfrm
wcsxfrm_l
wctob
wctomb
wctrans
wctrans_l
wctype
wctype_l
wcwidth
wmemchr
wmemcmp
wmemcpy
wmemmove
wmemset
wordexp
wordfree
wprintf
write
writev
wscanf
y0
y1
yn