3.1. Summary#

The follow table summarizes RTEMS supported methods for all tracked standards:

Supported	1063
ENOSYS	18
Not supported	192

3.2. <aio.h>#

The following methods and variables in <aio.h> are supported:

• aio_cancel()

• aio_error()

• aio_fsync()

• aio_read()

• aio_return()

• aio_write()

• lio_listio()

The following methods in <aio.h> are implemented as stubs returning -1 and setting errno to ENOSYS:

• aio_suspend()

3.3. <arpa/inet.h>#

The following methods and variables in <arpa/inet.h> are supported:

• htonl()

• htons()

• inet_addr()

• inet_ntoa()

• inet_ntop()

• inet_pton()

• ntohl()

• ntohs()

3.4. <assert.h>#

The following methods and variables in <assert.h> are supported:

• assert()

3.5. <complex.h>#

The following methods and variables in <complex.h> are supported:

• cabs()

• cabsf()

• cabsl()

• cacos()

• cacosf()

• cacosh()

• cacoshf()

• cacoshl()

• cacosl()

• carg()

• cargf()

• cargl()

• casin()

• casinf()

• casinh()

• casinhf()

• casinhl()

• casinl()

• catan()

• catanf()

• catanh()

• catanhf()

• catanhl()

• catanl()

• ccos()

• ccosf()

• ccosh()

• ccoshf()

• ccoshl()

• ccosl()

• cexp()

• cexpf()

• cexpl()

• cimag()

• cimagf()

• cimagl()

• clog()

• clogf()

• clogl()

• conj()

• conjf()

• conjl()

• cpow()

• cpowf()

• cpowl()

• cproj()

• cprojf()

• cprojl()

• creal()

• crealf()

• creall()

• csin()

• csinf()

• csinh()

• csinhf()

• csinhl()

• csinl()

• csqrt()

• csqrtf()

• csqrtl()

• ctan()

• ctanf()

• ctanh()

• ctanhf()

• ctanhl()

• ctanl()

3.6. <ctype.h>#

The following methods and variables in <ctype.h> are supported:

• _tolower()

• _toupper()

• isalnum()

• isalnum_l()

• isalpha()

• isalpha_l()

• isascii()

• isblank()

• isblank_l()

• iscntrl()

• iscntrl_l()

• isdigit()

• isdigit_l()

• isgraph()

• isgraph_l()

• islower()

• islower_l()

• isprint()

• isprint_l()

• ispunct()

• ispunct_l()

• isspace()

• isspace_l()

• isupper()

• isupper_l()

• isxdigit()

• isxdigit_l()

• toascii()

• tolower()

• tolower_l()

• toupper()

• toupper_l()

3.7. <devctl.h>#

The following methods and variables in <devctl.h> are supported:

• posix_devctl()

3.8. <dirent.h>#

The following methods and variables in <dirent.h> are supported:

• alphasort()

• closedir()

• fdopendir()

• opendir()

• readdir()

• readdir_r()

• rewinddir()

• scandir()

• seekdir()

• telldir()

The following methods and variables in <dirent.h> are not supported:

• dirfd()

3.9. <dlfcn.h>#

The following methods and variables in <dlfcn.h> are supported:

• dlclose()

• dlerror()

• dlopen()

• dlsym()

3.10. <errno.h>#

The following methods and variables in <errno.h> are supported:

• errno

3.11. <fcntl.h>#

The following methods and variables in <fcntl.h> are supported:

• creat()

• fcntl()

• open()

The following methods and variables in <fcntl.h> are not supported:

• openat()

• posix_fadvise()

• posix_fallocate()

• posix_openpt()

3.12. <fenv.h>#

The following methods and variables in <fenv.h> are supported:

• feclearexcept()

• fegetenv()

• fegetexceptflag()

• fegetround()

• feholdexcept()

• feraiseexcept()

• fesetenv()

• fesetexceptflag()

• fesetround()

• fetestexcept()

• feupdateenv()

3.13. <fmtmsg.h>#

The following methods and variables in <fmtmsg.h> are not supported:

• fmtmsg()

3.14. <fnmatch.h>#

The following methods and variables in <fnmatch.h> are supported:

• fnmatch()

3.15. <ftw.h>#

The following methods and variables in <ftw.h> are supported:

• ftw()

• nftw()

3.16. <glob.h>#

The following methods and variables in <glob.h> are supported:

• glob()

• globfree()

3.17. <grp.h>#

The following methods and variables in <grp.h> are supported:

• endgrent()

• getgrent()

• getgrgid()

• getgrgid_r()

• getgrnam()

• getgrnam_r()

• setgrent()

3.18. <iconv.h>#

The following methods and variables in <iconv.h> are supported:

• iconv()

• iconv_close()

• iconv_open()

3.19. <inttypes.h>#

The following methods and variables in <inttypes.h> are supported:

• imaxabs()

• imaxdiv()

• strtoimax()

• strtoumax()

• wcstoimax()

• wcstoumax()

3.20. <langinfo.h>#

The following methods and variables in <langinfo.h> are supported:

• nl_langinfo()

• nl_langinfo_l()

3.21. <libgen.h>#

The following methods and variables in <libgen.h> are supported:

• basename()

• dirname()

3.22. <libintl.h>#

The following methods and variables in <libintl.h> are supported:

• textdomain()

3.23. <locale.h>#

The following methods and variables in <locale.h> are supported:

• duplocale()

• freelocale()

• localeconv()

• newlocale()

• setlocale()

• uselocale()

3.24. <math.h>#

The following methods and variables in <math.h> are supported:

• acos()

• acosf()

• acosh()

• acoshf()

• acoshl()

• acosl()

• asin()

• asinf()

• asinh()

• asinhf()

• asinhl()

• asinl()

• atan()

• atan2()

• atan2f()

• atan2l()

• atanf()

• atanh()

• atanhf()

• atanhl()

• atanl()

• cbrt()

• cbrtf()

• cbrtl()

• ceil()

• ceilf()

• ceill()

• copysign()

• copysignf()

• copysignl()

• cos()

• cosf()

• cosh()

• coshf()

• coshl()

• cosl()

• erf()

• erfc()

• erfcf()

• erfcl()

• erff()

• erfl()

• exp()

• exp2()

• exp2f()

• exp2l()

• expf()

• expl()

• expm1()

• expm1f()

• expm1l()

• fabs()

• fabsf()

• fabsl()

• fdim()

• fdimf()

• fdiml()

• floor()

• floorf()

• floorl()

• fma()

• fmaf()

• fmal()

• fmax()

• fmaxf()

• fmaxl()

• fmin()

• fminf()

• fminl()

• fmod()

• fmodf()

• fmodl()

• fpclassify()

• frexp()

• frexpf()

• frexpl()

• hypot()

• hypotf()

• hypotl()

• ilogb()

• ilogbf()

• ilogbl()

• isfinite()

• isgreater()

• isgreaterequal()

• isinf()

• isless()

• islessequal()

• islessgreater()

• isnan()

• isnormal()

• isunordered()

• ldexp()

• ldexpf()

• ldexpl()

• lgamma()

• lgammaf()

• lgammal()

• llrint()

• llrintf()

• llrintl()

• llround()

• llroundf()

• llroundl()

• log()

• log10()

• log10f()

• log10l()

• log1p()

• log1pf()

• log1pl()

• log2()

• log2f()

• log2l()

• logb()

• logbf()

• logbl()

• logf()

• logl()

• lrint()

• lrintf()

• lrintl()

• lround()

• lroundf()

• lroundl()

• modf()

• modff()

• modfl()

• nan()

• nanf()

• nanl()

• nearbyint()

• nearbyintf()

• nearbyintl()

• nextafter()

• nextafterf()

• nextafterl()

• nexttoward()

• nexttowardf()

• nexttowardl()

• pow()

• powf()

• powl()

• remainder()

• remainderf()

• remainderl()

• remquo()

• remquof()

• remquol()

• rint()

• rintf()

• rintl()

• round()

• roundf()

• roundl()

• scalb()

• scalbln()

• scalblnf()

• scalblnl()

• scalbn()

• scalbnf()

• scalbnl()

• sin()

• sinf()

• sinh()

• sinhf()

• sinhl()

• sinl()

• sqrt()

• sqrtf()

• sqrtl()

• tan()

• tanf()

• tanh()

• tanhf()

• tanhl()

• tanl()

• tgamma()

• tgammaf()

• tgammal()

• trunc()

• truncf()

• truncl()

The following methods and variables in <math.h> are not supported:

• j0()

• j1()

• jn()

• signbit()

• signgam

• y0()

• y1()

• yn()

3.25. <monetary.h>#

The following methods and variables in <monetary.h> are not supported:

• strfmon()

• strfmon_l()

3.26. <mqueue.h>#

The following methods and variables in <mqueue.h> are supported:

• mq_close()

• mq_getattr()

• mq_notify()

• mq_open()

• mq_receive()

• mq_send()

• mq_setattr()

• mq_timedreceive()

• mq_timedsend()

• mq_unlink()

3.27. <ndbm.h>#

The following methods and variables in <ndbm.h> are supported:

• dbm_clearerr()

• dbm_close()

• dbm_delete()

• dbm_error()

• dbm_fetch()

• dbm_firstkey()

• dbm_nextkey()

• dbm_open()

• dbm_store()

3.28. <net/if.h>#

The following methods and variables in <net/if.h> are supported:

• if_freenameindex()

• if_indextoname()

• if_nameindex()

• if_nametoindex()

3.29. <netdb.h>#

The following methods and variables in <netdb.h> are supported:

• endhostent()

• endnetent()

• endprotoent()

• endservent()

• freeaddrinfo()

• gai_strerror()

• getaddrinfo()

• gethostbyaddr()

• gethostbyname()

• gethostent()

• getnameinfo()

• getnetbyaddr()

• getnetbyname()

• getnetent()

• getprotobyname()

• getprotobynumber()

• getprotoent()

• getservbyname()

• getservbyport()

• getservent()

• h_errno

• sethostent()

• setnetent()

• setprotoent()

• setservent()

3.30. <nl_types.h>#

The following methods and variables in <nl_types.h> are not supported:

• catclose()

• catgets()

• catopen()

3.31. <poll.h>#

The following methods and variables in <poll.h> are supported:

• poll()

3.32. <pthread.h>#

The following methods and variables in <pthread.h> are supported:

• 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_getstackaddr()

• 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_setstackaddr()

• 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_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_getconcurrency()

• pthread_getschedparam()

• pthread_getspecific()

• pthread_join()

• pthread_key_create()

• pthread_key_delete()

• 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_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_setconcurrency()

• pthread_setschedparam()

• pthread_setschedprio()

• pthread_setspecific()

• pthread_spin_destroy()

• pthread_spin_init()

• pthread_spin_lock()

• pthread_spin_trylock()

• pthread_spin_unlock()

• pthread_testcancel()

The following methods in <pthread.h> are implemented as stubs returning -1 and setting errno to ENOSYS:

• pthread_atfork()

• pthread_getcpuclockid()

The following methods and variables in <pthread.h> are not supported:

• pthread_mutex_consistent()

• pthread_mutexattr_getrobust()

• pthread_mutexattr_setrobust()

3.33. <pwd.h>#

The following methods and variables in <pwd.h> are supported:

• endpwent()

• getpwent()

• getpwnam()

• getpwnam_r()

• getpwuid()

• getpwuid_r()

• setpwent()

3.34. <regex.h>#

The following methods and variables in <regex.h> are supported:

• regcomp()

• regerror()

• regexec()

• regfree()

3.35. <sched.h>#

The following methods and variables in <sched.h> are supported:

• sched_get_priority_max()

• sched_get_priority_min()

• sched_rr_get_interval()

• sched_yield()

The following methods in <sched.h> are implemented as stubs returning -1 and setting errno to ENOSYS:

• sched_getparam()

• sched_getscheduler()

• sched_setparam()

• sched_setscheduler()

3.36. <search.h>#

The following methods and variables in <search.h> are supported:

• hcreate()

• hdestroy()

• hsearch()

• tdelete()

• tfind()

• tsearch()

• twalk()

The following methods and variables in <search.h> are not supported:

• insque()

• lfind()

• lsearch()

• remque()

3.37. <semaphore.h>#

The following methods and variables in <semaphore.h> are supported:

• sem_close()

• sem_destroy()

• sem_getvalue()

• sem_init()

• sem_open()

• sem_post()

• sem_timedwait()

• sem_trywait()

• sem_unlink()

• sem_wait()

3.38. <setjmp.h>#

The following methods and variables in <setjmp.h> are supported:

• longjmp()

• setjmp()

• siglongjmp()

• sigsetjmp()

The following methods and variables in <setjmp.h> are not supported:

• _longjmp()

• _setjmp()

3.39. <signal.h>#

The following methods and variables in <signal.h> are supported:

• bsd_signal()

• kill()

• psignal()

• pthread_kill()

• pthread_sigmask()

• raise()

• sig2str()

• sigaction()

• sigaddset()

• sigdelset()

• sigemptyset()

• sigfillset()

• sigismember()

• signal()

• sigpending()

• sigprocmask()

• sigqueue()

• sigsuspend()

• sigtimedwait()

• sigwait()

• sigwaitinfo()

The following methods and variables in <signal.h> are not supported:

• killpg()

• psiginfo()

• sigaltstack()

• sighold()

• sigignore()

• siginterrupt()

• sigpause()

• sigrelse()

• sigset()

3.40. <spawn.h>#

The following methods and variables in <spawn.h> are not supported:

• posix_spawn()

• posix_spawn_file_actions_addclose()

• posix_spawn_file_actions_adddup2()

• 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()

3.41. <stdarg.h>#

The following methods and variables in <stdarg.h> are supported:

• va_arg()

• va_copy()

• va_end()

• va_start()

3.42. <stdatomic.h>#

The following methods and variables in <stdatomic.h> are supported:

• ATOMIC_VAR_INIT()

• 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_key()

• atomic_fetch_key_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()

3.43. <stddef.h>#

The following methods and variables in <stddef.h> are supported:

• offsetof()

3.44. <stdint.h>#

The following methods and variables in <stdint.h> are supported:

• INTMAX_C()

• INTN_C()

• UINTMAX_C()

• UINTN_C()

3.45. <stdio.h>#

The following methods and variables in <stdio.h> are supported:

• clearerr()

• ctermid()

• dprintf()

• fclose()

• fdopen()

• feof()

• ferror()

• fflush()

• fgetc()

• fgetpos()

• fgets()

• fileno()

• flockfile()

• fmemopen()

• fopen()

• fprintf()

• fputc()

• fputs()

• fread()

• freopen()

• fscanf()

• fseek()

• fseeko()

• fsetpos()

• ftell()

• ftello()

• ftrylockfile()

• funlockfile()

• fwrite()

• getc()

• getc_unlocked()

• getchar()

• getchar_unlocked()

• gets()

• open_memstream()

• perror()

• printf()

• putc()

• putc_unlocked()

• putchar()

• putchar_unlocked()

• puts()

• remove()

• rename()

• rewind()

• scanf()

• setbuf()

• setvbuf()

• snprintf()

• sprintf()

• sscanf()

• stderr

• stdin

• stdout

• tempnam()

• tmpfile()

• tmpnam()

• ungetc()

• vdprintf()

• vfprintf()

• vfscanf()

• vprintf()

• vscanf()

• vsnprintf()

• vsprintf()

• vsscanf()

The following methods and variables in <stdio.h> are not supported:

• getdelim()

• getline()

• pclose()

• popen()

• renameat()

3.46. <stdlib.h>#

The following methods and variables in <stdlib.h> are supported:

• _Exit()

• a64l()

• abort()

• abs()

• aligned_alloc()

• atexit()

• atof()

• atoi()

• atol()

• atoll()

• bsearch()

• calloc()

• div()

• drand48()

• ecvt()

• erand48()

• exit()

• fcvt()

• free()

• gcvt()

• getenv()

• getsubopt()

• jrand48()

• l64a()

• labs()

• lcong48()

• ldiv()

• llabs()

• lldiv()

• lrand48()

• malloc()

• mblen()

• mbstowcs()

• mbtowc()

• mkdtemp()

• mkstemp()

• mktemp()

• mktime()

• mrand48()

• nrand48()

• posix_memalign()

• putenv()

• qsort()

• qsort_r()

• quick_exit()

• rand()

• rand_r()

• random()

• realloc()

• reallocarray()

• realpath()

• seed48()

• setenv()

• srand()

• srand48()

• srandom()

• strtod()

• strtof()

• strtol()

• strtold()

• strtoll()

• strtoul()

• strtoull()

• unsetenv()

• wcstombs()

• wctomb()

The following methods in <stdlib.h> are implemented as stubs returning -1 and setting errno to ENOSYS:

• system()

The following methods and variables in <stdlib.h> are not supported:

• grantpt()

• initstate()

• ptsname()

• setkey()

• setstate()

• unlockpt()

3.47. <string.h>#

The following methods and variables in <string.h> are supported:

• memccpy()

• memchr()

• memcmp()

• memcpy()

• memmem()

• memmove()

• memset()

• stpcpy()

• stpncpy()

• strcat()

• strchr()

• strcmp()

• strcoll()

• strcoll_l()

• strcpy()

• strcspn()

• strdup()

• strerror()

• strerror_l()

• strerror_r()

• strlcat()

• strlcpy()

• strlen()

• strncat()

• strncmp()

• strncpy()

• strndup()

• strnlen()

• strpbrk()

• strrchr()

• strsignal()

• strspn()

• strstr()

• strtok()

• strtok_r()

• strxfrm()

• strxfrm_l()

3.48. <strings.h>#

The following methods and variables in <strings.h> are supported:

• bcmp()

• bcopy()

• bzero()

• ffs()

• ftime()

• index()

• rindex()

• strcasecmp()

• strcasecmp_l()

• strncasecmp()

• strncasecmp_l()

3.49. <stropts.h>#

The following methods and variables in <stropts.h> are supported:

• ioctl()

The following methods and variables in <stropts.h> are not supported:

• fattach()

• fdetach()

• getmsg()

• getpmsg()

• isastream()

• putmsg()

• putpmsg()

3.50. <sys/ipc.h>#

The following methods and variables in <sys/ipc.h> are not supported:

• ftok()

3.51. <sys/mman.h>#

The following methods and variables in <sys/mman.h> are supported:

• mlock()

• mlockall()

• mmap()

• mprotect()

• msync()

• munlock()

• munlockall()

• munmap()

• posix_madvise()

• shm_open()

• shm_unlink()

The following methods and variables in <sys/mman.h> are not supported:

• posix_mem_offset()

• posix_typed_mem_get_info()

• posix_typed_mem_open()

3.52. <sys/msg.h>#

The following methods and variables in <sys/msg.h> are not supported:

• msgctl()

• msgget()

• msgrcv()

• msgsnd()

3.53. <sys/resource.h>#

The following methods and variables in <sys/resource.h> are supported:

• getrusage()

The following methods and variables in <sys/resource.h> are not supported:

• getpriority()

• getrlimit()

• setpriority()

• setrlimit()

3.54. <sys/select.h>#

The following methods and variables in <sys/select.h> are supported:

• FD_CLR()

• FD_ISSET()

• FD_SET()

• FD_ZERO()

• select()

The following methods and variables in <sys/select.h> are not supported:

• pselect()

3.55. <sys/sem.h>#

The following methods and variables in <sys/sem.h> are not supported:

• semctl()

• semget()

• semop()

3.56. <sys/shm.h>#

The following methods and variables in <sys/shm.h> are not supported:

• shmat()

• shmctl()

• shmdt()

• shmget()

3.57. <sys/socket.h>#

The following methods and variables in <sys/socket.h> are supported:

• accept()

• bind()

• connect()

• getpeername()

• getsockname()

• getsockopt()

• listen()

• recv()

• recvfrom()

• recvmsg()

• send()

• sendmsg()

• sendto()

• setsockopt()

• shutdown()

• socket()

• socketpair()

The following methods and variables in <sys/socket.h> are not supported:

• sockatmark()

3.58. <sys/stat.h>#

The following methods and variables in <sys/stat.h> are supported:

• chmod()

• fchmod()

• fstat()

• lstat()

• mkdir()

• mkfifo()

• mknod()

• stat()

• umask()

The following methods and variables in <sys/stat.h> are not supported:

• fchmodat()

• fstatat()

• futimens()

• mkdirat()

• mkfifoat()

• mknodat()

• utimensat()

3.59. <sys/statvfs.h>#

The following methods and variables in <sys/statvfs.h> are supported:

• statvfs()

The following methods and variables in <sys/statvfs.h> are not supported:

• fstatvfs()

3.60. <sys/time.h>#

The following methods and variables in <sys/time.h> are supported:

• gettimeofday()

• times()

• utimes()

The following methods in <sys/time.h> are implemented as stubs returning -1 and setting errno to ENOSYS:

• getitimer()

• setitimer()

3.61. <sys/uio.h>#

The following methods and variables in <sys/uio.h> are supported:

• readv()

• writev()

3.62. <sys/utsname.h>#

The following methods and variables in <sys/utsname.h> are supported:

• uname()

3.63. <sys/wait.h>#

The following methods and variables in <sys/wait.h> are supported:

• wait()

• waitpid()

The following methods and variables in <sys/wait.h> are not supported:

• waitid()

3.64. <syslog.h>#

The following methods and variables in <syslog.h> are not supported:

• closelog()

• openlog()

• setlogmask()

• syslog()

3.65. <termios.h>#

The following methods and variables in <termios.h> are supported:

• cfgetispeed()

• cfgetospeed()

• cfsetispeed()

• cfsetospeed()

• tcdrain()

• tcflow()

• tcflush()

• tcgetattr()

• tcsendbreak()

• tcsetattr()

The following methods and variables in <termios.h> are not supported:

• tcgetsid()

3.66. <threads.h>#

The following methods and variables in <threads.h> are supported:

• call_once()

• cnd_broadcast()

• cnd_destroy()

• cnd_init()

• cnd_signal()

• cnd_timedwait()

• cnd_wait()

• mtx_destroy()

• mtx_init()

• mtx_lock()

• mtx_timedlock()

• mtx_trylock()

• mtx_unlock()

• thrd_create()

• thrd_current()

• thrd_detach()

• thrd_equal()

• thrd_exit()

• thrd_join()

• thrd_sleep()

• thrd_yield()

• tss_create()

• tss_delete()

• tss_get()

• tss_set()

3.67. <time.h>#

The following methods and variables in <time.h> are supported:

• asctime()

• asctime_r()

• clock()

• clock_getres()

• clock_gettime()

• clock_nanosleep()

• clock_settime()

• ctime()

• ctime_r()

• difftime()

• gmtime()

• gmtime_r()

• localtime()

• localtime_r()

• nanosleep()

• strftime()

• strftime_l()

• strptime()

• time()

• timer_create()

• timer_delete()

• timer_getoverrun()

• timer_gettime()

• timer_settime()

• timezone

• tzname

• tzset()

The following methods in <time.h> are implemented as stubs returning -1 and setting errno to ENOSYS:

• clock_getcpuclockid()

The following methods and variables in <time.h> are not supported:

• daylight

• getdate()

• getdate_err

3.68. <trace.h>#

The following methods and variables in <trace.h> are not supported:

• posix_trace_attr_destroy()

• posix_trace_attr_getclockres()

• posix_trace_attr_getcreatetime()

• posix_trace_attr_getgenversion()

• posix_trace_attr_getinherited()

• posix_trace_attr_getlogfullpolicy()

• posix_trace_attr_getlogsize()

• posix_trace_attr_getmaxdatasize()

• posix_trace_attr_getmaxsystemeventsize()

• posix_trace_attr_getmaxusereventsize()

• posix_trace_attr_getname()

• posix_trace_attr_getstreamfullpolicy()

• posix_trace_attr_getstreamsize()

• posix_trace_attr_init()

• posix_trace_attr_setinherited()

• posix_trace_attr_setlogfullpolicy()

• posix_trace_attr_setlogsize()

• posix_trace_attr_setmaxdatasize()

• posix_trace_attr_setname()

• posix_trace_attr_setstreamfullpolicy()

• posix_trace_attr_setstreamsize()

• posix_trace_clear()

• posix_trace_close()

• posix_trace_create()

• posix_trace_create_withlog()

• posix_trace_event()

• posix_trace_eventid_equal()

• posix_trace_eventid_get_name()

• posix_trace_eventid_open()

• posix_trace_eventset_add()

• posix_trace_eventset_del()

• posix_trace_eventset_empty()

• posix_trace_eventset_fill()

• posix_trace_eventset_ismember()

• posix_trace_eventtypelist_getnext_id()

• posix_trace_eventtypelist_rewind()

• posix_trace_flush()

• posix_trace_get_attr()

• posix_trace_get_filter()

• posix_trace_get_status()

• posix_trace_getnext_event()

• posix_trace_open()

• posix_trace_rewind()

• posix_trace_set_filter()

• posix_trace_shutdown()

• posix_trace_start()

• posix_trace_stop()

• posix_trace_timedgetnext_event()

• posix_trace_trid_eventid_open()

• posix_trace_trygetnext_event()

3.69. <ulimit.h>#

The following methods and variables in <ulimit.h> are not supported:

• ulimit()

3.70. <unistd.h>#

The following methods and variables in <unistd.h> are supported:

• _exit()

• access()

• alarm()

• chdir()

• chown()

• close()

• dup()

• dup2()

• environ

• fchdir()

• fchown()

• fdatasync()

• fpathconf()

• fsync()

• ftruncate()

• getcwd()

• getegid()

• geteuid()

• getgid()

• getgroups()

• gethostname()

• getlogin()

• getlogin_r()

• getopt()

• getpgrp()

• getpid()

• getppid()

• getuid()

• isatty()

• lchown()

• link()

• lseek()

• optarg

• opterr

• optind

• optopt

• pathconf()

• pause()

• pipe()

• pread()

• pwrite()

• read()

• readlink()

• rmdir()

• setegid()

• seteuid()

• setgid()

• setpgid()

• setsid()

• setuid()

• sleep()

• swab()

• symlink()

• sync()

• sysconf()

• tcgetpgrp()

• tcsetpgrp()

• truncate()

• ttyname()

• ttyname_r()

• ualarm()

• unlink()

• usleep()

• write()

The following methods in <unistd.h> are implemented as stubs returning -1 and setting errno to ENOSYS:

• execl()

• execle()

• execlp()

• execv()

• execve()

• execvp()

• fork()

The following methods and variables in <unistd.h> are not supported:

• confstr()

• crypt()

• encrypt()

• faccessat()

• fchownat()

• fexecve()

• gethostid()

• getpgid()

• getsid()

• linkat()

• lockf()

• nice()

• readlinkat()

• setpgrp()

• setregid()

• setreuid()

• symlinkat()

• unlinkat()

3.71. <utime.h>#

The following methods and variables in <utime.h> are supported:

• utime()

3.72. <utmpx.h>#

The following methods and variables in <utmpx.h> are not supported:

• endutxent()

• getutxent()

• getutxid()

• getutxline()

• pututxline()

• setutxent()

3.73. <wchar.h>#

The following methods and variables in <wchar.h> are supported:

• btowc()

• fgetwc()

• fgetws()

• fputwc()

• fputws()

• fwide()

• fwprintf()

• fwscanf()

• getwc()

• getwchar()

• mbrlen()

• mbrtowc()

• mbsinit()

• mbsnrtowcs()

• mbsrtowcs()

• open_wmemstream()

• putwc()

• putwchar()

• swprintf()

• swscanf()

• ungetwc()

• vfwprintf()

• vfwscanf()

• vswprintf()

• vswscanf()

• vwprintf()

• vwscanf()

• wcpcpy()

• wcpncpy()

• wcrtomb()

• wcscasecmp()

• wcscasecmp_l()

• wcscat()

• wcschr()

• wcscmp()

• wcscoll()

• wcscoll_l()

• wcscpy()

• wcscspn()

• wcsdup()

• wcsftime()

• wcslcat()

• wcslcpy()

• wcslen()

• wcsncasecmp()

• wcsncat()

• wcsncmp()

• wcsncpy()

• wcsnlen()

• wcsnrtombs()

• wcspbrk()

• wcsrchr()

• wcsrtombs()

• wcsspn()

• wcsstr()

• wcstod()

• wcstof()

• wcstok()

• wcstol()

• wcstold()

• wcstoll()

• wcstoul()

• wcstoull()

• wcswidth()

• wcsxfrm()

• wcsxfrm_l()

• wctob()

• wcwidth()

• wmemchr()

• wmemcmp()

• wmemcpy()

• wmemmove()

• wmemset()

• wprintf()

• wscanf()

The following methods and variables in <wchar.h> are not supported:

• wcsncasemcp_l()

3.74. <wctype.h>#

The following methods and variables in <wctype.h> are supported:

• 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()

• towctrans()

• towctrans_l()

• towlower()

• towlower_l()

• towupper()

• towupper_l()

• wctrans()

• wctrans_l()

• wctype()

• wctype_l()

3.75. <wordexp.h>#

The following methods and variables in <wordexp.h> are not supported:

• wordexp()

• wordfree()

4.1. Summary#

The follow table summarizes alignment with the POSIX-2024 (Issue 8) standard:

Supported	1030
ENOSYS	16
Not supported	125

4.2. <aio.h>#

The following methods and variables in <aio.h> are supported:

• aio_cancel()

• aio_error()

• aio_fsync()

• aio_read()

• aio_return()

• aio_write()

• lio_listio()

The following methods in <aio.h> are implemented as stubs returning -1 and setting errno to ENOSYS:

• aio_suspend()

4.3. <arpa/inet.h>#

The following methods and variables in <arpa/inet.h> are supported:

• htonl()

• htons()

• inet_addr()

• inet_ntoa()

• inet_ntop()

• inet_pton()

• ntohl()

• ntohs()

4.4. <assert.h>#

The following methods and variables in <assert.h> are supported:

• assert()

4.5. <complex.h>#

The following methods and variables in <complex.h> are supported:

• cabs()

• cabsf()

• cabsl()

• cacos()

• cacosf()

• cacosh()

• cacoshf()

• cacoshl()

• cacosl()

• carg()

• cargf()

• cargl()

• casin()

• casinf()

• casinh()

• casinhf()

• casinhl()

• casinl()

• catan()

• catanf()

• catanh()

• catanhf()

• catanhl()

• catanl()

• ccos()

• ccosf()

• ccosh()

• ccoshf()

• ccoshl()

• ccosl()

• cexp()

• cexpf()

• cexpl()

• cimag()

• cimagf()

• cimagl()

• clog()

• clogf()

• clogl()

• conj()

• conjf()

• conjl()

• cpow()

• cpowf()

• cpowl()

• cproj()

• cprojf()

• cprojl()

• creal()

• crealf()

• creall()

• csin()

• csinf()

• csinh()

• csinhf()

• csinhl()

• csinl()

• csqrt()

• csqrtf()

• csqrtl()

• ctan()

• ctanf()

• ctanh()

• ctanhf()

• ctanhl()

• ctanl()

4.6. <ctype.h>#

The following methods and variables in <ctype.h> are supported:

• isalnum()

• isalnum_l()

• isalpha()

• isalpha_l()

• isblank()

• isblank_l()

• iscntrl()

• iscntrl_l()

• isdigit()

• isdigit_l()

• isgraph()

• isgraph_l()

• islower()

• islower_l()

• isprint()

• isprint_l()

• ispunct()

• ispunct_l()

• isspace()

• isspace_l()

• isupper()

• isupper_l()

• isxdigit()

• isxdigit_l()

• tolower()

• tolower_l()

• toupper()

• toupper_l()

4.7. <dirent.h>#

The following methods and variables in <dirent.h> are supported:

• alphasort()

• closedir()

• fdopendir()

• opendir()

• readdir()

• readdir_r()

• rewinddir()

• scandir()

• seekdir()

• telldir()

The following methods and variables in <dirent.h> are not supported:

• dirfd()

4.8. <dlfcn.h>#

The following methods and variables in <dlfcn.h> are supported:

• dlclose()

• dlerror()

• dlopen()

• dlsym()

4.9. <errno.h>#

The following methods and variables in <errno.h> are supported:

• errno

4.10. <fcntl.h>#

The following methods and variables in <fcntl.h> are supported:

• creat()

• fcntl()

• open()

The following methods and variables in <fcntl.h> are not supported:

• openat()

• posix_fadvise()

• posix_fallocate()

• posix_openpt()

4.11. <fenv.h>#

The following methods and variables in <fenv.h> are supported:

• feclearexcept()

• fegetenv()

• fegetexceptflag()

• fegetround()

• feholdexcept()

• feraiseexcept()

• fesetenv()

• fesetexceptflag()

• fesetround()

• fetestexcept()

• feupdateenv()

4.12. <fmtmsg.h>#

The following methods and variables in <fmtmsg.h> are not supported:

• fmtmsg()

4.13. <fnmatch.h>#

The following methods and variables in <fnmatch.h> are supported:

• fnmatch()

4.14. <ftw.h>#

The following methods and variables in <ftw.h> are supported:

• nftw()

4.15. <glob.h>#

The following methods and variables in <glob.h> are supported:

• glob()

• globfree()

4.16. <grp.h>#

The following methods and variables in <grp.h> are supported:

• endgrent()

• getgrent()

• getgrgid()

• getgrgid_r()

• getgrnam()

• getgrnam_r()

• setgrent()

4.17. <iconv.h>#

The following methods and variables in <iconv.h> are supported:

• iconv()

• iconv_close()

• iconv_open()

4.18. <inttypes.h>#

The following methods and variables in <inttypes.h> are supported:

• imaxabs()

• imaxdiv()

• strtoimax()

• strtoumax()

• wcstoimax()

• wcstoumax()

4.19. <langinfo.h>#

The following methods and variables in <langinfo.h> are supported:

• nl_langinfo()

• nl_langinfo_l()

4.20. <libgen.h>#

The following methods and variables in <libgen.h> are supported:

• basename()

• dirname()

4.21. <libintl.h>#

The following methods and variables in <libintl.h> are supported:

• textdomain()

4.22. <locale.h>#

The following methods and variables in <locale.h> are supported:

• duplocale()

• freelocale()

• localeconv()

• newlocale()

• setlocale()

• uselocale()

4.23. <math.h>#

The following methods and variables in <math.h> are supported:

• acos()

• acosf()

• acosh()

• acoshf()

• acoshl()

• acosl()

• asin()

• asinf()

• asinh()

• asinhf()

• asinhl()

• asinl()

• atan()

• atan2()

• atan2f()

• atan2l()

• atanf()

• atanh()

• atanhf()

• atanhl()

• atanl()

• cbrt()

• cbrtf()

• cbrtl()

• ceil()

• ceilf()

• ceill()

• copysign()

• copysignf()

• copysignl()

• cos()

• cosf()

• cosh()

• coshf()

• coshl()

• cosl()

• erf()

• erfc()

• erfcf()

• erfcl()

• erff()

• erfl()

• exp()

• exp2()

• exp2f()

• exp2l()

• expf()

• expl()

• expm1()

• expm1f()

• expm1l()

• fabs()

• fabsf()

• fabsl()

• fdim()

• fdimf()

• fdiml()

• floor()

• floorf()

• floorl()

• fma()

• fmaf()

• fmal()

• fmax()

• fmaxf()

• fmaxl()

• fmin()

• fminf()

• fminl()

• fmod()

• fmodf()

• fmodl()

• fpclassify()

• frexp()

• frexpf()

• frexpl()

• hypot()

• hypotf()

• hypotl()

• ilogb()

• ilogbf()

• ilogbl()

• isfinite()

• isgreater()

• isgreaterequal()

• isinf()

• isless()

• islessequal()

• islessgreater()

• isnan()

• isnormal()

• isunordered()

• ldexp()

• ldexpf()

• ldexpl()

• lgamma()

• lgammaf()

• lgammal()

• llrint()

• llrintf()

• llrintl()

• llround()

• llroundf()

• llroundl()

• log()

• log10()

• log10f()

• log10l()

• log1p()

• log1pf()

• log1pl()

• log2()

• log2f()

• log2l()

• logb()

• logbf()

• logbl()

• logf()

• logl()

• lrint()

• lrintf()

• lrintl()

• lround()

• lroundf()

• lroundl()

• modf()

• modff()

• modfl()

• nan()

• nanf()

• nanl()

• nearbyint()

• nearbyintf()

• nearbyintl()

• nextafter()

• nextafterf()

• nextafterl()

• nexttoward()

• nexttowardf()

• nexttowardl()

• pow()

• powf()

• powl()

• remainder()

• remainderf()

• remainderl()

• remquo()

• remquof()

• remquol()

• rint()

• rintf()

• rintl()

• round()

• roundf()

• roundl()

• scalbln()

• scalblnf()

• scalblnl()

• scalbn()

• scalbnf()

• scalbnl()

• sin()

• sinf()

• sinh()

• sinhf()

• sinhl()

• sinl()

• sqrt()

• sqrtf()

• sqrtl()

• tan()

• tanf()

• tanh()

• tanhf()

• tanhl()

• tanl()

• tgamma()

• tgammaf()

• tgammal()

• trunc()

• truncf()

• truncl()

The following methods and variables in <math.h> are not supported:

• j0()

• j1()

• jn()

• signbit()

• signgam

• y0()

• y1()

• yn()

4.24. <monetary.h>#

The following methods and variables in <monetary.h> are not supported:

• strfmon()

• strfmon_l()

4.25. <mqueue.h>#

The following methods and variables in <mqueue.h> are supported:

• mq_close()

• mq_getattr()

• mq_notify()

• mq_open()

• mq_receive()

• mq_send()

• mq_setattr()

• mq_timedreceive()

• mq_timedsend()

• mq_unlink()

4.26. <ndbm.h>#

The following methods and variables in <ndbm.h> are supported:

• dbm_clearerr()

• dbm_close()

• dbm_delete()

• dbm_error()

• dbm_fetch()

• dbm_firstkey()

• dbm_nextkey()

• dbm_open()

• dbm_store()