F

Updated: October 28, 2024
Function Classification Library Cancel ISR Signal Thread
fabs() C11, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
fabsf() C11, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
fabsl() C11, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
faccessat() POSIX 2008 libc No No Yes Yes
fcfgopen() QNX Neutrino libc Yes No Yes Yes
fchdir() POSIX 1003.1 libc No No Yes Yes
fchecktrust() QNX Neutrino libc No No Yes Yes
fchmod() POSIX 1003.1 libc No No Yes Yes
fchmodat() POSIX 2008 libc No No Yes Yes
fchown() POSIX 1003.1 libc No No Yes Yes
fchownat() POSIX 2008 libc No No Yes Yes
fclose() ANSI, POSIX 1003.1 libc Yes No No Yes
fcloseall() QNX Neutrino libc Yes No No Yes
fcntl() POSIX 1003.1 libc Read the Caveats No Yes Yes
fdatasync() POSIX 1003.1 SIO libc Yes No Yes Yes
fdim() C11, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
fdimf() C11, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
fdiml() C11, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
fdistrusted() QNX Neutrino libc No No Yes Yes
fdopen() POSIX 1003.1 libc No No No Yes
fdopendir() POSIX 1003.1 libc No No Yes Yes
feclearexcept() C99, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
fedisableexcept() BSD, QNX Neutrino libm, libm-sve No Yes Yes Yes
feenableexcept() BSD, QNX Neutrino libm, libm-sve No Yes Yes Yes
fegetenv() C99, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
fegetexceptflag() C99, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
fegetprec() QNX Neutrino libm, libm-sve No Yes Yes Yes
fegetround() C99, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
feholdexcept() C99, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
feof() ANSI, POSIX 1003.1 libc No No No Yes
feraiseexcept() C99, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
ferror() ANSI, POSIX 1003.1 libc No No No Yes
fesetenv() C99, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
fesetexceptflag() C99, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
fesetprec() QNX Neutrino libm, libm-sve No Yes Yes Yes
fesetround() C99, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
fetestexcept() C99, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
feupdateenv() C99, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
fflush() ANSI, POSIX 1003.1 libc Yes No No Yes
ffs() POSIX 1003.1 XSI libc No No Yes Yes
ffsl()   libc No No Yes Yes
ffsll() Unix libc No No Yes Yes
fgetc() ANSI, POSIX 1003.1 libc Yes No No Yes
fgetpos() ANSI, POSIX 1003.1 libc Yes No No Yes
fgets() ANSI, POSIX 1003.1 libc Yes No No Yes
fgetspent() Unix libc Yes No No No
fgetwc() ANSI, POSIX 1003.1 libc Yes No No Yes
fgetws() ANSI, POSIX 1003.1 libc Yes No No Yes
fileno() POSIX 1003.1 libc No No Yes Yes
flink() Unix libc No No Yes Yes
flock() Unix libc No No Yes Yes
flockfile() POSIX 1003.1 libc No No No Yes
floor() C11, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
floorf() C11, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
floorl() C11, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
fls() Unix libc No No Yes Yes
flsl() Unix libc No No Yes Yes
flsll() Unix libc No No Yes Yes
fma() C11, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
fmaf() C11, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
fmal() C11, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
fmax() C11, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
fmaxf() C11, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
fmaxl() C11, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
fmin() C11, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
fminf() C11, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
fminl() C11, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
fmod() C11, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
fmodf() C11, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
fmodl() C11, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
fnmatch() POSIX 1003.1 libc No No Yes Yes
_fnmatchv() QNX Neutrino libc No No Yes Yes
fopen() ANSI, POSIX 1003.1 libc Yes No No Yes
fopen64() Large-file support libc Yes No No Yes
fork() POSIX 1003.1 libc No No Yes Read the Caveats
forkpty() Unix libc Yes No Yes Yes
forksafe_mutex_destroy() QNX Neutrino libc, libforksafe_mutex No No Yes Yes
forksafe_mutex_init() QNX Neutrino libc, libforksafe_mutex No No Yes Yes
forksafe_mutex_lock() QNX Neutrino libc, libforksafe_mutex No No No Yes
forksafe_mutex_trylock() QNX Neutrino libc, libforksafe_mutex No No Yes Yes
forksafe_mutex_unlock() QNX Neutrino libc, libforksafe_mutex No No No Yes
fpathconf() POSIX 1003.1 libc No No Yes Yes
fpclassify() C11, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
fprintf() ANSI, POSIX 1003.1 libc Yes No No Yes
fputc() ANSI, POSIX 1003.1 libc Yes No No Yes
fputs() ANSI, POSIX 1003.1 libc Yes No No Yes
fputwc() ANSI, POSIX 1003.1 libc Yes No No Yes
fputws() ANSI, POSIX 1003.1 libc Yes No No Yes
fread() ANSI, POSIX 1003.1 libc Yes No No Yes
free() ANSI, POSIX 1003.1 libc No No No Yes
freeaddrinfo() POSIX 1003.1 libsocket No No No Yes
freeifaddrs() Unix libsocket No No No Yes
freopen() ANSI, POSIX 1003.1 libc Yes No No Yes
freopen64() Large-file support libc Yes No No Yes
frexp() C11, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
frexpf() C11, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
frexpl() C11, POSIX 1003.1 libm, libm-sve No Yes Yes Yes
fs_crypto_check() QNX Neutrino libfscrypto Yes No No Yes
fs_crypto_domain_add() QNX Neutrino libfscrypto Yes No No Yes
fs_crypto_domain_add_flags() QNX Neutrino libfscrypto Yes No No Yes
fs_crypto_domain_hard_lock() QNX Neutrino libfscrypto Yes No No Yes
fs_crypto_domain_key_change() QNX Neutrino libfscrypto Yes No No Yes
fs_crypto_domain_key_check() QNX Neutrino libfscrypto Yes No No Yes
fs_crypto_domain_key_size() QNX Neutrino libfscrypto No No No Yes
fs_crypto_domain_lock() QNX Neutrino libfscrypto Yes No No Yes
fs_crypto_domain_query() QNX Neutrino libfscrypto Yes No No Yes
fs_crypto_domain_remove() QNX Neutrino libfscrypto Yes No No Yes
fs_crypto_domain_unlock() QNX Neutrino libfscrypto Yes No No Yes
fs_crypto_domain_whitelist_configure() QNX Neutrino libfscrypto Yes No No Yes
fs_crypto_domain_whitelist_ctrl() QNX Neutrino libfscrypto Yes No No Yes
fs_crypto_domain_whitelist_ctrl_access_grant() QNX Neutrino libfscrypto Yes No No Yes
fs_crypto_domain_whitelist_ctrl_access_revoke() QNX Neutrino libfscrypto Yes No No Yes
fs_crypto_domain_whitelist_get_flags() QNX Neutrino libfscrypto Yes No No Yes
fs_crypto_domain_whitelist_set_flags() QNX Neutrino libfscrypto Yes No No Yes
fs_crypto_enable() QNX Neutrino libfscrypto Yes No No Yes
fs_crypto_enable_option() QNX Neutrino libfscrypto Yes No No Yes
fs_crypto_file_get_domain() QNX Neutrino libfscrypto Yes No No Yes
fs_crypto_file_set_domain() QNX Neutrino libfscrypto Yes No No Yes
fs_crypto_key_gen() QNX Neutrino libfscrypto Yes No No Yes
fs_crypto_migrate_control() QNX Neutrino libfscrypto Yes No No Yes
fs_crypto_migrate_path() QNX Neutrino libfscrypto Yes No No Yes
fs_crypto_migrate_status() QNX Neutrino libfscrypto Yes No No Yes
fs_crypto_migrate_tag() QNX Neutrino libfscrypto Yes No No Yes
fs_crypto_set_logging() QNX Neutrino libfscrypto Yes No No Yes
fscanf() ANSI, POSIX 1003.1 libc Yes No No Yes
fseek() ANSI, POSIX 1003.1 libc Yes No Yes Yes
fseeko() POSIX 1003.1 libc Yes No Yes Yes
fseeko64() Large-file support libc Yes No Yes Yes
fsetpos() ANSI, POSIX 1003.1 libc Yes No Yes Yes
fstat() POSIX 1003.1 libc No No Yes Yes
fstat64() Large-file support libc No No Yes Yes
fstatat() POSIX 1003.1 libc No No Yes Yes
fstatat64() Large-file support libc No No Yes Yes
fstatvfs() POSIX 1003.1 libc No No Yes Yes
fstatvfs64() Large-file support libc No No Yes Yes
fsync() POSIX 1003.1 FSC libc Yes No Yes Yes
ftell() ANSI, POSIX 1003.1 libc Yes No No Yes
ftello() POSIX 1003.1 libc Yes No No Yes
ftello64() Large-file support libc Yes No No Yes
ftime() Standard Unix; removed from POSIX.1-2008 libc No No Yes Yes
ftruncate() POSIX 1003.1 libc No No Yes Yes
ftruncate64() Large-file support libc No No Yes Yes
ftrylockfile() POSIX 1003.1 libc No No Yes Yes
ftw() POSIX 1003.1 OB XSI libc Yes No Yes Yes
ftw64() Large-file support libc Yes No Yes Yes
funlockfile() POSIX 1003.1 libc No No No Yes
futime() Unix libc No No Yes Yes
futimens() POSIX 1003.1 libc No No Yes Yes
fwide() ANSI, POSIX 1003.1 libc No No Yes Yes
fwprintf() ANSI, POSIX 1003.1 libc Yes No No Yes
fwrite() ANSI, POSIX 1003.1 libc Yes No No Yes
fwscanf() ANSI, POSIX 1003.1 libc Yes No No Yes