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Function	Classification	Library	Cancel	ISR	Signal	Thread
raise()	ANSI, POSIX 1003.1	libc	No	No	Yes	Yes
rand()	ANSI, POSIX 1003.1	libc	No	No	Yes	No
rand_r()	POSIX 1003.1 OB	libc	No	No	Yes	Yes
random()	POSIX 1003.1	libc	No	No	Yes	No
rdchk()	Unix	libc	No	No	Yes	Yes
re_comp()	Legacy Unix	libregex	No	No	Yes	Yes
re_exec()	Legacy Unix	libregex	No	No	Yes	Yes
read()	POSIX 1003.1 XSI	libc	Yes	No	Yes	Yes
readblock()	QNX Neutrino	libc	Yes	No	Yes	Yes
readcond()	QNX Neutrino	libc	Yes	No	Yes	Yes
readdir()	POSIX 1003.1	libc	Yes	No	No	Read the Caveats
readdir64()	Large-file support	libc	Yes	No	No	Read the Caveats
_readdir_r()	QNX Neutrino	libc	Yes	No	No	Yes
_readdir64_r()	Large-file support	libc	Yes	No	No	Yes
readdir_r()	POSIX 1003.1	libc	Yes	No	No	Yes
readdir64_r()	Large-file support	libc	Yes	No	No	Yes
readlink()	POSIX 1003.1	libc	No	No	Yes	Yes
readlinkat()	POSIX 2008	libc	No	No	Yes	Yes
readv()	POSIX 1003.1 XSI	libc	Yes	No	Yes	Yes
realloc()	ANSI, POSIX 1003.1	libc	No	No	No	Yes
realpath()	POSIX 1003.1	libc	No	No	Yes	Yes
recv()	POSIX 1003.1	libsocket	Yes	No	Yes	Yes
recvfrom()	POSIX 1003.1	libsocket	Yes	No	Yes	Yes
recvmmsg()	Unix	libsocket	Yes	No	No	Yes
recvmsg()	POSIX 1003.1	libsocket	Yes	No	No	Yes
regcomp()	POSIX 1003.1	libregex	No	No	No	Yes
regerror()	POSIX 1003.1	libregex	No	No	Yes	Yes
regexec()	POSIX 1003.1	libregex	No	No	No	Yes
regfree()	POSIX 1003.1	libregex	No	No	No	Yes
_register_ioctl_handler()	QNX Neutrino	libc	Yes	Yes	Yes	Yes
remainder()	C11, POSIX 1003.1	libm, libm-sve	No	Yes	Yes	Yes
remainderf()	C11, POSIX 1003.1	libm, libm-sve	No	Yes	Yes	Yes
remainderl()	C11, POSIX 1003.1	libm, libm-sve	No	Yes	Yes	Yes
remove()	ANSI, POSIX 1003.1	libc	Yes	No	No	Yes
remque()	POSIX 1003.1	libc	No	Yes	Yes	Yes
remquo()	C11, POSIX 1003.1	libm, libm-sve	No	Yes	Yes	Yes
remquof()	C11, POSIX 1003.1	libm, libm-sve	No	Yes	Yes	Yes
remquol()	C11, POSIX 1003.1	libm, libm-sve	No	Yes	Yes	Yes
rename()	ANSI, POSIX 1003.1	libc	Yes	No	Yes	Yes
renameat()	ANSI, POSIX 1003.1	libc	Yes	No	Yes	Yes
res_init()	Unix	libsocket	Yes	No	No	No
res_mkquery()	Unix	libsocket	Yes	No	No	No
res_query()	Unix	libsocket	Yes	No	No	No
res_querydomain()	Unix	libsocket	Yes	No	No	No
res_search()	Unix	libsocket	Yes	No	No	No
res_send()	Unix	libsocket	Yes	No	No	No
resmgr_attach()	QNX Neutrino	libc	Yes	No	No	Yes
resmgr_block()	QNX Neutrino	libc	Yes	No	No	Yes
resmgr_context_alloc()	QNX Neutrino	libc	Yes	No	No	Yes
resmgr_context_free()	QNX Neutrino	libc	Yes	No	No	Yes
resmgr_detach()	QNX Neutrino	libc	Yes	No	No	Yes
resmgr_detach_ctp()	QNX Neutrino	libc	Yes	No	No	Yes
resmgr_devino()	QNX Neutrino	libc	Yes	No	No	Yes
resmgr_handle_grow()	QNX Neutrino	libc	No	No	No	Yes
resmgr_handle_tune()	QNX Neutrino	libc	No	No	No	Yes
resmgr_handler()	QNX Neutrino	libc	Yes	No	No	Yes
resmgr_iofuncs()	QNX Neutrino	libc	No	No	No	Yes
resmgr_msg_again()	QNX Neutrino	libc	No	No	No	Yes
resmgr_msgget()	QNX Neutrino	libc	No	No	Yes	Yes
resmgr_msggetsize()	QNX Neutrino	libc	No	Yes	Yes	Yes
resmgr_msggetv()	QNX Neutrino	libc	No	No	Yes	Yes
resmgr_msgread()	QNX Neutrino	libc	No	No	Yes	Yes
resmgr_msgreadv()	QNX Neutrino	libc	No	No	Yes	Yes
resmgr_msgreply()	QNX Neutrino	libc	No	No	Yes	Yes
resmgr_msgreplyv()	QNX Neutrino	libc	No	No	Yes	Yes
resmgr_msgwrite()	QNX Neutrino	libc	No	No	Yes	Yes
resmgr_msgwritev()	QNX Neutrino	libc	No	No	Yes	Yes
_RESMGR_NPARTS()	QNX Neutrino		No	Yes	Yes	Yes
resmgr_ocb()	QNX Neutrino	libc	No	No	No	Yes
resmgr_ocb_iofuncs()	QNX Neutrino	libc	No	No	No	Yes
resmgr_open_bind()	QNX Neutrino	libc	No	No	No	Yes
resmgr_pathname()	QNX Neutrino	libc	No	No	Yes	Yes
_RESMGR_PTR()	QNX Neutrino		No	Yes	Yes	Yes
_RESMGR_STATUS()	QNX Neutrino		No	Yes	Yes	Yes
resmgr_unbind()	QNX Neutrino	libc	No	No	No	Yes
rewind()	ANSI, POSIX 1003.1	libc	Yes	No	No	Yes
rewinddir()	POSIX 1003.1	libc	Yes	No	Yes	Yes
rindex()	Standard Unix; removed from POSIX.1-2008	libc	No	Yes	Yes	Yes
rint()	C11, POSIX 1003.1	libm, libm-sve	No	Yes	Yes	Yes
rintf()	C11, POSIX 1003.1	libm, libm-sve	No	Yes	Yes	Yes
rintl()	C11, POSIX 1003.1	libm, libm-sve	No	Yes	Yes	Yes
rmdir()	POSIX 1003.1	libc	No	No	Yes	Yes
round()	C11, POSIX 1003.1	libm, libm-sve	No	Yes	Yes	Yes
roundf()	C11, POSIX 1003.1	libm, libm-sve	No	Yes	Yes	Yes
roundl()	C11, POSIX 1003.1	libm, libm-sve	No	Yes	Yes	Yes
rsrcdbmgr_attach()	QNX Neutrino	libc	Yes	No	Yes	Yes
rsrcdbmgr_create()	QNX Neutrino	libc	Yes	No	Yes	Yes
rsrcdbmgr_destroy()	QNX Neutrino	libc	Yes	No	Yes	Yes
rsrcdbmgr_detach()	QNX Neutrino	libc	Yes	No	Yes	Yes
rsrcdbmgr_devno_attach()	QNX Neutrino	libc	Yes	No	Yes	Yes
rsrcdbmgr_devno_detach()	QNX Neutrino	libc	Yes	No	Yes	Yes
rsrcdbmgr_query_name()	QNX Neutrino	libc	Yes	No	Yes	Yes