only (function removed in POSIX.1-2008)] getc_unlocked() getchar_unlocked() getdate() getenv() getgrent() getgrgid() getgrnam() gethostbyaddr ... fwprintf() fwrite() fwscanf() geta…getpwuid_r () flockfile () ftrylockfile () funlockfile () getc_unlocked () getchar_unlocked () putc_unlocked () putchar_unlocked () rand