addmntent chown endgrent endmntent endpwent fchown fgetgrent fork getegid geteuid getgid getgrent getgrgid getgrnam getgroups getlogin getmntent getpgrp getpid getppid getpwent getpwnam getpwuid getrlimit getrusage getuid hasmntopt isatty lchown mkfifo mknod pclose pipe popen select setgid setgrent setmntent setpgid setpwent setrlimit setsid setuid sync ttyname uname vfork