<unistd.h>
¶_exit
_Fork
access
alarm
chdir
chown
close
confstr
crypt
dup
dup2
dup3
encrypt
environ
execl
execle
execlp
execv
execve
execvp
faccessat
fchdir
fchown
fchownat
fdatasync
fexecve
fork
fpathconf
fsync
ftruncate
getcwd
getegid
getentropy
geteuid
getgid
getgroups
gethostid
gethostname
getlogin
getlogin_r
getopt
getpgid
getpgrp
getpid
getppid
getresgid
getresuid
getsid
getuid
isatty
lchown
link
linkat
lockf
lseek
nice
optarg
opterr
optind
optopt
pathconf
pause
pipe
pipe2
posix_close
pread
pwrite
read
readlink
readlinkat
rmdir
setegid
seteuid
setgid
setpgid
setregid
setresgid
setresuid
setreuid
setsid
setuid
sleep
swab
symlink
symlinkat
sync
sysconf
tcgetpgrp
tcsetpgrp
truncate
ttyname
ttyname_r
unlink
unlinkat
write