<unistd.h>
¶acct
brk
chroot
closefrom
close_range
copy_file_range
daemon
eaccess
endusershell
euidaccess
execveat
execvpe
get_current_dir_name
getdomainname
getdtablesize
getpagesize
getpass
gettid
getusershell
group_member
profil
revoke
sbrk
setlogin
setdomainname
sethostid
sethostname
setusershell
syncfs
syscall
ttyslot
vhangup