id_t(3type) — Linux manual page
id_t(3type) id_t(3type)
NAME
pid_t, uid_t, gid_t, id_t - process/user/group identifier
LIBRARY
Standard C library (libc)
SYNOPSIS
#include <sys/types.h>
typedef /* ... */ pid_t;
typedef /* ... */ uid_t;
typedef /* ... */ gid_t;
typedef /* ... */ id_t;
DESCRIPTION
pid_t is a type used for storing process IDs, process group IDs,
and session IDs. It is a signed integer type.
uid_t is a type used to hold user IDs. It is an integer type.
gid_t is a type used to hold group IDs. It is an integer type.
id_t is a type used to hold a general identifier. It is an
integer type that can be used to contain a pid_t, uid_t, or
gid_t.
STANDARDS
POSIX.1-2008.
HISTORY
POSIX.1-2001.
NOTES
The following headers also provide pid_t: <fcntl.h>, <sched.h>,
<signal.h>, <spawn.h>, <sys/msg.h>, <sys/sem.h>, <sys/shm.h>,
<sys/wait.h>, <termios.h>, <time.h>, <unistd.h>, and <utmpx.h>.
The following headers also provide uid_t: <pwd.h>, <signal.h>,
<stropts.h>, <sys/ipc.h>, <sys/stat.h>, and <unistd.h>.
The following headers also provide gid_t: <grp.h>, <pwd.h>,
<signal.h>, <stropts.h>, <sys/ipc.h>, <sys/stat.h>, and
<unistd.h>.
The following header also provides id_t: <sys/resource.h>.
SEE ALSO
chown(2), fork(2), getegid(2), geteuid(2), getgid(2),
getgroups(2), getpgid(2), getpid(2), getppid(2), getpriority(2),
getpwnam(3), getresgid(2), getresuid(2), getsid(2), gettid(2),
getuid(2), kill(2), pidfd_open(2), sched_setscheduler(2),
waitid(2), getgrnam(3), sigqueue(3), credentials(7)
COLOPHON
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
the project can be found at
⟨https://www.kernel.org/doc/man-pages/⟩. If you have a bug report
for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
This page was obtained from the tarball man-pages-6.9.1.tar.gz
fetched from
⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
2024-06-26. If you discover any rendering problems in this HTML
version of the page, or you believe there is a better or more up-
to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not
part of the original manual page), send a mail to
man-pages@man7.org