1id_t(3type)                                                        id_t(3type)
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NAME

6       pid_t, uid_t, gid_t, id_t - process/user/group identifier
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LIBRARY

9       Standard C library (libc)
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SYNOPSIS

12       #include <sys/types.h>
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14       typedef /* ... */ pid_t;
15       typedef /* ... */ uid_t;
16       typedef /* ... */ gid_t;
17       typedef /* ... */ id_t;
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DESCRIPTION

20       pid_t  is  a  type used for storing process IDs, process group IDs, and
21       session IDs.  It is a signed integer type.
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23       uid_t is a type used to hold user IDs.  It is an integer type.
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25       gid_t is a type used to hold group IDs.  It is an integer type.
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27       id_t is a type used to hold a general identifier.   It  is  an  integer
28       type that can be used to contain a pid_t, uid_t, or gid_t.
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STANDARDS

31       POSIX.1-2008.
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HISTORY

34       POSIX.1-2001.
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NOTES

37       The  following  headers also provide pid_t: <fcntl.h>, <sched.h>, <sig‐
38       nal.h>, <spawn.h>, <sys/msg.h>, <sys/sem.h>, <sys/shm.h>, <sys/wait.h>,
39       <termios.h>, <time.h>, <unistd.h>, and <utmpx.h>.
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41       The   following   headers  also  provide  uid_t:  <pwd.h>,  <signal.h>,
42       <stropts.h>, <sys/ipc.h>, <sys/stat.h>, and <unistd.h>.
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44       The following headers also provide gid_t: <grp.h>, <pwd.h>, <signal.h>,
45       <stropts.h>, <sys/ipc.h>, <sys/stat.h>, and <unistd.h>.
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47       The following header also provides id_t: <sys/resource.h>.
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SEE ALSO

50       chown(2),  fork(2),  getegid(2),  geteuid(2),  getgid(2), getgroups(2),
51       getpgid(2), getpid(2), getppid(2), getpriority(2), getpwnam(3), getres‐
52       gid(2),   getresuid(2),   getsid(2),   gettid(2),  getuid(2),  kill(2),
53       pidfd_open(2),    sched_setscheduler(2),    waitid(2),     getgrnam(3),
54       sigqueue(3), credentials(7)
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58Linux man-pages 6.04              2023-03-30                       id_t(3type)