uid_t
(3type)process/user/group identifier
LIBRARY
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
HISTORY
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>.