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GETGID(2) | System Calls Manual | GETGID(2) |
NAME¶
getgid
,
getegid
—
get group process identification
LIBRARY¶
Standard C Library (libc, -lc)SYNOPSIS¶
#include
<sys/types.h>
#include
<unistd.h>
gid_t
getgid
(void);
gid_t
getegid
(void);
DESCRIPTION¶
Thegetgid
() system call returns the real
group ID of the calling process, getegid
()
returns the effective group ID of the calling process.
The real group ID is specified at login time.
The real group ID is the group of the user who invoked the program. As the
effective group ID gives the process additional permissions during the
execution of “set-group-ID” mode
processes, getgid
() is used to determine
the real-user-id of the calling process.
ERRORS¶
Thegetgid
() and
getegid
() system calls are always
successful, and no return value is reserved to indicate an error.
SEE ALSO¶
getuid(2), issetugid(2), setgid(2), setregid(2)STANDARDS¶
Thegetgid
() and
getegid
() system calls are expected to
conform to IEEE Std 1003.1-1990
(“POSIX.1”).June 4, 1993 | Debian |