GETGID(2) | System Calls Manual | GETGID(2) |
getgid
, getegid
—
#include <unistd.h>
gid_t
getgid
(void);
gid_t
getegid
(void);
getgid
() function 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-group-id of the calling process.
getgid
() and getegid
()
functions are always successful, and no return value is reserved to indicate
an error.
getgid
() and getegid
() conform
to IEEE Std 1003.1-1990 (“POSIX.1”).
getgid
() function appeared in
Version 4 AT&T UNIX.
April 3, 2010 | NetBSD 9.2 |