SETREGID(2) | System Calls Manual | SETREGID(2) |
setregid
—
#include <unistd.h>
int
setregid
(gid_t
rgid, gid_t
egid);
The real and effective group ID's of the current process are set according to the arguments. If the real group ID is changed, the saved group ID is changed to the new value of the effective group ID.
If rgid or egid is -1, the current gid is filled in by the system. Unprivileged users may change the real group ID to the effective group ID, and may change the effective group ID to the real group ID or the saved group ID; only the super-user may make other changes.
The setregid
() function has been used to
swap the real and effective group IDs in set-group-ID programs to
temporarily relinquish the set-group-ID value. This purpose is now better
served by the use of the setegid
() function (see
setgid(2)).
When setting the real and effective group IDs to the same value,
this function is equivalent to the setgid
()
function. When setting only the effective group ID, this function is
equivalent to the setegid
() function.
EPERM
]setregid
() function call appeared in
4.2BSD. An incompatible version was implemented in
4.4BSD. It was reimplemented in
NetBSD 1.2 in a way compatible with
4.3BSD, SunOS and Linux, but should not be used in new
code.
January 5, 2001 | NetBSD 9.2 |