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setgid32
Langue: en
Version: 2009-10-17 (ubuntu - 24/10/10)
Section: 2 (Appels système)
NAME
setgid - set group identitySYNOPSIS
#include <sys/types.h>#include <unistd.h>
int setgid(gid_t gid);
DESCRIPTION
setgid() sets the effective group ID of the calling process. If the caller is the superuser, the real GID and saved set-group-ID are also set.Under Linux, setgid() is implemented like the POSIX version with the _POSIX_SAVED_IDS feature. This allows a set-group-ID program that is not set-user-ID-root to drop all of its group privileges, do some un-privileged work, and then reengage the original effective group ID in a secure manner.
RETURN VALUE
On success, zero is returned. On error, -1 is returned, and errno is set appropriately.ERRORS
- EPERM
- The calling process is not privileged (does not have the CAP_SETGID capability), and gid does not match the real group ID or saved set-group-ID of the calling process.
CONFORMING TO
SVr4, POSIX.1-2001.SEE ALSO
getgid(2), setegid(2), setregid(2), capabilities(7), credentials(7)COLOPHON
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