NAME

setgid — set-group-ID

SYNOPSIS

#include <sys/types.h>
#include <unistd.h>

int setgid(gid_t gid);

DESCRIPTION

If the process has appropriate privileges, setgid() sets the real group ID, effective group ID and the saved set-group-ID to gid .

If the process does not have appropriate privileges, but gid is equal to the real group ID or the saved set-group-ID, setgid () function sets the effective group ID to gid; the real group ID and saved set-group-ID remain unchanged.

Any supplementary group IDs of the calling process remain unchanged.

RETURN VALUE

Upon successful completion, 0 is returned. Otherwise, -1 is returned and errno is set to indicate the error.

ERRORS

The setgid() function will fail if:

[EINVAL]

The value of the gid argument is invalid and is not supported by the implementation.

[EPERM]

The process does not have appropriate privileges and gid does not match the real group ID or the saved set-group-ID.

EXAMPLES

None.

APPLICATION USAGE

None.

FUTURE DIRECTIONS

None.

SEE ALSO

exec(3) , getgid(3) , setuid(3) , <sys/types.h> , <unistd.h> .

DERIVATION

Derived from Issue 1 of the SVID.