setgid.c

来自「Axis 221 camera embedded programing inte」· C语言 代码 · 共 24 行

/* vi: set sw=4 ts=4: */
/*
 * setgid() for uClibc
 *
 * Copyright (C) 2000-2004 by Erik Andersen <[e-mail]>
 *
 * GNU Library General Public License (LGPL) version 2 or later.
 */

#include "syscalls.h"
#include <unistd.h>

#define __NR___syscall_setgid __NR_setgid
static inline _syscall1(int, __syscall_setgid, __kernel_gid_t, gid);

int setgid(gid_t gid)
{
	if (gid == (gid_t) ~ 0 || gid != (gid_t) ((__kernel_gid_t) gid)) {
		__set_errno(EINVAL);
		return -1;
	}
	return (__syscall_setgid(gid));
}