1 /* 2 * Copyright (c) 1983 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #if defined(LIBC_SCCS) && !defined(lint) 35 /*static char *sccsid = "from: @(#)setruid.c 5.5 (Berkeley) 2/23/91";*/ 36 static char *rcsid = "$Id: setruid.c,v 1.4 1994/04/24 01:00:42 mycroft Exp $"; 37 #endif /* LIBC_SCCS and not lint */ 38 39 #include <stdio.h> 40 #include <unistd.h> 41 #include <sys/uio.h> 42 43 int 44 #ifdef __STDC__ 45 setruid(uid_t ruid) 46 #else 47 setruid(ruid) 48 int ruid; 49 #endif 50 { 51 static int warned; 52 static char w[] = 53 ": warning: this program uses setruid(), which is deprecated.\r\n"; 54 55 if (!warned) { 56 struct iovec iov[2]; 57 extern char *__progname; /* in crt0 */ 58 59 iov[0].iov_base = __progname; 60 iov[0].iov_len = strlen(__progname); 61 iov[1].iov_base = w; 62 iov[1].iov_len = strlen(w); 63 (void) writev(STDERR_FILENO, iov, 2); 64 warned = 1; 65 } 66 67 return (__setreuid(ruid, -1)); 68 } 69