1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 * $FreeBSD$ 21 */ 22 23 /* 24 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 25 * Use is subject to license terms. 26 */ 27 28 #pragma ident "@(#)chg_usr_exec.c 1.3 07/05/25 SMI" 29 30 #include <stdio.h> 31 #include <stdlib.h> 32 #include <unistd.h> 33 #include <string.h> 34 #include <errno.h> 35 #include <pwd.h> 36 37 int 38 main(int argc, char *argv[]) 39 { 40 char *plogin = NULL; 41 char cmds[BUFSIZ] = { 0 }; 42 char sep[] = " "; 43 struct passwd *ppw = NULL; 44 int i, len; 45 46 if (argc < 3 || strlen(argv[1]) == 0) { 47 (void) printf("\tUsage: %s <login> <commands> ...\n", argv[0]); 48 return (1); 49 } 50 51 plogin = argv[1]; 52 len = 0; 53 for (i = 2; i < argc; i++) { 54 (void) snprintf(cmds+len, sizeof (cmds)-len, 55 "%s%s", argv[i], sep); 56 len += strlen(argv[i]) + strlen(sep); 57 } 58 59 if ((ppw = getpwnam(plogin)) == NULL) { 60 perror("getpwnam"); 61 return (errno); 62 } 63 if (setgid(ppw->pw_gid) != 0) { 64 perror("setgid"); 65 return (errno); 66 } 67 if (setuid(ppw->pw_uid) != 0) { 68 perror("setuid"); 69 return (errno); 70 } 71 72 if (execl("/bin/sh", "sh", "-c", cmds, (char *)0) != 0) { 73 perror("execl"); 74 return (errno); 75 } 76 77 return (0); 78 } 79