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 */ 21 22 /* 23 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "@(#)chg_usr_exec.c 1.3 07/05/25 SMI" 28 29 #include <stdio.h> 30 #include <stdlib.h> 31 #include <unistd.h> 32 #include <string.h> 33 #include <errno.h> 34 #include <pwd.h> 35 36 int 37 main(int argc, char *argv[]) 38 { 39 char *plogin = NULL; 40 char cmds[BUFSIZ] = { 0 }; 41 char sep[] = " "; 42 struct passwd *ppw = NULL; 43 int i, len; 44 45 if (argc < 3 || strlen(argv[1]) == 0) { 46 (void) printf("\tUsage: %s <login> <commands> ...\n", argv[0]); 47 return (1); 48 } 49 50 plogin = argv[1]; 51 len = 0; 52 for (i = 2; i < argc; i++) { 53 (void) snprintf(cmds+len, sizeof (cmds)-len, 54 "%s%s", argv[i], sep); 55 len += strlen(argv[i]) + strlen(sep); 56 } 57 58 if ((ppw = getpwnam(plogin)) == NULL) { 59 perror("getpwnam"); 60 return (errno); 61 } 62 if (setgid(ppw->pw_gid) != 0) { 63 perror("setgid"); 64 return (errno); 65 } 66 if (setuid(ppw->pw_uid) != 0) { 67 perror("setuid"); 68 return (errno); 69 } 70 71 if (execl("/bin/sh", "sh", "-c", cmds, (char *)0) != 0) { 72 perror("execl"); 73 return (errno); 74 } 75 76 return (0); 77 } 78