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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 #include "mail.h" 31 32 int 33 dowait(pid_t pidval) 34 { 35 pid_t w; 36 int status; 37 void (*istat)(), (*qstat)(); 38 39 /* 40 Parent temporarily ignores signals so it will remain 41 around for command to finish 42 */ 43 istat = signal(SIGINT, SIG_IGN); 44 qstat = signal(SIGQUIT, SIG_IGN); 45 46 while ((w = wait(&status)) != pidval && w != CERROR); 47 if (w == CERROR) { 48 status = -errno; 49 signal(SIGINT, istat); 50 signal(SIGQUIT, qstat); 51 return (status); 52 } 53 54 signal(SIGINT, istat); 55 signal(SIGQUIT, qstat); 56 status = ((status>>8)&0xFF); /* extract 8 high order bits */ 57 return (status); 58 } 59 60 /* 61 invoke shell to execute command waiting for command to terminate 62 s -> command string 63 return: 64 status -> command exit status 65 */ 66 int 67 systm(char *s) 68 { 69 pid_t pid; 70 71 /* 72 Spawn the shell to execute command, however, since the 73 mail command runs setgid mode reset the effective group 74 id to the real group id so that the command does not 75 acquire any special privileges 76 */ 77 if ((pid = fork()) == CHILD) { 78 setuid(my_uid); 79 setgid(my_gid); 80 #ifdef SVR3 81 execl("/bin/sh", "sh", "-c", s, (char*)NULL); 82 #else 83 execl("/usr/bin/sh", "sh", "-c", s, (char*)NULL); 84 #endif 85 exit(127); 86 } 87 return (dowait(pid)); 88 } 89