1/* 2 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_LICENSE_HEADER_START@ 5 * 6 * "Portions Copyright (c) 1999 Apple Computer, Inc. All Rights 7 * Reserved. This file contains Original Code and/or Modifications of 8 * Original Code as defined in and that are subject to the Apple Public 9 * Source License Version 1.0 (the 'License'). You may not use this file 10 * except in compliance with the License. Please obtain a copy of the 11 * License at http://www.apple.com/publicsource and read it before using 12 * this file. 13 * 14 * The Original Code and all software distributed under the License are 15 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 16 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 17 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the 19 * License for the specific language governing rights and limitations 20 * under the License." 21 * 22 * @APPLE_LICENSE_HEADER_END@ 23 */ 24/*- 25 * Copyright (c) 1990, 1993, 1994 26 * The Regents of the University of California. All rights reserved. 27 * 28 * Redistribution and use in source and binary forms, with or without 29 * modification, are permitted provided that the following conditions 30 * are met: 31 * 1. Redistributions of source code must retain the above copyright 32 * notice, this list of conditions and the following disclaimer. 33 * 2. Redistributions in binary form must reproduce the above copyright 34 * notice, this list of conditions and the following disclaimer in the 35 * documentation and/or other materials provided with the distribution. 36 * 3. All advertising materials mentioning features or use of this software 37 * must display the following acknowledgement: 38 * This product includes software developed by the University of 39 * California, Berkeley and its contributors. 40 * 4. Neither the name of the University nor the names of its contributors 41 * may be used to endorse or promote products derived from this software 42 * without specific prior written permission. 43 * 44 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 45 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 46 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 47 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 48 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 49 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 50 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 51 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 52 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 53 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 54 * SUCH DAMAGE. 55 */ 56 57#ifndef lint 58#include <sys/cdefs.h> 59__unused static char sccsid[] = "@(#)pw_util.c 8.4 (Berkeley) 4/28/95"; 60#endif /* not lint */ 61 62/* 63 * This file is used by all the "password" programs; vipw(8), chpass(1), 64 * and passwd(1). 65 */ 66 67#include <sys/param.h> 68#include <sys/time.h> 69#include <sys/resource.h> 70#include <sys/stat.h> 71#include <sys/wait.h> 72 73#include <err.h> 74#include <errno.h> 75#include <fcntl.h> 76#include <paths.h> 77#include <pwd.h> 78#include <signal.h> 79#include <stdio.h> 80#include <stdlib.h> 81#include <string.h> 82#include <unistd.h> 83 84#include "pw_util.h" 85 86extern char *tempname; 87static pid_t editpid = -1; 88static int lockfd; 89 90void 91pw_cont(sig) 92 int sig; 93{ 94 95 if (editpid != -1) 96 kill(editpid, sig); 97} 98 99void 100pw_init() 101{ 102 struct rlimit rlim; 103 104 /* Unlimited resource limits. */ 105 rlim.rlim_cur = rlim.rlim_max = RLIM_INFINITY; 106 (void)setrlimit(RLIMIT_CPU, &rlim); 107 (void)setrlimit(RLIMIT_FSIZE, &rlim); 108 (void)setrlimit(RLIMIT_STACK, &rlim); 109 (void)setrlimit(RLIMIT_DATA, &rlim); 110 (void)setrlimit(RLIMIT_RSS, &rlim); 111 112 /* Don't drop core (not really necessary, but GP's). */ 113 rlim.rlim_cur = rlim.rlim_max = 0; 114 (void)setrlimit(RLIMIT_CORE, &rlim); 115 116 /* Turn off signals. */ 117 (void)signal(SIGALRM, SIG_IGN); 118 (void)signal(SIGHUP, SIG_IGN); 119 (void)signal(SIGINT, SIG_IGN); 120 (void)signal(SIGPIPE, SIG_IGN); 121 (void)signal(SIGQUIT, SIG_IGN); 122 (void)signal(SIGTERM, SIG_IGN); 123 (void)signal(SIGCONT, pw_cont); 124 125 /* Create with exact permissions. */ 126 (void)umask(0); 127} 128 129int 130pw_lock() 131{ 132 /* 133 * If the master password file doesn't exist, the system is hosed. 134 * Might as well try to build one. Set the close-on-exec bit so 135 * that users can't get at the encrypted passwords while editing. 136 * Open should allow flock'ing the file; see 4.4BSD. XXX 137 */ 138 lockfd = open(_PATH_MASTERPASSWD, O_RDONLY, 0); 139 if (lockfd < 0 || fcntl(lockfd, F_SETFD, 1) == -1) 140 err(1, "%s", _PATH_MASTERPASSWD); 141 if (flock(lockfd, LOCK_EX|LOCK_NB)) 142 errx(1, "the password db file is busy"); 143 return (lockfd); 144} 145 146int 147pw_tmp() 148{ 149 static char path[MAXPATHLEN] = _PATH_MASTERPASSWD; 150 int fd; 151 char *p; 152 153 if (p = strrchr(path, '/')) 154 ++p; 155 else 156 p = path; 157 strcpy(p, "pw.XXXXXX"); 158 if ((fd = mkstemp(path)) == -1) 159 err(1, "%s", path); 160 tempname = path; 161 return (fd); 162} 163 164int 165pw_mkdb() 166{ 167 int pstat; 168 pid_t pid; 169 170 warnx("rebuilding the database..."); 171 (void)fflush(stderr); 172 if (!(pid = vfork())) { 173 execl(_PATH_PWD_MKDB, "pwd_mkdb", "-p", tempname, NULL); 174 pw_error(_PATH_PWD_MKDB, 1, 1); 175 } 176 pid = waitpid(pid, &pstat, 0); 177 if (pid == -1 || !WIFEXITED(pstat) || WEXITSTATUS(pstat) != 0) 178 return (1); 179 warnx("done"); 180 return (0); 181} 182 183void 184pw_edit(notsetuid) 185 int notsetuid; 186{ 187 int pstat; 188 char *p, *editor; 189 190 if (!(editor = getenv("EDITOR"))) 191 editor = _PATH_VI; 192 if (p = strrchr(editor, '/')) 193 ++p; 194 else 195 p = editor; 196 197 if (!(editpid = vfork())) { 198 if (notsetuid) { 199 (void)setgid(getgid()); 200 (void)setuid(getuid()); 201 } 202 execlp(editor, p, tempname, NULL); 203 _exit(1); 204 } 205 for (;;) { 206 editpid = waitpid(editpid, (int *)&pstat, WUNTRACED); 207 if (editpid == -1) 208 pw_error(editor, 1, 1); 209 else if (WIFSTOPPED(pstat)) 210 raise(WSTOPSIG(pstat)); 211 else if (WIFEXITED(pstat) && WEXITSTATUS(pstat) == 0) 212 break; 213 else 214 pw_error(editor, 1, 1); 215 } 216 editpid = -1; 217} 218 219void 220pw_prompt() 221{ 222 int c; 223 224 (void)printf("re-edit the password file? [y]: "); 225 (void)fflush(stdout); 226 c = getchar(); 227 if (c != EOF && c != '\n') 228 while (getchar() != '\n'); 229 if (c == 'n') 230 pw_error(NULL, 0, 0); 231} 232 233void 234pw_error(name, err, eval) 235 char *name; 236 int err, eval; 237{ 238 if (err) 239 warn("%s", name); 240 241 warnx("%s: unchanged", _PATH_MASTERPASSWD); 242 (void)unlink(tempname); 243 exit(eval); 244} 245