1 /*- 2 * Copyright (C) 1996 3 * David L. Nugent. 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 * 14 * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $Id$ 27 */ 28 29 #include <stdio.h> 30 #include <stdlib.h> 31 #include <string.h> 32 #include <unistd.h> 33 #include <stdarg.h> 34 #include <errno.h> 35 #include <sys/types.h> 36 #include <sys/stat.h> 37 #include <sys/wait.h> 38 39 #include "pwupd.h" 40 41 #define HAVE_PWDB_C 1 42 43 static int 44 pwdb(char *arg,...) 45 { 46 int i = 0; 47 pid_t pid; 48 va_list ap; 49 char *args[8]; 50 51 args[i++] = _PATH_PWD_MKDB; 52 va_start(ap, arg); 53 while (i < 6 && arg != NULL) { 54 args[i++] = arg; 55 arg = va_arg(ap, char *); 56 } 57 args[i++] = _PATH_MASTERPASSWD; 58 args[i] = NULL; 59 60 if ((pid = fork()) == -1) /* Error (errno set) */ 61 i = -1; 62 else if (pid == 0) { /* Child */ 63 execv(args[0], args); 64 _exit(1); 65 } else { /* Parent */ 66 waitpid(pid, &i, 0); 67 if ((i = WEXITSTATUS(i)) != 0) 68 errno = EIO; /* set SOMETHING */ 69 } 70 return i; 71 } 72 73 int 74 fmtpwentry(char *buf, struct passwd * pwd, int type) 75 { 76 int l; 77 char *pw; 78 79 pw = (pwd->pw_passwd == NULL || !*pwd->pw_passwd) ? "" : (type == PWF_MASTER) ? pwd->pw_passwd : "*"; 80 81 if (type == PWF_PASSWD) 82 l = sprintf(buf, "%s:*:%ld:%ld:%s:%s:%s\n", 83 pwd->pw_name, (long) pwd->pw_uid, (long) pwd->pw_gid, 84 pwd->pw_gecos ? pwd->pw_gecos : "User &", 85 pwd->pw_dir, pwd->pw_shell); 86 else 87 l = sprintf(buf, "%s:%s:%ld:%ld:%s:%lu:%lu:%s:%s:%s\n", 88 pwd->pw_name, pw, (long) pwd->pw_uid, (long) pwd->pw_gid, 89 pwd->pw_class ? pwd->pw_class : "", 90 (unsigned long) pwd->pw_change, 91 (unsigned long) pwd->pw_expire, 92 pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell); 93 return l; 94 } 95 96 97 int 98 fmtpwent(char *buf, struct passwd * pwd) 99 { 100 return fmtpwentry(buf, pwd, PWF_STANDARD); 101 } 102 103 static int 104 pw_update(struct passwd * pwd, char const * user, int mode) 105 { 106 int rc = 0; 107 108 endpwent(); 109 110 /* 111 * First, let's check the see if the database is alright 112 * Note: -c is only available in FreeBSD 2.2 and above 113 */ 114 #ifdef HAVE_PWDB_C 115 if (pwdb("-c", NULL) == 0) { /* Check only */ 116 #else 117 { /* No -c */ 118 #endif 119 char pfx[32]; 120 char pwbuf[PWBUFSZ]; 121 int l = sprintf(pfx, "%s:", user); 122 123 /* 124 * Update the passwd file first 125 */ 126 if (pwd == NULL) 127 *pwbuf = '\0'; 128 else 129 fmtpwentry(pwbuf, pwd, PWF_PASSWD); 130 if ((rc = fileupdate(_PATH_PASSWD, 0644, pwbuf, pfx, l, mode)) != 0) { 131 132 /* 133 * Then the master.passwd file 134 */ 135 if (pwd != NULL) 136 fmtpwentry(pwbuf, pwd, PWF_MASTER); 137 if ((rc = fileupdate(_PATH_MASTERPASSWD, 0644, pwbuf, pfx, l, mode)) != 0) 138 rc = pwdb(NULL) == 0; 139 } 140 } 141 return rc; 142 } 143 144 int 145 addpwent(struct passwd * pwd) 146 { 147 return pw_update(pwd, pwd->pw_name, UPD_CREATE); 148 } 149 150 int 151 chgpwent(char const * login, struct passwd * pwd) 152 { 153 return pw_update(pwd, login, UPD_REPLACE); 154 } 155 156 int 157 delpwent(struct passwd * pwd) 158 { 159 return pw_update(NULL, pwd->pw_name, UPD_DELETE); 160 } 161