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: pwupd.c,v 1.1.1.3 1996/12/10 23:59:02 joerg Exp $ 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 #include <stdarg.h> 39 40 #include "pwupd.h" 41 42 #define HAVE_PWDB_C 1 43 44 static int 45 pwdb(char *arg,...) 46 { 47 int i = 0; 48 pid_t pid; 49 va_list ap; 50 char *args[8]; 51 52 args[i++] = _PATH_PWD_MKDB; 53 va_start(ap, arg); 54 while (i < 6 && arg != NULL) { 55 args[i++] = arg; 56 arg = va_arg(ap, char *); 57 } 58 args[i++] = _PATH_MASTERPASSWD; 59 args[i] = NULL; 60 61 if ((pid = fork()) == -1) /* Error (errno set) */ 62 i = -1; 63 else if (pid == 0) { /* Child */ 64 execv(args[0], args); 65 _exit(1); 66 } else { /* Parent */ 67 waitpid(pid, &i, 0); 68 if ((i = WEXITSTATUS(i)) != 0) 69 errno = EIO; /* set SOMETHING */ 70 } 71 return i; 72 } 73 74 int 75 fmtpwentry(char *buf, struct passwd * pwd, int type) 76 { 77 int l; 78 char *pw; 79 80 pw = (pwd->pw_passwd == NULL || !*pwd->pw_passwd) ? "" : (type == PWF_MASTER) ? pwd->pw_passwd : "*"; 81 82 if (type == PWF_PASSWD) 83 l = sprintf(buf, "%s:*:%ld:%ld:%s:%s:%s\n", 84 pwd->pw_name, (long) pwd->pw_uid, (long) pwd->pw_gid, 85 pwd->pw_gecos ? pwd->pw_gecos : "User &", 86 pwd->pw_dir, pwd->pw_shell); 87 else 88 l = sprintf(buf, "%s:%s:%ld:%ld:%s:%lu:%lu:%s:%s:%s\n", 89 pwd->pw_name, pw, (long) pwd->pw_uid, (long) pwd->pw_gid, 90 pwd->pw_class ? pwd->pw_class : "", 91 (unsigned long) pwd->pw_change, 92 (unsigned long) pwd->pw_expire, 93 pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell); 94 return l; 95 } 96 97 98 int 99 fmtpwent(char *buf, struct passwd * pwd) 100 { 101 return fmtpwentry(buf, pwd, PWF_STANDARD); 102 } 103 104 static int 105 pw_update(struct passwd * pwd, char const * user, int mode) 106 { 107 int rc = 0; 108 109 endpwent(); 110 111 /* 112 * First, let's check the see if the database is alright 113 * Note: -c is only available in FreeBSD 2.2 and above 114 */ 115 #ifdef HAVE_PWDB_C 116 if (pwdb("-c", NULL) == 0) { /* Check only */ 117 #else 118 { /* No -c */ 119 #endif 120 char pfx[32]; 121 char pwbuf[PWBUFSZ]; 122 int l = sprintf(pfx, "%s:", user); 123 124 /* 125 * Update the passwd file first 126 */ 127 if (pwd == NULL) 128 *pwbuf = '\0'; 129 else 130 fmtpwentry(pwbuf, pwd, PWF_PASSWD); 131 if ((rc = fileupdate(_PATH_PASSWD, 0644, pwbuf, pfx, l, mode)) != 0) { 132 133 /* 134 * Then the master.passwd file 135 */ 136 if (pwd != NULL) 137 fmtpwentry(pwbuf, pwd, PWF_MASTER); 138 if ((rc = fileupdate(_PATH_MASTERPASSWD, 0644, pwbuf, pfx, l, mode)) != 0) 139 rc = pwdb(NULL) == 0; 140 } 141 } 142 return rc; 143 } 144 145 int 146 addpwent(struct passwd * pwd) 147 { 148 return pw_update(pwd, pwd->pw_name, UPD_CREATE); 149 } 150 151 int 152 chgpwent(char const * login, struct passwd * pwd) 153 { 154 return pw_update(pwd, login, UPD_REPLACE); 155 } 156 157 int 158 delpwent(struct passwd * pwd) 159 { 160 return pw_update(NULL, pwd->pw_name, UPD_DELETE); 161 } 162