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 27 #ifndef lint 28 static const char rcsid[] = 29 "$Id: pwupd.c,v 1.6 1997/10/10 06:23:41 charnier Exp $"; 30 #endif /* not lint */ 31 32 #include <stdio.h> 33 #include <stdlib.h> 34 #include <string.h> 35 #include <unistd.h> 36 #include <stdarg.h> 37 #include <errno.h> 38 #include <sys/types.h> 39 #include <sys/stat.h> 40 #include <sys/wait.h> 41 42 #include "pwupd.h" 43 44 #define HAVE_PWDB_C 1 45 46 static int 47 pwdb(char *arg,...) 48 { 49 int i = 0; 50 pid_t pid; 51 va_list ap; 52 char *args[8]; 53 54 args[i++] = _PATH_PWD_MKDB; 55 va_start(ap, arg); 56 while (i < 6 && arg != NULL) { 57 args[i++] = arg; 58 arg = va_arg(ap, char *); 59 } 60 args[i++] = _PATH_MASTERPASSWD; 61 args[i] = NULL; 62 63 if ((pid = fork()) == -1) /* Error (errno set) */ 64 i = -1; 65 else if (pid == 0) { /* Child */ 66 execv(args[0], args); 67 _exit(1); 68 } else { /* Parent */ 69 waitpid(pid, &i, 0); 70 if ((i = WEXITSTATUS(i)) != 0) 71 errno = EIO; /* set SOMETHING */ 72 } 73 return i; 74 } 75 76 int 77 fmtpwentry(char *buf, struct passwd * pwd, int type) 78 { 79 int l; 80 char *pw; 81 82 pw = (pwd->pw_passwd == NULL || !*pwd->pw_passwd) ? "" : (type == PWF_MASTER) ? pwd->pw_passwd : "*"; 83 84 if (type == PWF_PASSWD) 85 l = sprintf(buf, "%s:*:%ld:%ld:%s:%s:%s\n", 86 pwd->pw_name, (long) pwd->pw_uid, (long) pwd->pw_gid, 87 pwd->pw_gecos ? pwd->pw_gecos : "User &", 88 pwd->pw_dir, pwd->pw_shell); 89 else 90 l = sprintf(buf, "%s:%s:%ld:%ld:%s:%lu:%lu:%s:%s:%s\n", 91 pwd->pw_name, pw, (long) pwd->pw_uid, (long) pwd->pw_gid, 92 pwd->pw_class ? pwd->pw_class : "", 93 (unsigned long) pwd->pw_change, 94 (unsigned long) pwd->pw_expire, 95 pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell); 96 return l; 97 } 98 99 100 int 101 fmtpwent(char *buf, struct passwd * pwd) 102 { 103 return fmtpwentry(buf, pwd, PWF_STANDARD); 104 } 105 106 static int 107 pw_update(struct passwd * pwd, char const * user, int mode) 108 { 109 int rc = 0; 110 111 endpwent(); 112 113 /* 114 * First, let's check the see if the database is alright 115 * Note: -C is only available in FreeBSD 2.2 and above 116 */ 117 #ifdef HAVE_PWDB_C 118 if (pwdb("-C", NULL) == 0) { /* Check only */ 119 #else 120 { /* No -C */ 121 #endif 122 char pfx[32]; 123 char pwbuf[PWBUFSZ]; 124 int l = sprintf(pfx, "%s:", user); 125 126 /* 127 * Update the passwd file first 128 */ 129 if (pwd == NULL) 130 *pwbuf = '\0'; 131 else 132 fmtpwentry(pwbuf, pwd, PWF_PASSWD); 133 if ((rc = fileupdate(_PATH_PASSWD, 0644, pwbuf, pfx, l, mode)) != 0) { 134 135 /* 136 * Then the master.passwd file 137 */ 138 if (pwd != NULL) 139 fmtpwentry(pwbuf, pwd, PWF_MASTER); 140 if ((rc = fileupdate(_PATH_MASTERPASSWD, 0644, pwbuf, pfx, l, mode)) != 0) 141 rc = pwdb(NULL) == 0; 142 } 143 } 144 return rc; 145 } 146 147 int 148 addpwent(struct passwd * pwd) 149 { 150 return pw_update(pwd, pwd->pw_name, UPD_CREATE); 151 } 152 153 int 154 chgpwent(char const * login, struct passwd * pwd) 155 { 156 return pw_update(pwd, login, UPD_REPLACE); 157 } 158 159 int 160 delpwent(struct passwd * pwd) 161 { 162 return pw_update(NULL, pwd->pw_name, UPD_DELETE); 163 } 164