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 "$FreeBSD$"; 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 <pwd.h> 38 #include <libutil.h> 39 #include <errno.h> 40 #include <err.h> 41 #include <sys/types.h> 42 #include <sys/stat.h> 43 #include <sys/param.h> 44 #include <sys/wait.h> 45 46 #include "pwupd.h" 47 48 #define HAVE_PWDB_C 1 49 #define HAVE_PWDB_U 1 50 51 static char pathpwd[] = _PATH_PWD; 52 static char * pwpath = pathpwd; 53 54 int 55 setpwdir(const char * dir) 56 { 57 if (dir == NULL) 58 return -1; 59 else 60 pwpath = strdup(dir); 61 if (pwpath == NULL) 62 return -1; 63 return 0; 64 } 65 66 char * 67 getpwpath(char const * file) 68 { 69 static char pathbuf[MAXPATHLEN]; 70 71 snprintf(pathbuf, sizeof pathbuf, "%s/%s", pwpath, file); 72 return pathbuf; 73 } 74 75 static int 76 pwdb(char *arg,...) 77 { 78 int i = 0; 79 pid_t pid; 80 va_list ap; 81 char *args[10]; 82 83 args[i++] = _PATH_PWD_MKDB; 84 va_start(ap, arg); 85 while (i < 6 && arg != NULL) { 86 args[i++] = arg; 87 arg = va_arg(ap, char *); 88 } 89 if (pwpath != pathpwd) { 90 args[i++] = "-d"; 91 args[i++] = pwpath; 92 } 93 args[i++] = getpwpath(_MASTERPASSWD); 94 args[i] = NULL; 95 96 if ((pid = fork()) == -1) /* Error (errno set) */ 97 i = errno; 98 else if (pid == 0) { /* Child */ 99 execv(args[0], args); 100 _exit(1); 101 } else { /* Parent */ 102 waitpid(pid, &i, 0); 103 if (WEXITSTATUS(i)) 104 i = EIO; 105 } 106 va_end(ap); 107 return i; 108 } 109 110 static int 111 pw_update(struct passwd * pwd, char const * user) 112 { 113 int rc = 0; 114 115 /* 116 * First, let's check the see if the database is alright 117 * Note: -C is only available in FreeBSD 2.2 and above 118 */ 119 #ifdef HAVE_PWDB_C 120 rc = pwdb("-C", (char *)NULL); /* Check only */ 121 if (rc == 0) { 122 #else 123 { /* No -C */ 124 #endif 125 int pfd, tfd; 126 struct passwd *pw = NULL; 127 struct passwd *old_pw = NULL; 128 129 if (pwd != NULL) 130 pw = pw_dup(pwd); 131 132 if (user != NULL) 133 old_pw = GETPWNAM(user); 134 135 if (pw_init(pwpath, NULL)) 136 err(1, "pw_init()"); 137 if ((pfd = pw_lock()) == -1) { 138 pw_fini(); 139 err(1, "pw_lock()"); 140 } 141 if ((tfd = pw_tmp(-1)) == -1) { 142 pw_fini(); 143 err(1, "pw_tmp()"); 144 } 145 if (pw_copy(pfd, tfd, pw, old_pw) == -1) { 146 pw_fini(); 147 err(1, "pw_copy()"); 148 } 149 /* 150 * in case of deletion of a user, the whole database 151 * needs to be regenerated 152 */ 153 if (pw_mkdb(pw != NULL ? user : NULL) == -1) { 154 pw_fini(); 155 err(1, "pw_mkdb()"); 156 } 157 free(pw); 158 pw_fini(); 159 } 160 return 0; 161 } 162 163 int 164 addpwent(struct passwd * pwd) 165 { 166 return pw_update(pwd, NULL); 167 } 168 169 int 170 chgpwent(char const * login, struct passwd * pwd) 171 { 172 return pw_update(pwd, login); 173 } 174 175 int 176 delpwent(struct passwd * pwd) 177 { 178 char login[MAXLOGNAME]; 179 180 strlcpy(login, pwd->pw_name, MAXLOGNAME); 181 return pw_update(NULL, login); 182 } 183