1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (C) 1996 5 * David L. Nugent. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #ifndef lint 30 static const char rcsid[] = 31 "$FreeBSD$"; 32 #endif /* not lint */ 33 34 #include <sys/wait.h> 35 36 #include <err.h> 37 #include <errno.h> 38 #include <pwd.h> 39 #include <libutil.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <unistd.h> 44 45 #include "pwupd.h" 46 47 char * 48 getpwpath(char const * file) 49 { 50 static char pathbuf[MAXPATHLEN]; 51 52 snprintf(pathbuf, sizeof pathbuf, "%s/%s", conf.etcpath, file); 53 54 return (pathbuf); 55 } 56 57 static int 58 pwdb_check(void) 59 { 60 int i = 0; 61 pid_t pid; 62 char *args[10]; 63 64 args[i++] = _PATH_PWD_MKDB; 65 args[i++] = "-C"; 66 67 if (strcmp(conf.etcpath, _PATH_PWD) != 0) { 68 args[i++] = "-d"; 69 args[i++] = conf.etcpath; 70 } 71 args[i++] = getpwpath(_MASTERPASSWD); 72 args[i] = NULL; 73 74 if ((pid = fork()) == -1) /* Error (errno set) */ 75 i = errno; 76 else if (pid == 0) { /* Child */ 77 execv(args[0], args); 78 _exit(1); 79 } else { /* Parent */ 80 waitpid(pid, &i, 0); 81 if (WEXITSTATUS(i)) 82 i = EIO; 83 } 84 85 return (i); 86 } 87 88 static int 89 pw_update(struct passwd * pwd, char const * user) 90 { 91 struct passwd *pw = NULL; 92 struct passwd *old_pw = NULL; 93 int rc, pfd, tfd; 94 95 if ((rc = pwdb_check()) != 0) 96 return (rc); 97 98 if (pwd != NULL) 99 pw = pw_dup(pwd); 100 101 if (user != NULL) 102 old_pw = GETPWNAM(user); 103 104 if (pw_init(conf.etcpath, NULL)) 105 err(1, "pw_init()"); 106 if ((pfd = pw_lock()) == -1) { 107 pw_fini(); 108 err(1, "pw_lock()"); 109 } 110 if ((tfd = pw_tmp(-1)) == -1) { 111 pw_fini(); 112 err(1, "pw_tmp()"); 113 } 114 if (pw_copy(pfd, tfd, pw, old_pw) == -1) { 115 pw_fini(); 116 close(tfd); 117 err(1, "pw_copy()"); 118 } 119 fsync(tfd); 120 close(tfd); 121 /* 122 * in case of deletion of a user, the whole database 123 * needs to be regenerated 124 */ 125 if (pw_mkdb(pw != NULL ? pw->pw_name : NULL) == -1) { 126 pw_fini(); 127 err(1, "pw_mkdb()"); 128 } 129 free(pw); 130 pw_fini(); 131 132 return (0); 133 } 134 135 int 136 addpwent(struct passwd * pwd) 137 { 138 139 return (pw_update(pwd, NULL)); 140 } 141 142 int 143 chgpwent(char const * login, struct passwd * pwd) 144 { 145 146 return (pw_update(pwd, login)); 147 } 148 149 int 150 delpwent(struct passwd * pwd) 151 { 152 153 return (pw_update(NULL, pwd->pw_name)); 154 } 155