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 <sys/wait.h> 33 34 #include <err.h> 35 #include <errno.h> 36 #include <pwd.h> 37 #include <libutil.h> 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <unistd.h> 42 43 #include "pwupd.h" 44 45 char * 46 getpwpath(char const * file) 47 { 48 static char pathbuf[MAXPATHLEN]; 49 50 snprintf(pathbuf, sizeof pathbuf, "%s/%s", conf.etcpath, file); 51 52 return (pathbuf); 53 } 54 55 static int 56 pwdb_check(void) 57 { 58 int i = 0; 59 pid_t pid; 60 char *args[10]; 61 62 args[i++] = _PATH_PWD_MKDB; 63 args[i++] = "-C"; 64 65 if (strcmp(conf.etcpath, _PATH_PWD) != 0) { 66 args[i++] = "-d"; 67 args[i++] = conf.etcpath; 68 } 69 args[i++] = getpwpath(_MASTERPASSWD); 70 args[i] = NULL; 71 72 if ((pid = fork()) == -1) /* Error (errno set) */ 73 i = errno; 74 else if (pid == 0) { /* Child */ 75 execv(args[0], args); 76 _exit(1); 77 } else { /* Parent */ 78 waitpid(pid, &i, 0); 79 if (WEXITSTATUS(i)) 80 i = EIO; 81 } 82 83 return (i); 84 } 85 86 static int 87 pw_update(struct passwd * pwd, char const * user) 88 { 89 struct passwd *pw = NULL; 90 struct passwd *old_pw = NULL; 91 int rc, pfd, tfd; 92 93 if ((rc = pwdb_check()) != 0) 94 return (rc); 95 96 if (pwd != NULL) 97 pw = pw_dup(pwd); 98 99 if (user != NULL) 100 old_pw = GETPWNAM(user); 101 102 if (pw_init(conf.etcpath, NULL)) 103 err(1, "pw_init()"); 104 if ((pfd = pw_lock()) == -1) { 105 pw_fini(); 106 err(1, "pw_lock()"); 107 } 108 if ((tfd = pw_tmp(-1)) == -1) { 109 pw_fini(); 110 err(1, "pw_tmp()"); 111 } 112 if (pw_copy(pfd, tfd, pw, old_pw) == -1) { 113 pw_fini(); 114 close(tfd); 115 err(1, "pw_copy()"); 116 } 117 fsync(tfd); 118 close(tfd); 119 /* 120 * in case of deletion of a user, the whole database 121 * needs to be regenerated 122 */ 123 if (pw_mkdb(pw != NULL ? pw->pw_name : NULL) == -1) { 124 pw_fini(); 125 err(1, "pw_mkdb()"); 126 } 127 free(pw); 128 pw_fini(); 129 130 return (0); 131 } 132 133 int 134 addpwent(struct passwd * pwd) 135 { 136 137 return (pw_update(pwd, NULL)); 138 } 139 140 int 141 chgpwent(char const * login, struct passwd * pwd) 142 { 143 144 return (pw_update(pwd, login)); 145 } 146 147 int 148 delpwent(struct passwd * pwd) 149 { 150 151 return (pw_update(NULL, pwd->pw_name)); 152 } 153