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 static char pathpwd[] = _PATH_PWD; 49 static char * pwpath = pathpwd; 50 51 int 52 setpwdir(const char * dir) 53 { 54 if (dir == NULL) 55 return -1; 56 else 57 pwpath = strdup(dir); 58 if (pwpath == NULL) 59 return -1; 60 return 0; 61 } 62 63 char * 64 getpwpath(char const * file) 65 { 66 static char pathbuf[MAXPATHLEN]; 67 68 snprintf(pathbuf, sizeof pathbuf, "%s/%s", pwpath, file); 69 return pathbuf; 70 } 71 72 static int 73 pwdb(char *arg,...) 74 { 75 int i = 0; 76 pid_t pid; 77 va_list ap; 78 char *args[10]; 79 80 args[i++] = _PATH_PWD_MKDB; 81 va_start(ap, arg); 82 while (i < 6 && arg != NULL) { 83 args[i++] = arg; 84 arg = va_arg(ap, char *); 85 } 86 if (pwpath != pathpwd) { 87 args[i++] = "-d"; 88 args[i++] = pwpath; 89 } 90 args[i++] = getpwpath(_MASTERPASSWD); 91 args[i] = NULL; 92 93 if ((pid = fork()) == -1) /* Error (errno set) */ 94 i = errno; 95 else if (pid == 0) { /* Child */ 96 execv(args[0], args); 97 _exit(1); 98 } else { /* Parent */ 99 waitpid(pid, &i, 0); 100 if (WEXITSTATUS(i)) 101 i = EIO; 102 } 103 va_end(ap); 104 return i; 105 } 106 107 static int 108 pw_update(struct passwd * pwd, char const * user) 109 { 110 int rc = 0; 111 112 rc = pwdb("-C", (char *)NULL); /* Check only */ 113 if (rc == 0) { 114 int pfd, tfd; 115 struct passwd *pw = NULL; 116 struct passwd *old_pw = NULL; 117 118 if (pwd != NULL) 119 pw = pw_dup(pwd); 120 121 if (user != NULL) 122 old_pw = GETPWNAM(user); 123 124 if (pw_init(pwpath, NULL)) 125 err(1, "pw_init()"); 126 if ((pfd = pw_lock()) == -1) { 127 pw_fini(); 128 err(1, "pw_lock()"); 129 } 130 if ((tfd = pw_tmp(-1)) == -1) { 131 pw_fini(); 132 err(1, "pw_tmp()"); 133 } 134 if (pw_copy(pfd, tfd, pw, old_pw) == -1) { 135 pw_fini(); 136 err(1, "pw_copy()"); 137 } 138 /* 139 * in case of deletion of a user, the whole database 140 * needs to be regenerated 141 */ 142 if (pw_mkdb(pw != NULL ? pw->pw_name : NULL) == -1) { 143 pw_fini(); 144 err(1, "pw_mkdb()"); 145 } 146 free(pw); 147 pw_fini(); 148 } 149 return 0; 150 } 151 152 int 153 addpwent(struct passwd * pwd) 154 { 155 return pw_update(pwd, NULL); 156 } 157 158 int 159 chgpwent(char const * login, struct passwd * pwd) 160 { 161 return pw_update(pwd, login); 162 } 163 164 int 165 delpwent(struct passwd * pwd) 166 { 167 char login[MAXLOGNAME]; 168 169 strlcpy(login, pwd->pw_name, MAXLOGNAME); 170 return pw_update(NULL, login); 171 } 172