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 <pwd.h> 37 #include <libutil.h> 38 #include <errno.h> 39 #include <err.h> 40 #include <sys/types.h> 41 #include <sys/stat.h> 42 #include <sys/param.h> 43 #include <sys/wait.h> 44 45 #include "pwupd.h" 46 47 static char pathpwd[] = _PATH_PWD; 48 static char * pwpath = pathpwd; 49 50 int 51 setpwdir(const char * dir) 52 { 53 if (dir == NULL) 54 return (-1); 55 else 56 pwpath = strdup(dir); 57 if (pwpath == NULL) 58 return (-1); 59 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 70 return (pathbuf); 71 } 72 73 static int 74 pwdb_check(void) 75 { 76 int i = 0; 77 pid_t pid; 78 char *args[10]; 79 80 args[i++] = _PATH_PWD_MKDB; 81 args[i++] = "-C"; 82 83 if (pwpath != pathpwd) { 84 args[i++] = "-d"; 85 args[i++] = pwpath; 86 } 87 args[i++] = getpwpath(_MASTERPASSWD); 88 args[i] = NULL; 89 90 if ((pid = fork()) == -1) /* Error (errno set) */ 91 i = errno; 92 else if (pid == 0) { /* Child */ 93 execv(args[0], args); 94 _exit(1); 95 } else { /* Parent */ 96 waitpid(pid, &i, 0); 97 if (WEXITSTATUS(i)) 98 i = EIO; 99 } 100 101 return (i); 102 } 103 104 static int 105 pw_update(struct passwd * pwd, char const * user) 106 { 107 struct passwd *pw = NULL; 108 struct passwd *old_pw = NULL; 109 int rc, pfd, tfd; 110 111 if ((rc = pwdb_check()) != 0) 112 return (rc); 113 114 if (pwd != NULL) 115 pw = pw_dup(pwd); 116 117 if (user != NULL) 118 old_pw = GETPWNAM(user); 119 120 if (pw_init(pwpath, NULL)) 121 err(1, "pw_init()"); 122 if ((pfd = pw_lock()) == -1) { 123 pw_fini(); 124 err(1, "pw_lock()"); 125 } 126 if ((tfd = pw_tmp(-1)) == -1) { 127 pw_fini(); 128 err(1, "pw_tmp()"); 129 } 130 if (pw_copy(pfd, tfd, pw, old_pw) == -1) { 131 pw_fini(); 132 err(1, "pw_copy()"); 133 } 134 /* 135 * in case of deletion of a user, the whole database 136 * needs to be regenerated 137 */ 138 if (pw_mkdb(pw != NULL ? pw->pw_name : NULL) == -1) { 139 pw_fini(); 140 err(1, "pw_mkdb()"); 141 } 142 free(pw); 143 pw_fini(); 144 145 return (0); 146 } 147 148 int 149 addpwent(struct passwd * pwd) 150 { 151 152 return (pw_update(pwd, NULL)); 153 } 154 155 int 156 chgpwent(char const * login, struct passwd * pwd) 157 { 158 159 return (pw_update(pwd, login)); 160 } 161 162 int 163 delpwent(struct passwd * pwd) 164 { 165 char login[MAXLOGNAME]; 166 167 strlcpy(login, pwd->pw_name, MAXLOGNAME); 168 169 return (pw_update(NULL, login)); 170 } 171