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 * $FreeBSD: src/usr.sbin/pw/pwupd.c,v 1.12.2.4 2001/12/21 15:21:32 nectar Exp $ 27 * $DragonFly: src/usr.sbin/pw/pwupd.c,v 1.2 2003/06/17 04:30:02 dillon Exp $ 28 */ 29 30 #include <stdio.h> 31 #include <stdlib.h> 32 #include <string.h> 33 #include <unistd.h> 34 #include <stdarg.h> 35 #include <errno.h> 36 #include <sys/types.h> 37 #include <sys/stat.h> 38 #include <sys/param.h> 39 #include <sys/wait.h> 40 41 #include "pwupd.h" 42 43 #define HAVE_PWDB_C 1 44 #define HAVE_PWDB_U 1 45 46 static char pathpwd[] = _PATH_PWD; 47 static char * pwpath = pathpwd; 48 49 int 50 setpwdir(const char * dir) 51 { 52 if (dir == NULL) 53 return -1; 54 else { 55 char * d = malloc(strlen(dir)+1); 56 if (d == NULL) 57 return -1; 58 pwpath = strcpy(d, dir); 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 return pathbuf; 70 } 71 72 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 return i; 104 } 105 106 int 107 fmtpwentry(char *buf, struct passwd * pwd, int type) 108 { 109 int l; 110 char *pw; 111 112 pw = (pwd->pw_passwd == NULL || !*pwd->pw_passwd) ? "" : (type == PWF_MASTER) ? pwd->pw_passwd : "*"; 113 114 if (type == PWF_PASSWD) 115 l = sprintf(buf, "%s:*:%ld:%ld:%s:%s:%s\n", 116 pwd->pw_name, (long) pwd->pw_uid, (long) pwd->pw_gid, 117 pwd->pw_gecos ? pwd->pw_gecos : "User &", 118 pwd->pw_dir, pwd->pw_shell); 119 else 120 l = sprintf(buf, "%s:%s:%ld:%ld:%s:%lu:%lu:%s:%s:%s\n", 121 pwd->pw_name, pw, (long) pwd->pw_uid, (long) pwd->pw_gid, 122 pwd->pw_class ? pwd->pw_class : "", 123 (unsigned long) pwd->pw_change, 124 (unsigned long) pwd->pw_expire, 125 pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell); 126 return l; 127 } 128 129 130 int 131 fmtpwent(char *buf, struct passwd * pwd) 132 { 133 return fmtpwentry(buf, pwd, PWF_STANDARD); 134 } 135 136 static int 137 pw_update(struct passwd * pwd, char const * user, int mode) 138 { 139 int rc = 0; 140 141 ENDPWENT(); 142 143 /* 144 * First, let's check the see if the database is alright 145 * Note: -C is only available in FreeBSD 2.2 and above 146 */ 147 #ifdef HAVE_PWDB_C 148 if (pwdb("-C", NULL) == 0) { /* Check only */ 149 #else 150 { /* No -C */ 151 #endif 152 char pfx[PWBUFSZ]; 153 char pwbuf[PWBUFSZ]; 154 int l = snprintf(pfx, PWBUFSZ, "%s:", user); 155 #ifdef HAVE_PWDB_U 156 int isrename = pwd!=NULL && strcmp(user, pwd->pw_name); 157 #endif 158 159 /* 160 * Update the passwd file first 161 */ 162 if (pwd == NULL) 163 *pwbuf = '\0'; 164 else 165 fmtpwentry(pwbuf, pwd, PWF_PASSWD); 166 167 rc = fileupdate(getpwpath(_PASSWD), 0644, pwbuf, pfx, l, mode); 168 if (rc == 0) { 169 170 /* 171 * Then the master.passwd file 172 */ 173 if (pwd != NULL) 174 fmtpwentry(pwbuf, pwd, PWF_MASTER); 175 rc = fileupdate(getpwpath(_MASTERPASSWD), 0600, pwbuf, pfx, l, mode); 176 if (rc == 0) { 177 #ifdef HAVE_PWDB_U 178 if (mode == UPD_DELETE || isrename) 179 #endif 180 rc = pwdb(NULL); 181 #ifdef HAVE_PWDB_U 182 else 183 rc = pwdb("-u", user, NULL); 184 #endif 185 } 186 } 187 } 188 return rc; 189 } 190 191 int 192 addpwent(struct passwd * pwd) 193 { 194 return pw_update(pwd, pwd->pw_name, UPD_CREATE); 195 } 196 197 int 198 chgpwent(char const * login, struct passwd * pwd) 199 { 200 return pw_update(pwd, login, UPD_REPLACE); 201 } 202 203 int 204 delpwent(struct passwd * pwd) 205 { 206 return pw_update(NULL, pwd->pw_name, UPD_DELETE); 207 } 208