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 28static 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 <errno.h> 38#include <sys/types.h> 39#include <sys/stat.h> 40#include <sys/param.h> 41#include <sys/wait.h> 42 43#include "pwupd.h" 44 45#define HAVE_PWDB_C 1 46#define HAVE_PWDB_U 1 47 48static char pathpwd[] = _PATH_PWD; 49static char * pwpath = pathpwd; 50 51int 52setpwdir(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 63char * 64getpwpath(char const * file) 65{ 66 static char pathbuf[MAXPATHLEN]; 67 68 snprintf(pathbuf, sizeof pathbuf, "%s/%s", pwpath, file); 69 return pathbuf; 70} 71 72int 73pwdb(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 106int 107fmtpwentry(char *buf, struct passwd * pwd, int type) 108{ 109 int l; 110 char *pw; 111 112 pw = (type == PWF_MASTER) ? 113 ((pwd->pw_passwd == NULL) ? "" : pwd->pw_passwd) : "*"; 114 115 if (type == PWF_PASSWD) 116 l = sprintf(buf, "%s:*:%ld:%ld:%s:%s:%s\n", 117 pwd->pw_name, (long) pwd->pw_uid, (long) pwd->pw_gid, 118 pwd->pw_gecos ? pwd->pw_gecos : "User &", 119 pwd->pw_dir, pwd->pw_shell); 120 else 121 l = sprintf(buf, "%s:%s:%ld:%ld:%s:%lu:%lu:%s:%s:%s\n", 122 pwd->pw_name, pw, (long) pwd->pw_uid, (long) pwd->pw_gid, 123 pwd->pw_class ? pwd->pw_class : "", 124 (unsigned long) pwd->pw_change, 125 (unsigned long) pwd->pw_expire, 126 pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell); 127 return l; 128} 129 130 131int 132fmtpwent(char *buf, struct passwd * pwd) 133{ 134 return fmtpwentry(buf, pwd, PWF_STANDARD); 135} 136 137static int 138pw_update(struct passwd * pwd, char const * user, int mode) 139{ 140 int rc = 0; 141 142 ENDPWENT(); 143 144 /* 145 * First, let's check the see if the database is alright 146 * Note: -C is only available in FreeBSD 2.2 and above 147 */ 148#ifdef HAVE_PWDB_C 149 rc = pwdb("-C", (char *)NULL); /* Check only */ 150 if (rc == 0) { 151#else 152 { /* No -C */ 153#endif 154 char pfx[PWBUFSZ]; 155 char pwbuf[PWBUFSZ]; 156 int l = snprintf(pfx, PWBUFSZ, "%s:", user); 157#ifdef HAVE_PWDB_U 158 int isrename = pwd!=NULL && strcmp(user, pwd->pw_name); 159#endif 160 161 /* 162 * Update the passwd file first 163 */ 164 if (pwd == NULL) 165 *pwbuf = '\0'; 166 else 167 fmtpwentry(pwbuf, pwd, PWF_PASSWD); 168 169 if (l < 0) 170 l = 0; 171 rc = fileupdate(getpwpath(_PASSWD), 0644, pwbuf, pfx, l, mode); 172 if (rc == 0) { 173 174 /* 175 * Then the master.passwd file 176 */ 177 if (pwd != NULL) 178 fmtpwentry(pwbuf, pwd, PWF_MASTER); 179 rc = fileupdate(getpwpath(_MASTERPASSWD), 0600, pwbuf, pfx, l, mode); 180 if (rc == 0) { 181#ifdef HAVE_PWDB_U 182 if (mode == UPD_DELETE || isrename) 183#endif 184 rc = pwdb(NULL); 185#ifdef HAVE_PWDB_U 186 else 187 rc = pwdb("-u", user, (char *)NULL); 188#endif 189 } 190 } 191 } 192 return rc; 193} 194 195int 196addpwent(struct passwd * pwd) 197{ 198 return pw_update(pwd, pwd->pw_name, UPD_CREATE); 199} 200 201int 202chgpwent(char const * login, struct passwd * pwd) 203{ 204 return pw_update(pwd, login, UPD_REPLACE); 205} 206 207int 208delpwent(struct passwd * pwd) 209{ 210 return pw_update(NULL, pwd->pw_name, UPD_DELETE); 211} 212