pwupd.c revision 20253
120253Sjoerg/*- 220253Sjoerg * Copyright (c) 1996 by David L. Nugent <davidn@blaze.net.au>. 320253Sjoerg * All rights reserved. 420253Sjoerg * 520253Sjoerg * Redistribution and use in source and binary forms, with or without 620253Sjoerg * modification, are permitted provided that the following conditions 720253Sjoerg * are met: 820253Sjoerg * 1. Redistributions of source code must retain the above copyright 920253Sjoerg * notice, this list of conditions and the following disclaimer as 1020253Sjoerg * the first lines of this file unmodified. 1120253Sjoerg * 2. Redistributions in binary form must reproduce the above copyright 1220253Sjoerg * notice, this list of conditions and the following disclaimer in the 1320253Sjoerg * documentation and/or other materials provided with the distribution. 1420253Sjoerg * 3. All advertising materials mentioning features or use of this software 1520253Sjoerg * must display the following acknowledgement: 1620253Sjoerg * This product includes software developed by David L. Nugent. 1720253Sjoerg * 4. The name of the author may not be used to endorse or promote products 1820253Sjoerg * derived from this software without specific prior written permission. 1920253Sjoerg * 2020253Sjoerg * THIS SOFTWARE IS PROVIDED BY THE DAVID L. NUGENT ``AS IS'' AND 2120253Sjoerg * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2220253Sjoerg * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2320253Sjoerg * ARE DISCLAIMED. IN NO EVENT SHALL DAVID L. NUGENT BE LIABLE 2420253Sjoerg * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2520253Sjoerg * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2620253Sjoerg * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2720253Sjoerg * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2820253Sjoerg * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2920253Sjoerg * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3020253Sjoerg * SUCH DAMAGE. 3120253Sjoerg * 3220253Sjoerg * $Id$ 3320253Sjoerg */ 3420253Sjoerg 3520253Sjoerg#include <stdio.h> 3620253Sjoerg#include <stdlib.h> 3720253Sjoerg#include <string.h> 3820253Sjoerg#include <unistd.h> 3920253Sjoerg#include <stdarg.h> 4020253Sjoerg#include <errno.h> 4120253Sjoerg#include <sys/types.h> 4220253Sjoerg#include <sys/stat.h> 4320253Sjoerg#include <sys/wait.h> 4420253Sjoerg#include <stdarg.h> 4520253Sjoerg 4620253Sjoerg#include "pwupd.h" 4720253Sjoerg 4820253Sjoergstatic int 4920253Sjoergpwdb(char *arg,...) 5020253Sjoerg{ 5120253Sjoerg int i = 0; 5220253Sjoerg pid_t pid; 5320253Sjoerg va_list ap; 5420253Sjoerg char *args[8]; 5520253Sjoerg 5620253Sjoerg args[i++] = _PATH_PWD_MKDB; 5720253Sjoerg va_start(ap, arg); 5820253Sjoerg while (i < 6 && arg != NULL) { 5920253Sjoerg args[i++] = arg; 6020253Sjoerg arg = va_arg(ap, char *); 6120253Sjoerg } 6220253Sjoerg args[i++] = _PATH_MASTERPASSWD; 6320253Sjoerg args[i] = NULL; 6420253Sjoerg 6520253Sjoerg if ((pid = fork()) == -1) /* Error (errno set) */ 6620253Sjoerg i = -1; 6720253Sjoerg else if (pid == 0) { /* Child */ 6820253Sjoerg execv(args[0], args); 6920253Sjoerg _exit(1); 7020253Sjoerg } else { /* Parent */ 7120253Sjoerg waitpid(pid, &i, 0); 7220253Sjoerg if ((i = WEXITSTATUS(i)) != 0) 7320253Sjoerg errno = EIO; /* set SOMETHING */ 7420253Sjoerg } 7520253Sjoerg return i; 7620253Sjoerg} 7720253Sjoerg 7820253Sjoergint 7920253Sjoergfmtpwentry(char *buf, struct passwd * pwd, int type) 8020253Sjoerg{ 8120253Sjoerg int l; 8220253Sjoerg char *pw; 8320253Sjoerg 8420253Sjoerg pw = (pwd->pw_passwd == NULL || !*pwd->pw_passwd) ? "" : (type == PWF_MASTER) ? pwd->pw_passwd : "*"; 8520253Sjoerg 8620253Sjoerg if (type == PWF_PASSWD) 8720253Sjoerg l = sprintf(buf, "%s:*:%ld:%ld:%s:%s:%s\n", 8820253Sjoerg pwd->pw_name, (long) pwd->pw_uid, (long) pwd->pw_gid, 8920253Sjoerg pwd->pw_gecos ? pwd->pw_gecos : "User &", 9020253Sjoerg pwd->pw_dir, pwd->pw_shell); 9120253Sjoerg else 9220253Sjoerg l = sprintf(buf, "%s:%s:%ld:%ld:%s:%lu:%lu:%s:%s:%s\n", 9320253Sjoerg pwd->pw_name, pw, (long) pwd->pw_uid, (long) pwd->pw_gid, 9420253Sjoerg pwd->pw_class ? pwd->pw_class : "", 9520253Sjoerg (unsigned long) pwd->pw_change, 9620253Sjoerg (unsigned long) pwd->pw_expire, 9720253Sjoerg pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell); 9820253Sjoerg return l; 9920253Sjoerg} 10020253Sjoerg 10120253Sjoerg 10220253Sjoergint 10320253Sjoergfmtpwent(char *buf, struct passwd * pwd) 10420253Sjoerg{ 10520253Sjoerg return fmtpwentry(buf, pwd, PWF_STANDARD); 10620253Sjoerg} 10720253Sjoerg 10820253Sjoergstatic int 10920253Sjoergpw_update(struct passwd * pwd, char const * user, int mode) 11020253Sjoerg{ 11120253Sjoerg int rc = 0; 11220253Sjoerg 11320253Sjoerg endpwent(); 11420253Sjoerg 11520253Sjoerg /* 11620253Sjoerg * First, let's check the see if the database is alright 11720253Sjoerg */ 11820253Sjoerg if (pwdb("-c", NULL) == 0) { /* Check only */ 11920253Sjoerg char pfx[32]; 12020253Sjoerg char pwbuf[MAXPWLINE]; 12120253Sjoerg int l = sprintf(pfx, "%s:", user); 12220253Sjoerg 12320253Sjoerg /* 12420253Sjoerg * Update the passwd file first 12520253Sjoerg */ 12620253Sjoerg if (pwd == NULL) 12720253Sjoerg *pwbuf = '\0'; 12820253Sjoerg else 12920253Sjoerg fmtpwentry(pwbuf, pwd, PWF_PASSWD); 13020253Sjoerg if ((rc = fileupdate(_PATH_PASSWD, 0644, pwbuf, pfx, l, mode)) != 0) { 13120253Sjoerg 13220253Sjoerg /* 13320253Sjoerg * Then the master.passwd file 13420253Sjoerg */ 13520253Sjoerg if (pwd != NULL) 13620253Sjoerg fmtpwentry(pwbuf, pwd, PWF_MASTER); 13720253Sjoerg if ((rc = fileupdate(_PATH_MASTERPASSWD, 0644, pwbuf, pfx, l, mode)) != 0) 13820253Sjoerg rc = pwdb(NULL) == 0; 13920253Sjoerg } 14020253Sjoerg } 14120253Sjoerg return rc; 14220253Sjoerg} 14320253Sjoerg 14420253Sjoergint 14520253Sjoergaddpwent(struct passwd * pwd) 14620253Sjoerg{ 14720253Sjoerg return pw_update(pwd, pwd->pw_name, UPD_CREATE); 14820253Sjoerg} 14920253Sjoerg 15020253Sjoergint 15120253Sjoergchgpwent(char const * login, struct passwd * pwd) 15220253Sjoerg{ 15320253Sjoerg return pw_update(pwd, login, UPD_REPLACE); 15420253Sjoerg} 15520253Sjoerg 15620253Sjoergint 15720253Sjoergdelpwent(struct passwd * pwd) 15820253Sjoerg{ 15920253Sjoerg return pw_update(NULL, pwd->pw_name, UPD_DELETE); 16020253Sjoerg} 161