freebsd-dev/usr.sbin/pw/pwupd.c
Baptiste Daroussin 0083d61abc In case of the deletion of a user those whole database has to be regenerated,
otherwise the user planned to be deleted remain in the pwd.db while removed from
the plain text password file.
2012-12-26 18:28:17 +00:00

183 lines
4.0 KiB
C

/*-
* Copyright (C) 1996
* David L. Nugent. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stdarg.h>
#include <pwd.h>
#include <libutil.h>
#include <errno.h>
#include <err.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <sys/wait.h>
#include "pwupd.h"
#define HAVE_PWDB_C 1
#define HAVE_PWDB_U 1
static char pathpwd[] = _PATH_PWD;
static char * pwpath = pathpwd;
int
setpwdir(const char * dir)
{
if (dir == NULL)
return -1;
else
pwpath = strdup(dir);
if (pwpath == NULL)
return -1;
return 0;
}
char *
getpwpath(char const * file)
{
static char pathbuf[MAXPATHLEN];
snprintf(pathbuf, sizeof pathbuf, "%s/%s", pwpath, file);
return pathbuf;
}
static int
pwdb(char *arg,...)
{
int i = 0;
pid_t pid;
va_list ap;
char *args[10];
args[i++] = _PATH_PWD_MKDB;
va_start(ap, arg);
while (i < 6 && arg != NULL) {
args[i++] = arg;
arg = va_arg(ap, char *);
}
if (pwpath != pathpwd) {
args[i++] = "-d";
args[i++] = pwpath;
}
args[i++] = getpwpath(_MASTERPASSWD);
args[i] = NULL;
if ((pid = fork()) == -1) /* Error (errno set) */
i = errno;
else if (pid == 0) { /* Child */
execv(args[0], args);
_exit(1);
} else { /* Parent */
waitpid(pid, &i, 0);
if (WEXITSTATUS(i))
i = EIO;
}
va_end(ap);
return i;
}
static int
pw_update(struct passwd * pwd, char const * user)
{
int rc = 0;
/*
* First, let's check the see if the database is alright
* Note: -C is only available in FreeBSD 2.2 and above
*/
#ifdef HAVE_PWDB_C
rc = pwdb("-C", (char *)NULL); /* Check only */
if (rc == 0) {
#else
{ /* No -C */
#endif
int pfd, tfd;
struct passwd *pw = NULL;
struct passwd *old_pw = NULL;
if (pwd != NULL)
pw = pw_dup(pwd);
if (user != NULL)
old_pw = GETPWNAM(user);
if (pw_init(pwpath, NULL))
err(1, "pw_init()");
if ((pfd = pw_lock()) == -1) {
pw_fini();
err(1, "pw_lock()");
}
if ((tfd = pw_tmp(-1)) == -1) {
pw_fini();
err(1, "pw_tmp()");
}
if (pw_copy(pfd, tfd, pw, old_pw) == -1) {
pw_fini();
err(1, "pw_copy()");
}
/*
* in case of deletion of a user, the whole database
* needs to be regenerated
*/
if (pw_mkdb(pw != NULL ? user : NULL) == -1) {
pw_fini();
err(1, "pw_mkdb()");
}
free(pw);
pw_fini();
}
return 0;
}
int
addpwent(struct passwd * pwd)
{
return pw_update(pwd, NULL);
}
int
chgpwent(char const * login, struct passwd * pwd)
{
return pw_update(pwd, login);
}
int
delpwent(struct passwd * pwd)
{
char login[MAXLOGNAME];
strlcpy(login, pwd->pw_name, MAXLOGNAME);
return pw_update(NULL, login);
}