[svn-upgrade] Integrating new upstream version, shadow (19990709)
This commit is contained in:
nekral-guest
281
src/sulogin.c
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281
src/sulogin.c
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/*
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* Copyright 1989 - 1994, Julianne Frances Haugh
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of Julianne F. Haugh nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <config.h>
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#include "rcsid.h"
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RCSID(PKG_VER "$Id: sulogin.c,v 1.9 1999/06/07 16:40:45 marekm Exp $")
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#include "prototypes.h"
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#include "defines.h"
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#include "getdef.h"
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#if HAVE_UTMPX_H
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#include <utmpx.h>
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#else
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#include <utmp.h>
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#endif
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#include <signal.h>
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#include <stdio.h>
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#include <pwd.h>
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#include <fcntl.h>
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#include "pwauth.h"
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static char name[BUFSIZ];
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static char pass[BUFSIZ];
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static struct passwd pwent;
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#if 0
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#if HAVE_UTMPX_H
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static struct utmpx utent;
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#else
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static struct utmp utent;
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#endif
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#endif
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extern char **newenvp;
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extern size_t newenvc;
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extern char **environ;
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extern char *tz P_((const char *));
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#ifndef ALARM
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#define ALARM 60
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#endif
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/* local function prototypes */
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static RETSIGTYPE catch P_((int));
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int main P_((int, char **));
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static RETSIGTYPE
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catch(int sig)
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{
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exit(1);
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}
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/* syslogd is usually not running at the time when sulogin is typically
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called, cluttering the screen with unnecessary messages. Suggested
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by Ivan Nejgebauer <ian@unsux.ns.ac.yu>. --marekm */
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#undef USE_SYSLOG
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/*ARGSUSED*/
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int
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main(int argc, char **argv)
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{
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char *cp;
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char **envp = environ;
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TERMIO termio;
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#ifdef USE_SGTTY
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ioctl (0, TIOCGETP, &termio);
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termio.sg_flags |= (ECHO|CRMOD);
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termio.sg_flags &= ~(RAW|CBREAK);
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ioctl (0, TIOCSETN, &termio);
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#endif
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#ifdef USE_TERMIO
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ioctl (0, TCGETA, &termio);
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termio.c_iflag |= (ICRNL|IXON);
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termio.c_oflag |= (OPOST|ONLCR);
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termio.c_cflag |= (CREAD);
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termio.c_lflag |= (ISIG|ICANON|ECHO|ECHOE|ECHOK);
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ioctl (0, TCSETAF, &termio);
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#endif
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#ifdef USE_TERMIOS
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tcgetattr (0, &termio);
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termio.c_iflag |= (ICRNL|IXON);
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termio.c_oflag |= (CREAD);
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termio.c_lflag |= (ECHO|ECHOE|ECHOK|ICANON|ISIG);
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tcsetattr (0, TCSANOW, &termio);
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#endif
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setlocale(LC_ALL, "");
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bindtextdomain(PACKAGE, LOCALEDIR);
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textdomain(PACKAGE);
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#ifdef USE_SYSLOG
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openlog ("sulogin", LOG_PID|LOG_CONS|LOG_NOWAIT, LOG_AUTH);
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#endif
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initenv();
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if (argc > 1) {
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close (0);
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close (1);
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close (2);
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if (open (argv[1], O_RDWR) >= 0) {
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dup (0);
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dup (0);
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} else {
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#ifdef USE_SYSLOG
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syslog (LOG_WARN, "cannot open %s\n", argv[1]);
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closelog ();
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#endif
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exit (1);
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}
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}
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if (access(PASSWD_FILE, F_OK) == -1) { /* must be a password file! */
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printf(_("No password file\n"));
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#ifdef USE_SYSLOG
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syslog(LOG_WARN, "No password file\n");
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closelog ();
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#endif
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exit (1);
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}
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#if !defined(DEBUG) && defined(SULOGIN_ONLY_INIT)
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if (getppid () != 1) { /* parent must be INIT */
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#ifdef USE_SYSLOG
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syslog (LOG_WARN, "Pid == %d, not 1\n", getppid ());
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closelog ();
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#endif
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exit (1);
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}
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#endif
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if (! isatty (0) || ! isatty (1) || ! isatty (2)) {
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#ifdef USE_SYSLOG
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closelog ();
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#endif
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exit (1); /* must be a terminal */
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}
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while (*envp) /* add inherited environment, */
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addenv(*envp++, NULL); /* some variables change later */
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if ((cp = getdef_str("ENV_TZ")))
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addenv(*cp == '/' ? tz(cp) : cp, NULL);
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if ((cp = getdef_str("ENV_HZ")))
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addenv(cp, NULL); /* set the default $HZ, if one */
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(void) strcpy (name, "root"); /* KLUDGE!!! */
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signal (SIGALRM, catch); /* exit if the timer expires */
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alarm (ALARM); /* only wait so long ... */
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while (1) { /* repeatedly get login/password pairs */
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entry (name, &pwent); /* get entry from password file */
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if (pwent.pw_name == (char *) 0) {
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/*
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* Fail secure
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*/
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printf(_("No password entry for 'root'\n"));
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#ifdef USE_SYSLOG
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syslog (LOG_WARN, "No password entry for 'root'\n");
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closelog ();
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#endif
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exit (1);
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}
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/*
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* Here we prompt for the root password, or if no password is
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* given we just exit.
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*/
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/* get a password for root */
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cp = getpass(_("\nType control-d to proceed with normal startup,\n(or give root password for system maintenance):"));
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/*
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* XXX - can't enter single user mode if root password is empty.
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* I think this doesn't happen very often :-). But it will work
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* with standard getpass() (no NULL on EOF). --marekm
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*/
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if (!cp || !*cp) {
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#ifdef USE_SYSLOG
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syslog (LOG_INFO, "Normal startup\n");
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closelog ();
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#endif
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puts("\n");
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#ifdef TELINIT
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execl (PATH_TELINIT, "telinit", RUNLEVEL, (char *) 0);
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#endif
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exit (0);
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} else {
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STRFCPY(pass, cp);
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strzero(cp);
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}
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#ifdef AUTH_METHODS
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if (pwent.pw_name && pwent.pw_passwd[0] == '@') {
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if (pw_auth (pwent.pw_passwd + 1, name, PW_LOGIN, (char *) 0)) {
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#ifdef USE_SYSLOG
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syslog (LOG_WARN,
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"Incorrect root authentication");
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#endif
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continue;
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}
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goto auth_done;
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}
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#endif
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if (valid (pass, &pwent)) /* check encrypted passwords ... */
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break; /* ... encrypted passwords matched */
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#ifdef USE_SYSLOG
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syslog (LOG_WARN, "Incorrect root password\n");
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#endif
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sleep(2);
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puts (_("Login incorrect"));
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}
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#ifdef AUTH_METHODS
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auth_done:
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#endif
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strzero(pass);
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alarm (0);
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signal (SIGALRM, SIG_DFL);
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environ = newenvp; /* make new environment active */
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puts(_("Entering System Maintenance Mode\n"));
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#ifdef USE_SYSLOG
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syslog (LOG_INFO, "System Maintenance Mode\n");
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#endif
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#if 0 /* do we need all this? we are logging in as root anyway... --marekm */
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/*
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* Normally there would be a utmp entry for login to mung on
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* to get the tty name, date, etc. from. We don't need all that
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* stuff because we won't update the utmp or wtmp files. BUT!,
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* we do need the tty name so we can set the permissions and
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* ownership.
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*/
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if ((cp = ttyname (0))) { /* found entry in /dev/ */
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if (strncmp(cp, "/dev/", 5) == 0)
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cp += 5;
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strncpy(utent.ut_line, cp, sizeof utent.ut_line);
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}
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if (getenv ("IFS")) /* don't export user IFS ... */
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addenv("IFS= \t\n", NULL); /* ... instead, set a safe IFS */
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setup (&pwent, 0); /* set UID, GID, HOME, etc ... */
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#endif
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#ifdef USE_SYSLOG
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closelog ();
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#endif
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shell (pwent.pw_shell, (char *) 0); /* exec the shell finally. */
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/*NOTREACHED*/
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return (0);
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}
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