84d9c625bf
- Fix for possible unset uid/gid in toproto
- Fix for default mtree style
- Update libelf
- Importing libexecinfo
- Resynchronize GCC, mpc, gmp, mpfr
- build.sh: Replace params with show-params.
This has been done as the make target has been renamed in the same
way, while a new target named params has been added. This new
target generates a file containing all the parameters, instead of
printing it on the console.
- Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
get getservbyport() out of the inner loop
Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
787 lines
19 KiB
C
787 lines
19 KiB
C
/* $NetBSD: login.c,v 1.103 2012/04/29 01:26:56 wiz Exp $ */
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/*-
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* Copyright (c) 1980, 1987, 1988, 1991, 1993, 1994
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* The Regents of the University of California. 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 the University 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 THE REGENTS 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 THE REGENTS 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 <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1980, 1987, 1988, 1991, 1993, 1994\
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The Regents of the University of California. All rights reserved.");
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)login.c 8.4 (Berkeley) 4/2/94";
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#endif
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__RCSID("$NetBSD: login.c,v 1.103 2012/04/29 01:26:56 wiz Exp $");
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#endif /* not lint */
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/*
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* login [ name ]
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* login -h hostname (for telnetd, etc.)
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* login -f name (for pre-authenticated login: datakit, xterm, etc.)
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*/
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <sys/file.h>
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#include <sys/wait.h>
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#include <sys/socket.h>
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#include <err.h>
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#include <errno.h>
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#include <grp.h>
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#include <pwd.h>
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#include <setjmp.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <syslog.h>
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#include <time.h>
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#include <ttyent.h>
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#include <tzfile.h>
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#include <unistd.h>
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#include <sysexits.h>
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#ifdef SUPPORT_UTMP
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#include <utmp.h>
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#endif
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#ifdef SUPPORT_UTMPX
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#include <utmpx.h>
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#endif
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#include <util.h>
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#ifdef SKEY
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#include <skey.h>
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#endif
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#ifdef KERBEROS5
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#include <krb5/krb5.h>
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#include <krb5/com_err.h>
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#endif
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#ifdef LOGIN_CAP
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#include <login_cap.h>
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#endif
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#include <vis.h>
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#include "pathnames.h"
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#include "common.h"
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#ifdef KERBEROS5
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int login_krb5_forwardable_tgt = 0;
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static int login_krb5_get_tickets = 1;
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static int login_krb5_retain_ccache = 0;
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#endif
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static void checknologin(char *);
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#ifdef KERBEROS5
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int k5login(struct passwd *, char *, char *, char *);
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void k5destroy(void);
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int k5_read_creds(const char *);
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int k5_write_creds(void);
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#endif
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#if defined(KERBEROS5)
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static void dofork(void);
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#endif
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static void usage(void) __attribute__((__noreturn__));
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#define TTYGRPNAME "tty" /* name of group to own ttys */
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#define DEFAULT_BACKOFF 3
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#define DEFAULT_RETRIES 10
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#if defined(KERBEROS5)
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int has_ccache = 0;
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int notickets = 1;
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extern krb5_context kcontext;
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extern int have_forward;
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static char *instance;
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extern char *krb5tkfile_env;
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extern int krb5_configured;
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#endif
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#if defined(KERBEROS5)
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#define KERBEROS_CONFIGURED krb5_configured
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#endif
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extern char **environ;
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int
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main(int argc, char *argv[])
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{
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struct group *gr;
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struct stat st;
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int ask, ch, cnt, fflag, hflag, pflag, sflag, quietlog, rootlogin, rval;
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int Fflag;
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uid_t uid, saved_uid;
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gid_t saved_gid, saved_gids[NGROUPS_MAX];
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int nsaved_gids;
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char *domain, *p, *ttyn;
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const char *pwprompt;
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char tbuf[MAXPATHLEN + 2], tname[sizeof(_PATH_TTY) + 10];
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char localhost[MAXHOSTNAMELEN + 1];
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int need_chpass, require_chpass;
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int login_retries = DEFAULT_RETRIES,
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login_backoff = DEFAULT_BACKOFF;
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time_t pw_warntime = _PASSWORD_WARNDAYS * SECSPERDAY;
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char *loginname = NULL;
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#ifdef KERBEROS5
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krb5_error_code kerror;
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#endif
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#if defined(KERBEROS5)
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int got_tickets = 0;
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#endif
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#ifdef LOGIN_CAP
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char *shell = NULL;
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login_cap_t *lc = NULL;
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#endif
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tbuf[0] = '\0';
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rval = 0;
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pwprompt = NULL;
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nested = NULL;
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need_chpass = require_chpass = 0;
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(void)signal(SIGALRM, timedout);
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(void)alarm(timeout);
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(void)signal(SIGQUIT, SIG_IGN);
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(void)signal(SIGINT, SIG_IGN);
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(void)setpriority(PRIO_PROCESS, 0, 0);
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openlog("login", 0, LOG_AUTH);
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/*
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* -p is used by getty to tell login not to destroy the environment
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* -f is used to skip a second login authentication
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* -h is used by other servers to pass the name of the remote host to
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* login so that it may be placed in utmp/utmpx and wtmp/wtmpx
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* -a in addition to -h, a server may supply -a to pass the actual
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* server address.
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* -s is used to force use of S/Key or equivalent.
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*/
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domain = NULL;
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if (gethostname(localhost, sizeof(localhost)) < 0)
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syslog(LOG_ERR, "couldn't get local hostname: %m");
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else
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domain = strchr(localhost, '.');
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localhost[sizeof(localhost) - 1] = '\0';
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Fflag = fflag = hflag = pflag = sflag = 0;
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have_ss = 0;
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#ifdef KERBEROS5
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have_forward = 0;
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#endif
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uid = getuid();
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while ((ch = getopt(argc, argv, "a:Ffh:ps")) != -1)
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switch (ch) {
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case 'a':
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if (uid)
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errx(EXIT_FAILURE, "-a option: %s", strerror(EPERM));
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decode_ss(optarg);
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#ifdef notdef
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(void)sockaddr_snprintf(optarg,
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sizeof(struct sockaddr_storage), "%a", (void *)&ss);
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#endif
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break;
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case 'F':
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Fflag = 1;
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/* FALLTHROUGH */
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case 'f':
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fflag = 1;
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break;
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case 'h':
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if (uid)
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errx(EXIT_FAILURE, "-h option: %s", strerror(EPERM));
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hflag = 1;
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#ifdef notdef
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if (domain && (p = strchr(optarg, '.')) != NULL &&
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strcasecmp(p, domain) == 0)
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*p = '\0';
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#endif
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hostname = optarg;
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break;
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case 'p':
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pflag = 1;
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break;
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case 's':
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sflag = 1;
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break;
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default:
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case '?':
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usage();
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break;
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}
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#if !defined(__minix)
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setproctitle(NULL);
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#endif /* !defined(__minix) */
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argc -= optind;
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argv += optind;
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if (*argv) {
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username = loginname = *argv;
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ask = 0;
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} else
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ask = 1;
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#ifdef F_CLOSEM
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(void)fcntl(3, F_CLOSEM, 0);
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#else
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for (cnt = getdtablesize(); cnt > 2; cnt--)
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(void)close(cnt);
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#endif
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ttyn = ttyname(STDIN_FILENO);
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if (ttyn == NULL || *ttyn == '\0') {
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(void)snprintf(tname, sizeof(tname), "%s??", _PATH_TTY);
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ttyn = tname;
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}
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if ((tty = strstr(ttyn, "/pts/")) != NULL)
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++tty;
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else if ((tty = strrchr(ttyn, '/')) != NULL)
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++tty;
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else
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tty = ttyn;
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if (issetugid()) {
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nested = strdup(user_from_uid(getuid(), 0));
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if (nested == NULL) {
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syslog(LOG_ERR, "strdup: %m");
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sleepexit(EXIT_FAILURE);
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}
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}
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#ifdef LOGIN_CAP
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/* Get "login-retries" and "login-backoff" from default class */
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if ((lc = login_getclass(NULL)) != NULL) {
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login_retries = (int)login_getcapnum(lc, "login-retries",
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DEFAULT_RETRIES, DEFAULT_RETRIES);
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login_backoff = (int)login_getcapnum(lc, "login-backoff",
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DEFAULT_BACKOFF, DEFAULT_BACKOFF);
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login_close(lc);
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lc = NULL;
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}
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#endif
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|
|
#ifdef KERBEROS5
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kerror = krb5_init_context(&kcontext);
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if (kerror) {
|
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/*
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|
* If Kerberos is not configured, that is, we are
|
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* not using Kerberos, do not log the error message.
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|
* However, if Kerberos is configured, and the
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* context init fails for some other reason, we need
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* to issue a no tickets warning to the user when the
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* login succeeds.
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*/
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if (kerror != ENXIO) { /* XXX NetBSD-local Heimdal hack */
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syslog(LOG_NOTICE,
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"%s when initializing Kerberos context",
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error_message(kerror));
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krb5_configured = 1;
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}
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login_krb5_get_tickets = 0;
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}
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#endif /* KERBEROS5 */
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|
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for (cnt = 0;; ask = 1) {
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#if defined(KERBEROS5)
|
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if (login_krb5_get_tickets)
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k5destroy();
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|
#endif
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if (ask) {
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fflag = 0;
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loginname = getloginname();
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|
}
|
|
rootlogin = 0;
|
|
#ifdef KERBEROS5
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if ((instance = strchr(loginname, '/')) != NULL)
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*instance++ = '\0';
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|
else
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|
instance = __UNCONST("");
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|
#endif
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username = trimloginname(loginname);
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|
/*
|
|
* Note if trying multiple user names; log failures for
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|
* previous user name, but don't bother logging one failure
|
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* for nonexistent name (mistyped username).
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|
*/
|
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if (failures && strcmp(tbuf, username)) {
|
|
if (failures > (pwd ? 0 : 1))
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badlogin(tbuf);
|
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failures = 0;
|
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}
|
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(void)strlcpy(tbuf, username, sizeof(tbuf));
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|
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pwd = getpwnam(username);
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|
|
#ifdef LOGIN_CAP
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/*
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|
* Establish the class now, before we might goto
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* within the next block. pwd can be NULL since it
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* falls back to the "default" class if it is.
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*/
|
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lc = login_getclass(pwd ? pwd->pw_class : NULL);
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#endif
|
|
/*
|
|
* if we have a valid account name, and it doesn't have a
|
|
* password, or the -f option was specified and the caller
|
|
* is root or the caller isn't changing their uid, don't
|
|
* authenticate.
|
|
*/
|
|
if (pwd) {
|
|
if (pwd->pw_uid == 0)
|
|
rootlogin = 1;
|
|
|
|
if (fflag && (uid == 0 || uid == pwd->pw_uid)) {
|
|
/* already authenticated */
|
|
#ifdef KERBEROS5
|
|
if (login_krb5_get_tickets && Fflag)
|
|
k5_read_creds(username);
|
|
#endif
|
|
break;
|
|
} else if (pwd->pw_passwd[0] == '\0') {
|
|
/* pretend password okay */
|
|
rval = 0;
|
|
goto ttycheck;
|
|
}
|
|
}
|
|
|
|
fflag = 0;
|
|
|
|
(void)setpriority(PRIO_PROCESS, 0, -4);
|
|
|
|
#ifdef SKEY
|
|
if (skey_haskey(username) == 0) {
|
|
static char skprompt[80];
|
|
const char *skinfo = skey_keyinfo(username);
|
|
|
|
(void)snprintf(skprompt, sizeof(skprompt),
|
|
"Password [ %s ]:",
|
|
skinfo ? skinfo : "error getting challenge");
|
|
pwprompt = skprompt;
|
|
} else
|
|
#endif
|
|
pwprompt = "Password:";
|
|
|
|
p = getpass(pwprompt);
|
|
|
|
if (pwd == NULL) {
|
|
rval = 1;
|
|
goto skip;
|
|
}
|
|
#ifdef KERBEROS5
|
|
if (login_krb5_get_tickets &&
|
|
k5login(pwd, instance, localhost, p) == 0) {
|
|
rval = 0;
|
|
got_tickets = 1;
|
|
}
|
|
#endif
|
|
#if defined(KERBEROS5)
|
|
if (got_tickets)
|
|
goto skip;
|
|
#endif
|
|
#ifdef SKEY
|
|
if (skey_haskey(username) == 0 &&
|
|
skey_passcheck(username, p) != -1) {
|
|
rval = 0;
|
|
goto skip;
|
|
}
|
|
#endif
|
|
if (!sflag && *pwd->pw_passwd != '\0' &&
|
|
!strcmp(crypt(p, pwd->pw_passwd), pwd->pw_passwd)) {
|
|
rval = 0;
|
|
require_chpass = 1;
|
|
goto skip;
|
|
}
|
|
rval = 1;
|
|
|
|
skip:
|
|
memset(p, 0, strlen(p));
|
|
|
|
(void)setpriority(PRIO_PROCESS, 0, 0);
|
|
|
|
ttycheck:
|
|
/*
|
|
* If trying to log in as root without Kerberos,
|
|
* but with insecure terminal, refuse the login attempt.
|
|
*/
|
|
if (pwd && !rval && rootlogin && !rootterm(tty)) {
|
|
(void)printf("Login incorrect or refused on this "
|
|
"terminal.\n");
|
|
if (hostname)
|
|
syslog(LOG_NOTICE,
|
|
"LOGIN %s REFUSED FROM %s ON TTY %s",
|
|
pwd->pw_name, hostname, tty);
|
|
else
|
|
syslog(LOG_NOTICE,
|
|
"LOGIN %s REFUSED ON TTY %s",
|
|
pwd->pw_name, tty);
|
|
continue;
|
|
}
|
|
|
|
if (pwd && !rval)
|
|
break;
|
|
|
|
(void)printf("Login incorrect or refused on this "
|
|
"terminal.\n");
|
|
failures++;
|
|
cnt++;
|
|
/*
|
|
* We allow login_retries tries, but after login_backoff
|
|
* we start backing off. These default to 10 and 3
|
|
* respectively.
|
|
*/
|
|
if (cnt > login_backoff) {
|
|
if (cnt >= login_retries) {
|
|
badlogin(username);
|
|
sleepexit(EXIT_FAILURE);
|
|
}
|
|
sleep((u_int)((cnt - login_backoff) * 5));
|
|
}
|
|
}
|
|
|
|
/* committed to login -- turn off timeout */
|
|
(void)alarm((u_int)0);
|
|
|
|
endpwent();
|
|
|
|
/* if user not super-user, check for disabled logins */
|
|
#ifdef LOGIN_CAP
|
|
if (!login_getcapbool(lc, "ignorenologin", rootlogin))
|
|
checknologin(login_getcapstr(lc, "nologin", NULL, NULL));
|
|
#else
|
|
if (!rootlogin)
|
|
checknologin(NULL);
|
|
#endif
|
|
|
|
#ifdef LOGIN_CAP
|
|
quietlog = login_getcapbool(lc, "hushlogin", 0);
|
|
#else
|
|
quietlog = 0;
|
|
#endif
|
|
/* Temporarily give up special privileges so we can change */
|
|
/* into NFS-mounted homes that are exported for non-root */
|
|
/* access and have mode 7x0 */
|
|
saved_uid = geteuid();
|
|
saved_gid = getegid();
|
|
nsaved_gids = getgroups(NGROUPS_MAX, saved_gids);
|
|
|
|
(void)setegid(pwd->pw_gid);
|
|
initgroups(username, pwd->pw_gid);
|
|
(void)seteuid(pwd->pw_uid);
|
|
|
|
if (chdir(pwd->pw_dir) < 0) {
|
|
#ifdef LOGIN_CAP
|
|
if (login_getcapbool(lc, "requirehome", 0)) {
|
|
(void)printf("Home directory %s required\n",
|
|
pwd->pw_dir);
|
|
sleepexit(EXIT_FAILURE);
|
|
}
|
|
#endif
|
|
(void)printf("No home directory %s!\n", pwd->pw_dir);
|
|
if (chdir("/") == -1)
|
|
exit(EXIT_FAILURE);
|
|
pwd->pw_dir = __UNCONST("/");
|
|
(void)printf("Logging in with home = \"/\".\n");
|
|
}
|
|
|
|
if (!quietlog)
|
|
quietlog = access(_PATH_HUSHLOGIN, F_OK) == 0;
|
|
|
|
/* regain special privileges */
|
|
(void)seteuid(saved_uid);
|
|
setgroups(nsaved_gids, saved_gids);
|
|
(void)setegid(saved_gid);
|
|
|
|
#ifdef LOGIN_CAP
|
|
pw_warntime = login_getcaptime(lc, "password-warn",
|
|
_PASSWORD_WARNDAYS * SECSPERDAY,
|
|
_PASSWORD_WARNDAYS * SECSPERDAY);
|
|
#endif
|
|
|
|
(void)gettimeofday(&now, NULL);
|
|
if (pwd->pw_expire) {
|
|
if (now.tv_sec >= pwd->pw_expire) {
|
|
(void)printf("Sorry -- your account has expired.\n");
|
|
sleepexit(EXIT_FAILURE);
|
|
} else if (pwd->pw_expire - now.tv_sec < pw_warntime &&
|
|
!quietlog)
|
|
(void)printf("Warning: your account expires on %s",
|
|
ctime(&pwd->pw_expire));
|
|
}
|
|
if (pwd->pw_change) {
|
|
if (pwd->pw_change == _PASSWORD_CHGNOW)
|
|
need_chpass = 1;
|
|
else if (now.tv_sec >= pwd->pw_change) {
|
|
(void)printf("Sorry -- your password has expired.\n");
|
|
sleepexit(EXIT_FAILURE);
|
|
} else if (pwd->pw_change - now.tv_sec < pw_warntime &&
|
|
!quietlog)
|
|
(void)printf("Warning: your password expires on %s",
|
|
ctime(&pwd->pw_change));
|
|
|
|
}
|
|
/* Nothing else left to fail -- really log in. */
|
|
update_db(quietlog, rootlogin, fflag);
|
|
|
|
(void)chown(ttyn, pwd->pw_uid,
|
|
(gr = getgrnam(TTYGRPNAME)) ? gr->gr_gid : pwd->pw_gid);
|
|
|
|
if (ttyaction(ttyn, "login", pwd->pw_name))
|
|
(void)printf("Warning: ttyaction failed.\n");
|
|
|
|
#if defined(KERBEROS5)
|
|
/* Fork so that we can call kdestroy */
|
|
if (! login_krb5_retain_ccache && has_ccache)
|
|
dofork();
|
|
#endif
|
|
|
|
/* Destroy environment unless user has requested its preservation. */
|
|
if (!pflag)
|
|
environ = envinit;
|
|
|
|
#ifdef LOGIN_CAP
|
|
if (nested == NULL && setusercontext(lc, pwd, pwd->pw_uid,
|
|
LOGIN_SETLOGIN) != 0) {
|
|
syslog(LOG_ERR, "setusercontext failed");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
if (setusercontext(lc, pwd, pwd->pw_uid,
|
|
(LOGIN_SETALL & ~(LOGIN_SETPATH|LOGIN_SETLOGIN))) != 0) {
|
|
syslog(LOG_ERR, "setusercontext failed");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
#else
|
|
(void)setgid(pwd->pw_gid);
|
|
|
|
initgroups(username, pwd->pw_gid);
|
|
|
|
#if !defined(__minix)
|
|
if (nested == NULL && setlogin(pwd->pw_name) < 0)
|
|
syslog(LOG_ERR, "setlogin() failure: %m");
|
|
#endif /* !defined(__minix) */
|
|
|
|
/* Discard permissions last so can't get killed and drop core. */
|
|
if (rootlogin)
|
|
(void)setuid(0);
|
|
else
|
|
(void)setuid(pwd->pw_uid);
|
|
#endif
|
|
|
|
if (*pwd->pw_shell == '\0')
|
|
pwd->pw_shell = __UNCONST(_PATH_BSHELL);
|
|
#ifdef LOGIN_CAP
|
|
if ((shell = login_getcapstr(lc, "shell", NULL, NULL)) != NULL) {
|
|
if ((shell = strdup(shell)) == NULL) {
|
|
syslog(LOG_ERR, "Cannot alloc mem");
|
|
sleepexit(EXIT_FAILURE);
|
|
}
|
|
pwd->pw_shell = shell;
|
|
}
|
|
#endif
|
|
|
|
(void)setenv("HOME", pwd->pw_dir, 1);
|
|
(void)setenv("SHELL", pwd->pw_shell, 1);
|
|
if (term[0] == '\0') {
|
|
const char *tt = stypeof(tty);
|
|
#ifdef LOGIN_CAP
|
|
if (tt == NULL)
|
|
tt = login_getcapstr(lc, "term", NULL, NULL);
|
|
#endif
|
|
/* unknown term -> "su" */
|
|
(void)strlcpy(term, tt != NULL ? tt : "su", sizeof(term));
|
|
}
|
|
(void)setenv("TERM", term, 0);
|
|
(void)setenv("LOGNAME", pwd->pw_name, 1);
|
|
(void)setenv("USER", pwd->pw_name, 1);
|
|
|
|
#ifdef LOGIN_CAP
|
|
setusercontext(lc, pwd, pwd->pw_uid, LOGIN_SETPATH);
|
|
#else
|
|
(void)setenv("PATH", _PATH_DEFPATH, 0);
|
|
#endif
|
|
|
|
#ifdef KERBEROS5
|
|
if (krb5tkfile_env)
|
|
(void)setenv("KRB5CCNAME", krb5tkfile_env, 1);
|
|
#endif
|
|
|
|
if (tty[sizeof("tty")-1] == 'd')
|
|
syslog(LOG_INFO, "DIALUP %s, %s", tty, pwd->pw_name);
|
|
|
|
/* If fflag is on, assume caller/authenticator has logged root login. */
|
|
if (rootlogin && fflag == 0) {
|
|
if (hostname)
|
|
syslog(LOG_NOTICE, "ROOT LOGIN (%s) ON %s FROM %s",
|
|
username, tty, hostname);
|
|
else
|
|
syslog(LOG_NOTICE, "ROOT LOGIN (%s) ON %s",
|
|
username, tty);
|
|
}
|
|
|
|
#if defined(KERBEROS5)
|
|
if (KERBEROS_CONFIGURED && !quietlog && notickets == 1)
|
|
(void)printf("Warning: no Kerberos tickets issued.\n");
|
|
#endif
|
|
|
|
if (!quietlog) {
|
|
const char *fname;
|
|
#ifdef LOGIN_CAP
|
|
fname = login_getcapstr(lc, "copyright", NULL, NULL);
|
|
if (fname != NULL && access(fname, F_OK) == 0)
|
|
motd(fname);
|
|
else
|
|
#endif
|
|
(void)printf("%s", copyrightstr);
|
|
|
|
#ifdef LOGIN_CAP
|
|
fname = login_getcapstr(lc, "welcome", NULL, NULL);
|
|
if (fname == NULL || access(fname, F_OK) != 0)
|
|
#endif
|
|
fname = _PATH_MOTDFILE;
|
|
motd(fname);
|
|
|
|
(void)snprintf(tbuf,
|
|
sizeof(tbuf), "%s/%s", _PATH_MAILDIR, pwd->pw_name);
|
|
if (stat(tbuf, &st) == 0 && st.st_size != 0)
|
|
(void)printf("You have %smail.\n",
|
|
(st.st_mtime > st.st_atime) ? "new " : "");
|
|
}
|
|
|
|
#ifdef LOGIN_CAP
|
|
login_close(lc);
|
|
#endif
|
|
|
|
(void)signal(SIGALRM, SIG_DFL);
|
|
(void)signal(SIGQUIT, SIG_DFL);
|
|
(void)signal(SIGINT, SIG_DFL);
|
|
(void)signal(SIGTSTP, SIG_IGN);
|
|
|
|
tbuf[0] = '-';
|
|
(void)strlcpy(tbuf + 1, (p = strrchr(pwd->pw_shell, '/')) ?
|
|
p + 1 : pwd->pw_shell, sizeof(tbuf) - 1);
|
|
|
|
/* Wait to change password until we're unprivileged */
|
|
if (need_chpass) {
|
|
if (!require_chpass)
|
|
(void)printf(
|
|
"Warning: your password has expired. Please change it as soon as possible.\n");
|
|
else {
|
|
int status;
|
|
|
|
(void)printf(
|
|
"Your password has expired. Please choose a new one.\n");
|
|
switch (fork()) {
|
|
case -1:
|
|
warn("fork");
|
|
sleepexit(EXIT_FAILURE);
|
|
case 0:
|
|
execl(_PATH_BINPASSWD, "passwd", NULL);
|
|
_exit(EXIT_FAILURE);
|
|
default:
|
|
if (wait(&status) == -1 ||
|
|
WEXITSTATUS(status))
|
|
sleepexit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifdef KERBEROS5
|
|
if (login_krb5_get_tickets)
|
|
k5_write_creds();
|
|
#endif
|
|
execlp(pwd->pw_shell, tbuf, NULL);
|
|
err(EXIT_FAILURE, "%s", pwd->pw_shell);
|
|
}
|
|
|
|
#if defined(KERBEROS5)
|
|
/*
|
|
* This routine handles cleanup stuff, and the like.
|
|
* It exists only in the child process.
|
|
*/
|
|
static void
|
|
dofork(void)
|
|
{
|
|
pid_t child, wchild;
|
|
|
|
switch (child = fork()) {
|
|
case 0:
|
|
return; /* Child process */
|
|
case -1:
|
|
err(EXIT_FAILURE, "Can't fork");
|
|
/*NOTREACHED*/
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Setup stuff? This would be things we could do in parallel
|
|
* with login
|
|
*/
|
|
if (chdir("/") == -1) /* Let's not keep the fs busy... */
|
|
err(EXIT_FAILURE, "Can't chdir to `/'");
|
|
|
|
/* If we're the parent, watch the child until it dies */
|
|
while ((wchild = wait(NULL)) != child)
|
|
if (wchild == -1)
|
|
err(EXIT_FAILURE, "Can't wait");
|
|
|
|
/* Cleanup stuff */
|
|
/* Run kdestroy to destroy tickets */
|
|
if (login_krb5_get_tickets)
|
|
k5destroy();
|
|
|
|
/* Leave */
|
|
exit(EXIT_SUCCESS);
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
checknologin(char *fname)
|
|
{
|
|
int fd, nchars;
|
|
char tbuf[8192];
|
|
|
|
if ((fd = open(fname ? fname : _PATH_NOLOGIN, O_RDONLY, 0)) >= 0) {
|
|
while ((nchars = read(fd, tbuf, sizeof(tbuf))) > 0)
|
|
(void)write(fileno(stdout), tbuf, nchars);
|
|
sleepexit(EXIT_SUCCESS);
|
|
}
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
(void)fprintf(stderr,
|
|
"Usage: %s [-Ffps] [-a address] [-h hostname] [username]\n",
|
|
getprogname());
|
|
exit(EXIT_FAILURE);
|
|
}
|