175 lines
4.7 KiB
C
175 lines
4.7 KiB
C
/*-
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* Copyright (c) 1990, 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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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#ifndef lint
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static char sccsid[] = "@(#)pw_util.c 8.3 (Berkeley) 4/2/94";
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#endif /* not lint */
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/*
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* This file is used by all the "password" programs; vipw(8), chpass(1),
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* and passwd(1).
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*/
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <paths.h>
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#include <pwd.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 <unistd.h>
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#include <pw_util.h>
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#include "yppasswdd_extern.h"
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int pstat;
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pid_t pid;
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void
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pw_init()
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{
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struct rlimit rlim;
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/* Unlimited resource limits. */
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rlim.rlim_cur = rlim.rlim_max = RLIM_INFINITY;
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(void)setrlimit(RLIMIT_CPU, &rlim);
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(void)setrlimit(RLIMIT_FSIZE, &rlim);
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(void)setrlimit(RLIMIT_STACK, &rlim);
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(void)setrlimit(RLIMIT_DATA, &rlim);
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(void)setrlimit(RLIMIT_RSS, &rlim);
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/* Don't drop core (not really necessary, but GP's). */
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rlim.rlim_cur = rlim.rlim_max = 0;
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(void)setrlimit(RLIMIT_CORE, &rlim);
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/* Turn off signals. */
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/* (void)signal(SIGALRM, SIG_IGN); */
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(void)signal(SIGHUP, SIG_IGN);
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(void)signal(SIGINT, SIG_IGN);
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(void)signal(SIGPIPE, SIG_IGN);
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(void)signal(SIGQUIT, SIG_IGN);
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(void)signal(SIGTSTP, SIG_IGN);
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(void)signal(SIGTTOU, SIG_IGN);
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/* Create with exact permissions. */
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(void)umask(0);
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}
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static int lockfd;
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int
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pw_lock()
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{
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/*
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* If the master password file doesn't exist, the system is hosed.
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* Might as well try to build one. Set the close-on-exec bit so
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* that users can't get at the encrypted passwords while editing.
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* Open should allow flock'ing the file; see 4.4BSD. XXX
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*/
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lockfd = open(passfile, O_RDONLY, 0);
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if (lockfd < 0 || fcntl(lockfd, F_SETFD, 1) == -1) {
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yp_error("%s: %s", passfile, strerror(errno));
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return (-1);
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}
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if (flock(lockfd, LOCK_EX|LOCK_NB)) {
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yp_error("%s: the password db file is busy", passfile);
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return(-1);
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}
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return (lockfd);
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}
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int
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pw_tmp()
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{
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static char path[MAXPATHLEN];
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int fd;
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char *p;
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sprintf(path,"%s",passfile);
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if ((p = strrchr(path, '/')))
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++p;
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else
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p = path;
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strcpy(p, "pw.XXXXXX");
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if ((fd = mkstemp(path)) == -1) {
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yp_error("%s: %s", path, strerror(errno));
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return(-1);
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}
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tempname = path;
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return (fd);
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}
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int
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pw_mkdb()
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{
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yp_error("rebuilding the database...");
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(void)fflush(stderr);
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/* Temporarily turn off SIGCHLD catching */
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install_reaper(0);
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if (!(pid = vfork())) {
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execl(_PATH_PWD_MKDB, "pwd_mkdb", "-p", tempname, NULL);
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pw_error(_PATH_PWD_MKDB, 1, 1);
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return(-1);
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}
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/* Handle this ourselves. */
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reaper(-1);
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/* Put the handler back. Foo. */
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install_reaper(1);
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if (pid == -1 || !WIFEXITED(pstat) || WEXITSTATUS(pstat) != 0) {
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return (-1);
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}
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yp_error("done");
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return (0);
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}
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void
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pw_error(name, err, eval)
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char *name;
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int err, eval;
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{
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if (err && name != NULL)
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yp_error("%s", name);
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yp_error("%s: unchanged", passfile);
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(void)unlink(tempname);
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}
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