79a1b8d9e2
option to pwd_mkdb and adding this option to utilities invoking it. Further, the filling of both the secure and insecure databases has been merged into one loop giving also a performance improvemnet. Note that I did *not* change the adduser command. I don't read perl (it is a write only language anyway). The change will drastically improve performance for passwd and friends with large passwd files. Vipw's performance won't change. In order to do that some kind of diff should be made between the old and new master.passwd and depending the amount of changes, an incremental or complete update of the databases should be agreed upon.
281 lines
6.8 KiB
C
281 lines
6.8 KiB
C
/*-
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* Copyright (c) 1988, 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 copyright[] =
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"@(#) Copyright (c) 1988, 1993, 1994\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "From: @(#)chpass.c 8.4 (Berkeley) 4/2/94";
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static char rcsid[] =
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"$Id: chpass.c,v 1.8 1996/05/25 01:05:17 wpaul Exp $";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <sys/signal.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <ctype.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 <pwd.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_scan.h>
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#include <pw_util.h>
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#include "pw_copy.h"
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#ifdef YP
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#include <rpcsvc/yp.h>
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int yp_errno = YP_TRUE;
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#include "pw_yp.h"
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#endif
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#include "chpass.h"
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#include "pathnames.h"
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char *tempname;
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uid_t uid;
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void baduser __P((void));
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void usage __P((void));
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int
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main(argc, argv)
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int argc;
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char **argv;
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{
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enum { NEWSH, LOADENTRY, EDITENTRY, NEWPW } op;
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struct passwd *pw, lpw;
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char *username;
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int ch, pfd, tfd;
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char *arg;
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#ifdef YP
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int force_local = 0;
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int force_yp = 0;
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#endif
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op = EDITENTRY;
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#ifdef YP
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while ((ch = getopt(argc, argv, "a:p:s:d:h:oly")) != EOF)
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#else
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while ((ch = getopt(argc, argv, "a:p:s:")) != EOF)
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#endif
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switch(ch) {
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case 'a':
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op = LOADENTRY;
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arg = optarg;
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break;
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case 's':
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op = NEWSH;
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arg = optarg;
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break;
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case 'p':
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op = NEWPW;
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arg = optarg;
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break;
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#ifdef YP
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case 'h':
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#ifdef PARANOID
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if (getuid()) {
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warnx("Only the superuser can use the -h flag");
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} else {
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#endif
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yp_server = optarg;
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#ifdef PARANOID
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}
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#endif
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break;
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case 'd':
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#ifdef PARANOID
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if (getuid()) {
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warnx("Only the superuser can use the -d flag");
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} else {
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#endif
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yp_domain = optarg;
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if (yp_server == NULL)
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yp_server = "localhost";
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#ifdef PARANOID
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}
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#endif
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break;
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case 'l':
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_use_yp = 0;
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force_local = 1;
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break;
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case 'y':
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_use_yp = force_yp = 1;
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break;
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case 'o':
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force_old++;
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break;
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#endif
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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uid = getuid();
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if (op == EDITENTRY || op == NEWSH || op == NEWPW)
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switch(argc) {
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#ifdef YP
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case 0:
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GETPWUID(uid)
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get_yp_master(1); /* XXX just to set the suser flag */
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break;
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case 1:
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GETPWNAM(*argv)
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get_yp_master(1); /* XXX just to set the suser flag */
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#else
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case 0:
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if (!(pw = getpwuid(uid)))
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errx(1, "unknown user: uid %u", uid);
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break;
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case 1:
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if (!(pw = getpwnam(*argv)))
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errx(1, "unknown user: %s", *argv);
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#endif
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if (uid && uid != pw->pw_uid)
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baduser();
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break;
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default:
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usage();
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}
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username = pw->pw_name;
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if (op == NEWSH) {
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/* protect p_shell -- it thinks NULL is /bin/sh */
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if (!arg[0])
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usage();
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if (p_shell(arg, pw, (ENTRY *)NULL))
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pw_error((char *)NULL, 0, 1);
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}
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if (op == LOADENTRY) {
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if (uid)
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baduser();
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pw = &lpw;
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if (!pw_scan(arg, pw))
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exit(1);
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}
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if (op == NEWPW) {
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if (uid)
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baduser();
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if(strchr(arg, ':')) {
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errx(1, "invalid format for password");
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}
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pw->pw_passwd = arg;
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}
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/*
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* The temporary file/file descriptor usage is a little tricky here.
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* 1: We start off with two fd's, one for the master password
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* file (used to lock everything), and one for a temporary file.
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* 2: Display() gets an fp for the temporary file, and copies the
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* user's information into it. It then gives the temporary file
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* to the user and closes the fp, closing the underlying fd.
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* 3: The user edits the temporary file some number of times.
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* 4: Verify() gets an fp for the temporary file, and verifies the
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* contents. It can't use an fp derived from the step #2 fd,
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* because the user's editor may have created a new instance of
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* the file. Once the file is verified, its contents are stored
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* in a password structure. The verify routine closes the fp,
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* closing the underlying fd.
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* 5: Delete the temporary file.
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* 6: Get a new temporary file/fd. Pw_copy() gets an fp for it
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* file and copies the master password file into it, replacing
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* the user record with a new one. We can't use the first
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* temporary file for this because it was owned by the user.
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* Pw_copy() closes its fp, flushing the data and closing the
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* underlying file descriptor. We can't close the master
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* password fp, or we'd lose the lock.
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* 7: Call pw_mkdb() (which renames the temporary file) and exit.
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* The exit closes the master passwd fp/fd.
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*/
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pw_init();
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pfd = pw_lock();
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tfd = pw_tmp();
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if (op == EDITENTRY) {
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display(tfd, pw);
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edit(pw);
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(void)unlink(tempname);
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tfd = pw_tmp();
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}
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#ifdef YP
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if (_use_yp) {
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yp_submit(pw);
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(void)unlink(tempname);
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} else {
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#endif /* YP */
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pw_copy(pfd, tfd, pw);
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if (!pw_mkdb(username))
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pw_error((char *)NULL, 0, 1);
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#ifdef YP
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}
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#endif /* YP */
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exit(0);
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}
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void
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baduser()
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{
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errx(1, "%s", strerror(EACCES));
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}
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void
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usage()
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{
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(void)fprintf(stderr,
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#ifdef YP
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"usage: chpass [-l] [-y] [-d domain [-h host]] [-a list] [-p encpass] [-s shell] [user]\n");
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#else
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"usage: chpass [-a list] [-p encpass] [-s shell] [user]\n");
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#endif
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exit(1);
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}
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