07ce2a90b3
not documented as doing so. This fixes a potential segmentation violation. PR: 14465 Reported by: Tony Finch <fanf@demon.net>
150 lines
4.0 KiB
C
150 lines
4.0 KiB
C
/*
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* Copyright (c) 1987, 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 const char copyright[] =
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"@(#) Copyright (c) 1987, 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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#if 0
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static char sccsid[] = "@(#)vipw.c 8.3 (Berkeley) 4/2/94";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <err.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_util.h"
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extern char *mppath;
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extern char *masterpasswd;
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char *tempname;
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void copyfile __P((int, int));
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static 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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int pfd, tfd;
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struct stat begin, end;
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int ch;
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while ((ch = getopt(argc, argv, "d:")) != -1)
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switch (ch) {
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case 'd':
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if ((masterpasswd = malloc(strlen(optarg) +
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strlen(_MASTERPASSWD) + 2)) == NULL)
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err(1, NULL);
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strcpy(masterpasswd, optarg);
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if (masterpasswd[strlen(masterpasswd) - 1] != '/')
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strcat(masterpasswd, "/" _MASTERPASSWD);
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else
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strcat(masterpasswd, _MASTERPASSWD);
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if ((mppath = strdup(optarg)) == NULL)
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err(1, NULL);
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if (mppath[strlen(mppath) - 1] == '/')
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mppath[strlen(mppath) - 1] = '\0';
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break;
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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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if (argc != 0)
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usage();
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pw_init();
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pfd = pw_lock();
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tfd = pw_tmp();
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copyfile(pfd, tfd);
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(void)close(tfd);
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/* Force umask for partial writes made in the edit phase */
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(void)umask(077);
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for (;;) {
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if (stat(tempname, &begin))
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pw_error(tempname, 1, 1);
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pw_edit(0);
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if (stat(tempname, &end))
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pw_error(tempname, 1, 1);
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if (begin.st_mtime == end.st_mtime) {
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warnx("no changes made");
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pw_error((char *)NULL, 0, 0);
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}
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if (pw_mkdb((char *)NULL))
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break;
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pw_prompt();
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}
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exit(0);
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}
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void
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copyfile(from, to)
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int from, to;
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{
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int nr, nw, off;
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char buf[8*1024];
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while ((nr = read(from, buf, sizeof(buf))) > 0)
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for (off = 0; off < nr; nr -= nw, off += nw)
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if ((nw = write(to, buf + off, nr)) < 0)
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pw_error(tempname, 1, 1);
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if (nr < 0)
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pw_error(masterpasswd, 1, 1);
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}
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static void
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usage()
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{
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(void)fprintf(stderr, "usage: vipw [ -d directory ]\n");
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exit(1);
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}
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