afa6d859f0
1) Fix up vendor IDs for files I'm touching and put FBSDID in the right place. 2) Cast return value of snprintf to size_t rather than casting sizeof() to an int, 'cos we know snprintf returns a non-genative number. 3) Avoid 'char *blank = "";' by just strduping. This could be bad sometimes, but all these variables usually point at malloced memory so this makes them always point at malloced memory.
270 lines
7.5 KiB
C
270 lines
7.5 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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#if 0
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#ifndef lint
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static char sccsid[] = "@(#)edit.c 8.3 (Berkeley) 4/2/94";
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#endif /* not lint */
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/stat.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 <md5.h>
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#include <paths.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 "chpass.h"
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#ifdef YP
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#include "pw_yp.h"
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#endif /* YP */
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extern char *tempname;
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void
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edit(struct passwd *pw)
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{
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struct stat begin, end;
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char *begin_sum, *end_sum;
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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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begin_sum = MD5File(tempname, (char *)NULL);
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pw_edit(1);
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if (stat(tempname, &end))
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pw_error(tempname, 1, 1);
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end_sum = MD5File(tempname, (char *)NULL);
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if ((begin.st_mtime == end.st_mtime) &&
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(strcmp(begin_sum, end_sum) == 0)) {
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warnx("no changes made");
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pw_error(NULL, 0, 0);
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}
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free(begin_sum);
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free(end_sum);
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if (verify(pw))
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break;
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pw_prompt();
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}
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}
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/*
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* display --
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* print out the file for the user to edit; strange side-effect:
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* set conditional flag if the user gets to edit the shell.
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*/
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void
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display(int fd, struct passwd *pw)
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{
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FILE *fp;
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char *bp, *p;
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if (!(fp = fdopen(fd, "w")))
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pw_error(tempname, 1, 1);
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(void)fprintf(fp,
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#ifdef YP
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"#Changing %s information for %s.\n", _use_yp ? "NIS" : "user database", pw->pw_name);
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if (!uid && (!_use_yp || suser_override)) {
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#else
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"#Changing user database information for %s.\n", pw->pw_name);
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if (!uid) {
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#endif /* YP */
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(void)fprintf(fp, "Login: %s\n", pw->pw_name);
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(void)fprintf(fp, "Password: %s\n", pw->pw_passwd);
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(void)fprintf(fp, "Uid [#]: %lu\n", (unsigned long)pw->pw_uid);
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(void)fprintf(fp, "Gid [# or name]: %lu\n",
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(unsigned long)pw->pw_gid);
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(void)fprintf(fp, "Change [month day year]: %s\n",
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ttoa(pw->pw_change));
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(void)fprintf(fp, "Expire [month day year]: %s\n",
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ttoa(pw->pw_expire));
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(void)fprintf(fp, "Class: %s\n", pw->pw_class);
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(void)fprintf(fp, "Home directory: %s\n", pw->pw_dir);
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(void)fprintf(fp, "Shell: %s\n",
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*pw->pw_shell ? pw->pw_shell : _PATH_BSHELL);
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}
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/* Only admin can change "restricted" shells. */
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#if 0
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else if (ok_shell(pw->pw_shell))
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/*
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* Make shell a restricted field. Ugly with a
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* necklace, but there's not much else to do.
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*/
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#else
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else if ((!list[E_SHELL].restricted && ok_shell(pw->pw_shell)) || !uid)
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/*
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* If change not restrict (table.c) and standard shell
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* OR if root, then allow editing of shell.
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*/
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#endif
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(void)fprintf(fp, "Shell: %s\n",
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*pw->pw_shell ? pw->pw_shell : _PATH_BSHELL);
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else
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list[E_SHELL].restricted = 1;
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bp = pw->pw_gecos;
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p = strsep(&bp, ",");
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p = strdup(p ? p : "");
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list[E_NAME].save = p;
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if (!list[E_NAME].restricted || !uid)
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(void)fprintf(fp, "Full Name: %s\n", p);
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p = strsep(&bp, ",");
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p = strdup(p ? p : "");
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list[E_LOCATE].save = p;
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if (!list[E_LOCATE].restricted || !uid)
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(void)fprintf(fp, "Office Location: %s\n", p);
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p = strsep(&bp, ",");
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p = strdup(p ? p : "");
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list[E_BPHONE].save = p;
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if (!list[E_BPHONE].restricted || !uid)
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(void)fprintf(fp, "Office Phone: %s\n", p);
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p = strsep(&bp, ",");
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p = strdup(p ? p : "");
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list[E_HPHONE].save = p;
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if (!list[E_HPHONE].restricted || !uid)
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(void)fprintf(fp, "Home Phone: %s\n", p);
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bp = strdup(bp ? bp : "");
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list[E_OTHER].save = bp;
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if (!list[E_OTHER].restricted || !uid)
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(void)fprintf(fp, "Other information: %s\n", bp);
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(void)fchown(fd, getuid(), getgid());
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(void)fclose(fp);
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}
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int
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verify(struct passwd *pw)
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{
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ENTRY *ep;
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char *p;
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struct stat sb;
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FILE *fp;
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int len, line;
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static char buf[LINE_MAX];
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if (!(fp = fopen(tempname, "r")))
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pw_error(tempname, 1, 1);
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if (fstat(fileno(fp), &sb))
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pw_error(tempname, 1, 1);
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if (sb.st_size == 0) {
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warnx("corrupted temporary file");
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goto bad;
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}
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line = 0;
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while (fgets(buf, sizeof(buf), fp)) {
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line++;
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if (!buf[0] || buf[0] == '#')
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continue;
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if (!(p = strchr(buf, '\n'))) {
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warnx("line %d too long", line);
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goto bad;
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}
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*p = '\0';
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for (ep = list;; ++ep) {
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if (!ep->prompt) {
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warnx("unrecognized field on line %d", line);
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goto bad;
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}
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if (!strncasecmp(buf, ep->prompt, ep->len)) {
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if (ep->restricted && uid) {
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warnx(
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"you may not change the %s field",
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ep->prompt);
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goto bad;
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}
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if (!(p = strchr(buf, ':'))) {
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warnx("line %d corrupted", line);
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goto bad;
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}
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while (isspace(*++p));
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if (ep->except && strpbrk(p, ep->except)) {
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warnx(
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"illegal character in the \"%s\" field",
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ep->prompt);
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goto bad;
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}
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if ((ep->func)(p, pw, ep)) {
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bad: (void)fclose(fp);
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return (0);
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}
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break;
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}
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}
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}
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(void)fclose(fp);
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/* Build the gecos field. */
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len = strlen(list[E_NAME].save) + strlen(list[E_BPHONE].save) +
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strlen(list[E_HPHONE].save) + strlen(list[E_LOCATE].save) +
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strlen(list[E_OTHER].save) + 5;
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if (!(p = malloc(len)))
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err(1, NULL);
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(void)sprintf(pw->pw_gecos = p, "%s,%s,%s,%s,%s", list[E_NAME].save,
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list[E_LOCATE].save, list[E_BPHONE].save, list[E_HPHONE].save,
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list[E_OTHER].save);
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while ((len = strlen(pw->pw_gecos)) && pw->pw_gecos[len - 1] == ',')
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pw->pw_gecos[len - 1] = '\0';
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if ((size_t)snprintf(buf, sizeof(buf),
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"%s:%s:%lu:%lu:%s:%ld:%ld:%s:%s:%s",
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pw->pw_name, pw->pw_passwd, (unsigned long)pw->pw_uid,
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(unsigned long)pw->pw_gid, pw->pw_class, (long)pw->pw_change,
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(long)pw->pw_expire, pw->pw_gecos, pw->pw_dir,
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pw->pw_shell) >= sizeof(buf)) {
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warnx("entries too long");
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free(p);
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return (0);
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}
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free(p);
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return (__pw_scan(buf, pw, _PWSCAN_WARN|_PWSCAN_MASTER));
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}
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