203 lines
6.1 KiB
C
203 lines
6.1 KiB
C
/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* 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[] = "from: @(#)edit.c 5.2 (Berkeley) 3/3/91";*/
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static char rcsid[] = "$Id: edit.c,v 1.3 1994/08/17 19:54:34 deraadt 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 <pwd.h>
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#include <errno.h>
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#include <stdio.h>
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#include <paths.h>
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#include <stdlib.h>
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#include <string.h>
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#include "chpass.h"
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extern char *tempname;
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void
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edit(pw)
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struct passwd *pw;
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{
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struct stat begin, end;
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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(1);
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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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(void)fprintf(stderr, "chpass: no changes made\n");
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pw_error((char *)NULL, 0, 0);
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}
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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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display(fd, pw)
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int fd;
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struct passwd *pw;
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{
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register char *p;
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FILE *fp;
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char *bp, *ok_shell(), *ttoa();
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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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"#Changing user database information for %s.\n", pw->pw_name);
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if (!uid) {
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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 [#]: %d\n", pw->pw_uid);
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(void)fprintf(fp, "Gid [# or name]: %d\n", 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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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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(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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(void)fprintf(fp, "Full Name: %s\n", p ? p : "");
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p = strsep(&bp, ",");
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(void)fprintf(fp, "Location: %s\n", p ? p : "");
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p = strsep(&bp, ",");
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(void)fprintf(fp, "Office Phone: %s\n", p ? p : "");
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p = strsep(&bp, ",");
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(void)fprintf(fp, "Home Phone: %s\n", p ? p : "");
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(void)fchown(fd, getuid(), getgid());
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(void)fclose(fp);
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}
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verify(pw)
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struct passwd *pw;
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{
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register ENTRY *ep;
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register char *p;
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FILE *fp;
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int len;
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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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while (fgets(buf, sizeof(buf), fp)) {
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if (!buf[0] || buf[0] == '#')
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continue;
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if (!(p = index(buf, '\n'))) {
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(void)fprintf(stderr, "chpass: line too long.\n");
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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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(void)fprintf(stderr,
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"chpass: unrecognized field.\n");
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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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(void)fprintf(stderr,
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"chpass: you may not change the %s field.\n",
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ep->prompt);
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goto bad;
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}
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if (!(p = index(buf, ':'))) {
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(void)fprintf(stderr,
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"chpass: line corrupted.\n");
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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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(void)fprintf(stderr,
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"chpass: illegal character in the \"%s\" field.\n",
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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) + 4;
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if (!(p = malloc(len))) {
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(void)fprintf(stderr, "chpass: %s\n", strerror(errno));
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exit(1);
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}
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(void)sprintf(pw->pw_gecos = p, "%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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if (snprintf(buf, sizeof(buf),
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"%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s",
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pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid, pw->pw_class,
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pw->pw_change, pw->pw_expire, pw->pw_gecos, pw->pw_dir,
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pw->pw_shell) >= sizeof(buf)) {
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(void)fprintf(stderr, "chpass: entries too long\n");
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return(0);
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}
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return(pw_scan(buf, pw));
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}
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