264 lines
6.1 KiB
C
264 lines
6.1 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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* Copyright (c) 2002 Networks Associates Technology, Inc.
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* All rights reserved.
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*
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* Portions of this software were developed for the FreeBSD Project by
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* ThinkSec AS and NAI Labs, the Security Research Division of Network
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* Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
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* ("CBOSS"), as part of the DARPA CHATS research program.
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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[] = "@(#)field.c 8.4 (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 <grp.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 "chpass.h"
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/* ARGSUSED */
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int
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p_login(char *p, struct passwd *pw, ENTRY *ep __unused)
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{
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if (!*p) {
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warnx("empty login field");
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return (-1);
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}
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if (*p == '-') {
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warnx("login names may not begin with a hyphen");
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return (-1);
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}
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if (!(pw->pw_name = strdup(p))) {
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warnx("can't save entry");
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return (-1);
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}
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if (strchr(p, '.'))
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warnx("\'.\' is dangerous in a login name");
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for (; *p; ++p)
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if (isupper(*p)) {
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warnx("upper-case letters are dangerous in a login name");
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break;
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}
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return (0);
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}
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/* ARGSUSED */
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int
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p_passwd(char *p, struct passwd *pw, ENTRY *ep __unused)
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{
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if (!(pw->pw_passwd = strdup(p))) {
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warnx("can't save password entry");
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return (-1);
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}
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return (0);
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}
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/* ARGSUSED */
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int
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p_uid(char *p, struct passwd *pw, ENTRY *ep __unused)
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{
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uid_t id;
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char *np;
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if (!*p) {
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warnx("empty uid field");
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return (-1);
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}
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if (!isdigit(*p)) {
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warnx("illegal uid");
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return (-1);
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}
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errno = 0;
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id = strtoul(p, &np, 10);
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if (*np || (id == (uid_t)ULONG_MAX && errno == ERANGE)) {
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warnx("illegal uid");
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return (-1);
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}
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pw->pw_uid = id;
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return (0);
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}
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/* ARGSUSED */
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int
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p_gid(char *p, struct passwd *pw, ENTRY *ep __unused)
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{
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struct group *gr;
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gid_t id;
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char *np;
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if (!*p) {
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warnx("empty gid field");
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return (-1);
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}
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if (!isdigit(*p)) {
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if (!(gr = getgrnam(p))) {
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warnx("unknown group %s", p);
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return (-1);
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}
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pw->pw_gid = gr->gr_gid;
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return (0);
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}
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errno = 0;
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id = strtoul(p, &np, 10);
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if (*np || (id == (uid_t)ULONG_MAX && errno == ERANGE)) {
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warnx("illegal gid");
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return (-1);
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}
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pw->pw_gid = id;
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return (0);
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}
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/* ARGSUSED */
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int
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p_class(char *p, struct passwd *pw, ENTRY *ep __unused)
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{
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if (!(pw->pw_class = strdup(p))) {
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warnx("can't save entry");
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return (-1);
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}
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return (0);
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}
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/* ARGSUSED */
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int
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p_change(char *p, struct passwd *pw, ENTRY *ep __unused)
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{
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if (!atot(p, &pw->pw_change))
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return (0);
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warnx("illegal date for change field");
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return (-1);
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}
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/* ARGSUSED */
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int
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p_expire(char *p, struct passwd *pw, ENTRY *ep __unused)
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{
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if (!atot(p, &pw->pw_expire))
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return (0);
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warnx("illegal date for expire field");
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return (-1);
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}
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/* ARGSUSED */
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int
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p_gecos(char *p, struct passwd *pw __unused, ENTRY *ep)
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{
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if (!(ep->save = strdup(p))) {
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warnx("can't save entry");
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return (-1);
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}
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return (0);
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}
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/* ARGSUSED */
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int
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p_hdir(char *p, struct passwd *pw, ENTRY *ep __unused)
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{
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if (!*p) {
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warnx("empty home directory field");
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return (-1);
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}
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if (!(pw->pw_dir = strdup(p))) {
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warnx("can't save entry");
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return (-1);
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}
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return (0);
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}
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/* ARGSUSED */
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int
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p_shell(char *p, struct passwd *pw, ENTRY *ep __unused)
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{
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char *t;
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struct stat sbuf;
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if (!*p) {
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pw->pw_shell = strdup(_PATH_BSHELL);
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return (0);
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}
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/* only admin can change from or to "restricted" shells */
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if (!master_mode && pw->pw_shell && !ok_shell(pw->pw_shell)) {
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warnx("%s: current shell non-standard", pw->pw_shell);
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return (-1);
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}
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if (!(t = ok_shell(p))) {
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if (!master_mode) {
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warnx("%s: non-standard shell", p);
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return (-1);
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}
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}
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else
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p = t;
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if (!(pw->pw_shell = strdup(p))) {
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warnx("can't save entry");
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return (-1);
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}
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if (stat(pw->pw_shell, &sbuf) < 0) {
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if (errno == ENOENT)
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warnx("WARNING: shell '%s' does not exist",
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pw->pw_shell);
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else
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warn("WARNING: can't stat shell '%s'", pw->pw_shell);
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return (0);
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}
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if (!S_ISREG(sbuf.st_mode)) {
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warnx("WARNING: shell '%s' is not a regular file",
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pw->pw_shell);
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return (0);
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}
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if ((sbuf.st_mode & (S_IXOTH | S_IXGRP | S_IXUSR)) == 0) {
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warnx("WARNING: shell '%s' is not executable", pw->pw_shell);
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return (0);
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}
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return (0);
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}
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