NetBSD/usr.bin/chpass/field.c

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1993-03-21 12:45:37 +03:00
/*
* Copyright (c) 1988 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
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/*static char sccsid[] = "from: @(#)field.c 5.13 (Berkeley) 2/12/91";*/
static char rcsid[] = "$Id: field.c,v 1.2 1993/08/01 18:17:57 mycroft Exp $";
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#endif /* not lint */
#include <sys/param.h>
#include <pwd.h>
#include <grp.h>
#include <string.h>
#include <stdio.h>
#include <ctype.h>
#include "chpass.h"
#include "pathnames.h"
/* ARGSUSED */
p_login(p, pw, ep)
char *p;
struct passwd *pw;
ENTRY *ep;
{
if (!*p) {
(void)fprintf(stderr, "chpass: empty login field.\n");
return(1);
}
if (*p == '-') {
(void)fprintf(stderr,
"chpass: login names may not begin with a hyphen.\n");
return(1);
}
if (!(pw->pw_name = strdup(p))) {
(void)fprintf(stderr, "chpass: can't save entry.\n");
return(1);
}
if (index(p, '.'))
(void)fprintf(stderr,
"chpass: \'.\' is dangerous in a login name.\n");
for (; *p; ++p)
if (isupper(*p)) {
(void)fprintf(stderr,
"chpass: upper-case letters are dangerous in a login name.\n");
break;
}
return(0);
}
/* ARGSUSED */
p_passwd(p, pw, ep)
char *p;
struct passwd *pw;
ENTRY *ep;
{
if (!*p)
pw->pw_passwd = ""; /* "NOLOGIN"; */
else if (!(pw->pw_passwd = strdup(p))) {
(void)fprintf(stderr, "chpass: can't save password entry.\n");
return(1);
}
return(0);
}
/* ARGSUSED */
p_uid(p, pw, ep)
register char *p;
struct passwd *pw;
ENTRY *ep;
{
int id;
if (!*p) {
(void)fprintf(stderr, "chpass: empty uid field.\n");
return(1);
}
if (!isdigit(*p)) {
(void)fprintf(stderr, "chpass: illegal uid.\n");
return(1);
}
id = atoi(p);
if ((u_int)id > USHRT_MAX) {
(void)fprintf(stderr, "chpass: %d > max uid value (%d).\n",
id, USHRT_MAX);
return(1);
}
pw->pw_uid = id;
return(0);
}
/* ARGSUSED */
p_gid(p, pw, ep)
register char *p;
struct passwd *pw;
ENTRY *ep;
{
struct group *gr;
int id;
if (!*p) {
(void)fprintf(stderr, "chpass: empty gid field.\n");
return(1);
}
if (!isdigit(*p)) {
if (!(gr = getgrnam(p))) {
(void)fprintf(stderr,
"chpass: unknown group %s.\n", p);
return(1);
}
pw->pw_gid = gr->gr_gid;
return(0);
}
id = atoi(p);
if ((u_int)id > USHRT_MAX) {
(void)fprintf(stderr, "chpass: %d > max gid value (%d).\n",
id, USHRT_MAX);
return(1);
}
pw->pw_gid = id;
return(0);
}
/* ARGSUSED */
p_class(p, pw, ep)
char *p;
struct passwd *pw;
ENTRY *ep;
{
if (!*p)
pw->pw_class = "";
else if (!(pw->pw_class = strdup(p))) {
(void)fprintf(stderr, "chpass: can't save entry.\n");
return(1);
}
return(0);
}
/* ARGSUSED */
p_change(p, pw, ep)
char *p;
struct passwd *pw;
ENTRY *ep;
{
if (!atot(p, &pw->pw_change))
return(0);
(void)fprintf(stderr, "chpass: illegal date for change field.\n");
return(1);
}
/* ARGSUSED */
p_expire(p, pw, ep)
char *p;
struct passwd *pw;
ENTRY *ep;
{
if (!atot(p, &pw->pw_expire))
return(0);
(void)fprintf(stderr, "chpass: illegal date for expire field.\n");
return(1);
}
/* ARGSUSED */
p_gecos(p, pw, ep)
char *p;
struct passwd *pw;
ENTRY *ep;
{
if (!*p)
ep->save = "";
else if (!(ep->save = strdup(p))) {
(void)fprintf(stderr, "chpass: can't save entry.\n");
return(1);
}
return(0);
}
/* ARGSUSED */
p_hdir(p, pw, ep)
char *p;
struct passwd *pw;
ENTRY *ep;
{
if (!*p) {
(void)fprintf(stderr, "chpass: empty home directory field.\n");
return(1);
}
if (!(pw->pw_dir = strdup(p))) {
(void)fprintf(stderr, "chpass: can't save entry.\n");
return(1);
}
return(0);
}
/* ARGSUSED */
p_shell(p, pw, ep)
register char *p;
struct passwd *pw;
ENTRY *ep;
{
char *t, *ok_shell();
if (!*p) {
pw->pw_shell = _PATH_BSHELL;
return(0);
}
/* only admin can change from or to "restricted" shells */
if (uid && pw->pw_shell && !ok_shell(pw->pw_shell)) {
(void)fprintf(stderr,
"chpass: %s: current shell non-standard.\n", pw->pw_shell);
return(1);
}
if (!(t = ok_shell(p))) {
if (uid) {
(void)fprintf(stderr,
"chpass: %s: non-standard shell.\n", p);
return(1);
}
}
else
p = t;
if (!(pw->pw_shell = strdup(p))) {
(void)fprintf(stderr, "chpass: can't save entry.\n");
return(1);
}
return(0);
}