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- /*
- * 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
- static char sccsid[] = "@(#)field.c 5.13 (Berkeley) 2/12/91";
- #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);
- }
-