290 lines
7.7 KiB
C
290 lines
7.7 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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* 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[] = "@(#)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 <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 <libutil.h>
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#include "chpass.h"
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static int display(const char *tfn, struct passwd *pw);
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static struct passwd *verify(const char *tfn, struct passwd *pw);
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struct passwd *
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edit(const char *tfn, struct passwd *pw)
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{
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struct passwd *npw;
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char *line;
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size_t len;
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if (display(tfn, pw) == -1)
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return (NULL);
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for (;;) {
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switch (pw_edit(1)) {
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case -1:
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return (NULL);
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case 0:
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return (pw_dup(pw));
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default:
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break;
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}
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if ((npw = verify(tfn, pw)) != NULL)
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return (npw);
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free(npw);
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printf("re-edit the password file? ");
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fflush(stdout);
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if ((line = fgetln(stdin, &len)) == NULL) {
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warn("fgetln()");
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return (NULL);
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}
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if (len > 0 && (*line == 'N' || *line == 'n'))
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return (NULL);
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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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static int
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display(const char *tfn, 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 = fopen(tfn, "w")) == NULL) {
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warn("%s", tfn);
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return (-1);
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}
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(void)fprintf(fp,
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"#Changing user information for %s.\n", pw->pw_name);
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if (master_mode) {
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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)) ||
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master_mode)
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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 || master_mode)
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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 || master_mode)
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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 || master_mode)
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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 || master_mode)
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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 || master_mode)
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(void)fprintf(fp, "Other information: %s\n", bp);
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(void)fchown(fileno(fp), getuid(), getgid());
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(void)fclose(fp);
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return (0);
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}
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static struct passwd *
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verify(const char *tfn, struct passwd *pw)
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{
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struct passwd *npw;
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ENTRY *ep;
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char *buf, *p, *val;
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struct stat sb;
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FILE *fp;
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int line;
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size_t len;
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if ((pw = pw_dup(pw)) == NULL)
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return (NULL);
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if ((fp = fopen(tfn, "r")) == NULL ||
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fstat(fileno(fp), &sb) == -1) {
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warn("%s", tfn);
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free(pw);
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return (NULL);
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}
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if (sb.st_size == 0) {
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warnx("corrupted temporary file");
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fclose(fp);
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free(pw);
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return (NULL);
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}
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val = NULL;
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for (line = 1; (buf = fgetln(fp, &len)) != NULL; ++line) {
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if (*buf == '\0' || *buf == '#')
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continue;
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while (len > 0 && isspace(buf[len - 1]))
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--len;
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for (ep = list;; ++ep) {
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if (!ep->prompt) {
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warnx("%s: unrecognized field on line %d",
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tfn, line);
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goto bad;
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}
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if (ep->len > len)
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continue;
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if (strncasecmp(buf, ep->prompt, ep->len) != 0)
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continue;
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if (ep->restricted && !master_mode) {
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warnx("%s: you may not change the %s field",
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tfn, ep->prompt);
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goto bad;
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}
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for (p = buf; p < buf + len && *p != ':'; ++p)
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/* nothing */ ;
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if (*p != ':') {
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warnx("%s: line %d corrupted", tfn, line);
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goto bad;
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}
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while (++p < buf + len && isspace(*p))
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/* nothing */ ;
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free(val);
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asprintf(&val, "%.*s", (int)(buf + len - p), p);
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if (val == NULL)
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goto bad;
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if (ep->except && strpbrk(val, ep->except)) {
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warnx("%s: invalid character in \"%s\" field '%s'",
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tfn, ep->prompt, val);
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goto bad;
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}
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if ((ep->func)(val, pw, ep))
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goto bad;
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break;
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}
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}
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free(val);
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fclose(fp);
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/* Build the gecos field. */
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len = asprintf(&p, "%s,%s,%s,%s,%s", list[E_NAME].save,
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list[E_LOCATE].save, list[E_BPHONE].save,
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list[E_HPHONE].save, list[E_OTHER].save);
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if (p == NULL) {
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warn("asprintf()");
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free(pw);
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return (NULL);
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}
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while (len > 0 && p[len - 1] == ',')
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p[--len] = '\0';
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pw->pw_gecos = p;
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buf = pw_make(pw);
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free(pw);
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free(p);
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if (buf == NULL) {
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warn("pw_make()");
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return (NULL);
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}
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npw = pw_scan(buf, PWSCAN_WARN|PWSCAN_MASTER);
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free(buf);
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return (npw);
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bad:
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free(pw);
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free(val);
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fclose(fp);
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return (NULL);
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}
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