GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/chpass/edit.c Lines: 0 115 0.0 %
Date: 2017-11-13 Branches: 0 92 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: edit.c,v 1.35 2015/01/16 06:40:06 deraadt Exp $	*/
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/*	$NetBSD: edit.c,v 1.6 1996/05/15 21:50:45 jtc Exp $	*/
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/*-
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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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 *
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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. 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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#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 <fcntl.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 <limits.h>
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#include <util.h>
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#include "chpass.h"
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int
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edit(char *tempname, 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 (lstat(tempname, &begin) == -1 || S_ISLNK(begin.st_mode))
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			return (EDIT_ERROR);
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		pw_edit(1, tempname);
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		if (lstat(tempname, &end) == -1 || S_ISLNK(end.st_mode))
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			return (EDIT_ERROR);
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		if (!timespeccmp(&begin.st_mtimespec, &end.st_mtimespec, -) &&
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		    begin.st_size == end.st_size) {
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			warnx("no changes made");
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			return (EDIT_NOCHANGE);
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		}
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		if (verify(tempname, pw))
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			break;
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		pw_prompt();
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	}
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	return(EDIT_OK);
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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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void
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display(char *tempname, int fd, struct passwd *pw)
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{
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	FILE *fp;
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	char *bp, *p;
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	char chngstr[256];
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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, "Encrypted password: %s\n", pw->pw_passwd);
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		(void)fprintf(fp, "Uid [#]: %u\n", pw->pw_uid);
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		(void)fprintf(fp, "Gid [# or name]: %u\n", pw->pw_gid);
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		(void)fprintf(fp, "Change [month day year]: %s\n",
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		    ttoa(chngstr, sizeof(chngstr), pw->pw_change));
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		(void)fprintf(fp, "Expire [month day year]: %s\n",
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		    ttoa(chngstr, sizeof(chngstr), 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, NULL))
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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, "Office 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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int
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verify(char *tempname, struct passwd *pw)
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{
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	unsigned int line;
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	size_t alen;
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	static char buf[LINE_MAX];
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	struct stat sb;
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	char *p, *q;
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	ENTRY *ep;
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	FILE *fp;
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	int fd;
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	if ((fd = open(tempname, O_RDONLY|O_NOFOLLOW)) == -1 ||
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	    (fp = fdopen(fd, "r")) == NULL)
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		pw_error(tempname, 1, 1);
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	if (fstat(fd, &sb))
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		pw_error(tempname, 1, 1);
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	if (sb.st_size == 0 || sb.st_nlink != 1 || sb.st_uid != uid) {
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		warnx("corrupted temporary file");
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		goto bad;
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	}
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	line = 0;
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	while (fgets(buf, sizeof(buf), fp)) {
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		line++;
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		if (!buf[0] || buf[0] == '#')
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			continue;
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		if ((p = strchr(buf, '\n')) != NULL)
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			*p = '\0';
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		else if (!feof(fp)) {
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			warnx("line %u too long", line);
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			goto bad;
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		}
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		for (ep = list;; ++ep) {
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			if (!ep->prompt) {
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				warnx("unrecognized field on line %u", line);
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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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					warnx(
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					    "you may not change the %s field",
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						ep->prompt);
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					goto bad;
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				}
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				if (!(p = strchr(buf, ':'))) {
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					warnx("line %u corrupted", line);
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					goto bad;
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				}
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				while (isspace((unsigned char)*++p))
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					;
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				for (q = p; isprint((unsigned char)*q); q++) {
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					if (ep->except && strchr(ep->except,*q))
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						break;
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				}
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				if (*q) {
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					warnx(
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				   "illegal character in the \"%s\" field",
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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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	if (list[E_NAME].save == NULL)
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		list[E_NAME].save = "";
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	if (list[E_BPHONE].save == NULL)
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		list[E_BPHONE].save = "";
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	if (list[E_HPHONE].save == NULL)
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		list[E_HPHONE].save = "";
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	if (list[E_LOCATE].save == NULL)
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		list[E_LOCATE].save = "";
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	/* Build the gecos field. */
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	for (alen = 0, p = list[E_NAME].save; *p; p++)
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		if (*p == '&')
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			alen = alen + strlen(pw->pw_name) - 1;
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	if (asprintf(&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) == -1)
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		err(1, NULL);
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	pw->pw_gecos = p;
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	if (snprintf(buf, sizeof(buf),
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	    "%s:%s:%u:%u:%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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	    (long)pw->pw_change, (long)pw->pw_expire, pw->pw_gecos, pw->pw_dir,
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	    pw->pw_shell) >= 1023 ||
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	    strlen(buf) + alen >= 1023) {
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		warnx("entries too long");
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		free(p);
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		return (0);
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	}
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	free(p);
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	return (pw_scan(buf, pw, NULL));
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}