GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/chpass/field.c Lines: 0 94 0.0 %
Date: 2017-11-07 Branches: 0 62 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: field.c,v 1.14 2015/01/16 06:40:06 deraadt Exp $	*/
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/*	$NetBSD: field.c,v 1.3 1995/03/26 04:55:28 glass Exp $	*/
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/*
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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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 *
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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 <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 <limits.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)
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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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	/* XXX - what about truncated names? */
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	if (strcmp(pw->pw_name, p) != 0 && getpwnam(p) != NULL) {
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		warnx("login %s already exists", p);
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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((unsigned char)*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)
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{
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	if (!*p)
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		pw->pw_passwd = "";	/* "NOLOGIN"; */
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	else 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)
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{
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	uid_t id;
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	const char *errstr;
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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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	id = (uid_t)strtonum(p, 0, UID_MAX, &errstr);
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	if (errstr) {
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		warnx("uid is %s", errstr);
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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)
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{
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	struct group *gr;
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	const char *errstr;
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	gid_t id;
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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((unsigned char)*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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	id = (uid_t)strtonum(p, 0, GID_MAX, &errstr);
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	if (errstr) {
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		warnx("gid is %s", errstr);
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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)
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{
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	if (!*p)
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		pw->pw_class = "";
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	else 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)
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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)
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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, ENTRY *ep)
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{
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	if (!*p)
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		ep->save = "";
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	else 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)
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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)
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{
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	char *t;
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	if (!*p) {
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		pw->pw_shell = _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 (uid && pw->pw_shell && !ok_shell(pw->pw_shell, NULL)) {
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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 (!ok_shell(p, &t)) {
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		if (uid) {
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			warnx("%s: non-standard shell", p);
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			return (1);
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		} else
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			t = strdup(p);
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	}
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	if (!(pw->pw_shell = t)) {
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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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}