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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (C) 1996
* David L. Nugent. 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.
*
* THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT 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 DAVID L. NUGENT 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 const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#include <pwd.h>
#include <grp.h>
#include <libutil.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <err.h>
#include <unistd.h>
#include "pwupd.h"
static FILE * pwd_fp = NULL;
static int pwd_scanflag;
static const char *pwd_filename;
void
vendpwent(void)
{
if (pwd_fp != NULL) {
fclose(pwd_fp);
pwd_fp = NULL;
}
}
void
vsetpwent(void)
{
vendpwent();
}
static struct passwd *
vnextpwent(char const *nam, uid_t uid, int doclose)
{
struct passwd *pw;
char *line;
size_t linecap;
ssize_t linelen;
pw = NULL;
line = NULL;
linecap = 0;
if (pwd_fp == NULL) {
if (geteuid() == 0) {
pwd_filename = _MASTERPASSWD;
pwd_scanflag = PWSCAN_MASTER;
} else {
pwd_filename = _PASSWD;
pwd_scanflag = 0;
}
pwd_fp = fopen(getpwpath(pwd_filename), "r");
}
if (pwd_fp != NULL) {
while ((linelen = getline(&line, &linecap, pwd_fp)) > 0) {
/* Skip comments and empty lines */
if (*line == '\n' || *line == '#')
continue;
/* trim latest \n */
if (line[linelen - 1 ] == '\n')
line[linelen - 1] = '\0';
pw = pw_scan(line, pwd_scanflag);
if (pw == NULL)
errx(EXIT_FAILURE, "Invalid user entry in '%s':"
" '%s'", getpwpath(pwd_filename), line);
if (uid != (uid_t)-1) {
if (uid == pw->pw_uid)
break;
} else if (nam != NULL) {
if (strcmp(nam, pw->pw_name) == 0)
break;
} else
break;
free(pw);
pw = NULL;
}
if (doclose)
vendpwent();
}
free(line);
return (pw);
}
struct passwd *
vgetpwent(void)
{
return vnextpwent(NULL, -1, 0);
}
struct passwd *
vgetpwuid(uid_t uid)
{
return vnextpwent(NULL, uid, 1);
}
struct passwd *
vgetpwnam(const char * nam)
{
return vnextpwent(nam, -1, 1);
}
static FILE * grp_fp = NULL;
void
vendgrent(void)
{
if (grp_fp != NULL) {
fclose(grp_fp);
grp_fp = NULL;
}
}
void
vsetgrent(void)
{
vendgrent();
}
static struct group *
vnextgrent(char const *nam, gid_t gid, int doclose)
{
struct group *gr;
char *line;
size_t linecap;
ssize_t linelen;
gr = NULL;
line = NULL;
linecap = 0;
if (grp_fp != NULL || (grp_fp = fopen(getgrpath(_GROUP), "r")) != NULL) {
while ((linelen = getline(&line, &linecap, grp_fp)) > 0) {
/* Skip comments and empty lines */
if (*line == '\n' || *line == '#')
continue;
/* trim latest \n */
if (line[linelen - 1 ] == '\n')
line[linelen - 1] = '\0';
gr = gr_scan(line);
if (gr == NULL)
errx(EXIT_FAILURE, "Invalid group entry in '%s':"
" '%s'", getgrpath(_GROUP), line);
if (gid != (gid_t)-1) {
if (gid == gr->gr_gid)
break;
} else if (nam != NULL) {
if (strcmp(nam, gr->gr_name) == 0)
break;
} else
break;
free(gr);
gr = NULL;
}
if (doclose)
vendgrent();
}
free(line);
return (gr);
}
struct group *
vgetgrent(void)
{
return vnextgrent(NULL, -1, 0);
}
struct group *
vgetgrgid(gid_t gid)
{
return vnextgrent(NULL, gid, 1);
}
struct group *
vgetgrnam(const char * nam)
{
return vnextgrent(nam, -1, 1);
}
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