mirror of
https://github.com/SELinuxProject/selinux
synced 2024-12-11 16:44:59 +00:00
5fc701fe11
On most distributions, /var/run is a symbolic link to /run so using /var/run or /run lead to the same result. Nevertheless systemd started to warn about using /var/run in a service file, logging entries such as: /usr/lib/systemd/system/restorecond.service:8: PIDFile= references path below legacy directory /var/run/, updating /var/run/restorecond.pid → /run/restorecond.pid; please update the unit file accordingly. Switch to /run in order to follow this advice. Signed-off-by: Nicolas Iooss <nicolas.iooss@m4x.org>
120 lines
2.7 KiB
C
120 lines
2.7 KiB
C
/*
|
|
* utmpwatcher.c
|
|
*
|
|
* Copyright (C) 2006 Red Hat
|
|
* see file 'COPYING' for use and warranty information
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
.*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
* 02111-1307 USA
|
|
*
|
|
* Authors:
|
|
* Dan Walsh <dwalsh@redhat.com>
|
|
*
|
|
*
|
|
*/
|
|
|
|
#define _GNU_SOURCE
|
|
#include <sys/inotify.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <syslog.h>
|
|
|
|
#include <limits.h>
|
|
#include <utmp.h>
|
|
#include <sys/types.h>
|
|
#include <pwd.h>
|
|
#include "restorecond.h"
|
|
#include "utmpwatcher.h"
|
|
#include "stringslist.h"
|
|
|
|
static struct stringsList *utmp_ptr = NULL;
|
|
static int utmp_wd = -1;
|
|
|
|
unsigned int utmpwatcher_handle(int inotify_fd, int wd)
|
|
{
|
|
int changed = 0;
|
|
struct utmp u;
|
|
const char *utmp_path = "/run/utmp";
|
|
struct stringsList *prev_utmp_ptr = utmp_ptr;
|
|
if (wd != utmp_wd)
|
|
return -1;
|
|
|
|
utmp_ptr = NULL;
|
|
FILE *cfg = fopen(utmp_path, "r");
|
|
if (!cfg)
|
|
exitApp("Error reading utmp file.");
|
|
|
|
while (fread(&u, sizeof(struct utmp), 1, cfg) > 0) {
|
|
if (u.ut_type == USER_PROCESS)
|
|
strings_list_add(&utmp_ptr, u.ut_user);
|
|
}
|
|
fclose(cfg);
|
|
if (utmp_wd >= 0)
|
|
inotify_rm_watch(inotify_fd, utmp_wd);
|
|
|
|
utmp_wd =
|
|
inotify_add_watch(inotify_fd, utmp_path, IN_MOVED_FROM | IN_MODIFY);
|
|
if (utmp_wd == -1)
|
|
exitApp("Error watching utmp file.");
|
|
|
|
changed = strings_list_diff(prev_utmp_ptr, utmp_ptr);
|
|
if (prev_utmp_ptr) {
|
|
strings_list_free(prev_utmp_ptr);
|
|
}
|
|
return changed;
|
|
}
|
|
|
|
static void watch_file(int inotify_fd, const char *file)
|
|
{
|
|
struct stringsList *ptr = utmp_ptr;
|
|
|
|
while (ptr) {
|
|
struct passwd *pwd = getpwnam(ptr->string);
|
|
if (pwd) {
|
|
char *path = NULL;
|
|
if (asprintf(&path, "%s%s", pwd->pw_dir, file) < 0)
|
|
exitApp("Error allocating memory.");
|
|
watch_list_add(inotify_fd, path);
|
|
free(path);
|
|
}
|
|
ptr = ptr->next;
|
|
}
|
|
}
|
|
|
|
void utmpwatcher_add(int inotify_fd, const char *path)
|
|
{
|
|
if (utmp_ptr == NULL) {
|
|
utmpwatcher_handle(inotify_fd, utmp_wd);
|
|
}
|
|
watch_file(inotify_fd, path);
|
|
}
|
|
|
|
void utmpwatcher_free(void)
|
|
{
|
|
if (utmp_ptr)
|
|
strings_list_free(utmp_ptr);
|
|
}
|
|
|
|
#ifdef TEST
|
|
int main(int argc, char **argv)
|
|
{
|
|
read_utmp();
|
|
return 0;
|
|
}
|
|
#endif
|