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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* NetworkManager -- Network link manager
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Copyright (C) 2004 - 2012 Red Hat, Inc.
* Copyright (C) 2005 - 2008 Novell, Inc.
*/
#include "config.h"
#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/stat.h>
#include <locale.h>
#include <glib.h>
#include <glib/gi18n.h>
#include <glib-unix.h>
#include <gmodule.h>
#include "main-utils.h"
#include "nm-logging.h"
static gboolean
sighup_handler (gpointer user_data)
{
/* Reread config stuff like system config files, VPN service files, etc */
nm_log_info (LOGD_CORE, "caught SIGHUP, not supported yet.");
return G_SOURCE_CONTINUE;
}
static gboolean
sigint_handler (gpointer user_data)
{
GMainLoop *main_loop = user_data;
nm_log_info (LOGD_CORE, "caught SIGINT, shutting down normally.");
g_main_loop_quit (main_loop);
return G_SOURCE_REMOVE;
}
static gboolean
sigterm_handler (gpointer user_data)
{
GMainLoop *main_loop = user_data;
nm_log_info (LOGD_CORE, "caught SIGTERM, shutting down normally.");
g_main_loop_quit (main_loop);
return G_SOURCE_REMOVE;
}
/**
* nm_main_utils_setup_signals:
* @main_loop: the #GMainLoop to quit when SIGINT or SIGTERM is received
*
* Sets up signal handling for NetworkManager.
*/
void
nm_main_utils_setup_signals (GMainLoop *main_loop)
{
g_return_if_fail (main_loop != NULL);
signal (SIGPIPE, SIG_IGN);
g_unix_signal_add (SIGHUP, sighup_handler, NULL);
g_unix_signal_add (SIGINT, sigint_handler, main_loop);
g_unix_signal_add (SIGTERM, sigterm_handler, main_loop);
}
gboolean
nm_main_utils_write_pidfile (const char *pidfile)
{
char pid[16];
int fd;
gboolean success = FALSE;
if ((fd = open (pidfile, O_CREAT|O_WRONLY|O_TRUNC, 00644)) < 0) {
fprintf (stderr, _("Opening %s failed: %s\n"), pidfile, strerror (errno));
return FALSE;
}
g_snprintf (pid, sizeof (pid), "%d", getpid ());
if (write (fd, pid, strlen (pid)) < 0)
fprintf (stderr, _("Writing to %s failed: %s\n"), pidfile, strerror (errno));
else
success = TRUE;
if (close (fd))
fprintf (stderr, _("Closing %s failed: %s\n"), pidfile, strerror (errno));
return success;
}
/**
* nm_main_utils_check_pidfile:
* @pidfile: the pid file
* @name: the process name
*
* Checks whether the pidfile already exists and contains PID of a running
* process.
*
* Returns: %TRUE if the specified pidfile already exists and contains the PID
* of a running process named @name, or %FALSE if not
*/
gboolean
nm_main_utils_check_pidfile (const char *pidfile, const char *name)
{
char *contents = NULL;
gsize len = 0;
glong pid;
char *proc_cmdline = NULL;
gboolean nm_running = FALSE;
const char *process_name;
/* Setup runtime directory */
if (g_mkdir_with_parents (NMRUNDIR, 0755) != 0) {
nm_log_err (LOGD_CORE, "Cannot create '%s': %s", NMRUNDIR, strerror (errno));
exit (1);
}
if (!g_file_get_contents (pidfile, &contents, &len, NULL))
return FALSE;
if (len <= 0)
goto done;
errno = 0;
pid = strtol (contents, NULL, 10);
if (pid <= 0 || pid > 65536 || errno)
goto done;
g_free (contents);
proc_cmdline = g_strdup_printf ("/proc/%ld/cmdline", pid);
if (!g_file_get_contents (proc_cmdline, &contents, &len, NULL))
goto done;
process_name = strrchr (contents, '/');
if (process_name)
process_name++;
else
process_name = contents;
if (strcmp (process_name, name) == 0) {
/* Check that the process exists */
if (kill (pid, 0) == 0) {
fprintf (stderr, _("%s is already running (pid %ld)\n"), name, pid);
nm_running = TRUE;
}
}
done:
g_free (proc_cmdline);
g_free (contents);
return nm_running;
}
gboolean
nm_main_utils_early_setup (const char *progname,
char **argv[],
int *argc,
GOptionEntry *options,
GOptionEntry *more_options,
const char *summary)
{
GOptionContext *opt_ctx = NULL;
GError *error = NULL;
gboolean success = FALSE;
int i;
/* Make GIO ignore the remote VFS service; otherwise it tries to use the
* session bus to contact the remote service, and NM shouldn't ever be
* talking on the session bus. See rh #588745
*/
setenv ("GIO_USE_VFS", "local", 1);
/*
* Set the umask to 0022, which results in 0666 & ~0022 = 0644.
* Otherwise, if root (or an su'ing user) has a wacky umask, we could
* write out an unreadable resolv.conf.
*/
umask (022);
/* Ensure gettext() gets the right environment (bgo #666516) */
setlocale (LC_ALL, "");
textdomain (GETTEXT_PACKAGE);
if (getuid () != 0) {
fprintf (stderr, _("You must be root to run %s!\n"), progname);
exit (1);
}
for (i = 0; options[i].long_name; i++) {
if (!strcmp (options[i].long_name, "log-level"))
options[i].description = g_strdup_printf (options[i].description, nm_logging_all_levels_to_string ());
else if (!strcmp (options[i].long_name, "log-domains"))
options[i].description = g_strdup_printf (options[i].description, nm_logging_all_domains_to_string ());
}
/* Parse options */
opt_ctx = g_option_context_new (NULL);
g_option_context_set_translation_domain (opt_ctx, GETTEXT_PACKAGE);
g_option_context_set_ignore_unknown_options (opt_ctx, FALSE);
g_option_context_set_help_enabled (opt_ctx, TRUE);
g_option_context_add_main_entries (opt_ctx, options, NULL);
if (more_options)
g_option_context_add_main_entries (opt_ctx, more_options, NULL);
g_option_context_set_summary (opt_ctx, summary);
success = g_option_context_parse (opt_ctx, argc, argv, &error);
if (!success) {
fprintf (stderr, _("%s. Please use --help to see a list of valid options.\n"),
error->message);
g_clear_error (&error);
}
g_option_context_free (opt_ctx);
return success;
}
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