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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 - 2010 Red Hat, Inc.
*/
#include <config.h>
#include <string.h>
#include "nm-policy-hosts.h"
#include "nm-logging.h"
#define ADDED_TAG "# Added by NetworkManager"
GString *
nm_policy_get_etc_hosts (const char *contents, gsize contents_len)
{
char **lines = NULL, **iter;
GString *new_contents = NULL;
if (contents_len == 0 || !strstr (contents, ADDED_TAG))
return NULL;
new_contents = g_string_sized_new (contents_len);
/* Remove "# Added ..." lines */
lines = g_strsplit_set (contents, "\n\r", -1);
for (iter = lines; iter && *iter; iter++) {
if (!strstr (*iter, ADDED_TAG)) {
g_string_append (new_contents, *iter);
g_string_append_c (new_contents, '\n');
}
}
g_strfreev (lines);
/* Remove last blank line at end of file, if one exists; this is
* an artifact of how g_strsplit_set() works.
*/
if ( (new_contents->len > 2)
&& (new_contents->str[new_contents->len - 1] == '\n'))
g_string_truncate (new_contents, new_contents->len - 1);
return new_contents;
}
/* remove any leftover "# Added by NetworkManager" lines */
void
nm_policy_hosts_clean_etc_hosts (void)
{
char *contents = NULL;
gsize contents_len = 0;
GError *error = NULL;
GString *new;
if (!g_file_get_contents (SYSCONFDIR "/hosts", &contents, &contents_len, &error)) {
nm_log_dbg (LOGD_DNS, "couldn't read " SYSCONFDIR "/hosts: (%d) %s",
error ? error->code : 0,
(error && error->message) ? error->message : "(unknown)");
g_clear_error (&error);
return;
}
new = nm_policy_get_etc_hosts (contents, contents_len);
g_free (contents);
if (new && new->len) {
nm_log_dbg (LOGD_DNS, "Cleaning leftovers from /etc/hosts");
g_clear_error (&error);
if (!g_file_set_contents (SYSCONFDIR "/hosts", new->str, -1, &error)) {
nm_log_dbg (LOGD_DNS, "couldn't update " SYSCONFDIR "/hosts: (%d) %s",
error ? error->code : 0,
(error && error->message) ? error->message : "(unknown)");
g_clear_error (&error);
}
}
if (new)
g_string_free (new, TRUE);
}
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