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/*
* Copyright (C) 2009-2010 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
* Authors: David Zeuthen <davidz@redhat.com>,
* Andrew Psaltis <ampsaltis@gmail.com>
*/
#include "config.h"
#include "polkitagenthelperprivate.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#ifndef HAVE_CLEARENV
extern char **environ;
int
_polkit_clearenv (void)
{
if (environ != NULL)
environ[0] = NULL;
return 0;
}
#else
int
_polkit_clearenv (void)
{
return clearenv ();
}
#endif
char *
read_cookie (int argc, char **argv)
{
/* As part of CVE-2015-4625, we started passing the cookie
* on standard input, to ensure it's not visible to other
* processes. However, to ensure that things continue
* to work if the setuid binary is upgraded while old
* agents are still running (this will be common with
* package managers), we support both modes.
*/
if (argc == 3)
return strdup (argv[2]);
else
{
char *ret = NULL;
size_t n = 0;
ssize_t r = getline (&ret, &n, stdin);
if (r == -1)
{
if (!feof (stdin))
perror ("getline");
free (ret);
return NULL;
}
else
{
g_strchomp (ret);
return ret;
}
}
}
gboolean
send_dbus_message (const char *cookie, const char *user)
{
PolkitAuthority *authority = NULL;
PolkitIdentity *identity = NULL;
GError *error;
gboolean ret;
ret = FALSE;
g_type_init ();
error = NULL;
authority = polkit_authority_get_sync (NULL /* GCancellable* */, &error);
if (authority == NULL)
{
g_printerr ("Error getting authority: %s\n", error->message);
g_error_free (error);
goto out;
}
identity = polkit_unix_user_new_for_name (user, &error);
if (identity == NULL)
{
g_printerr ("Error constructing identity: %s\n", error->message);
g_error_free (error);
goto out;
}
if (!polkit_authority_authentication_agent_response_sync (authority,
cookie,
identity,
NULL,
&error))
{
g_printerr ("polkit-agent-helper-1: error response to PolicyKit daemon: %s\n", error->message);
g_error_free (error);
goto out;
}
ret = TRUE;
out:
if (identity != NULL)
g_object_unref (identity);
if (authority != NULL)
g_object_unref (authority);
return ret;
}
void
flush_and_wait ()
{
fflush (stdout);
fflush (stderr);
#ifdef HAVE_FDATASYNC
fdatasync (fileno(stdout));
fdatasync (fileno(stderr));
#else
fsync (fileno(stdout));
fsync (fileno(stderr));
#endif
usleep (100 * 1000);
}
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