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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
* vi:set noexpandtab tabstop=8 shiftwidth=8:
*
* Copyright (C) 2009-2016 Richard Hughes <richard@hughsie.com>
*
* Licensed under the GNU General Public License Version 2
*
* 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.
*/
#include "config.h"
#include <errno.h>
#include <locale.h>
#include <pwd.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <unistd.h>
#include <xmlb.h>
#include <glib/gi18n.h>
#include <glib/gstdio.h>
#include "gs-external-appstream-utils.h"
static gboolean
gs_install_appstream_move_file (GFile *file, GError **error)
{
g_autofree gchar *basename = g_file_get_basename (file);
g_autofree gchar *legacy_cachefn = gs_external_appstream_utils_get_legacy_file_cache_path (basename);
g_autofree gchar *cachefn = gs_external_appstream_utils_get_file_cache_path (basename);
g_autoptr(GFile) cachefn_file = g_file_new_for_path (cachefn);
g_autoptr(GFile) cachedir_file = g_file_get_parent (cachefn_file);
GStatBuf stat_buf = { 0 };
/* Try to cleanup the old cache directory, but do not panic, when it fails */
if (g_unlink (legacy_cachefn) == -1) {
int errn = errno;
if (errn != ENOENT)
g_debug ("Failed to unlink '%s': %s", legacy_cachefn, g_strerror (errn));
}
/* make sure the parent directory exists, but if not then create with
* the ownership and permissions of the current process */
if (!g_file_query_exists (cachedir_file, NULL)) {
if (!g_file_make_directory_with_parents (cachedir_file, NULL, error))
return FALSE;
}
/* do the move, overwriting existing files and setting the permissions
* of the current process (so that should be -rw-r--r--) */
if (!g_file_move (file, cachefn_file,
G_FILE_COPY_OVERWRITE |
G_FILE_COPY_NOFOLLOW_SYMLINKS |
G_FILE_COPY_TARGET_DEFAULT_PERMS,
NULL, NULL, NULL, error))
return FALSE;
/* verify it is "-rw-r--r--" and the root owns the file */
if (g_stat (cachefn, &stat_buf) == 0) {
struct passwd *pwd;
mode_t expected_mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
if ((stat_buf.st_mode & expected_mode) != expected_mode &&
g_chmod (cachefn, expected_mode) == -1) {
int errn = errno;
g_debug ("Failed to chmod '%s': %s", cachefn, g_strerror (errn));
}
/* the file should be owned by the root */
pwd = getpwnam ("root");
if (pwd != NULL) {
if (chown (cachefn, pwd->pw_uid, pwd->pw_gid) == -1) {
int errn = errno;
g_debug ("Failed to chown on '%s': %s", cachefn, g_strerror (errn));
}
} else {
int errn = errno;
g_debug ("Failed to get root info: %s", g_strerror (errn));
}
} else {
int errn = errno;
g_debug ("Failed to stat '%s': %s", cachefn, g_strerror (errn));
}
return TRUE;
}
static gboolean
gs_install_appstream_check_content_type (GFile *file, GError **error)
{
const gchar *type;
g_autoptr(GError) error_local = NULL;
g_autoptr(GFileInfo) info = NULL;
g_autoptr(GPtrArray) components = NULL;
g_autoptr(XbBuilder) builder = xb_builder_new ();
g_autoptr(XbBuilderSource) source = xb_builder_source_new ();
g_autoptr(XbSilo) silo = NULL;
/* check is correct type */
info = g_file_query_info (file,
G_FILE_ATTRIBUTE_STANDARD_CONTENT_TYPE,
G_FILE_QUERY_INFO_NONE,
NULL, error);
if (info == NULL)
return FALSE;
type = g_file_info_get_attribute_string (info, G_FILE_ATTRIBUTE_STANDARD_CONTENT_TYPE);
if (g_strcmp0 (type, "application/gzip") != 0 &&
g_strcmp0 (type, "application/xml") != 0) {
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_INVALID_DATA,
"Invalid type %s: ", type);
return FALSE;
}
/* check is an AppStream file */
if (!xb_builder_source_load_file (source, file,
XB_BUILDER_SOURCE_FLAG_NONE,
NULL, &error_local)) {
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_INVALID_DATA,
"Failed to import XML: %s", error_local->message);
return FALSE;
}
xb_builder_import_source (builder, source);
/* No need to change the thread-default main context because the silo
* doesn’t live beyond this function. */
silo = xb_builder_compile (builder,
XB_BUILDER_COMPILE_FLAG_NONE,
NULL, &error_local);
if (silo == NULL) {
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_INVALID_DATA,
"Failed to parse XML: %s", error_local->message);
return FALSE;
}
components = xb_silo_query (silo, "components/component", 0, &error_local);
if (components == NULL) {
if (g_error_matches (error_local, G_IO_ERROR, G_IO_ERROR_NOT_FOUND)) {
g_set_error_literal (error,
G_IO_ERROR,
G_IO_ERROR_INVALID_DATA,
"No applications found in the AppStream XML");
return FALSE;
}
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_INVALID_DATA,
"Failed to query XML: %s", error_local->message);
return FALSE;
}
return TRUE;
}
int
main (int argc, char *argv[])
{
g_autoptr(GError) error = NULL;
g_autoptr(GFile) file = NULL;
g_autoptr(GOptionContext) context = NULL;
/* setup translations */
setlocale (LC_ALL, "");
bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
textdomain (GETTEXT_PACKAGE);
context = g_option_context_new (NULL);
/* TRANSLATORS: tool that is used when moving profiles system-wide */
g_option_context_set_summary (context, _("GNOME Software AppStream system-wide installer"));
if (!g_option_context_parse (context, &argc, &argv, &error)) {
g_print ("%s\n", _("Failed to parse command line arguments"));
return EXIT_FAILURE;
}
/* check input */
if (g_strv_length (argv) != 2) {
/* TRANSLATORS: user did not specify a valid filename */
g_print ("%s\n", _("You need to specify exactly one filename"));
return EXIT_FAILURE;
}
/* check calling process */
if (getuid () != 0 || geteuid () != 0) {
/* TRANSLATORS: only able to install files as root */
g_print ("%s\n", _("This program can only be used by the root user"));
return EXIT_FAILURE;
}
/* check content type for file */
file = g_file_new_for_path (argv[1]);
if (!gs_install_appstream_check_content_type (file, &error)) {
/* TRANSLATORS: error details */
g_print (_("Failed to validate content type: %s"), error->message);
g_print ("\n");
return EXIT_FAILURE;
}
/* Set the umask to ensure it is read-only to all users except root. */
umask (022);
/* do the move */
if (!gs_install_appstream_move_file (file, &error)) {
/* TRANSLATORS: error details */
g_print (_("Failed to move: %s"), error->message);
g_print ("\n");
return EXIT_FAILURE;
}
/* success */
return EXIT_SUCCESS;
}
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