1 files changed, 227 insertions, 0 deletions
diff --git a/gs-install-appstream/gs-install-appstream.c b/gs-install-appstream/gs-install-appstream.c
new file mode 100644
index 0000000..fd17584
--- /dev/null
+++ b/gs-install-appstream/gs-install-appstream.c
@@ -0,0 +1,227 @@
+/* -*- 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;
+}