From 1e8c184d8e70e87028ed8604a78a1b77c83ae35e Mon Sep 17 00:00:00 2001
From: Peter Hutterer <peter.hutterer@who-t.net>
Date: Thu, 26 Aug 2021 12:32:28 +1000
Subject: [PATCH] tools: set the default properties in the fake portal

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
---
 meson.build             |  2 +-
 tools/eis-fake-portal.c | 50 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 51 insertions(+), 1 deletion(-)

diff --git a/meson.build b/meson.build
index 6a45f33..0672122 100644
--- a/meson.build
+++ b/meson.build
@@ -185,7 +185,7 @@ if get_option('portal')
     executable('eis-fake-portal',
                'tools/eis-fake-portal.c',
                include_directories: 'src',
-               dependencies: [dep_libutil, dep_systemd])
+               dependencies: [dep_libutil, dep_systemd, dep_libreis])
 endif
 
 # tests
diff --git a/tools/eis-fake-portal.c b/tools/eis-fake-portal.c
index 2c23a5e..7c62811 100644
--- a/tools/eis-fake-portal.c
+++ b/tools/eis-fake-portal.c
@@ -24,16 +24,22 @@
 #include "config.h"
 
 #include <errno.h>
+#include <fcntl.h>
 #include <getopt.h>
 #include <stdbool.h>
+#include <unistd.h>
 
 #include "util-io.h"
 #include "util-mem.h"
 #include "util-logger.h"
 #include "util-strings.h"
 
+#include "libreis.h"
+
 #include <systemd/sd-bus.h>
 
+DEFINE_UNREF_CLEANUP_FUNC(reis);
+
 struct portal {
 	struct logger *logger;
 	char *busname;
@@ -133,6 +139,39 @@ portal_emulate_input(sd_bus_message *m, void *userdata,
 	return create_request_object(portal, sd_bus_message_get_bus(m), objpath);
 }
 
+static void
+set_prop_cmdline(struct reis *reis)
+{
+	char path[PATH_MAX];
+
+	xsnprintf(path, sizeof(path), "/proc/%u/cmdline", getpid());
+	_cleanup_close_ int fd = open(path, O_RDONLY);
+	if (fd < 0)
+		return;
+
+	int len;
+	if ((len = read(fd, path, sizeof(path) - 1)) < 0)
+		return;
+	path[len] = '\0';
+
+	reis_set_property_with_permissions(reis, "ei.application.cmdline", path, REIS_PROPERTY_PERM_NONE);
+}
+
+static void
+set_prop_pid(struct reis *reis)
+{
+	char pid[64];
+
+	xsnprintf(pid, sizeof(pid), "%u", getpid());
+	reis_set_property_with_permissions(reis, "ei.application.pid", pid, REIS_PROPERTY_PERM_NONE);
+}
+
+static void
+set_prop_type(struct reis *reis)
+{
+	reis_set_property_with_permissions(reis, "ei.connection.type", "portal", REIS_PROPERTY_PERM_NONE);
+}
+
 static int
 portal_connect(sd_bus_message *m, void *userdata,
 	       sd_bus_error *ret_error)
@@ -145,6 +184,17 @@ portal_connect(sd_bus_message *m, void *userdata,
 
 	_cleanup_free_ char *sockpath = xaprintf("%s/eis-0", xdg);
 	int handle = xconnect(sockpath);
+	if (handle < 0) {
+		log_error(portal, "Failed to connect to EIS (%s)\n", strerror(-handle));
+		abort();
+	}
+
+	_unref_(reis) *reis = reis_new(handle);
+	assert(reis);
+	set_prop_pid(reis);
+	set_prop_cmdline(reis);
+	set_prop_type(reis);
+
 	log_debug(portal, "passing Handle %d\n", handle);
 	return sd_bus_reply_method_return(m, "h", handle);
 }