Detect multiple instances of gsr-ui by detecting virtual keyboard presence instead. This works in flatpak

1 files changed, 27 insertions, 2 deletions

diff --git a/src/main.cpp b/src/main.cpp
index 3abccd0..ae08bb8 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -133,6 +133,24 @@ static std::unique_ptr<gsr::GlobalHotkeysLinux> register_linux_hotkeys(gsr::Over
     return global_hotkeys;
 }
 
+static bool is_gsr_ui_virtual_keyboard_running() {
+    FILE *f = fopen("/proc/bus/input/devices", "rb");
+    if(!f)
+        return false;
+
+    bool virtual_keyboard_running = false;
+    char line[1024];
+    while(fgets(line, sizeof(line), f)) {
+        if(strstr(line, "gsr-ui virtual keyboard")) {
+            virtual_keyboard_running = true;
+            break;
+        }
+    }
+
+    fclose(f);
+    return virtual_keyboard_running;
+}
+
 static void usage() {
     printf("usage: gsr-ui [action]\n");
     printf("OPTIONS:\n");
@@ -171,12 +189,19 @@ int main(int argc, char **argv) {
         usage();
     }
 
-    const pid_t gsr_ui_pid = gsr::pidof("gsr-ui");
-    if(gsr_ui_pid != -1) {
+    // TODO: This is a shitty method to detect if multiple instances of gsr-ui is running but this will work properly even in flatpak
+    // that uses pid sandboxing. Replace this with a better method once we no longer rely on linux global hotkeys on some platform.
+    if(is_gsr_ui_virtual_keyboard_running()) {
         const char *args[] = { "gsr-notify", "--text", "Another instance of GPU Screen Recorder UI is already running", "--timeout", "5.0", "--icon-color", "ff0000", "--bg-color", "ff0000", nullptr };
         gsr::exec_program_daemonized(args);
         return 1;
     }
+    // const pid_t gsr_ui_pid = gsr::pidof("gsr-ui");
+    // if(gsr_ui_pid != -1) {
+    //     const char *args[] = { "gsr-notify", "--text", "Another instance of GPU Screen Recorder UI is already running", "--timeout", "5.0", "--icon-color", "ff0000", "--bg-color", "ff0000", nullptr };
+    //     gsr::exec_program_daemonized(args);
+    //     return 1;
+    // }
 
     // Cant get window texture when prime-run is used
     disable_prime_run();