From 95ce901489df683e9d1a4e6e210d3e2f97931063 Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Sat, 22 Feb 2025 16:17:31 +0100
Subject: Remove local share gpu screen recorder directory before install

---
 main.c | 61 +++++++++++++++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 53 insertions(+), 8 deletions(-)

diff --git a/main.c b/main.c
index 907333c..2114ca1 100644
--- a/main.c
+++ b/main.c
@@ -6,6 +6,7 @@
 #include <errno.h>
 #include <fcntl.h>
 #include <stdbool.h>
+#include <dirent.h>
 #include <sys/stat.h>
 #include <sys/sendfile.h>
 #include <sys/capability.h>
@@ -72,9 +73,16 @@ static bool create_local_kms_server_proxy_directory(const char *home) {
     for(size_t i = 0; paths[i]; ++i) {
         const char *path_part = paths[i];
         snprintf(path, sizeof(path), "%s/%s", home, path_part);
-        err = mkdir(path, S_IRWXU);
-        if(err == -1 && errno != EEXIST)
-            return false;
+        err = mkdir(path, 0755);
+        if(err == -1) {
+            if(errno == EEXIST) {
+                err = chmod(path, 0755);
+                if(err == -1)
+                    return false;
+            } else {
+                return false;
+            }
+        }
     }
 
     return true;
@@ -150,8 +158,43 @@ static bool set_gsr_files_set_permissions_and_capabilities(const char *kms_serve
     return true;
 }
 
+/* This works even if the files require root access to modify, since we are just unlinking, not modifying them */
+static bool remove_directory_recursive(const char *filepath) {
+    DIR *dir = opendir(filepath);
+    if(!dir)
+        return false;
+
+    char file[PATH_MAX];
+    struct dirent *entry;
+    while((entry = readdir(dir)) != NULL) {
+        if(strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0)
+            continue;
+
+        snprintf(file, sizeof(file), "%s/%s", filepath, entry->d_name);
+        struct stat st;
+        if(stat(file, &st) == -1)
+            continue;
+
+        if(S_ISDIR(st.st_mode)) {
+            if(!remove_directory_recursive(file))
+                return false;
+        }
+
+        if(remove(file) != 0)
+            return false;
+    }
+
+    return true;
+}
+
+static bool remove_local_gsr_files(const char *user_homepath) {
+    char gsr_dir_local_filepath[PATH_MAX];
+    snprintf(gsr_dir_local_filepath, sizeof(gsr_dir_local_filepath), "%s/.local/share/gpu-screen-recorder", user_homepath);
+    return remove_directory_recursive(gsr_dir_local_filepath);
+}
+
 /* |gsr_global_hotkeys_local_filepath| can be NULL */
-static bool setup_local_files(const char *user_homepath, const char *kms_server_proxy_local_filepath, const char *gsr_kms_server_local_filepath, const char *gsr_global_hotkeys_local_filepath) {
+static bool setup_local_gsr_files(const char *user_homepath, const char *kms_server_proxy_local_filepath, const char *gsr_kms_server_local_filepath, const char *gsr_global_hotkeys_local_filepath) {
     if(!create_local_kms_server_proxy_directory(user_homepath)) {
         fprintf(stderr, "Error: failed to create ~/.local/share/gpu-screen-recorder directory\n");
         return false;
@@ -206,7 +249,8 @@ static int setup_gsr_ui(const char *user_homepath) {
 
         return 0;
     } else {
-        if(!setup_local_files(user_homepath, kms_server_proxy_local_filepath, gsr_kms_server_local_filepath, gsr_global_hotkeys_local_filepath))
+        remove_local_gsr_files(user_homepath);
+        if(!setup_local_gsr_files(user_homepath, kms_server_proxy_local_filepath, gsr_kms_server_local_filepath, gsr_global_hotkeys_local_filepath))
             return 1;
 
         const char *args[] = { "pkexec", kms_server_proxy_local_filepath, "setup-gsr-ui", user_homepath, NULL };
@@ -254,7 +298,8 @@ static int launch_gsr_kms_server(const char *initial_socket_path, const char *ca
         const char *args[] = { gsr_kms_server_local_filepath, initial_socket_path, card_path, NULL };
         return execv(args[0], (char *const*)args);
     } else {
-        if(!setup_local_files(user_homepath, kms_server_proxy_local_filepath, gsr_kms_server_local_filepath, NULL))
+        remove_local_gsr_files(user_homepath);
+        if(!setup_local_gsr_files(user_homepath, kms_server_proxy_local_filepath, gsr_kms_server_local_filepath, NULL))
             return 1;
 
         const char *args[] = { "pkexec", kms_server_proxy_local_filepath, initial_socket_path, card_path, user_homepath, NULL };
@@ -305,9 +350,9 @@ static int launch_gsr_global_hotkeys(char **argv) {
     }
 
     argv[2] = gsr_global_hotkeys_local_filepath;
-    int d = execv(argv[2], argv + 2);
+    const int result = execv(argv[2], argv + 2);
     perror(argv[2]);
-    return d;
+    return result;
 }
 
 int main(int argc, char **argv) {
-- 
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