improved random seed to be less predictable

.github/workflows/create_package_on_release.yml

@@ -0,0 +1,22 @@
+name: create package on release
+
+on:
+    release:
+        types: [created]
+
+jobs:
+    build_package_and_release:
+        runs-on: ubuntu-latest
+
+        steps:
+            - uses: actions/checkout@v4
+
+            - name: create deb package
+              run: dpkg-deb --build ./package
+
+            - name: upload release assets
+              uses: softprops/action-gh-release@v2
+              with:
+                tag_name: ${{github.event.release.tag_name}}
+                files: "${{github.workspace}}/builds/*"
+

src/main.c

@@ -1,18 +1,12 @@
-#include <stdio.h>
 #include <time.h>
+#include <stdio.h>
 #include <stdlib.h>
+#include <stdint.h>
 
 int main(void) {
-    srand(time(NULL)); // set the random seed to the system time
-    char* result = NULL;
-
-    if (rand() & (~1) != 0) {
-        result = "heads";
-    }
-    else {
-        result = "tails";
-    }
-
-    printf("%s\n", result);
+    struct timespec ts;
+    clock_gettime(CLOCK_MONOTONIC, &ts);
+    srand((uint32_t)(ts.tv_nsec ^ ts.tv_sec));  // combine seconds and nanoseconds
+    printf("%s\n", (rand() & 1) ? "heads" : "tails");
     return 0;
 }