pa-04

pa-06/a1/a.c

@@ -0,0 +1,6 @@
+#include <stdio.h>
+#include <unistd.h>
+int main(void) {
+    printf("Guten Tag %d\n", fork());
+    return 0;
+}

pa-06/a1/b.c

@@ -0,0 +1,6 @@
+#include <stdio.h>
+#include <unistd.h>
+int main(void) {
+    printf("Guten %d Tag %d\n", fork(), fork());
+    return 0;
+}

pa-06/a1/c.c

@@ -0,0 +1,7 @@
+#include <stdio.h>
+#include <unistd.h>
+int main(void) {
+    printf("Guten %d\n", fork());
+    printf("Tag %d\n", fork());
+    return 0;
+}

pa-06/a1/d.c

@@ -0,0 +1,21 @@
+#include <stdio.h>
+#include <unistd.h>
+int main(void) {
+    int v1 = 0, v2 = 0, v3 = 0, pid;
+    pid = getpid();
+    v2++;
+    if (fork()) {
+        v1++;
+        v2++;
+        sleep(1);
+        if (fork()) {
+            v1++;
+            sleep(1);
+        }
+    }
+    if (pid == getppid()) {
+        v3++;
+    }
+    printf("%d %d %d\n", v1, v2, v3);
+    return 0;
+}

pa-06/a1/flake.lock

@@ -0,0 +1,61 @@
+{
+  "nodes": {
+    "flake-parts": {
+      "inputs": {
+        "nixpkgs-lib": "nixpkgs-lib"
+      },
+      "locked": {
+        "lastModified": 1763759067,
+        "narHash": "sha256-LlLt2Jo/gMNYAwOgdRQBrsRoOz7BPRkzvNaI/fzXi2Q=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "2cccadc7357c0ba201788ae99c4dfa90728ef5e0",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1763835633,
+        "narHash": "sha256-HzxeGVID5MChuCPESuC0dlQL1/scDKu+MmzoVBJxulM=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "050e09e091117c3d7328c7b2b7b577492c43c134",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-lib": {
+      "locked": {
+        "lastModified": 1761765539,
+        "narHash": "sha256-b0yj6kfvO8ApcSE+QmA6mUfu8IYG6/uU28OFn4PaC8M=",
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "rev": "719359f4562934ae99f5443f20aa06c2ffff91fc",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-parts": "flake-parts",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

pa-06/a1/flake.nix

@@ -0,0 +1,60 @@
+{
+  description = "Description for the project";
+
+  inputs = {
+    flake-parts.url = "github:hercules-ci/flake-parts";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+  };
+
+  outputs = inputs @ {flake-parts, ...}:
+    flake-parts.lib.mkFlake {inherit inputs;} {
+      imports = [
+        # To import an internal flake module: ./other.nix
+        # To import an external flake module:
+        #   1. Add foo to inputs
+        #   2. Add foo as a parameter to the outputs function
+        #   3. Add here: foo.flakeModule
+      ];
+      systems = ["x86_64-linux" "aarch64-linux" "aarch64-darwin" "x86_64-darwin"];
+      perSystem = {
+        config,
+        self',
+        inputs',
+        pkgs,
+        system,
+        ...
+      }: let
+        mkTask = part:
+          pkgs.stdenv.mkDerivation {
+            name = "a1-${part}";
+            src = ./.;
+            buildPhase = ''
+              cc ${part}.c -o ${part}.out
+            '';
+            installPhase = ''
+              mkdir -p $out/bin/
+              mv ${part}.out $out/bin/
+            '';
+            meta = {
+              mainProgram = "${part}.out";
+            };
+          };
+      in {
+        # Per-system attributes can be defined here. The self' and inputs'
+        # module parameters provide easy access to attributes of the same
+        # system.
+
+        packages = {
+          a = mkTask "a";
+          b = mkTask "b";
+          c = mkTask "c";
+          d = mkTask "d";
+        };
+      };
+      flake = {
+        # The usual flake attributes can be defined here, including system-
+        # agnostic ones like nixosModule and system-enumerating ones, although
+        # those are more easily expressed in perSystem.
+      };
+    };
+}