From c0cfa7dc9752823fe8bcae4c36eff80767a7abf3 Mon Sep 17 00:00:00 2001
From: ae <git@golfed.xyz>
Date: Mon, 14 Oct 2024 21:15:32 +0300
Subject: [PATCH] extra print statements for live demo

---
 init.c      | 15 +++++++++++----
 scheduler.c | 14 +++++++++++++-
 2 files changed, 24 insertions(+), 5 deletions(-)

diff --git a/init.c b/init.c
index 6f7d283..e6fd317 100644
--- a/init.c
+++ b/init.c
@@ -16,13 +16,13 @@ struct shared_data {
 
 void write_pipes(int pipefds[][2], pid_t pids[]) {
   for (int i = 0; i < NUM_PROCS; i++) {
-    // Creation of a pipe (child -> parent)
+    // Create pipe (child -> parent)
     if (pipe(pipefds[i]) == -1) {
       perror("[!] Pipe failed");
       exit(EXIT_FAILURE);
     }
 
-    // Creation of a fork
+    // Create fork
     pids[i] = fork();
 
     if (pids[i] == -1) {
@@ -30,8 +30,11 @@ void write_pipes(int pipefds[][2], pid_t pids[]) {
       exit(EXIT_FAILURE);
     }
 
-    // If the fork is successfully created
+    // Executing inside the child process
     if (pids[i] == 0) {
+      pid_t child_pid = getpid();
+      printf("[P%d] PID: %d\n", i + 1, child_pid);
+
       // Read end of the pipe is closed before writing (sync)
       close(pipefds[i][0]);
 
@@ -44,6 +47,7 @@ void write_pipes(int pipefds[][2], pid_t pids[]) {
       close(pipefds[i][1]);
 
       printf("[P%d] Wrote %d into pipe\n", i + 1, priority);
+      printf("[P%d] Exiting...\n", i + 1);
 
       exit(0);
     }
@@ -94,6 +98,7 @@ void write_mem_segment(int priorities[]) {
   shm_ptr->ready = 1;
 
   printf("[INIT] Wrote priorities to shared memory\n");
+  printf("[INIT] Flipped the signal flag to 1\n");
 
   // Detach
   if (shmdt(shm_ptr) == -1) {
@@ -101,7 +106,7 @@ void write_mem_segment(int priorities[]) {
     exit(EXIT_FAILURE);
   }
 
-  printf("[INIT] Deteached from shared memory\n");
+  printf("[INIT] Detached from shared memory\n");
 }
 
 int main() {
@@ -119,5 +124,7 @@ int main() {
   // Attach and write priorities to a shared memory segment
   write_mem_segment(priorities);
 
+  printf("[INIT] Exiting...\n");
+
   return 0;
 }
diff --git a/scheduler.c b/scheduler.c
index f9da74e..3ce60a6 100644
--- a/scheduler.c
+++ b/scheduler.c
@@ -17,6 +17,8 @@ int create_mem_segment(struct shared_data **shm_ptr) {
   int shmid;
   key_t key = ftok(PATHNAME, PROJ_ID);
 
+  printf("[SCHEDULER] Shared segment key: %d\n", key);
+
   // Create a new shared segment
   if ((shmid = shmget(key, SHM_SIZE, IPC_CREAT | 0666)) < 0) {
     perror("[!] Shmget failed");
@@ -73,11 +75,19 @@ int main() {
   }
 
   printf("[SCHEDULER] Shared memory segment %d detached and deleted\n", shmid);
+  printf("[SCHEDULER] Unsorted priorities: ");
+
+  // Print the priorities before sorting (for comparison)
+  for (int i = 0; i < NUM_PROCS; i++) {
+    printf("%d ", priorities[i]);
+  }
+
+  printf("\n");
 
   // Sort and print the priorities
   qsort(&priorities, NUM_PROCS, sizeof(int), compare);
 
-  printf("[SCHEDULER] Priorities: ");
+  printf("[SCHEDULER] Sorted priorities: ");
 
   for (int i = 0; i < NUM_PROCS; i++) {
     printf("%d ", priorities[i]);
@@ -85,5 +95,7 @@ int main() {
 
   printf("\n");
 
+  printf("[SCHEDULER] Exiting...\n");
+
   return 0;
 }