add: assigment 2

assignment2/part3/consumer.c

@@ -0,0 +1,88 @@
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <getopt.h>
+#include <time.h>
+
+volatile sig_atomic_t shutdown_flag = 0;
+volatile sig_atomic_t stats_flag = 0;
+
+void handle_sigint(int sig) {
+  shutdown_flag = 1;
+}
+
+void handle_sigusr1(int sig) {
+  stats_flag = 1;
+}
+
+int main(int argc, char *argv[]) {
+  struct sigaction sa_sigint;
+  sa_sigint.sa_handler = handle_sigint;
+  sigemptyset(&sa_sigint.sa_mask);
+  sa_sigint.sa_flags = 0;
+  sigaction(SIGINT, &sa_sigint, NULL);
+
+  struct sigaction sa_sigusr1;
+  sa_sigusr1.sa_handler = handle_sigusr1;
+  sigemptyset(&sa_sigusr1.sa_mask);
+  sa_sigusr1.sa_flags = 0;
+  sigaction(SIGUSR1, &sa_sigusr1, NULL);
+
+  int max_lines = -1; // -1 means unlimited
+  int verbose = 0;
+
+  // Parse arguments (-n max_lines, -v verbose)
+  char opt;
+  while ((opt = getopt(argc, argv, "n:v")) != -1) {
+    switch (opt) {
+    case 'n':
+      max_lines = atoi(optarg); break;
+    case 'v':
+      verbose = 1; break;
+    default:
+      printf("Usage: %s [-n max_lines] [-v]\n", argv[0]);
+      return 1;
+    }
+  }
+
+  clock_t start = clock();
+
+  // Read from stdin line by line
+  // Count lines and characters
+  // If verbose, echo lines to stdout
+  char buffer[256];
+  int lines = 0;
+  int chars = 0;
+  while (fgets(buffer, sizeof(buffer), stdin) != NULL) {
+    int size = strlen(buffer);
+    if (verbose)
+      fwrite(buffer, sizeof(char), size, stdout);
+    chars += size;
+    if (size > 0 && buffer[size - 1] == '\n')
+      lines++;
+    if (lines == max_lines)
+      break;
+
+    // Handle shutdown
+    if (shutdown_flag) {
+      fprintf(stderr, "Cancelled\n");
+      return 1;
+    }
+  }
+
+  // Print statistics to stderr (handle SIGUSR1)
+  if (stats_flag) {
+    clock_t end = clock();
+    double time = ((double)(end - start)) / CLOCKS_PER_SEC;
+    double throughput = (double)chars / 1024.0 / 1024.0 / time;
+    printf("Stats:\n");
+    printf("File Size: %d bytes\n", chars);
+    printf("Total Time: %.3f secs\n", time);
+    printf("Throughput: %.3f MB/s\n", throughput);
+  }
+  fprintf(stderr, "Lines: %d\n", lines);
+
+  return 0;
+}

assignment2/part3/producer.c

@@ -0,0 +1,63 @@
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <getopt.h>
+
+volatile sig_atomic_t shutdown_flag = 0;
+
+void handle_sigint(int sig) {
+  shutdown_flag = 1;
+}
+
+int main(int argc, char *argv[]) {
+  struct sigaction sa;
+  sa.sa_handler = handle_sigint;
+  sigemptyset(&sa.sa_mask);
+  sa.sa_flags = 0;
+  sigaction(SIGINT, &sa, NULL);
+
+  FILE *input = stdin;
+  int buffer_size = 4096;
+
+  // Parse command line arguments
+  // -f filename (optional)
+  // b buffer_size (optional)
+  char opt;
+  while ((opt = getopt(argc, argv, "f:b:")) != -1) {
+    switch (opt) {
+    case 'f':
+      input = fopen(optarg, "r");
+      if (input == NULL) {
+        fprintf(stderr, "Error: Could not open input file\n");
+        return EXIT_FAILURE;
+      }
+      break;
+    case 'b':
+      buffer_size = atoi(optarg); break;
+    default:
+      printf("Usage: %s [-f filename] [-b buffer_size]\n", argv[0]);
+      return 1;
+    }
+  }
+
+  // Allocate buffer
+  char *buffer = malloc(buffer_size);
+
+  // Read from input and write to stdout
+  while (fgets(buffer, buffer_size, input) != NULL) {
+    fwrite(buffer, sizeof(char), strlen(buffer), stdout);
+
+    // Handle shutdown
+    if (shutdown_flag) {
+      fprintf(stderr, "Cancelled\n");
+      return 1;
+    }
+  }
+
+  // Cleanup
+  free(buffer);
+
+  return 0;
+}

assignment2/part3/test

@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+
+echo "Building executables..."
+
+cd "${FLAKE:-$(dirname $0)}"
+if command -v nix; then
+    producer="$(nix build --no-link --print-out-paths .#a2-p3-producer)/bin/producer"
+    consumer="$(nix build --no-link --print-out-paths .#a2-p3-consumer)/bin/consumer"
+else
+    gcc producer.c -o producer
+    gcc consumer.c -o consumer
+    producer="./producer"
+    consumer="./consumer"
+fi
+
+seq 1 10000000 >large.txt
+
+echo -e "\nTEST - Buffer size 1024"
+"$producer" -b 1024 -f large.txt | "$consumer" &
+kill -USR1 "$(pidof consumer)"
+wait "$(jobs -rp)"
+
+echo -e "\nTEST - Buffer size 4096"
+"$producer" -b 4096 -f large.txt | "$consumer" &
+kill -USR1 "$(pidof consumer)"
+wait "$(jobs -rp)"
+
+echo -e "\nTEST - Buffer size 16384"
+"$producer" -b 16384 -f large.txt | "$consumer" &
+kill -USR1 "$(pidof consumer)"
+wait "$(jobs -rp)"
+
+rm large.txt