Create reader_writer_process.c - atharv

reader_writer_process.c

@@ -0,0 +1,66 @@
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+#define BUF_SIZE 512
+
+void process_A() {
+    int fd;
+    char buf[BUF_SIZE];
+
+    fd = open("testfile.txt", O_RDONLY);
+    if (fd < 0) {
+        perror("Error opening file in A");
+        exit(1);
+    }
+
+    read(fd, buf, sizeof(buf)); 
+    printf("Process A First read: %s\n", buf);
+
+    read(fd, buf, sizeof(buf));
+    printf("Process A Second read: %s\n", buf);
+
+    close(fd);
+}
+
+void process_B() {
+    int fd;
+    char buf[BUF_SIZE];
+
+
+    for (int i = 0; i < sizeof(buf); i++) {
+        buf[i] = 'a';
+    }
+
+
+    fd = open("testfile.txt", O_WRONLY | O_CREAT, 0644);
+    if (fd < 0) {
+        perror("Error opening file in B");
+        exit(1);
+    }
+
+
+    write(fd, buf, sizeof(buf));
+    printf("Process B First write done\n");
+
+    write(fd, buf, sizeof(buf));
+    printf("Process B Second write done\n");
+
+    close(fd);
+}
+
+int main() {
+    int pid = fork(); 
+
+    if (pid == 0) {
+        process_A(); 
+    } else if (pid > 0) {
+        process_B(); 
+    } else {
+        perror("Fork failed");
+        exit(1);
+    }
+
+    return 0;
+}