initial commit

Operating Systems/pipewithforks.c

@@ -0,0 +1,57 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+
+int main() {
+    int pipefd[2];
+    int rc = pipe(pipefd);
+
+    if (rc == -1) {
+        perror("pipe() failed!");
+        return EXIT_FAILURE;
+    }
+
+    pid_t pid = fork();
+
+    if (pid == 0) {
+        perror("fork() failed!");
+        return EXIT_FAILURE;
+    }
+
+    if (pid == 0) {
+        // close the read end of the pipe (there's no need to use it in this process)
+        close(pipefd[0]);
+
+        // Write the bytes to the pipe
+        char* toWrite = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+        int bytes_written = write(pipefd[1], toWrite, 26);
+        printf("Child process wrote \"%s\" (%d bytes)\n", toWrite, bytes_written);
+        
+        return EXIT_SUCCESS;
+    }
+    else {
+        // close the write end of the pipe (there's no need to use it in this process)
+        close(pipefd[0]);
+
+        int stat;
+        pid_t cpid = waitpid(pid, &stat, 0);
+
+        printf("child exited with status %d\n", WEXITSTATUS(stat));
+
+        char buffer[20];
+        int bytes_read = read(pipefd[0], buffer, 10);
+
+        // assume the data is char data
+        buffer[bytes_read] = '\0';
+
+        printf("Parent process read \"%s\" (%d bytes)\n", buffer, bytes_read);
+
+        // close the write buffer
+        close(pipefd[1]);
+    }
+
+    return EXIT_SUCCESS;
+}