X-Git-Url: https://git.piment-noir.org/?p=TD_IML.git;a=blobdiff_plain;f=TD1%2Fpart_two%2Fexo.c;fp=TD1%2Fpart_two%2Fexo.c;h=0194d04e47ec22387c9aaa95ce3c5a13079de811;hp=0000000000000000000000000000000000000000;hb=bb3dd2915f58fa911e2d5df37bc2d2327c5c8430;hpb=eb2b442ac78d6d68707b28cc0c33cddcb7280d0f

diff --git a/TD1/part_two/exo.c b/TD1/part_two/exo.c
new file mode 100644
index 0000000..0194d04
--- /dev/null
+++ b/TD1/part_two/exo.c
@@ -0,0 +1,58 @@
+#include <sys/types.h>
+#include <sys/wait.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+void show_proc_pids() {
+    pid_t current_pid = getpid();
+    pid_t parent_pid = getppid();
+
+    printf("[%d] Mon PID: %d\n", current_pid, current_pid);
+    printf("[%d] PID du parent: %d\n", current_pid, parent_pid);
+}
+
+int main() {
+    int pipefd[2];
+    char buf;
+    printf("Courant:\n");
+    show_proc_pids();
+
+    if (pipe(pipefd) == -1) {
+        printf("Pipe creation erreur\n");
+        exit(EXIT_FAILURE);
+    };
+
+    pid_t cpid = fork();
+
+    if (cpid == -1) {
+        printf("Erreur de clonage\n");
+        exit(EXIT_FAILURE);
+    } else if (cpid == 0) {
+        printf("Fils:\n");
+        show_proc_pids();
+        const char* msg = "Coucou papa !";
+        close(pipefd[0]);
+        write(pipefd[1], msg, strlen(msg));
+        close(pipefd[1]);
+        exit(EXIT_SUCCESS);
+    } else {
+        printf("Parent:\n");
+        show_proc_pids();
+        close(pipefd[1]);
+        
+        while (read(pipefd[0], &buf, 1) > 0) {
+            write(STDOUT_FILENO, &buf, 1);
+        }
+                       
+        write(STDOUT_FILENO, "\n", 1);
+        close(pipefd[0]);
+        wait(NULL);
+        exit(EXIT_SUCCESS);
+    }
+    
+    /* unreachable code */
+    return EXIT_SUCCESS;
+}