tkt

SCR3.1/TP3/Exo5/v1.c

@@ -0,0 +1,68 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <time.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+#define SIZE 1000
+
+int search(const unsigned char *t, int start, int end) {
+    int i;
+    for (i = start; i <= end; i++) {
+        if (t[i] == 0) {
+            return 1;
+        }
+    }
+    return 0;
+}
+
+int main(int argc, char *argv[]) {
+    int i;
+    unsigned char arr[SIZE];
+    int pipefd[2];
+    pid_t pid;
+    int found_by_child = 0;
+    int found_by_parent;
+
+    srandom(time(NULL));
+
+    for (i = 0; i < SIZE; i++)
+        arr[i] = (unsigned char)(random() % 255) + 1;
+
+    printf("Entrez un nombre entre 0 et %d: ", SIZE - 1);
+    scanf(" %d", &i);
+    if (i >= 0 && i < SIZE) arr[i] = 0;
+
+    if (pipe(pipefd) == -1) {
+        perror("pipe");
+        exit(EXIT_FAILURE);
+    }
+
+    pid = fork();
+    if (pid == -1) {
+        perror("fork");
+        exit(EXIT_FAILURE);
+    }
+
+    if (pid == 0) { // Processus fils
+        close(pipefd[0]); // Ferme l'entrée du pipe
+        int result = search(arr, SIZE / 2, SIZE - 1);
+        write(pipefd[1], &result, sizeof(result));
+        close(pipefd[1]); // Ferme la sortie du pipe
+        exit(EXIT_SUCCESS);
+    } else { // Processus père
+        close(pipefd[1]); // Ferme la sortie du pipe
+        found_by_parent = search(arr, 0, SIZE / 2 - 1);
+        read(pipefd[0], &found_by_child, sizeof(found_by_child));
+        close(pipefd[0]);
+        wait(NULL);
+
+        if (found_by_parent || found_by_child)
+            printf("Found !\n");
+        else
+            printf("Not found !\n");
+    }
+
+    return EXIT_SUCCESS;
+}