Ca a terminé l'exo 5

SCR3.1/TP3/ex5_v2.c

@@ -10,20 +10,33 @@
 int search(const unsigned char * t,int start,int end, int n)
 {
 	pid_t p;
-	int i, proc, status, partition = ceil((start + end) / n);
+	int i, proc, res = 0, status, partition = ceil((start + end) / n);
 	for (proc = 1; proc <= n;proc++){
 		p = fork();
 		if (p == 0){
-			for (i = 0 + partition * proc
+			for (i = 0 + partition * proc; i < partition * (proc + 1); i++){
+				if (t[i] == 0)
+					exit(1);
+			}
+			exit(0);
 		}
+	}
+	for (i = 0; i < n; i++){
+		wait(&status);
+		if (WEXITSTATUS(status))
+			res = 1;
+	}
+	return res;
 }
 
 int main(int argc , char * argv[])
 {
 	int i, n;
 	unsigned char arr[SIZE];
-	if (argc != 2)
+	if (argc != 2){
 		printf("Usage : %s <nombre de fils à créer entre 1 et 100>", argv[0]);
+		return EXIT_FAILURE;
+	}
 	n = (int) strtod(argv[1], NULL);
 	srandom(time(NULL));
 

SCR3.1/TP3/ex5_v3.c

@@ -0,0 +1,61 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <math.h>
+#include <signal.h>
+
+#define SIZE 1000
+int search(const unsigned char * t,int start,int end, int n)
+{
+	pid_t p;
+	int i, proc, res = 0, status, partition = ceil((start + end) / n);
+	for (proc = 1; proc <= n;proc++){
+		p = fork();
+		if (p == 0){
+			for (i = 0 + partition * proc; i < partition * (proc + 1); i++){
+				if (t[i] == 0){
+					exit(1);
+					kill(0, SIGTERM);
+				}
+			}
+			exit(0);
+		}
+	}
+	for (i = 0; i < n; i++){
+		wait(&status);
+		if (WEXITSTATUS(status))
+			res = 1;
+	}
+	return res;
+}
+
+int main(int argc , char * argv[])
+{
+	int i, n;
+	unsigned char arr[SIZE];
+	if (argc != 2){
+		printf("Usage : %s <nombre de fils à créer entre 1 et 100>\n", argv[0]);
+		return EXIT_FAILURE;
+	}
+
+	n = (int) strtod(argv[1], NULL);
+	srandom(time(NULL));
+
+	for (i = 0; i < SIZE; i++)
+		arr[i] = (unsigned char) (random() % 255) + 1;
+
+	printf("Enter a number between 0 and %d: ", SIZE);
+	scanf(" %d", &i);
+	if (i >= 0 && i < SIZE) arr[i] = 0;
+
+	if (search(arr,0,SIZE-1, n)) 
+		printf("Found !\n");
+	else 
+		printf("Not found !\n");
+	return EXIT_SUCCESS;
+}
+
+