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