68 lines
1.5 KiB
C
68 lines
1.5 KiB
C
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <time.h>
|
|
#include <sys/types.h>
|
|
#include <sys/wait.h>
|
|
#include <unistd.h>
|
|
#include <math.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 <number of children is between 1 and 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;
|
|
} |