programme en C sur les pipes

#include<stdio.h> #include<unistd.h> #define VALUE 100 void output(int p[2]); void numbers(int p[2]); int main(void) { int channel[2]; pipe (channel1); if (fork() == 0) { numbers(channel1); } if (fork() == 0) { output(channel1); } while (wait((int *)0) >= 0); } void output (int p[2]) { long int num; while(1) { alarm(1); read(p[0]); alarm(0); printf("the number read from the pipe is %d\n", num); } } void numbers(int p[2]) { long time int num; int i=0; srandom((unsigned int) getpid()); while(i < 25) { num=random(); if (num % value == 0) { write(p[1], &num, sizeof(int)); } } }

Code:

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#include<stdio.h>
#include<unistd.h>

#define VALUE 100

void output(int p[2]);
void numbers(int p[2]);

int main(void)
{
   int channel[2];
   pipe (channel1);/*channel1[0]->lecture,channel1[1]->ecriture*/

   if (fork() == 0)
   {/*execution dans le fils */
      numbers(channel1);
   }

   if (fork() == 0)
   {/*execution dans le fils*/
      output(channel1);	
   }
   while (wait((int *)0) >= 0);
}

void output (int p[2])
{
   long int num;

   while(1)
   {
      alarm(1);
      read(p[0],&num,sizeof(int));/*on les recoit*/
      alarm(0);
      printf("the number read from the pipe is %d\n", num);
   }
}

void numbers(int p[2])
{
   long time int num;
   int i=0;

   srandom((unsigned int) getpid());/*on n'initialise avec le pid du fils*/

   while(i < 25)
   {
      num=random();
      if (num % value == 0)
      {	
         write(p[1], &num, sizeof(int));/*on balance des nombres aléatoire pair dans le pipe*/
      }
   }
}