/*--------------------------------------------------------------------*/
/* testfork.c                                                         */
/* Author: Bob Dondero                                                */
/*--------------------------------------------------------------------*/

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>

/*--------------------------------------------------------------------*/

/* Demonstrate the system-level fork() function and the
   standard C fflush() function. Return 0.
   As usual, argc is the command-line argument count, and argv
   contains the command-line arguments. */

int main(int argc, char *argv[])
{
   pid_t iPid;
   int iRet;

   printf("%d parent\n", (int)getpid());

   iRet = fflush(stdin);
   if (iRet == EOF) {perror(argv[0]); exit(EXIT_FAILURE); }
   iRet = fflush(stdout);
   if (iRet == EOF) {perror(argv[0]); exit(EXIT_FAILURE); }
   
   iPid = fork();
   if (iPid == -1) {perror(argv[0]); exit(EXIT_FAILURE); }

   printf("%d parent and child\n", (int)getpid());

   return 0;
}

/*--------------------------------------------------------------------*/

/* Sample executions:

$ gcc217 testfork.c -o testfork

$ ./testfork
29285 parent
29285 parent and child
29286 parent and child

$ ./testfork
29287 parent
29287 parent and child
29288 parent and child

*/