/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/*
 * File: pipepong2.c
 *
 * Description:
 * This test runs in conjunction with the pipeping2 test.
 * The pipeping2 test creates two pipes and passes two
 * pipe fd's to this test.  Then the pipeping2 test writes
 * "ping" to this test and this test writes "pong" back.
 * To run this pair of tests, just invoke pipeping2.
 *
 * Tested areas: process creation, pipes, file descriptor
 * inheritance.
 */

#include "prerror.h"
#include "prio.h"

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#define NUM_ITERATIONS 10

int main(int argc, char** argv) {
  PRFileDesc *pipe_read, *pipe_write;
  PRStatus status;
  char buf[1024];
  PRInt32 nBytes;
  int idx;

  pipe_read = PR_GetInheritedFD("PIPE_READ");
  if (pipe_read == NULL) {
    fprintf(stderr, "PR_GetInheritedFD failed\n");
    exit(1);
  }
  status = PR_SetFDInheritable(pipe_read, PR_FALSE);
  if (status == PR_FAILURE) {
    fprintf(stderr, "PR_SetFDInheritable failed\n");
    exit(1);
  }
  pipe_write = PR_GetInheritedFD("PIPE_WRITE");
  if (pipe_write == NULL) {
    fprintf(stderr, "PR_GetInheritedFD failed\n");
    exit(1);
  }
  status = PR_SetFDInheritable(pipe_write, PR_FALSE);
  if (status == PR_FAILURE) {
    fprintf(stderr, "PR_SetFDInheritable failed\n");
    exit(1);
  }

  for (idx = 0; idx < NUM_ITERATIONS; idx++) {
    memset(buf, 0, sizeof(buf));
    nBytes = PR_Read(pipe_read, buf, sizeof(buf));
    if (nBytes == -1) {
      fprintf(stderr, "PR_Read failed: (%d, %d)\n", PR_GetError(),
              PR_GetOSError());
      exit(1);
    }
    printf("pong process: received \"%s\"\n", buf);
    if (nBytes != 5) {
      fprintf(stderr, "pong process: expected 5 bytes but got %d bytes\n",
              nBytes);
      exit(1);
    }
    if (strcmp(buf, "ping") != 0) {
      fprintf(stderr, "pong process: expected \"ping\" but got \"%s\"\n", buf);
      exit(1);
    }

    strcpy(buf, "pong");
    printf("pong process: sending \"%s\"\n", buf);
    nBytes = PR_Write(pipe_write, buf, 5);
    if (nBytes == -1) {
      fprintf(stderr, "PR_Write failed\n");
      exit(1);
    }
  }

  status = PR_Close(pipe_read);
  if (status == PR_FAILURE) {
    fprintf(stderr, "PR_Close failed\n");
    exit(1);
  }
  status = PR_Close(pipe_write);
  if (status == PR_FAILURE) {
    fprintf(stderr, "PR_Close failed\n");
    exit(1);
  }
  return 0;
}