/* 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: pipeping.c
 *
 * Description:
 * This test runs in conjunction with the pipepong test.
 * This test creates two pipes and redirects the stdin and
 * stdout of the pipepong test to the pipes.  Then this
 * test writes "ping" to the pipepong test and the pipepong
 * test writes "pong" back.  To run this pair of tests,
 * just invoke pipeping.
 *
 * Tested areas: process creation, pipes, file descriptor
 * inheritance, standard I/O redirection.
 */

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

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

static char* child_argv[] = {"pipepong", NULL};

#define NUM_ITERATIONS 10

int main(int argc, char** argv) {
  PRFileDesc* in_pipe[2];
  PRFileDesc* out_pipe[2];
  PRStatus status;
  PRProcess* process;
  PRProcessAttr* attr;
  char buf[1024];
  PRInt32 nBytes;
  PRInt32 exitCode;
  int idx;

  status = PR_CreatePipe(&in_pipe[0], &in_pipe[1]);
  if (status == PR_FAILURE) {
    fprintf(stderr, "PR_CreatePipe failed\n");
    exit(1);
  }
  status = PR_CreatePipe(&out_pipe[0], &out_pipe[1]);
  if (status == PR_FAILURE) {
    fprintf(stderr, "PR_CreatePipe failed\n");
    exit(1);
  }

  status = PR_SetFDInheritable(in_pipe[0], PR_FALSE);
  if (status == PR_FAILURE) {
    fprintf(stderr, "PR_SetFDInheritable failed\n");
    exit(1);
  }
  status = PR_SetFDInheritable(in_pipe[1], PR_TRUE);
  if (status == PR_FAILURE) {
    fprintf(stderr, "PR_SetFDInheritable failed\n");
    exit(1);
  }
  status = PR_SetFDInheritable(out_pipe[0], PR_TRUE);
  if (status == PR_FAILURE) {
    fprintf(stderr, "PR_SetFDInheritable failed\n");
    exit(1);
  }
  status = PR_SetFDInheritable(out_pipe[1], PR_FALSE);
  if (status == PR_FAILURE) {
    fprintf(stderr, "PR_SetFDInheritable failed\n");
    exit(1);
  }

  attr = PR_NewProcessAttr();
  if (attr == NULL) {
    fprintf(stderr, "PR_NewProcessAttr failed\n");
    exit(1);
  }

  PR_ProcessAttrSetStdioRedirect(attr, PR_StandardInput, out_pipe[0]);
  PR_ProcessAttrSetStdioRedirect(attr, PR_StandardOutput, in_pipe[1]);

  process = PR_CreateProcess(child_argv[0], child_argv, NULL, attr);
  if (process == NULL) {
    fprintf(stderr, "PR_CreateProcess failed\n");
    exit(1);
  }
  PR_DestroyProcessAttr(attr);
  status = PR_Close(out_pipe[0]);
  if (status == PR_FAILURE) {
    fprintf(stderr, "PR_Close failed\n");
    exit(1);
  }
  status = PR_Close(in_pipe[1]);
  if (status == PR_FAILURE) {
    fprintf(stderr, "PR_Close failed\n");
    exit(1);
  }

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

  status = PR_Close(in_pipe[0]);
  if (status == PR_FAILURE) {
    fprintf(stderr, "PR_Close failed\n");
    exit(1);
  }
  status = PR_Close(out_pipe[1]);
  if (status == PR_FAILURE) {
    fprintf(stderr, "PR_Close failed\n");
    exit(1);
  }
  status = PR_WaitProcess(process, &exitCode);
  if (status == PR_FAILURE) {
    fprintf(stderr, "PR_WaitProcess failed\n");
    exit(1);
  }
  if (exitCode == 0) {
    printf("PASS\n");
    return 0;
  } else {
    printf("FAIL\n");
    return 1;
  }
}