/* 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/. */

#include "nspr.h"
#include "plgetopt.h"

#include <stdio.h>

#ifdef DEBUG
#  define SEM_D "D"
#else
#  define SEM_D
#endif
#ifdef IS_64
#  define SEM_64 "64"
#else
#  define SEM_64
#endif

#define NO_SUCH_SEM_NAME "/tmp/nosuchsem.sem" SEM_D SEM_64
#define SEM_NAME1 "/tmp/foo.sem" SEM_D SEM_64
#define EXE_NAME "semaerr1"
#define SEM_MODE 0666

static PRBool debug_mode = PR_FALSE;

static void Help(void) {
  fprintf(stderr, "semaerr test program usage:\n");
  fprintf(stderr, "\t-d           debug mode         (FALSE)\n");
  fprintf(stderr, "\t-h           this message\n");
} /* Help */

int main(int argc, char** argv) {
  PLOptStatus os;
  PLOptState* opt = PL_CreateOptState(argc, argv, "dh");
  PRSem* sem;
  char* child_argv[32];
  char** child_arg;
  PRProcess* proc;
  PRInt32 exit_code;

  while (PL_OPT_EOL != (os = PL_GetNextOpt(opt))) {
    if (PL_OPT_BAD == os) {
      continue;
    }
    switch (opt->option) {
      case 'd': /* debug mode */
        debug_mode = PR_TRUE;
        break;
      case 'h':
      default:
        Help();
        return 2;
    }
  }
  PL_DestroyOptState(opt);

  /*
   * Open a nonexistent semaphore without the PR_SEM_CREATE
   * flag should fail with PR_FILE_NOT_FOUND_ERROR.
   */
  (void)PR_DeleteSemaphore(NO_SUCH_SEM_NAME);
  sem = PR_OpenSemaphore(NO_SUCH_SEM_NAME, 0, 0, 0);
  if (NULL != sem) {
    fprintf(stderr,
            "Opening nonexistent semaphore %s "
            "without the PR_SEM_CREATE flag should fail "
            "but succeeded\n",
            NO_SUCH_SEM_NAME);
    exit(1);
  }
  if (PR_GetError() != PR_FILE_NOT_FOUND_ERROR) {
    fprintf(stderr, "Expected error is %d but got (%d, %d)\n",
            PR_FILE_NOT_FOUND_ERROR, PR_GetError(), PR_GetOSError());
    exit(1);
  }

  /*
   * Create a semaphore and let the another process
   * try PR_SEM_CREATE and PR_SEM_CREATE|PR_SEM_EXCL.
   */
  if (PR_DeleteSemaphore(SEM_NAME1) == PR_SUCCESS) {
    fprintf(stderr,
            "warning: deleted semaphore %s from previous "
            "run of the test\n",
            SEM_NAME1);
  }
  sem = PR_OpenSemaphore(SEM_NAME1, PR_SEM_CREATE, SEM_MODE, 0);
  if (sem == NULL) {
    fprintf(stderr, "PR_OpenSemaphore failed (%d, %d)\n", PR_GetError(),
            PR_GetOSError());
    exit(1);
  }
  child_arg = child_argv;
  *child_arg++ = EXE_NAME;
  if (debug_mode) {
    *child_arg++ = "-d";
  }
  *child_arg = NULL;
  proc = PR_CreateProcess(child_argv[0], child_argv, NULL, NULL);
  if (proc == NULL) {
    fprintf(stderr, "PR_CreateProcess failed\n");
    exit(1);
  }
  if (PR_WaitProcess(proc, &exit_code) == PR_FAILURE) {
    fprintf(stderr, "PR_WaitProcess failed\n");
    exit(1);
  }
  if (exit_code != 0) {
    fprintf(stderr, "process semaerr1 failed\n");
    exit(1);
  }
  if (PR_CloseSemaphore(sem) == PR_FAILURE) {
    fprintf(stderr, "PR_CloseSemaphore failed\n");
    exit(1);
  }
  if (PR_DeleteSemaphore(SEM_NAME1) == PR_FAILURE) {
    fprintf(stderr, "PR_DeleteSemaphore failed\n");
    exit(1);
  }

  printf("PASS\n");
  return 0;
}