modules/libmar/src/mar_extract.c
author Mike Hommey <mh+mozilla@glandium.org>
Thu, 20 Sep 2012 09:52:12 +0200
changeset 107617 61d680a20cea0c0a41b9041a6741c53f77cfd1c6
parent 94475 f4157e8c410708d76703f19e4dfb61859bfe32d8
child 142673 07fdbc86f5b1dff1edd1130f56506c45e86c9a59
permissions -rw-r--r--
Bug 792347 - Fix PathifyURI to properly return a resource/app path for resource://app/ urls when the application is in a subdirectory of the GRE. r=mwu

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* 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 <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include "mar_private.h"
#include "mar.h"

#ifdef XP_WIN
#include <io.h>
#include <direct.h>
#endif

/* Ensure that the directory containing this file exists */
static int mar_ensure_parent_dir(const char *path)
{
  char *slash = strrchr(path, '/');
  if (slash)
  {
    *slash = '\0';
    mar_ensure_parent_dir(path);
#ifdef XP_WIN
    _mkdir(path);
#else
    mkdir(path, 0755);
#endif
    *slash = '/';
  }
  return 0;
}

static int mar_test_callback(MarFile *mar, const MarItem *item, void *unused) {
  FILE *fp;
  char buf[BLOCKSIZE];
  int fd, len, offset = 0;

  if (mar_ensure_parent_dir(item->name))
    return -1;

#ifdef XP_WIN
  fd = _open(item->name, _O_BINARY|_O_CREAT|_O_TRUNC|_O_WRONLY, item->flags);
#else
  fd = creat(item->name, item->flags);
#endif
  if (fd == -1)
    return -1;

  fp = fdopen(fd, "wb");
  if (!fp)
    return -1;

  while ((len = mar_read(mar, item, offset, buf, sizeof(buf))) > 0) {
    if (fwrite(buf, len, 1, fp) != 1)
      break;
    offset += len;
  }

  fclose(fp);
  return len == 0 ? 0 : -1;
}

int mar_extract(const char *path) {
  MarFile *mar;
  int rv;

  mar = mar_open(path);
  if (!mar)
    return -1;

  rv = mar_enum_items(mar, mar_test_callback, NULL);

  mar_close(mar);
  return rv;
}