/* file_util.c
*
* $Id: file_util.c 20402 2007-01-12 03:05:28Z ulfl $
*
* Wiretap Library
* Copyright (c) 1998 by Gilbert Ramirez <gram@alumni.rice.edu>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
/* file wrapper functions to prevent the file functions from GLib like g_open(),
* as code compiled with MSVC 7 and above will collide with libs linked with msvcrt.dll (MSVC 6), lib GLib is
*
* DO NOT USE THESE FUNCTIONS DIRECTLY, USE eth_open() AND ALIKE FUNCTIONS FROM file_util.h INSTEAD!!!
*
* the following code is stripped down code copied from the GLib file glib/gstdio.h
* stipped down, because this is used on _WIN32 only and we use only wide char functions */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <glib.h>
#ifdef _WIN32
#include <windows.h>
#include <errno.h>
#include <wchar.h>
/*#include <direct.h>*/
#include <io.h>
#endif
#include "file_util.h"
/**
* g_open:
* @filename: a pathname in the GLib file name encoding (UTF-8 on Windows)
* @flags: as in open()
* @mode: as in open()
*
* A wrapper for the POSIX open() function. The open() function is
* used to convert a pathname into a file descriptor. Note that on
* POSIX systems file descriptors are implemented by the operating
* system. On Windows, it's the C library that implements open() and
* file descriptors. The actual Windows API for opening files is
* something different.
*
* See the C library manual for more details about open().
*
* Returns: a new file descriptor, or -1 if an error occurred. The
* return value can be used exactly like the return value from open().
*
* Since: 2.6
*/
int
eth_stdio_open (const gchar *filename,
int flags,
int mode)
{
#ifdef _WIN32
{
wchar_t *wfilename = g_utf8_to_utf16 (filename, -1, NULL, NULL, NULL);
int retval;
int save_errno;
if (wfilename == NULL)
{
errno = EINVAL;
return -1;
}
retval = _wopen (wfilename, flags, mode);
save_errno = errno;
g_free (wfilename);
errno = save_errno;
return retval;
}
#else
return open (filename, flags, mode);
#endif
}
/**
* g_rename:
* @oldfilename: a pathname in the GLib file name encoding (UTF-8 on Windows)
* @newfilename: a pathname in the GLib file name encoding
*
* A wrapper for the POSIX rename() function. The rename() function
* renames a file, moving it between directories if required.
*
* See your C library manual for more details about how rename() works
* on your system. Note in particular that on Win9x it is not possible
* to rename a file if a file with the new name already exists. Also
* it is not possible in general on Windows to rename an open file.
*
* Returns: 0 if the renaming succeeded, -1 if an error occurred
*
* Since: 2.6
*/
int
eth_stdio_rename (const gchar *oldfilename,
const gchar *newfilename)
{
#ifdef _WIN32
wchar_t *woldfilename = g_utf8_to_utf16 (oldfilename, -1, NULL, NULL, NULL);
wchar_t *wnewfilename;
int retval;
int save_errno = 0;
if (woldfilename == NULL)
{
errno = EINVAL;
return -1;
}
wnewfilename = g_utf8_to_utf16 (newfilename, -1, NULL, NULL, NULL);
if (wnewfilename == NULL)
{
g_free (woldfilename);
errno = EINVAL;
return -1;
}
if (MoveFileExW (woldfilename, wnewfilename, MOVEFILE_REPLACE_EXISTING))
retval = 0;
else
{
retval = -1;
switch (GetLastError ())
{
#define CASE(a,b) case ERROR_##a: save_errno = b; break
CASE (FILE_NOT_FOUND, ENOENT);
CASE (PATH_NOT_FOUND, ENOENT);
CASE (ACCESS_DENIED, EACCES);
CASE (NOT_SAME_DEVICE, EXDEV);
CASE (LOCK_VIOLATION, EACCES);
CASE (SHARING_VIOLATION, EACCES);
CASE (FILE_EXISTS, EEXIST);
CASE (ALREADY_EXISTS, EEXIST);
#undef CASE
default: save_errno = EIO;
}
}
g_free (woldfilename);
g_free (wnewfilename);
errno = save_errno;
return retval;
#else
return rename (oldfilename, newfilename);
#endif
}
/**
* g_mkdir:
* @filename: a pathname in the GLib file name encoding (UTF-8 on Windows)
* @mode: permissions to use for the newly created directory
*
* A wrapper for the POSIX mkdir() function. The mkdir() function
* attempts to create a directory with the given name and permissions.
*
* See the C library manual for more details about mkdir().
*
* Returns: 0 if the directory was successfully created, -1 if an error
* occurred
*
* Since: 2.6
*/
int
eth_stdio_mkdir (const gchar *filename,
int mode)
{
#ifdef _WIN32
wchar_t *wfilename = g_utf8_to_utf16 (filename, -1, NULL, NULL, NULL);
int retval;
int save_errno;
if (wfilename == NULL)
{
errno = EINVAL;
return -1;
}
retval = _wmkdir (wfilename);
save_errno = errno;
g_free (wfilename);
errno = save_errno;
return retval;
#else
return mkdir (filename, mode);
#endif
}
/**
* g_stat:
* @filename: a pathname in the GLib file name encoding (UTF-8 on Windows)
* @buf: a pointer to a <structname>stat</structname> struct, which
* will be filled with the file information
*
* A wrapper for the POSIX stat() function. The stat() function
* returns information about a file.
*
* See the C library manual for more details about stat().
*
* Returns: 0 if the information was successfully retrieved, -1 if an error
* occurred
*
* Since: 2.6
*/
int
eth_stdio_stat (const gchar *filename,
struct stat *buf)
{
#ifdef _WIN32
wchar_t *wfilename = g_utf8_to_utf16 (filename, -1, NULL, NULL, NULL);
int retval;
int save_errno;
int len;
if (wfilename == NULL)
{
errno = EINVAL;
return -1;
}
len = wcslen (wfilename);
while (len > 0 && G_IS_DIR_SEPARATOR (wfilename[len-1]))
len--;
if (len > 0 &&
(!g_path_is_absolute (filename) || len > g_path_skip_root (filename) - filename))
wfilename[len] = '\0';
retval = _wstat (wfilename, (struct _stat *) buf);
save_errno = errno;
g_free (wfilename);
errno = save_errno;
return retval;
#else
return stat (filename, buf);
#endif
}
/**
* g_unlink:
* @filename: a pathname in the GLib file name encoding (UTF-8 on Windows)
*
* A wrapper for the POSIX unlink() function. The unlink() function
* deletes a name from the filesystem. If this was the last link to the
* file and no processes have it opened, the diskspace occupied by the
* file is freed.
*
* See your C library manual for more details about unlink(). Note
* that on Windows, it is in general not possible to delete files that
* are open to some process, or mapped into memory.
*
* Returns: 0 if the name was successfully deleted, -1 if an error
* occurred
*
* Since: 2.6
*/
int
eth_stdio_unlink (const gchar *filename)
{
#ifdef _WIN32
gchar *cp_filename = g_locale_from_utf8 (filename, -1, NULL, NULL, NULL);
int retval;
int save_errno;
if (cp_filename == NULL)
{
errno = EINVAL;
return -1;
}
retval = unlink (cp_filename);
save_errno = errno;
g_free (cp_filename);
errno = save_errno;
return retval;
#else
return unlink (filename);
#endif
}
/**
* g_remove:
* @filename: a pathname in the GLib file name encoding (UTF-8 on Windows)
*
* A wrapper for the POSIX remove() function. The remove() function
* deletes a name from the filesystem.
*
* See your C library manual for more details about how remove() works
* on your system. On Unix, remove() removes also directories, as it
* calls unlink() for files and rmdir() for directories. On Windows,
* although remove() in the C library only works for files, this
* function tries first remove() and then if that fails rmdir(), and
* thus works for both files and directories. Note however, that on
* Windows, it is in general not possible to remove a file that is
* open to some process, or mapped into memory.
*
* If this function fails on Windows you can't infer too much from the
* errno value. rmdir() is tried regardless of what caused remove() to
* fail. Any errno value set by remove() will be overwritten by that
* set by rmdir().
*
* Returns: 0 if the file was successfully removed, -1 if an error
* occurred
*
* Since: 2.6
*/
int
eth_stdio_remove (const gchar *filename)
{
#ifdef _WIN32
wchar_t *wfilename = g_utf8_to_utf16 (filename, -1, NULL, NULL, NULL);
int retval;
int save_errno;
if (wfilename == NULL)
{
errno = EINVAL;
return -1;
}
retval = _wremove (wfilename);
if (retval == -1)
retval = _wrmdir (wfilename);
save_errno = errno;
g_free (wfilename);
errno = save_errno;
return retval;
#else
return remove (filename);
#endif
}
/**
* g_fopen:
* @filename: a pathname in the GLib file name encoding (UTF-8 on Windows)
* @mode: a string describing the mode in which the file should be
* opened
*
* A wrapper for the POSIX fopen() function. The fopen() function opens
* a file and associates a new stream with it.
*
* See the C library manual for more details about fopen().
*
* Returns: A <type>FILE</type> pointer if the file was successfully
* opened, or %NULL if an error occurred
*
* Since: 2.6
*/
FILE *
eth_stdio_fopen (const gchar *filename,
const gchar *mode)
{
#ifdef _WIN32
wchar_t *wfilename = g_utf8_to_utf16 (filename, -1, NULL, NULL, NULL);
wchar_t *wmode;
FILE *retval;
int save_errno;
if (wfilename == NULL)
{
errno = EINVAL;
return NULL;
}
wmode = g_utf8_to_utf16 (mode, -1, NULL, NULL, NULL);
if (wmode == NULL)
{
g_free (wfilename);
errno = EINVAL;
return NULL;
}
retval = _wfopen (wfilename, wmode);
save_errno = errno;
g_free (wfilename);
g_free (wmode);
errno = save_errno;
return retval;
#else
return fopen (filename, mode);
#endif
}
/**
* g_freopen:
* @filename: a pathname in the GLib file name encoding (UTF-8 on Windows)
* @mode: a string describing the mode in which the file should be
* opened
* @stream: an existing stream which will be reused, or %NULL
*
* A wrapper for the POSIX freopen() function. The freopen() function
* opens a file and associates it with an existing stream.
*
* See the C library manual for more details about freopen().
*
* Returns: A <type>FILE</type> pointer if the file was successfully
* opened, or %NULL if an error occurred.
*
* Since: 2.6
*/
FILE *
eth_stdio_freopen (const gchar *filename,
const gchar *mode,
FILE *stream)
{
#ifdef _WIN32
wchar_t *wfilename = g_utf8_to_utf16 (filename, -1, NULL, NULL, NULL);
wchar_t *wmode;
FILE *retval;
int save_errno;
if (wfilename == NULL)
{
errno = EINVAL;
return NULL;
}
wmode = g_utf8_to_utf16 (mode, -1, NULL, NULL, NULL);
if (wmode == NULL)
{
g_free (wfilename);
errno = EINVAL;
return NULL;
}
retval = _wfreopen (wfilename, wmode, stream);
save_errno = errno;
g_free (wfilename);
g_free (wmode);
errno = save_errno;
return retval;
#else
return freopen (filename, mode, stream);
#endif
}
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