mirror of https://code.videolan.org/videolan/vlc
395 lines
8.8 KiB
C
395 lines
8.8 KiB
C
/*****************************************************************************
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* filesystem.c: Windows file system helpers
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*****************************************************************************
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* Copyright (C) 2005-2006 VLC authors and VideoLAN
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* Copyright © 2005-2008 Rémi Denis-Courmont
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*
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* Authors: Rémi Denis-Courmont
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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/*****************************************************************************
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* Preamble
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*****************************************************************************/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <assert.h>
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#include <stdio.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <dirent.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <winsock2.h>
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#include <direct.h>
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#include <vlc_common.h>
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#include <vlc_charset.h>
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#include <vlc_fs.h>
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#include "libvlc.h" /* vlc_mkdir */
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#ifdef _MSC_VER
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# define __STDC__ 1
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# include <io.h> /* _pipe */
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#endif
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static wchar_t *widen_path (const char *path)
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{
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wchar_t *wpath;
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errno = 0;
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wpath = ToWide (path);
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if (wpath == NULL)
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{
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if (errno == 0)
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errno = ENOENT;
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return NULL;
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}
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return wpath;
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}
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int vlc_open (const char *filename, int flags, ...)
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{
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int mode = 0;
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va_list ap;
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flags |= O_NOINHERIT; /* O_CLOEXEC */
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/* Defaults to binary mode */
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if ((flags & O_TEXT) == 0)
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flags |= O_BINARY;
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va_start (ap, flags);
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if (flags & O_CREAT)
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{
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int unixmode = va_arg(ap, int);
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if (unixmode & 0444)
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mode |= _S_IREAD;
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if (unixmode & 0222)
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mode |= _S_IWRITE;
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}
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va_end (ap);
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/*
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* open() cannot open files with non-“ANSI” characters on Windows.
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* We use _wopen() instead. Same thing for mkdir() and stat().
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*/
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wchar_t *wpath = widen_path (filename);
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if (wpath == NULL)
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return -1;
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int fd = _wopen (wpath, flags, mode);
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free (wpath);
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return fd;
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}
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int vlc_openat (int dir, const char *filename, int flags, ...)
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{
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(void) dir; (void) filename; (void) flags;
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errno = ENOSYS;
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return -1;
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}
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int vlc_memfd (void)
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{
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#if 0
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int fd, err;
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FILE *stream = tmpfile();
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if (stream == NULL)
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return -1;
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fd = vlc_dup(fileno(stream));
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err = errno;
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fclose(stream);
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errno = err;
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return fd;
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#else /* Not currently used */
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errno = ENOSYS;
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return -1;
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#endif
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}
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int vlc_close (int fd)
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{
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return close (fd);
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}
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int vlc_mkdir( const char *dirname, mode_t mode )
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{
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wchar_t *wpath = widen_path (dirname);
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if (wpath == NULL)
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return -1;
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int ret = _wmkdir (wpath);
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free (wpath);
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(void) mode;
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return ret;
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}
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char *vlc_getcwd (void)
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{
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#if VLC_WINSTORE_APP
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return NULL;
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#else
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wchar_t *wdir = _wgetcwd (NULL, 0);
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if (wdir == NULL)
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return NULL;
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char *dir = FromWide (wdir);
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free (wdir);
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return dir;
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#endif
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}
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/* Under Windows, these wrappers return the list of drive letters
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* when called with an empty argument or just '\'. */
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DIR *vlc_opendir (const char *dirname)
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{
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wchar_t *wpath = widen_path (dirname);
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if (wpath == NULL)
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return NULL;
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vlc_DIR *p_dir = malloc (sizeof (*p_dir));
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if (unlikely(p_dir == NULL))
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{
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free(wpath);
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return NULL;
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}
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#if !VLC_WINSTORE_APP
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/* Special mode to list drive letters */
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if (wpath[0] == L'\0' || (wcscmp (wpath, L"\\") == 0))
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{
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free (wpath);
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p_dir->wdir = NULL;
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p_dir->u.drives = GetLogicalDrives ();
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p_dir->entry = NULL;
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return (void *)p_dir;
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}
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#endif
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assert (wpath[0]); // wpath[1] is defined
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p_dir->u.insert_dot_dot = !wcscmp (wpath + 1, L":\\");
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_WDIR *wdir = _wopendir (wpath);
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free (wpath);
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if (wdir == NULL)
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{
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free (p_dir);
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return NULL;
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}
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p_dir->wdir = wdir;
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p_dir->entry = NULL;
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return (void *)p_dir;
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}
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const char *vlc_readdir (DIR *dir)
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{
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vlc_DIR *p_dir = (vlc_DIR *)dir;
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free(p_dir->entry);
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#if !VLC_WINSTORE_APP
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/* Drive letters mode */
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if (p_dir->wdir == NULL)
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{
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DWORD drives = p_dir->u.drives;
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if (drives == 0)
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{
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p_dir->entry = NULL;
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return NULL; /* end */
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}
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unsigned int i;
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for (i = 0; !(drives & 1); i++)
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drives >>= 1;
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p_dir->u.drives &= ~(1UL << i);
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assert (i < 26);
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if (asprintf (&p_dir->entry, "%c:\\", 'A' + i) == -1)
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p_dir->entry = NULL;
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}
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else
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#endif
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if (p_dir->u.insert_dot_dot)
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{
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/* Adds "..", gruik! */
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p_dir->u.insert_dot_dot = false;
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p_dir->entry = strdup ("..");
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}
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else
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{
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struct _wdirent *ent = _wreaddir (p_dir->wdir);
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p_dir->entry = (ent != NULL) ? FromWide (ent->d_name) : NULL;
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}
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return p_dir->entry;
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}
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int vlc_stat (const char *filename, struct stat *buf)
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{
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wchar_t *wpath = widen_path (filename);
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if (wpath == NULL)
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return -1;
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static_assert (sizeof (*buf) == sizeof (struct _stati64),
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"Mismatched struct stat definition.");
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int ret = _wstati64 (wpath, buf);
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free (wpath);
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return ret;
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}
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int vlc_lstat (const char *filename, struct stat *buf)
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{
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return vlc_stat (filename, buf);
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}
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int vlc_unlink (const char *filename)
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{
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wchar_t *wpath = widen_path (filename);
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if (wpath == NULL)
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return -1;
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int ret = _wunlink (wpath);
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free (wpath);
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return ret;
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}
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int vlc_rename (const char *oldpath, const char *newpath)
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{
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int ret = -1;
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wchar_t *wold = widen_path (oldpath), *wnew = widen_path (newpath);
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if (wold == NULL || wnew == NULL)
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goto out;
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if (_wrename (wold, wnew) && (errno == EACCES || errno == EEXIST))
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{ /* Windows does not allow atomic file replacement */
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if (_wremove (wnew))
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{
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errno = EACCES; /* restore errno */
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goto out;
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}
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if (_wrename (wold, wnew))
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goto out;
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}
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ret = 0;
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out:
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free (wnew);
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free (wold);
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return ret;
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}
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int vlc_dup (int oldfd)
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{
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int fd = dup (oldfd);
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if (fd != -1)
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setmode (fd, O_BINARY);
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return fd;
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}
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int vlc_pipe (int fds[2])
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{
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#if VLC_WINSTORE_APP
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_set_errno(EPERM);
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return -1;
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#else
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return _pipe (fds, 32768, O_NOINHERIT | O_BINARY);
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#endif
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}
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ssize_t vlc_write(int fd, const void *buf, size_t len)
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{
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return write(fd, buf, len);
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}
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ssize_t vlc_writev(int fd, const struct iovec *iov, int count)
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{
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(void) fd; (void) iov; (void) count;
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vlc_assert_unreachable();
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}
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#include <vlc_network.h>
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int vlc_socket (int pf, int type, int proto, bool nonblock)
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{
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int fd = socket (pf, type, proto);
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if (fd == -1)
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return -1;
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if (nonblock)
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ioctlsocket (fd, FIONBIO, &(unsigned long){ 1 });
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return fd;
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}
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int vlc_socketpair(int pf, int type, int proto, int fds[2], bool nonblock)
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{
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(void) pf; (void) type; (void) proto; (void) fds; (void) nonblock;
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errno = ENOSYS;
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return -1;
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}
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int vlc_accept (int lfd, struct sockaddr *addr, socklen_t *alen, bool nonblock)
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{
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int fd = accept (lfd, addr, alen);
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if (fd != -1 && nonblock)
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ioctlsocket (fd, FIONBIO, &(unsigned long){ 1 });
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return fd;
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}
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#if !VLC_WINSTORE_APP
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FILE *vlc_win32_tmpfile(void)
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{
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WCHAR tmp_path[MAX_PATH-14];
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int i_ret = GetTempPath (MAX_PATH-14, tmp_path);
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if (i_ret == 0)
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return NULL;
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WCHAR tmp_name[MAX_PATH];
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i_ret = GetTempFileName(tmp_path, TEXT("VLC"), 0, tmp_name);
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if (i_ret == 0)
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return NULL;
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HANDLE hFile = CreateFile(tmp_name,
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GENERIC_READ | GENERIC_WRITE | DELETE, 0, NULL, CREATE_ALWAYS,
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FILE_ATTRIBUTE_TEMPORARY | FILE_FLAG_DELETE_ON_CLOSE, NULL);
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if (hFile == INVALID_HANDLE_VALUE)
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return NULL;
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int fd = _open_osfhandle((intptr_t)hFile, 0);
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if (fd == -1) {
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CloseHandle(hFile);
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return NULL;
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}
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FILE *stream = _fdopen(fd, "w+b");
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if (stream == NULL) {
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_close(fd);
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return NULL;
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}
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return stream;
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}
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#else
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FILE *vlc_win32_tmpfile(void)
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{
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return NULL;
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}
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#endif
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