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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#if defined(POSIX)
// Re-enable some forbidden symbols to avoid clashes with stat.h and unistd.h.
// Also with clock() in sys/time.h in some Mac OS X SDKs.
#define FORBIDDEN_SYMBOL_EXCEPTION_time_h
#define FORBIDDEN_SYMBOL_EXCEPTION_unistd_h
#define FORBIDDEN_SYMBOL_EXCEPTION_mkdir
#define FORBIDDEN_SYMBOL_EXCEPTION_getenv
#include "backends/fs/posix/posix-fs.h"
#include "backends/fs/stdiostream.h"
#include "common/algorithm.h"
#include <sys/param.h>
#include <sys/stat.h>
#include <dirent.h>
#include <stdio.h>
#ifdef __OS2__
#define INCL_DOS
#include <os2.h>
#endif
void POSIXFilesystemNode::setFlags() {
struct stat st;
_isValid = (0 == stat(_path.c_str(), &st));
_isDirectory = _isValid ? S_ISDIR(st.st_mode) : false;
}
POSIXFilesystemNode::POSIXFilesystemNode(const Common::String &p) {
assert(p.size() > 0);
// Expand "~/" to the value of the HOME env variable
if (p.hasPrefix("~/")) {
const char *home = getenv("HOME");
if (home != NULL && strlen(home) < MAXPATHLEN) {
_path = home;
// Skip over the tilda. We know that p contains at least
// two chars, so this is safe:
_path += p.c_str() + 1;
}
} else {
_path = p;
}
#ifdef __OS2__
// On OS/2, 'X:/' is a root of drive X, so we should not remove that last
// slash.
if (!(_path.size() == 3 && _path.hasSuffix(":/")))
#endif
// Normalize the path (that is, remove unneeded slashes etc.)
_path = Common::normalizePath(_path, '/');
_displayName = Common::lastPathComponent(_path, '/');
// TODO: should we turn relative paths into absolute ones?
// Pro: Ensures the "getParent" works correctly even for relative dirs.
// Contra: The user may wish to use (and keep!) relative paths in his
// config file, and converting relative to absolute paths may hurt him...
//
// An alternative approach would be to change getParent() to work correctly
// if "_path" is the empty string.
#if 0
if (!_path.hasPrefix("/")) {
char buf[MAXPATHLEN+1];
getcwd(buf, MAXPATHLEN);
strcat(buf, "/");
_path = buf + _path;
}
#endif
// TODO: Should we enforce that the path is absolute at this point?
//assert(_path.hasPrefix("/"));
setFlags();
}
AbstractFSNode *POSIXFilesystemNode::getChild(const Common::String &n) const {
assert(!_path.empty());
assert(_isDirectory);
// Make sure the string contains no slashes
assert(!n.contains('/'));
// We assume here that _path is already normalized (hence don't bother to call
// Common::normalizePath on the final path).
Common::String newPath(_path);
if (_path.lastChar() != '/')
newPath += '/';
newPath += n;
return makeNode(newPath);
}
bool POSIXFilesystemNode::getChildren(AbstractFSList &myList, ListMode mode, bool hidden) const {
assert(_isDirectory);
#ifdef __OS2__
if (_path == "/") {
// Special case for the root dir: List all DOS drives
ULONG ulDrvNum;
ULONG ulDrvMap;
DosQueryCurrentDisk(&ulDrvNum, &ulDrvMap);
for (int i = 0; i < 26; i++) {
if (ulDrvMap & 1) {
char drive_root[] = "A:/";
drive_root[0] += i;
POSIXFilesystemNode *entry = new POSIXFilesystemNode();
entry->_isDirectory = true;
entry->_isValid = true;
entry->_path = drive_root;
entry->_displayName = "[" + Common::String(drive_root, 2) + "]";
myList.push_back(entry);
}
ulDrvMap >>= 1;
}
return true;
}
#endif
DIR *dirp = opendir(_path.c_str());
struct dirent *dp;
if (dirp == NULL)
return false;
// loop over dir entries using readdir
while ((dp = readdir(dirp)) != NULL) {
// Skip 'invisible' files if necessary
if (dp->d_name[0] == '.' && !hidden) {
continue;
}
// Skip '.' and '..' to avoid cycles
if ((dp->d_name[0] == '.' && dp->d_name[1] == 0) || (dp->d_name[0] == '.' && dp->d_name[1] == '.')) {
continue;
}
// Start with a clone of this node, with the correct path set
POSIXFilesystemNode entry(*this);
entry._displayName = dp->d_name;
if (_path.lastChar() != '/')
entry._path += '/';
entry._path += entry._displayName;
#if defined(SYSTEM_NOT_SUPPORTING_D_TYPE)
/* TODO: d_type is not part of POSIX, so it might not be supported
* on some of our targets. For those systems where it isn't supported,
* add this #elif case, which tries to use stat() instead.
*
* The d_type method is used to avoid costly recurrent stat() calls in big
* directories.
*/
entry.setFlags();
#else
if (dp->d_type == DT_UNKNOWN) {
// Fall back to stat()
entry.setFlags();
} else {
entry._isValid = (dp->d_type == DT_DIR) || (dp->d_type == DT_REG) || (dp->d_type == DT_LNK);
if (dp->d_type == DT_LNK) {
struct stat st;
if (stat(entry._path.c_str(), &st) == 0)
entry._isDirectory = S_ISDIR(st.st_mode);
else
entry._isDirectory = false;
} else {
entry._isDirectory = (dp->d_type == DT_DIR);
}
}
#endif
// Skip files that are invalid for some reason (e.g. because we couldn't
// properly stat them).
if (!entry._isValid)
continue;
// Honor the chosen mode
if ((mode == Common::FSNode::kListFilesOnly && entry._isDirectory) ||
(mode == Common::FSNode::kListDirectoriesOnly && !entry._isDirectory))
continue;
myList.push_back(new POSIXFilesystemNode(entry));
}
closedir(dirp);
return true;
}
AbstractFSNode *POSIXFilesystemNode::getParent() const {
if (_path == "/")
return 0; // The filesystem root has no parent
#ifdef __OS2__
if (_path.size() == 3 && _path.hasSuffix(":/"))
// This is a root directory of a drive
return makeNode("/"); // return a virtual root for a list of drives
#endif
const char *start = _path.c_str();
const char *end = start + _path.size();
// Strip of the last component. We make use of the fact that at this
// point, _path is guaranteed to be normalized
while (end > start && *(end-1) != '/')
end--;
if (end == start) {
// This only happens if we were called with a relative path, for which
// there simply is no parent.
// TODO: We could also resolve this by assuming that the parent is the
// current working directory, and returning a node referring to that.
return 0;
}
return makeNode(Common::String(start, end));
}
Common::SeekableReadStream *POSIXFilesystemNode::createReadStream() {
return StdioStream::makeFromPath(getPath(), false);
}
Common::WriteStream *POSIXFilesystemNode::createWriteStream() {
return StdioStream::makeFromPath(getPath(), true);
}
#endif //#if defined(POSIX)
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