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Clean up some filesys code

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This commit is contained in:
sfan5
2025-11-20 18:51:00 +01:00
parent 5e91322fad
commit 7594b19644
7 changed files with 118 additions and 96 deletions
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138
src/filesys.cpp
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@@ -62,46 +62,39 @@ std::vector<DirListNode> GetDirListing(const std::string &pathstring)
{
std::vector<DirListNode> listing;
WIN32_FIND_DATA FindFileData;
HANDLE hFind = INVALID_HANDLE_VALUE;
WIN32_FIND_DATA FindFileData{};
DWORD dwError;
std::string dirSpec = pathstring + "\\*";
// Find the first file in the directory.
hFind = FindFirstFile(dirSpec.c_str(), &FindFileData);
HANDLE hFind = FindFirstFile(dirSpec.c_str(), &FindFileData);
if (hFind == INVALID_HANDLE_VALUE) {
dwError = GetLastError();
if (dwError != ERROR_FILE_NOT_FOUND && dwError != ERROR_PATH_NOT_FOUND) {
errorstream << "GetDirListing: FindFirstFile error."
<< " Error is " << dwError << std::endl;
errorstream << "GetDirListing: FindFirstFile error code "
<< dwError << std::endl;
}
} else {
// NOTE:
// Be very sure to not include '..' in the results, it will
// result in an epic failure when deleting stuff.
DirListNode node;
node.name = FindFileData.cFileName;
node.dir = FindFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY;
if (node.name != "." && node.name != "..")
listing.push_back(node);
// List all the other files in the directory.
while (FindNextFile(hFind, &FindFileData) != 0) {
// do-while because the first file is already in the struct
do {
DirListNode node;
node.name = FindFileData.cFileName;
node.dir = FindFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY;
if(node.name != "." && node.name != "..")
listing.push_back(node);
}
listing.push_back(std::move(node));
} while (FindNextFile(hFind, &FindFileData) != 0);
dwError = GetLastError();
FindClose(hFind);
if (dwError != ERROR_NO_MORE_FILES) {
errorstream << "GetDirListing: FindNextFile error."
<< " Error is " << dwError << std::endl;
errorstream << "GetDirListing: FindNextFile error code "
<< dwError << std::endl;
listing.clear();
return listing;
}
@@ -111,10 +104,8 @@ std::vector<DirListNode> GetDirListing(const std::string &pathstring)
bool CreateDir(const std::string &path)
{
bool r = CreateDirectory(path.c_str(), NULL);
if(r == true)
return true;
if(GetLastError() == ERROR_ALREADY_EXISTS)
bool r = CreateDirectory(path.c_str(), nullptr);
if (r || GetLastError() == ERROR_ALREADY_EXISTS)
return true;
return false;
}
@@ -182,25 +173,31 @@ bool RecursiveDelete(const std::string &path)
return true;
}
bool DeleteSingleFileOrEmptyDirectory(const std::string &path)
bool DeleteSingleFileOrEmptyDirectory(const std::string &path, bool log_error)
{
if (!IsDir(path))
return DeleteFile(path.c_str());
return RemoveDirectory(path.c_str());
if (!IsDir(path)) {
bool ok = DeleteFile(path.c_str()) != 0;
if (!ok && log_error)
errorstream << "DeleteFile failed: " << LAST_OS_ERROR() << std::endl;
}
bool ok = RemoveDirectory(path.c_str()) != 0;
if (!ok && log_error)
errorstream << "RemoveDirectory failed: " << LAST_OS_ERROR() << std::endl;
return ok;
}
std::string TempPath()
{
DWORD bufsize = GetTempPath(0, NULL);
if(bufsize == 0){
errorstream<<"GetTempPath failed, error = "<<GetLastError()<<std::endl;
DWORD bufsize = GetTempPath(0, nullptr);
if (bufsize == 0) {
errorstream << "GetTempPath failed: " << LAST_OS_ERROR() << std::endl;
return "";
}
std::string buf;
buf.resize(bufsize);
DWORD len = GetTempPath(bufsize, &buf[0]);
if(len == 0 || len > bufsize){
errorstream<<"GetTempPath failed, error = "<<GetLastError()<<std::endl;
if (len == 0 || len > bufsize) {
errorstream << "GetTempPath failed: " << LAST_OS_ERROR() << std::endl;
return "";
}
buf.resize(len);
@@ -235,7 +232,7 @@ bool CopyFileContents(const std::string &source, const std::string &target)
nullptr, COPY_FILE_ALLOW_DECRYPTED_DESTINATION);
if (!ok) {
errorstream << "copying " << source << " to " << target
<< " failed: " << GetLastError() << std::endl;
<< " failed: " << LAST_OS_ERROR() << std::endl;
return false;
}
@@ -265,13 +262,12 @@ std::vector<DirListNode> GetDirListing(const std::string &pathstring)
std::vector<DirListNode> listing;
DIR *dp;
struct dirent *dirp;
if((dp = opendir(pathstring.c_str())) == NULL) {
//infostream<<"Error("<<errno<<") opening "<<pathstring<<std::endl;
if((dp = opendir(pathstring.c_str())) == nullptr) {
return listing;
}
while ((dirp = readdir(dp)) != NULL) {
struct dirent *dirp;
while ((dirp = readdir(dp)) != nullptr) {
// NOTE:
// Be very sure to not include '..' in the results, it will
// result in an epic failure when deleting stuff.
@@ -301,12 +297,13 @@ std::vector<DirListNode> GetDirListing(const std::string &pathstring)
*/
if(isdir == -1) {
struct stat statbuf{};
if (stat((pathstring + "/" + node.name).c_str(), &statbuf))
if (stat((pathstring + DIR_DELIM + node.name).c_str(), &statbuf))
continue;
isdir = ((statbuf.st_mode & S_IFDIR) == S_IFDIR);
}
node.dir = isdir;
listing.push_back(node);
listing.push_back(std::move(node));
}
closedir(dp);
@@ -315,7 +312,7 @@ std::vector<DirListNode> GetDirListing(const std::string &pathstring)
bool CreateDir(const std::string &path)
{
int r = mkdir(path.c_str(), S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH);
int r = mkdir(path.c_str(), 0775);
if (r == 0) {
return true;
}
@@ -407,40 +404,35 @@ bool RecursiveDelete(const std::string &path)
}
}
bool DeleteSingleFileOrEmptyDirectory(const std::string &path)
bool DeleteSingleFileOrEmptyDirectory(const std::string &path, bool log_error)
{
if (IsDir(path)) {
bool did = (rmdir(path.c_str()) == 0);
if (!did)
errorstream << "rmdir errno: " << errno << ": " << strerror(errno)
<< std::endl;
bool did = rmdir(path.c_str()) == 0;
if (!did && log_error)
errorstream << "rmdir error: " << LAST_OS_ERROR() << std::endl;
return did;
}
bool did = (unlink(path.c_str()) == 0);
if (!did)
errorstream << "unlink errno: " << errno << ": " << strerror(errno)
<< std::endl;
bool did = unlink(path.c_str()) == 0;
if (!did && log_error)
errorstream << "unlink error: " << LAST_OS_ERROR() << std::endl;
return did;
}
std::string TempPath()
{
/*
Should the environment variables TMPDIR, TMP and TEMP
and the macro P_tmpdir (if defined by stdio.h) be checked
before falling back on /tmp?
Probably not, because this function is intended to be
compatible with lua's os.tmpname which under the default
configuration hardcodes mkstemp("/tmp/lua_XXXXXX").
*/
#ifdef __ANDROID__
return porting::path_cache;
#else
const char *env_tmpdir = getenv("TMPDIR");
if (env_tmpdir && env_tmpdir[0] == DIR_DELIM_CHAR)
return env_tmpdir;
#ifdef P_tmpdir
return P_tmpdir;
#else
return DIR_DELIM "tmp";
#endif
#endif
}
std::string CreateTempFile()
@@ -560,7 +552,7 @@ bool CopyFileContents(const std::string &source, const std::string &target)
void GetRecursiveDirs(std::vector<std::string> &dirs, const std::string &dir)
{
static const std::set<char> chars_to_ignore = { '_', '.' };
constexpr std::string_view chars_to_ignore = "_.";
if (dir.empty() || !IsDir(dir))
return;
dirs.push_back(dir);
@@ -575,39 +567,23 @@ std::vector<std::string> GetRecursiveDirs(const std::string &dir)
}
void GetRecursiveSubPaths(const std::string &path,
std::vector<std::string> &dst,
bool list_files,
const std::set<char> &ignore)
std::vector<std::string> &dst,
bool list_files,
std::string_view ignore)
{
std::vector<DirListNode> content = GetDirListing(path);
for (const auto &n : content) {
std::string fullpath = path + DIR_DELIM + n.name;
if (ignore.count(n.name[0]))
if (ignore.find(n.name[0]) != std::string_view::npos)
continue;
if (list_files || n.dir)
dst.push_back(fullpath);
// Note: this is probably vulnerable to a symlink infinite loop trap
if (n.dir)
GetRecursiveSubPaths(fullpath, dst, list_files, ignore);
}
}
bool RecursiveDeleteContent(const std::string &path)
{
infostream<<"Removing content of \""<<path<<"\""<<std::endl;
std::vector<DirListNode> list = GetDirListing(path);
for (const DirListNode &dln : list) {
if(trim(dln.name) == "." || trim(dln.name) == "..")
continue;
std::string childpath = path + DIR_DELIM + dln.name;
bool r = RecursiveDelete(childpath);
if(!r) {
errorstream << "Removing \"" << childpath << "\" failed" << std::endl;
return false;
}
}
return true;
}
bool CreateAllDirs(const std::string &path)
{
std::vector<std::string> tocreate;
@@ -618,8 +594,8 @@ bool CreateAllDirs(const std::string &path)
if (removed.empty())
break;
}
for(int i=tocreate.size()-1;i>=0;i--)
if(!CreateDir(tocreate[i]))
for (auto it = tocreate.rbegin(); it != tocreate.rend(); ++it)
if(!CreateDir(*it))
return false;
return true;
}