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/*
Copyright (C) 2021-2024 Selwin van Dijk
This file is part of signalbackup-tools.
signalbackup-tools 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 3 of the License, or
(at your option) any later version.
signalbackup-tools 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 signalbackup-tools. If not, see <https://www.gnu.org/licenses/>.
*/
#include "signalbackup.ih"
std::string SignalBackup::sanitizeFilename(std::string const &filename) const
{
std::string result;
#if !defined(_WIN32) && !defined(__MINGW64__)
// filter disallowed characters. (Note this is not an exact science)
for (char c : filename)
result += ((c == '/' || c == '\0' || c == '\n') ? '_' : c); // newline is technically allowed I think
#else // WINDOWS, NOT TESTED
auto icasecmp = [](char a, char b)
{
return ((a == b) || (tolower(static_cast<unsigned char>(a)) == tolower(static_cast<unsigned char>(b))));
};
std::vector<std::string> const reserved =
{
"CON",
"PRN",
"AUX",
"CLOCK$",
"NUL",
"COM0", "COM1", "COM2", "COM3", "COM4", "COM5", "COM6", "COM7", "COM8", "COM9",
"LPT0", "LPT1", "LPT2", "LPT3", "LPT4", "LPT5", "LPT6", "LPT7", "LPT8", "LPT9",
/* these are ntfs things, best just not allow them.... */
"$Mft",
"$MftMirr",
"$LogFile",
"$Volume",
"$AttrDef",
"$Bitmap",
"$Boot",
"$BadClus",
"$Secure",
"$Upcase",
"$Extend",
"$Quota",
"$ObjId",
"$Reparse",
};
// filter reserved filenames
for (auto const &r : reserved)
if (filename.size() == r.size() &&
std::equal(filename.begin(), filename.end(),
r.begin(), r.end(), icasecmp))
return "_" + filename;
// filter disallowed characters. (Note this is not an exact science)
for (char c : filename)
result += ((c == '/' || c == '\\' || c == '?' ||
c == '*' || c == ':' || c == '|' ||
c == '"' || c == '<' || c == '>' ||
c <= 0x1f || c == 0x7f) ? '_' : c);
// trailing whitespace or periods are (possibly) technically allowed
// by the filesystem, but not supported by windows shell and UI
while (result.back() == ' ' ||
result.back() == '.')
result.pop_back();
#endif
return result;
}
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