210 questions
Score of 4
1 answer
144 views
std::filesystem::path::parent_path() GCC vs Clang behavior with multiple leading separators
I stumbled upon different behavior of std::filesystem::path::parent_path() when a path contains leading slashes. Clang says that the parent of ///a is /// (which is what I would expect), but GCC says ...
- reputation score 725
Score of 0
1 answer
169 views
Syncronizing files between threads
Assume two threads, t1 and t2, mutex m, and file f running on an RPi.
t1 waits at m, creates a file f with some content, closes f, and verifies that f exists. Finally, m is released, and t1 does a ...
- reputation score 63
Score of 1
4 answers
233 views
How to convert std::filesystem::path to QString
I am currently working with QPixmap to set an image to a label, but improvising a way around since my qrc file isn't working. I am trying to access the image folder in the project directory and trying ...
- reputation score 27
Score of 0
0 answers
141 views
Can std::(weakly)canonical return an error for existing directory absolute path?
Based on cppreference, I was under impression that std::canonical and std::weakly_canonical return the input path if it is an absolute directory path to existing directory that has no dot, dot-dot ...
- reputation score 25740
Score of 3
1 answer
219 views
Is it possible to access std::filesystem::path components as views / without copying?
When using std::filesystem::{recursive_}directory_iterator, it's common to want to filter the results based on some pattern. I typically implement it something like:
template <typename ...
- reputation score 53
Score of 8
0 answers
684 views
Is there a safe way to create directories with std::filesystem?
I have compared the description of POSIX mkdir against
the description of std::filesystem::create_directory,
the specification draft for std::filesystem::create_directory, and
the specification draft ...
- reputation score 5543
Score of 1
1 answer
132 views
Can std::filesystem::path::wstring() modify errno?
I have a function that reports errno errors:
void reportError(int err, const std::wstring& fname);
The pattern of invocation goes like this:
int fd = open(fileName.c_str(), O_RDONLY);
if (...
- reputation score 14558
Score of 26
2 answers
2112 views
When is p.stem() + p.extension() != p.filename()?
In the std::filesystem::path::extension() page on cppreference.com, it says the following:
On a non-POSIX system, it is possible that p.stem() + p.extension() != p.filename() even though generic-...
- reputation score 373
Score of 3
0 answers
143 views
Why does std::filesystem::relative_path() only sometimes return empty strings for nonexistent paths?
I'm trying to use the C++ filesystem API to figure out if some paths are relative to the current directory or not. I thought I might be able to use the std::filesystem::relative() API but it's giving ...
- reputation score 1215
Score of 0
1 answer
134 views
Change c++ filesystem exception language
How can I change the language on which std::filesystem::filesystem_error creates message?
By default it creates message on my native language and when I try to output it to console - it messes up the ...
- reputation score 35
Score of -2
1 answer
582 views
build problem with cmake C++ boost::filesystem and CMP0167
I stumbled over a boost related problem when building with cmake (in Msys2).
a bit of history:
It started with a tool I developed in linux and now I want to build it also in msys for windows.
Here I ...
- reputation score 376
Score of 1
0 answers
167 views
Checking existence of multiple files with std:filesystem::exists is faster than using a set of file names with std::filesystem::directory_iterator?
I want to know if checking multiples files in a directory using a std::unordered_set of files names using std::filesystem::directory_iterator is faster than using std::filesystem::exists. There's some ...
- reputation score 44
Score of 0
1 answer
173 views
std::filesystem::path in a Linux/POSIX environment: root_drive vs root_directory vs root_path
Given an instance of std::filesytem::path in a Linux environment, what exactly do the root_name, root_directory, and root_path methods return?
I understand that in the Linux/POSIX environment, the UNC ...
- reputation score 29
Score of 1
1 answer
258 views
std::filesystem::canonical converts the mapped network drive to network path
For the below code:
std::error_code ec;
auto long_path = std::filesystem::canonical("W:\\31\\arawat.fielsystem_default_check\\matlab\\check_std\\check_std\\").string();
I am getting the ...
- reputation score 51
Score of 1
2 answers
155 views
Use of `std::variant` to select types after command prompt input, is that even possible?
I am at a very early stage in writing a C++ program replicating the most basic functions of the ls bash command.
I use the <filesystem> header.
The std::filesystem::directory_iterator and std::...
- reputation score 1664
