Question:
With C++ on Linux, how does one detect block devices? Right now, I’m using this code:for (const auto &entry : std::filesystem::directory_iterator(“/dev/”))
{
std::string name = entry.path().filename().string();
if (name.find(“sd”) == 0 || name.find(“nvme”) == 0 || name.find(“hd”) == 0 || name.find(“vd”) == 0 || name.find(“xvd”) == 0)
{
std::cout << "Found device: " << entry.path() << std::endl;
}
}
[/code]
"loop", it also misses Network Block Devices because I didn’t include "nbd".Answer:
std::filesystem::directory_entry has an is_block_file() method for this exact purpose:Checks whether the pointed-to object is a block device.
For example:
for (const auto &entry : std::filesystem::directory_iterator(“/dev/”))
{
if (entry.is_block_file())
{
std::cout << "Found device: " << entry.path() << std::endl;
}
}
[/code]
If you have better answer, please add a comment about this, thank you!