CreateFile CREATE_NEW equivalent on linux

c++, createfile, linux

Solution

Take a look at the `open()` manpage, the combination of `O_CREAT` and `O_EXCL` is what you are looking for.

Example:

mode_t perms = S_IRWXU; // Pick appropriate permissions for the new file.
int fd = open("file", O_CREAT|O_EXCL, perms);
if (fd >= 0) {
    // File successfully created.
} else {
    // Error occurred. Examine errno to find the reason.
}

Problem

I wrote a method which tries to create a file. However I set the flag CREATE_NEW so it can only create it when it doesnt exist. It looks like this: ``` for (;;) { handle_ = CreateFileA(filePath.c_str(), 0, 0, NULL, CREATE_NEW, FILE_ATTRIBUTE_HIDDEN | FILE_FLAG_DELETE_ON_CLOSE, NULL); if (handle_ != INVALID_HANDLE_VALUE) break; boost::this_thread::sleep(boost::posix_time::millisec(10)); } ``` This works as it should. Now I want to port it to linux and and of course the CreateFile function are only for windows. So I am looking for something equivalent to this but on linux. I already looked at open() but I cant seem to find a flag that works like CREATE_NEW. Does anyone know a solution for this?

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