This io_vfprintf function returns the format string for the specified file descriptor.
When a user-supplied format string is passed to this function, the file descriptor is passed through to the format string, with the result being the same as if the user had passed the file descriptor directly. This results in the format string being ignored by formats that do not take a file descriptor.
This function is not thread-safe: It can only be called by one thread at a time, and at any given time only that thread will be running it.
_io_vfprintf_internal (s, format,…
io_fputs, io_fputs_chunk, io_fputs_all: When a user-supplied format string is passed to this function, the file descriptor is passed through to the format string, with the result being the same as if the user had passed the file descriptor directly. This results in the format string being ignored by formats that do not take a file descriptor.
This is a good example of how to avoid a race condition that would normally prevent your code from working. When a thread calls this function, all threads are blocked and all threads in the program will run at the same time. Since the format string is passed to this function, it will end up being passed across all threads in the program, so the thread calling this function will get the format string through all of them.
This is a great example of the behavior of format strings. To pass a format string to a function, you need to use a format string with the format string and an argument to this function.
In this case, all threads in the program will run at the same time, since this function is called by all threads. But when this function is called, the thread calling this function will get the format string through all of the threads, which is why the thread calling this function gets the format string through all of the threads.
That’s a lot of format specifiers. The most important of these is _s, which is a string specifying the format string. Here, _s is the size of the string.
So, the format string is passed through all of the threads. Now, if you’re using C++, you can probably figure out how to make this work without any format strings, but if you’re using C, you’ll probably need to use a format specifier to get this whole string thing going.
