9.841 read

POSIX specification:
http://www.opengroup.org/onlinepubs/9699919799/functions/read.html

Gnulib module: stdio, nonblocking

Portability problems fixed by Gnulib module stdio, together with module nonblocking:

• This function crashes when invoked with invalid arguments on some platforms: MSVC 9.
• When reading from a non-blocking pipe whose buffer is empty, this function fails with errno being set to EINVAL instead of EAGAIN on some platforms: mingw, MSVC 9.

Portability problems not fixed by Gnulib:

• This function may fail with error EINTR, even in programs that don't install any signal handlers, on some platforms: Mac OS X 10.5.

For handling EINTR, Gnulib provides a module ‘safe-read’ with a function safe_read.