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10.69.68 read ¶

POSIX specification:
https://pubs.opengroup.org/onlinepubs/9799919799/functions/read.html

Gnulib module: read, stdio-h, nonblocking

Portability problems fixed by Gnulib module read:

• This function is declared in a different header file (namely, <io.h>) on some platforms: mingw, MSVC 14.
• This function crashes when invoked with invalid arguments on some platforms: MSVC 14.

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

• 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 14.

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: macOS 14.

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