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10.428 getpeername

POSIX specification:
https://pubs.opengroup.org/onlinepubs/9699919799/functions/getpeername.html

Gnulib module: getpeername

Portability problems fixed by Gnulib:

• On Windows platforms (excluding Cygwin), error codes from this function are not placed in errno, and WSAGetLastError must be used instead.
• On HP-UX 11, in 64-bit mode, when the macro _HPUX_ALT_XOPEN_SOCKET_API is not defined, this function behaves incorrectly because it is declared to take a pointer to a 64-bit wide socklen_t entity but in fact considers it as a pointer to a 32-bit wide unsigned int entity.

Portability problems not fixed by Gnulib:

• Some platforms don’t have a socklen_t type; in this case this function’s third argument type is ‘int *’.