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@node tcgetsid
@section @code{tcgetsid}
@findex tcgetsid

POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/tcgetsid.html}

Gnulib module: tcgetsid

Portability problems fixed by Gnulib:
@itemize
@item
This function is missing on some platforms:
FreeBSD 6.0, OpenBSD 4.5, Minix 3.1.8, Cygwin 1.7.9, mingw, MSVC 14, Android 4.4.
@item
The declaration of this function in C++ compilation units has C++ linkage, not
C linkage, on some platforms:
HP-UX 11.00.
@end itemize

Portability problems not fixed by Gnulib:
@itemize
@item
This function always fails on some platforms:
FreeBSD 6.0, Cygwin 1.7.8, mingw, MSVC 14.
@item
This function returns int instead of pid_t on some platforms:
Cygwin 1.7.11.
@end itemize