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@node accept4
@subsection @code{accept4}
@findex accept4
Documentation:@* @uref{https://www.kernel.org/doc/man-pages/online/pages/man2/accept4.2.html,,man accept4}
Gnulib module: accept4
Portability problems fixed by Gnulib:
@itemize
@item
This function is missing on many non-glibc platforms:
glibc 2.9, macOS 11.1, FreeBSD 6.0, NetBSD 7.1, OpenBSD 3.8, Minix 3.1.8, AIX 5.1, HP-UX 11, IRIX 6.5, Solaris 11.3, Cygwin 1.7.1, mingw, MSVC 14, Android 4.4.
But the replacement function is not atomic; this matters in multi-threaded
programs that spawn child processes.
@end itemize
Portability problems not fixed by Gnulib:
@itemize
@item
SOCK_CLOEXEC and SOCK_NONBLOCK may not be defined
as they're also significant to the socket() function.
@end itemize
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