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select: reject invalid file descriptors POSIX requires invalid file descriptors to be detected rather than silently ignored. FreeBSD 8.2 detects if fd 0 has been closed and appears in a set while fd 1 is still open, but mistakenly optimizes and refuses to check any fds in the set beyond the maximum open fd. * m4/select.m4 (gl_FUNC_SELECT): Probe for FreeBSD bug. * lib/select.c (rpl_select) [!win32]: Work around it. * modules/select (Depends-on): Add dup2. * doc/posix-functions/select.texi (select): Document this.
author Eric Blake <eblake@redhat.com>
date Tue, 02 Oct 2012 15:29:13 -0600
parents 588e064cc6e1
children
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Description:
select() function: synchronous I/O multiplexing.

Files:
lib/select.c
m4/select.m4

Depends-on:
sys_select
alloca          [test $REPLACE_SELECT = 1]
dup2            [test $REPLACE_SELECT = 1]
sockets         [test $REPLACE_SELECT = 1]
sys_time        [test $REPLACE_SELECT = 1]
msvc-nothrow    [test $REPLACE_SELECT = 1]

configure.ac:
gl_FUNC_SELECT
if test $REPLACE_SELECT = 1; then
  AC_LIBOBJ([select])
fi
gl_SYS_SELECT_MODULE_INDICATOR([select])

Makefile.am:

Include:
<sys/select.h>

Link:
$(LIB_SELECT)

License:
LGPLv2+

Maintainer:
Simon Josefsson