76 lines
2.5 KiB
C
76 lines
2.5 KiB
C
/*
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* Copyright 2000 Massachusetts Institute of Technology
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*
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* Permission to use, copy, modify, and distribute this software and
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* its documentation for any purpose and without fee is hereby
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* granted, provided that both the above copyright notice and this
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* permission notice appear in all copies, that both the above
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* copyright notice and this permission notice appear in all
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* supporting documentation, and that the name of M.I.T. not be used
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* in advertising or publicity pertaining to distribution of the
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* software without specific, written prior permission. M.I.T. makes
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* no representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied
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* warranty.
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*
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* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
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* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
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* SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "namespace.h"
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#include <sys/select.h>
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#include <sys/time.h>
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#include <errno.h>
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#include <signal.h>
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#include "un-namespace.h"
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/*
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* Emulate the POSIX 1003.1g-2000 `pselect' interface. This is the
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* same as the traditional BSD `select' function, except that it uses
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* a timespec rather than a timeval, doesn't modify the timeout argument,
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* and allows the user to specify a signal mask to apply during the select.
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*/
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int
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pselect(int count, fd_set *rfds, fd_set *wfds, fd_set *efds,
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const struct timespec *timo, const sigset_t *mask)
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{
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sigset_t omask;
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struct timeval tvtimo, *tvp;
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int rv, sverrno;
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if (timo) {
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TIMESPEC_TO_TIMEVAL(&tvtimo, timo);
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tvp = &tvtimo;
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} else
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tvp = 0;
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if (mask != 0) {
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rv = _sigprocmask(SIG_SETMASK, mask, &omask);
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if (rv != 0)
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return rv;
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}
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rv = _select(count, rfds, wfds, efds, tvp);
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if (mask != 0) {
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sverrno = errno;
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_sigprocmask(SIG_SETMASK, &omask, (sigset_t *)0);
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errno = sverrno;
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}
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return rv;
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}
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