Libc-320.tar.gz

[apple/libc.git] / gen / FreeBSD / pselect.c

diff --git a/gen/FreeBSD/pselect.c b/gen/FreeBSD/pselect.c
new file mode 100644 (file)
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+++ b/gen/FreeBSD/pselect.c
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+/*
+ * Copyright 2000 Massachusetts Institute of Technology
+ *
+ * Permission to use, copy, modify, and distribute this software and
+ * its documentation for any purpose and without fee is hereby
+ * granted, provided that both the above copyright notice and this
+ * permission notice appear in all copies, that both the above
+ * copyright notice and this permission notice appear in all
+ * supporting documentation, and that the name of M.I.T. not be used
+ * in advertising or publicity pertaining to distribution of the
+ * software without specific, written prior permission.  M.I.T. makes
+ * no representations about the suitability of this software for any
+ * purpose.  It is provided "as is" without express or implied
+ * warranty.
+ *
+ * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''.  M.I.T. DISCLAIMS
+ * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
+ * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD: src/lib/libc/gen/pselect.c,v 1.6 2002/10/12 16:13:37 mike Exp $");
+
+#include "namespace.h"
+#include <sys/select.h>
+#include <sys/time.h>
+
+#include <errno.h>
+#include <signal.h>
+#include "un-namespace.h"
+
+__weak_reference(__pselect, pselect);
+
+/*
+ * Emulate the POSIX 1003.1g-2000 `pselect' interface.  This is the
+ * same as the traditional BSD `select' function, except that it uses
+ * a timespec rather than a timeval, doesn't modify the timeout argument,
+ * and allows the user to specify a signal mask to apply during the select.
+ */
+int
+__pselect(int count, fd_set * __restrict rfds, fd_set * __restrict wfds, 
+       fd_set * __restrict efds, const struct timespec * __restrict timo, 
+       const sigset_t * __restrict mask)
+{
+       sigset_t omask;
+       struct timeval tvtimo, *tvp;
+       int rv, sverrno;
+
+       if (timo) {
+               TIMESPEC_TO_TIMEVAL(&tvtimo, timo);
+               tvp = &tvtimo;
+       } else
+               tvp = 0;
+
+       if (mask != 0) {
+               rv = _sigprocmask(SIG_SETMASK, mask, &omask);
+               if (rv != 0)
+                       return rv;
+       }
+
+       rv = _select(count, rfds, wfds, efds, tvp);
+       if (mask != 0) {
+               sverrno = errno;
+               _sigprocmask(SIG_SETMASK, &omask, (sigset_t *)0);
+               errno = sverrno;
+       }
+
+       return rv;
+}