1 files changed, 63 insertions, 0 deletions
diff --git a/dhcpcd/compat/pollts.c b/dhcpcd/compat/pollts.c
new file mode 100644
index 00000000..232a87ea
--- /dev/null
+++ b/dhcpcd/compat/pollts.c
@@ -0,0 +1,63 @@
+/*
+ * dhcpcd - DHCP client daemon
+ * Copyright (c) 2006-2013 Roy Marples <roy@marples.name>
+ * All rights reserved
+
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS 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/time.h>
+#include <sys/types.h>
+
+#include <limits.h>
+#include <poll.h>
+#include <signal.h>
+#include <unistd.h>
+
+#include "pollts.h"
+
+#warning "This pollts(2) implementation is not entirely race condition safe."
+#warning "Only operating system support for pollts(2) can correct this."
+
+int
+pollts(struct pollfd *restrict fds, nfds_t nfds,
+    const struct timespec *restrict ts, const sigset_t *restrict sigmask)
+{
+	int r, timeout;
+	sigset_t oldset;
+
+	if (ts == NULL)
+		timeout = -1;
+	else if (ts->tv_sec > INT_MAX / 1000 ||
+	    (ts->tv_sec == INT_MAX / 1000 &&
+	    (ts->tv_nsec + 999999) / 1000000 > INT_MAX % 1000000))
+		timeout = INT_MAX;
+	else
+		timeout = ts->tv_sec * 1000 + (ts->tv_nsec + 999999) / 1000000;
+	if (sigmask && sigprocmask(SIG_SETMASK, sigmask, &oldset) == -1)
+		return -1;
+	r = poll(fds, nfds, timeout);
+	if (sigmask && sigprocmask(SIG_SETMASK, &oldset, NULL) == -1)
+		return -1;
+
+	return r;
+}