Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 61 insertions, 0 deletions

diff --git a/lib/util/select.c b/lib/util/select.c
new file mode 100644
index 0000000..dc79a27
--- /dev/null
+++ b/lib/util/select.c
@@ -0,0 +1,61 @@
+/*
+   Unix SMB/Netbios implementation.
+   Version 3.0
+   Samba select/poll implementation
+   Copyright (C) Andrew Tridgell 1992-1998
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "replace.h"
+#include "system/filesys.h"
+#include "system/select.h"
+#include "lib/util/select.h"
+#include "lib/util/time.h"
+
+int sys_poll_intr(struct pollfd *fds, int num_fds, int timeout)
+{
+	int orig_timeout = timeout;
+	struct timespec start;
+	int ret;
+
+	clock_gettime_mono(&start);
+
+	while (true) {
+		struct timespec now;
+		int64_t elapsed;
+
+		ret = poll(fds, num_fds, timeout);
+		if (ret != -1) {
+			break;
+		}
+		if (errno != EINTR) {
+			break;
+		}
+		/* Infinite timeout, no need to adjust. */
+		if (timeout < 0) {
+			continue;
+		}
+		clock_gettime_mono(&now);
+		elapsed = nsec_time_diff(&now, &start) / 1000000;
+		timeout = orig_timeout - elapsed;
+		/* Unlikely, but might happen eg. when getting traced.
+		 * Make sure we're not hanging in this case.
+		 */
+		if (timeout < 0) {
+			timeout = 0;
+		}
+	};
+	return ret;
+}