summaryrefslogtreecommitdiffstats
path: root/lib/util/nanosleep.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--lib/util/nanosleep.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/lib/util/nanosleep.c b/lib/util/nanosleep.c
new file mode 100644
index 0000000..7c09b5b
--- /dev/null
+++ b/lib/util/nanosleep.c
@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2009-2011, 2013, 2017-2018 Todd C. Miller <Todd.Miller@sudo.ws>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * This is an open source non-commercial project. Dear PVS-Studio, please check it.
+ * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+ */
+
+#include <config.h>
+
+#ifndef HAVE_NANOSLEEP
+
+#include <sys/types.h>
+#include <sys/time.h>
+#ifdef HAVE_SYS_SELECT_H
+#include <sys/select.h>
+#endif /* HAVE_SYS_SELECT_H */
+#include <time.h>
+#include <errno.h>
+
+#include "sudo_compat.h"
+#include "sudo_util.h"
+
+int
+sudo_nanosleep(const struct timespec *ts, struct timespec *rts)
+{
+ struct timeval timeout, endtime, now;
+ int rval;
+
+ if (ts->tv_sec == 0 && ts->tv_nsec < 1000) {
+ timeout.tv_sec = 0;
+ timeout.tv_usec = 1;
+ } else {
+ TIMESPEC_TO_TIMEVAL(&timeout, ts);
+ }
+ if (rts != NULL) {
+ if (gettimeofday(&endtime, NULL) == -1)
+ return -1;
+ sudo_timevaladd(&endtime, &timeout, &endtime);
+ }
+ rval = select(0, NULL, NULL, NULL, &timeout);
+ if (rts != NULL && rval == -1 && errno == EINTR) {
+ if (gettimeofday(&now, NULL) == -1)
+ return -1;
+ sudo_timevalsub(&endtime, &now, &endtime);
+ TIMEVAL_TO_TIMESPEC(&endtime, rts);
+ }
+ return rval;
+}
+#endif /* HAVE_NANOSLEEP */