X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=kitten%2Fkernel%2Flinux_syscalls%2Fnanosleep.c;fp=kitten%2Fkernel%2Flinux_syscalls%2Fnanosleep.c;h=39c7a83aaa72ce6575586b3a5eb63fc463471b95;hb=66a1a4c7a9edcd7d8bc207aca093d694a6e6b5b2;hp=0000000000000000000000000000000000000000;hpb=f7cf9c19ecb0a589dd45ae0d2c91814bd3c2acc2;p=palacios-OLD.git

diff --git a/kitten/kernel/linux_syscalls/nanosleep.c b/kitten/kernel/linux_syscalls/nanosleep.c
new file mode 100644
index 0000000..39c7a83
--- /dev/null
+++ b/kitten/kernel/linux_syscalls/nanosleep.c
@@ -0,0 +1,30 @@
+#include <lwk/kernel.h>
+#include <lwk/time.h>
+#include <lwk/timer.h>
+#include <arch/uaccess.h>
+
+int
+sys_nanosleep(const struct timespec __user *req, struct timespec __user *rem)
+{
+	struct timespec _req, _rem;
+	uint64_t when, remain;
+
+	if (copy_from_user(&_req, req, sizeof(_req)))
+		return -EFAULT;
+
+	if (!timespec_is_valid(&_req))
+		return -EINVAL;
+
+	when = get_time() + (_req.tv_sec * NSEC_PER_SEC) + _req.tv_nsec;
+	remain = timer_sleep_until(when);
+
+	if (remain && rem) {
+		_rem.tv_sec  = remain / NSEC_PER_SEC;
+		_rem.tv_nsec = remain % NSEC_PER_SEC;
+
+		if (copy_to_user(rem, &_rem, sizeof(_rem)))
+			return -EFAULT;
+	}
+
+	return (remain) ? -ERESTART_RESTARTBLOCK : 0;
+}