Expose POSIX sleep

include/unistd.h

@@ -7,6 +7,7 @@
 #define STDERR_FILENO		2
 
 int syscall(int number, ...);
+unsigned int sleep(unsigned int seconds);
 
 #endif /* __UNISTD_H__ */
 

lib/libc/SConscript

@@ -13,11 +13,12 @@ src_common = [
     "exit.c",
     "file.c",
     "malloc.c",
+    "printf.c",
+    "process.c",
+    "posix/mman.c",
     "string.c",
     "syscall.c",
     "time.c",
-    "printf.c",
-    "posix/mman.c",
 ]
 
 src_amd64 = [

lib/libc/process.c

@@ -0,0 +1,15 @@
+
+#include <stdint.h>
+
+#include <unistd.h>
+#include <syscall.h>
+
+unsigned int
+sleep(unsigned int seconds)
+{
+    OSThreadSleep(seconds);
+
+    // Should return left over time if woke up early
+    return 0;
+}
+