added (unfinished) nanosleep to APE

sys/include/ape/time.h

@@ -52,6 +52,12 @@ extern char *ctime_r(const time_t *, char *);
 
 #ifdef _POSIX_SOURCE
 extern void tzset(void);
+
+struct timespec {
+	time_t tv_sec;
+	long tv_nsec;
+};
+extern int nanosleep(const struct timespec *req, struct timespec *rem);
 #endif
 
 #ifdef __cplusplus

sys/src/ape/lib/ap/posix/mkfile

@@ -10,6 +10,7 @@ OFILES=\
 	sigset.$O\
 	sysconf.$O\
 	tzset.$O\
+	nanosleep.$O\
 
 </sys/src/cmd/mksyslib
 

sys/src/ape/lib/ap/posix/nanosleep.c

@@ -0,0 +1,22 @@
+#define _PLAN9_SOURCE
+#include "../plan9/lib.h"
+#include <sys/types.h>
+#include <time.h>
+#include "../plan9/sys9.h"
+
+int
+nanosleep(struct timespec *req, struct timespec *rem)
+{
+	int ms;
+
+	ms = req->tv_sec * 1000 + (req->tv_nsec + 999999) / 1000000;
+	if(_SLEEP(ms) < 0) {
+		if(rem) {
+			rem->tv_sec = rem->tv_nsec = 0; /* needs better handling */
+		}
+		return -1;
+	}
+	if(rem)
+		rem->tv_sec = rem->tv_nsec = 0;
+	return 0;
+}