libposix: sleep and pipe

sys/include/posix.h

@@ -59,6 +59,8 @@ extern void * POSIX_malloc(int *errnop, size_t size);
 extern void *POSIX_realloc(int *errnop, void *ptr, size_t size);
 extern void *POSIX_calloc(int *errnop, size_t nelem, size_t size);
 extern void POSIX_free(void *ptr);
+extern unsigned int POSIX_sleep(unsigned int seconds);
+extern int POSIX_pipe(int *errnop, int fildes[2]);
 
 /* Library initialization
  */

sys/src/lib/posix/files.c

@@ -97,6 +97,16 @@ find_seek_type(int whence)
 	return -1;
 }
 
+int
+POSIX_pipe(int *errnop, int fildes[2])
+{
+	int res;
+	res = jehanne_pipe(fildes);
+	if(res == -1)
+		*errnop = __libposix_get_errno(PosixEMFILE);
+	return res;
+}
+
 int
 POSIX_open(int *errnop, const char *name, int flags, int mode)
 {

sys/src/lib/posix/others.c

@@ -41,6 +41,13 @@ POSIX_isatty(int *errnop, int fd)
 	return 0;
 }
 
+unsigned int
+POSIX_sleep(unsigned int seconds)
+{
+	sleep(seconds*1000);
+	return 0;
+}
+
 clock_t
 POSIX_times(int *errnop, void *buf)
 {