Test libc sleep and gettime in run/libc

Ref #3018

repos/libports/run/libc.run

@@ -1,4 +1,4 @@
-build "core init test/libc"
+build "core init drivers/timer test/libc"
 
 create_boot_directory
 
@@ -18,6 +18,10 @@ install_config {
 		<any-service> <parent/> <any-child/> </any-service>
 	</default-route>
 	<default caps="200"/>
+	<start name="timer">
+		<resource name="RAM" quantum="1M"/>
+		<provides> <service name="Timer"/> </provides>
+	</start>
 	<start name="test-libc">
 		<resource name="RAM" quantum="400M"/>
 		<config>
@@ -29,11 +33,10 @@ install_config {
 }
 
 build_boot_image {
-	core init test-libc
+	core init timer test-libc
 	ld.lib.so libc.lib.so vfs.lib.so libm.lib.so posix.lib.so
 }
 
 append qemu_args " -nographic  "
 
-run_genode_until "child .* exited with exit value 0.*\n" 10
-
+run_genode_until "child .* exited with exit value 0.*\n" 13

repos/libports/src/test/libc/main.cc

@@ -26,6 +26,7 @@
 #include <string.h>
 #include <errno.h>
 #include <unistd.h>
+#include <time.h>
 #include <sys/syscall.h>
 
 
@@ -148,5 +149,13 @@ int main(int argc, char **argv)
 
 	perror("perror");
 
+	struct timespec ts;
+	for (int i = 0; i < 3; ++i) {
+		sleep(1);
+		ts.tv_sec = ts.tv_nsec = 0;
+		clock_gettime(CLOCK_MONOTONIC, &ts);
+		printf("sleep/gettime: %.09f\n", ts.tv_sec + ts.tv_nsec / 1000000000.0);
+	}
+
 	exit(error_count);
 }