[time] Add the sleep command
[gpxe.git] / src / hci / commands / time_cmd.c
index 9866ab9..947410e 100644 (file)
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * March-19-2009 @ 02:44: Added sleep command.
+ * Shao Miller <shao.miller@yrdsb.edu.on.ca>.
  */
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 #include <gpxe/command.h>
+#include <gpxe/nap.h>
 #include <gpxe/timer.h>
 
 static int time_exec ( int argc, char **argv ) {
@@ -52,3 +57,28 @@ struct command time_command __command = {
        .exec = time_exec,
 };
 
+static int sleep_exec ( int argc, char **argv ) {
+       unsigned long start, delay;
+
+       if ( argc == 1 ||
+            !strcmp ( argv[1], "--help" ) ||
+            !strcmp ( argv[1], "-h" ))
+       {
+               printf ( "Usage:\n"
+                        "  %s <seconds>\n"
+                        "\n"
+                        "Sleep for <seconds> seconds\n",
+                        argv[0] );
+               return 1;
+       }
+       start = currticks();
+       delay = strtoul ( argv[1], NULL, 0 ) * ticks_per_sec();
+       while ( ( currticks() - start ) <= delay )
+               cpu_nap();
+       return 0;
+}
+
+struct command sleep_command __command = {
+       .name = "sleep",
+       .exec = sleep_exec,
+};