[time] Add the time command

Signed-off-by: Michael Brown <mcb30@etherboot.org>

src/config/general.h

@@ -101,6 +101,7 @@
 #define DHCP_CMD		/* DHCP management commands */
 #define SANBOOT_CMD		/* SAN boot commands */
 #define LOGIN_CMD		/* Login command */
+#undef	TIME_CMD		/* Time command */
 
 /*
  * Obscure configuration options

src/core/config.c

@@ -196,6 +196,9 @@ REQUIRE_OBJECT ( sanboot_cmd );
 #ifdef LOGIN_CMD
 REQUIRE_OBJECT ( login_cmd );
 #endif
+#ifdef TIME_CMD
+REQUIRE_OBJECT ( time_cmd );
+#endif
 
 /*
  * Drag in miscellaneous objects

src/hci/commands/time_cmd.c

@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2009 Daniel Verkamp <daniel@drv.nu>.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * 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.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <gpxe/command.h>
+#include <gpxe/timer.h>
+
+static int time_exec ( int argc, char **argv ) {
+	unsigned long start;
+	int rc, secs;
+
+	if ( argc == 1 ||
+	     !strcmp ( argv[1], "--help" ) ||
+	     !strcmp ( argv[1], "-h" ) )
+	{
+		printf ( "Usage:\n"
+			 "  %s <command>\n"
+			 "\n"
+			 "Time a command\n",
+			 argv[0] );
+		return 1;
+	}
+
+	start = currticks();
+	rc = execv ( argv[1], argv + 1 );
+	secs = (currticks() - start) / ticks_per_sec();
+
+	printf ( "%s: %ds\n", argv[0], secs );
+
+	return rc;
+}
+
+struct command time_command __command = {
+	.name = "time",
+	.exec = time_exec,
+};
+