add container init pid with the lxc-info command

src/lxc/lxc_info.c

@@ -21,17 +21,32 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 #include <stdio.h>
+#include <stdbool.h>
 #include <unistd.h>
 #include <libgen.h>
 #include <sys/types.h>
 
 #include <lxc/lxc.h>
 #include <lxc/log.h>
-
+#include <commands.h>
 #include "arguments.h"
 
+static bool state;
+static bool pid;
+
+static int my_parser(struct lxc_arguments* args, int c, char* arg)
+{
+	switch (c) {
+	case 's': state = true; break;
+	case 'p': pid = true; break;
+	}
+	return 0;
+}
+
 static const struct option my_longopts[] = {
-	LXC_COMMON_OPTIONS
+	{"state", no_argument, 0, 's'},
+	{"pid", no_argument, 0, 'p'},
+	LXC_COMMON_OPTIONS,
 };
 
 static struct lxc_arguments my_args = {
@@ -39,18 +54,20 @@ static struct lxc_arguments my_args = {
 	.help     = "\
 --name=NAME\n\
 \n\
-lxc-info display the state of a container with the identifier NAME\n\
+lxc-info display some information about a container with the identifier NAME\n\
 \n\
 Options :\n\
-  -n, --name=NAME   NAME for name of the container\n",
+  -n, --name=NAME   NAME for name of the container\n\
+  -s, --state       shows the state of the container\n\
+  -p, --pid         shows the process id of the init container\n",
 	.options  = my_longopts,
-	.parser   = NULL,
+	.parser   = my_parser,
 	.checker  = NULL,
 };
 
 int main(int argc, char *argv[])
 {
-	int ret, state;
+	int ret;
 
 	ret = lxc_arguments_parse(&my_args, argc, argv);
 	if (ret)
@@ -60,11 +77,19 @@ int main(int argc, char *argv[])
 			 my_args.progname, my_args.quiet))
 		return 1;
 
-	state = lxc_getstate(my_args.name);
-	if (state < 0)
+	if (!state && !pid)
+		state = pid = true;
+
+	if (state) {
+		ret = lxc_getstate(my_args.name);
+		if (ret < 0)
 			return 1;
 
-	printf("'%s' is %s\n", my_args.name, lxc_state2str(state));
+		printf("state:%10s\n", lxc_state2str(ret));
+	}
+
+	if (pid)
+		printf("pid:%10d\n", get_init_pid(my_args.name));
 
 	return 0;
 }