save the config file in the statefile directory

Save the configuration file in the statefile directory so it
can be re-created at restart time.

Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>

diff --git a/src/lxc/lxc_checkpoint.c b/src/lxc/lxc_checkpoint.c
index feac55dd9fe18429a708b6b5715a33cd9865baae..0ca35fb934eee89cf3ecb7564400906520706944 100644 (file)
--- a/src/lxc/lxc_checkpoint.c
+++ b/src/lxc/lxc_checkpoint.c
@@ -20,7 +20,9 @@
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
+#define _GNU_SOURCE
 #include <stdio.h>
+#include <stdlib.h>
 #include <libgen.h>
 #include <unistd.h>
 #include <sys/types.h>
@@ -77,6 +79,37 @@ Options :\n\
        .rcfile   = NULL,
 };
 
+static int save_config_file(const char *name, const char *dir)
+{
+       char *src, *dst;
+       int ret;
+
+       if (!asprintf(&src, LXCPATH "/%s/config", name)) {
+               ERROR("failed to allocate memory");
+               return -1;
+       }
+
+       if (access(src, F_OK)) {
+               free(src);
+               return 0;
+       }
+
+       if (!asprintf(&dst, "%s/config", dir)) {
+               ERROR("failed to allocate memory");
+               free(src);
+               return -1;
+       }
+
+       ret = lxc_copy_file(src, dst);
+       if (ret)
+               ERROR("failed to copy '%s' to '%s'", src, dst);
+
+       free(src);
+       free(dst);
+
+       return ret;
+}
+
 int main(int argc, char *argv[])
 {
        int ret = -1;
@@ -90,6 +123,12 @@ int main(int argc, char *argv[])
        if (ret)
                return ret;
 
+       ret = save_config_file(my_args.name, my_args.statefile);
+       if (ret) {
+               ERROR("failed to save the configuration");
+               return ret;
+       }
+
        ret = lxc_checkpoint(my_args.name, -1, 0);
        if (ret) {
                ERROR("failed to checkpoint '%s'", my_args.name);