openwrt/package/opkg/patches/003-fs_overlay_support.patch

This patch adds a new configuration option (overlay_root) specifying 
what mount point opkg should check for available storage space.

Signed-off-by: Nicolas Thill <nico@openwrt.org>


--- a/libopkg/opkg_conf.c
+++ b/libopkg/opkg_conf.c
@@ -72,6 +72,7 @@
 	  { "offline_root_path", OPKG_OPT_TYPE_STRING, &conf->offline_root_path },
 	  { "offline_root_post_script_cmd", OPKG_OPT_TYPE_STRING, &conf->offline_root_post_script_cmd },
 	  { "offline_root_pre_script_cmd", OPKG_OPT_TYPE_STRING, &conf->offline_root_pre_script_cmd },
+	  { "overlay_root", OPKG_OPT_TYPE_STRING, &conf->overlay_root },
 	  { "proxy_passwd", OPKG_OPT_TYPE_STRING, &conf->proxy_passwd },
 	  { "proxy_user", OPKG_OPT_TYPE_STRING, &conf->proxy_user },
 	  { "query-all", OPKG_OPT_TYPE_BOOL, &conf->query_all },
--- a/libopkg/opkg_conf.h
+++ b/libopkg/opkg_conf.h
@@ -70,6 +70,7 @@
      char *offline_root_path;
      char *offline_root_pre_script_cmd;
      char *offline_root_post_script_cmd;
+     char *overlay_root;
      int query_all;
      int verbosity;
      int noaction;
--- a/libopkg/opkg_install.c
+++ b/libopkg/opkg_install.c
@@ -470,12 +470,15 @@
      *    my diddling with the .opk file size below isn't going to cut it.
      * 3) return a proper error code instead of 1
      */
-     int comp_size, blocks_available;
+     int comp_size, blocks_available = -1;
      char *root_dir;
     
      if (!conf->force_space && pkg->installed_size != NULL) {
           root_dir = pkg->dest ? pkg->dest->root_dir : conf->default_dest->root_dir;
-	  blocks_available = get_available_blocks(root_dir);
+	  if (conf->overlay_root != NULL)
+		blocks_available = get_available_blocks(conf->overlay_root);
+	  if (blocks_available < 0)
+		blocks_available = get_available_blocks(root_dir);
 
 	  comp_size = strtoul(pkg->installed_size, NULL, 0);
 	  /* round up a blocks count without doing fancy-but-slow casting jazz */ 
--- a/libopkg/opkg_utils.c
+++ b/libopkg/opkg_utils.c
@@ -31,10 +31,8 @@
 {
     struct statfs sfs;
 
-    if(statfs(filesystem, &sfs)){
-        fprintf(stderr, "bad statfs\n");
-        return 0;
-    }
+    if(statfs(filesystem, &sfs))
+        return -1;
     /*    fprintf(stderr, "reported fs type %x\n", sfs.f_type); */
 
     // Actually ((sfs.f_bavail * sfs.f_bsize) / 1024)