Add overlay_root config option. Opkg checks this location for available space.

This option is useful in the case where root is mounted ro, and another rw
filesystem is overlaid on top with e.g. mini_fo.

From Nicolas Thill via OpenWrt.

git-svn-id: http://opkg.googlecode.com/svn/trunk@601 e8e0d7a0-c8d9-11dd-a880-a1081c7ac358

diff --git a/libopkg/opkg_conf.c b/libopkg/opkg_conf.c
index acac1b49894d7e92b1baf2f6aaf283460f9d3cc7..864d2ac30992c43a6b9478dbd93acdb6b929f391 100644 (file)
--- a/libopkg/opkg_conf.c
+++ b/libopkg/opkg_conf.c
@@ -63,6 +63,7 @@ opkg_option_t options[] = {
          { "download_only", OPKG_OPT_TYPE_BOOL, &_conf.download_only },
          { "nodeps", OPKG_OPT_TYPE_BOOL, &_conf.nodeps },
          { "offline_root", OPKG_OPT_TYPE_STRING, &_conf.offline_root },
+         { "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 },

diff --git a/libopkg/opkg_conf.h b/libopkg/opkg_conf.h
index af6b9ab21cab6c9e5f828800f7cd7b52df99cdb4..0340ff29061681a542c9156dbc83386474d4cf30 100644 (file)
--- a/libopkg/opkg_conf.h
+++ b/libopkg/opkg_conf.h
@@ -79,6 +79,7 @@ struct opkg_conf
      int check_signature;
      int nodeps; /* do not follow dependencies */
      char *offline_root;
+     char *overlay_root;
      int query_all;
      int verbosity;
      int noaction;

diff --git a/libopkg/opkg_install.c b/libopkg/opkg_install.c
index 783887509fad84d7b92786fb1f87e9f475ce19f5..74a2ce115a62e8496baaa2d3af1c3e57890f1705 100644 (file)
--- a/libopkg/opkg_install.c
+++ b/libopkg/opkg_install.c
@@ -21,6 +21,7 @@
 #include <time.h>
 #include <signal.h>
 #include <unistd.h>
+#include <sys/stat.h>
 
 #include "pkg.h"
 #include "pkg_hash.h"
@@ -192,13 +193,24 @@ static int
 verify_pkg_installable(pkg_t *pkg)
 {
        unsigned long kbs_available, pkg_size_kbs;
-       char *root_dir;
+       char *root_dir = NULL;
+       struct stat s;
 
        if (conf->force_space || pkg->installed_size == 0)
                return 0;
 
-       root_dir = pkg->dest ? pkg->dest->root_dir :
-                                               conf->default_dest->root_dir;
+       if (pkg->dest)
+       {
+               if (!strcmp(pkg->dest->name, "root") && conf->overlay_root
+                   && !stat(conf->overlay_root, &s) && (s.st_mode & S_IFDIR))
+                       root_dir = conf->overlay_root;
+               else
+                       root_dir = pkg->dest->root_dir;
+       }
+
+       if (!root_dir)
+               root_dir = conf->default_dest->root_dir;
+
        kbs_available = get_available_kbytes(root_dir);
 
        pkg_size_kbs = (pkg->installed_size + 1023)/1024;