[svn-r15669] Purpose: Add feature requested in bug #1282

Description: Adds capability to h5ls to traverse external links when the -r
(recursive) option is given.  Changes to the way absolute path names are patched
in h5trav.c.  Changes to the way recursive traversal starting from a non-root
group is handled (which also fixes some preexisting issues).  Tests added for
these cases.

Tested: kagiso, smirom, linew (h5committest)

1 files changed, 12 insertions, 3 deletions

diff --git a/tools/lib/h5trav.c b/tools/lib/h5trav.c
index bb8014d..69b4512 100644
--- a/tools/lib/h5trav.c
+++ b/tools/lib/h5trav.c
@@ -40,6 +40,8 @@ typedef struct {
     trav_addr_t *seen;              /* List of addresses seen already */
     const trav_visitor_t *visitor;  /* Information for visiting each link/object */
     hbool_t is_absolute;            /* Whether the traversal has absolute paths */
+    const char *base_grp_name;      /* Name of the group that serves as the base
+                                     * for iteration */
 } trav_ud_traverse_t;
 
 typedef struct {
@@ -146,9 +148,15 @@ traverse_cb(hid_t loc_id, const char *path, const H5L_info_t *linfo,
 
     /* Create the full path name for the link */
     if(udata->is_absolute) {
-        new_name = HDmalloc(HDstrlen(path) + 2);
-        *new_name = '/';
-        HDstrcpy(new_name + 1, path);
+        size_t base_len = HDstrlen(udata->base_grp_name);
+        size_t add_slash = base_len ? ((udata->base_grp_name)[base_len-1] != '/') : 1;
+            
+        if(NULL == (new_name = HDmalloc(base_len + add_slash + HDstrlen(path) + 1)))
+            return(H5_ITER_ERROR);
+        HDstrcpy(new_name, udata->base_grp_name);
+        if (add_slash)
+            new_name[base_len] = '/';
+        HDstrcpy(new_name + base_len + add_slash, path);
         full_name = new_name;
     } /* end if */
     else
@@ -242,6 +250,7 @@ traverse(hid_t file_id, const char *grp_name, hbool_t visit_start,
         udata.seen = &seen;
         udata.visitor = visitor;
         udata.is_absolute = (*grp_name == '/');
+        udata.base_grp_name = grp_name;
 
         /* Check for iteration of links vs. visiting all links recursively */
         if(recurse) {