Re: [Bug-tar] compare problems with truncated filenames

[Sergey Poznyakoff]

"Dr. Jürgen Vollmer"    <address@hidden> wrote:

> /usr/local/bin/tar: 
> lvm-snapshot/snapshots/joergli/hourly.0/joergli/lvm-snapshot/vollmer/ba/wi.wu-wien.ac.at/wi-folien/kap_01/pdf/kap01_pdf.zip:
>  
> file name too long to be stored in a GNU multivolume header, truncated

Yes, it used to be fatal error, but was changed to warning some time
ago.
 
> /usr/local/bin/tar: 
> `lvm-snapshot/snapshots/joergli/hourly.0/joergli/lvm-snapshot/vollmer/ba/wi.wu-wien.ac.at/wi-folien/kap_01/pdf/kap01_pdf.zip'
>  
> is not continued on this volume
[...]
> What can be done? 

Please try this patch:

Index: src/buffer.c
===================================================================
RCS file: /cvsroot/tar/tar/src/buffer.c,v
retrieving revision 1.98
diff -p -u -r1.98 buffer.c
--- src/buffer.c        2 May 2006 16:32:40 -0000       1.98
+++ src/buffer.c        2 May 2006 18:35:49 -0000
@@ -1151,9 +1151,16 @@ try_new_volume ()
       if (!continued_file_name
          || strcmp (continued_file_name, real_s_name))
        {
-         WARN ((0, 0, _("%s is not continued on this volume"),
-                quote (real_s_name)));
-         return false;
+         if (strlen (real_s_name) >= NAME_FIELD_SIZE
+             && strncmp (continued_file_name, real_s_name, NAME_FIELD_SIZE) == 
0)
+           WARN ((0, 0, _("%s is possibly continued on this volume: header 
contains truncated name"),
+                  quote (real_s_name)));
+         else
+           {
+             WARN ((0, 0, _("%s is not continued on this volume"),
+                    quote (real_s_name)));
+             return false;
+           }
        }
 
       s = continued_file_size + continued_file_offset;


Regards,
Sergey