TAR : Problem with the length of the files names

[Christophe MESTDACH]

Excuse-me for my English, but I'm French.

I have a CDROM of which I would like to make an image TAR under HP-UX11.11, but TAR does not file all the files of CD.

For example, the CD-Rom contains the files :

CSCOpx\CSCOvorb\CSCOvorb_fileset\opt\CSCOpx\www\classpath\com\sun\java\swing\plaf\basic\BasicMenuUIPostAction.class

and

CSCOpx\CSCOvorb\CSCOvorb_fileset\opt\CSCOpx\www\classpath\com\sun\java\swing\plaf\basic\BasicMenuUIMenuChangeListenerSelectChildItemAction.class

File TAR contains the file "BasicMenuUIPostAction.class", but not the file "BasicMenuUIMenuChangeListenerSelectChildItemAction.class".??

That can it be with the length of the file name?

How to make?

Thank you in advance.

[Yair Goldel]

Hi
Which kind of mount you are doing ?
Try to read about "pfs_mount"

the mount procedire is :

nohup /usr/sbin/pfs_mountd &
nohup /usr/sbin/pfsd &

/usr/sbin/pfs_mount /dev/dsk/c0t0d0 /cdrom

Regards

[Enrico P.]

Hi,
the problem should not be file name length.
Check if you mounted cdrom correctly.

Enrico.

[Massimo Bianchi]

Hi,
i found these two notes in the "man tar"

Due to internal limitations in the header structure, not all file
names of fewer than 256 characters fit when using the N version key.
If a file name does not fit, tar prints a message and does not archive
the file.

Link names are still limited to 100 characters when using the N
version key.


Which options are you using to "tar" the cd ?
Your string is 132 chars..


If you have enough space, i suggest:
- copy the CD on a FS using

cd /cdrom
find .| cpio -pdmuvx /destination_file_system

- if the previous succed, do a tar of the /destination_file_system


so we can exclude problems related to the cdrom

HTH,
Massimo

[Michael Kelly_5]

Christophe,
for the structure of a tar archive see "man 4 tar".
The important items in the structure are:
name - actual name of the file (limited to 100 characters e.g. "BasicMenuUIMenuChangeListenerSelectChildItemAction.class")
prefix - path from the toplevel to the directory (limited to 155 characters e.g. "CSCOpx\CSCOvorb\CSCOvorb_fileset\opt\CSCOpx\www\classpath\com\sun\java\swing\plaf\basic")
linkname - if name is a link, this holds the target (limited to 100 characters).

As Massimo pointed out, there is a warning in the man page for tar that states that there are circumstances when tar will still fail to archive files where these limits are not exceeded.
In any case, tar WILL print a warning if it cannot archive a file due to 'structural' problems. If tar is not printing these warnings, then you have a different problem.

If you just want to archive the CD, why not just use cpio?

Hope this helps,
Michael.

[Christophe MESTDACH]

I used the commands :

- mount /dev/dsk/c0t0d0 /cdrom
- tar cvN csco.tar ./cdrom

[Massimo Bianchi]

Hi,
the problem is in the " -N " option, as printed above.

If you don't need it, don't use it.

HTH,
Massimo

[Christophe MESTDACH]

I've tryed without "-N" option and the result is the same one.

[Massimo Bianchi · Accepted solution]

Found some info.

Backup of a file with more than 100chars will fail, and no fix is planned.


Try downloading the gnutar, from http://hpux.connect.org.uk/


it has lesser limitations.


HTH,
Massimo

[Enrico P.]

Hi,
the -N option is a default option.
I have created the same path and the same file name in my server running the 11.11 and the tar command has worked well.

Enrico.