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gdoubleu
Tux's lil' helper
Joined: 07 May 2003
Posts: 80
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 Posted: Sun Apr 18, 2004 9:29 pm Post subject: symlinks and samba |
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i'm trying to copy an entire system to a newly created raid array on a new computer using samba, but am having problems getting the symlinks to copy correctly.
anyone know how to copy symlinks with samba?
i've tried setting
| Code: | | unix extensions = yes |
in my samba config file, but that doesn't seem to work
i'm trying to set up the new system rooted at /mnt/new/
the current system is mounted via smbmount at /mnt/old/
to copy, i am using | Code: | | cp -av /mnt/old/foo /mnt/new/ |
after performing the copy command, files with the same names as the symlinks exist, but they are not symlinks
what am i doing wrong here? |
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meowsqueak
Veteran
Joined: 26 Aug 2003
Posts: 1549
Location: New Zealand
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| Posted: Sun Apr 18, 2004 9:32 pm Post subject: |
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| cp -a is meant to preserve symlinks, so I can only think that samba is somehow distorting the meaning, resulting in a copy of the target file instead. Perhaps there's a samba option that influences this? |
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gdoubleu
Tux's lil' helper
Joined: 07 May 2003
Posts: 80
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| Posted: Mon Apr 19, 2004 4:10 am Post subject: |
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well, the three samba options that i could find that mention symlinks were 'unix extensions', 'follow symlinks', and 'wide links':
| Code: | unix extensions(G)
This boolean parameter controls whether Samba implments the CIFS
UNIX extensions, as defined by HP. These extensions enable
Samba to better serve UNIX CIFS clients by supporting features
such as symbolic links, hard links, etc... These extensions
require a similarly enabled client, and are of no current use to
Windows clients.
Default: unix extensions = no
follow symlinks (S)
This parameter allows the Samba administrator to stop smbd(8)
from following symbolic links in a particular share. Setting
this parameter to no prevents any file or directory that is a
symbolic link from being followed (the user will get an error).
This option is very useful to stop users from adding a symbolic
link to /etc/passwd in their home directory for instance. How-
ever it will slow filename lookups down slightly.
This option is enabled (i.e. smbd will follow symbolic links) by
default.
Default: follow symlinks = yes
wide links (S)
This parameter controls whether or not links in the UNIX file
system may be followed by the server. Links that point to areas
within the directory tree exported by the server are always
allowed; this parameter controls access only to areas that are
outside the directory tree being exported.
Note that setting this parameter can have a negative effect on
your server performance due to the extra system calls that Samba
has to do in order to perform the link checks.
Default: wide links = yes
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The 'follow symlinks' and 'wide links' options are already default to yes, and adding the 'unix extensions = yes' doesn't do the trick either. It's also not the copy function because just viewing through samba the symlinks don't show up as symlinks. |
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thm
Tux's lil' helper
Joined: 15 Dec 2003
Posts: 77
Location: Munich
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| Posted: Mon Apr 19, 2004 1:25 pm Post subject: tar may be more appropriate |
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One can spend a lot of time arguing about the behaviour of the cp utility in itself and in combination with samba. It's not very systematic in some respects. 
To reliably replicate entire file system (sub)trees, it is much better to use two instances of tar. Using tar even copies pipes and other special nodes properly. Of course, this only works if you have execute access to both machines. You could even try and pipe both instances together and aviod a large temporary file.
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Thomas |
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sven-tek
Guru
Joined: 06 May 2003
Posts: 339
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| Posted: Wed Jun 09, 2004 6:11 am Post subject: |
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| i have done this by using cpio, read the cpio manpage - i dont remeber the exact expression |
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thm
Tux's lil' helper
Joined: 15 Dec 2003
Posts: 77
Location: Munich
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| Posted: Wed Jun 09, 2004 3:42 pm Post subject: |
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| sven-tek wrote: | | i have done this by using cpio, read the cpio manpage - i dont remeber the exact expression |
tar and cpio do by and large the same thing. They differ somewhat in the optional processing they offer.
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Thomas |
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step
Apprentice
Joined: 16 May 2002
Posts: 198
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| Posted: Thu Aug 12, 2004 6:42 am Post subject: |
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i had a similar problem with symlinks
then i did this:
follow symlinks = yes
wide links = yes
unix extensions = no
and now my links work OK under linux. |
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