Re: links broken during a backup (not restore), need more info on how they work to fix & file bug with vendor

[Igor Peshansky <pechtcha@cs.nyu.edu>]

On Fri, 16 May 2008, vapid wrote:

> Thank you for the quick response Igor.
>
> > You need to use "attrib +R" on .lnk files and "attrib +S" on the
> > plain-text links.
>
> I swear I tried attrib +R on both types of links earlier, but I must
> have only tried the plain-text ones.  It does fix the .lnk's as you
> said.  I'm using these two [slow] commands to fix up my system.
>
> find / \( -name cygdrive -o -name proc -o -name dev \) -prune -o -name \*.lnk -print -exec bash -c 'attrib +R "`cygpath -d \"{}\"`"' \;
> find / \( -name cygdrive -o -name proc -o -name dev \) -prune -o -type f -exec bash -c 'grep "^\\!<symlink>" "{}" && attrib +S "`cygpath -d \"{}\"`" ' \;
>
> They scan through the cygwin root and any disks you have explicitly
> mounted.  I don't think it would actually hurt stuff on the windows side
> of the disk, but I am trying to stay out of those directories.  I'm
> fairly certain the second one is safe everywhere, but the first one
> may +R some non-cygwin links, if you have mounted windows directories.
> This doesn't seem to affect windows; the shortcut still work in explorer.
> The windows created shortcuts don't seem to work in bash with or without
> the +R, which is fine with me.
>
> Maybe someone can come up with a fancier find.  I had to spawn a bash to
> use the && and delay the evaluation of the `cygpath {}`.  There's a lot of
> quoting to deal with spaces in filenames.

You're spawning way too many processes here (though you do have to run one
attrib per file).  I'd go with something like this:

find / \( -name cygdrive -o -name proc -o -name dev \) -prune -o \
       -name \*.lnk -print | \
  cygpath -w -f - | perl -pe 's,\n,\0,' | \
  xargs -tr0 -n1 attrib +R

find / -mindepth 1 -maxdepth 1 \
       \! -name cygdrive \! -name proc \! -name dev -print0 | \
  xargs -r0 grep -lRF '^!<symlink>' | \
  cygpath -w -f - | perl -pe 's,\n,\0,' | \
  xargs -tr0 -n1 attrib +S

(not tested, but should work barring typos).
HTH,
	Igor
-- 
				http://cs.nyu.edu/~pechtcha/
      |\      _,,,---,,_	    pechtcha@cs.nyu.edu | igor@watson.ibm.com
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