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Full Discussion: Dealing with white spaces in bash scripts
Top Forums Shell Programming and Scripting Dealing with white spaces in bash scripts Post 302781519 by alister on Saturday 16th of March 2013 08:47:41 PM
Old 03-16-2013
Quote:
Originally Posted by venmx
And due to the nature of the find command, I had to expand it into 3 parts ... <snip> ...
Code:
#!/bin/sh

find /dump -type f -gid 200 |
while read i; do
  chgrp `ls -ln "${i}" | awk '{print $3}'` "${i}"
done

find /dump -type d -gid 200 |
while read i; do
  chgrp `ls -lnd "${i}" | awk '{print $3}'` "${i}"
done

find /dump -type l -gid 200 |
while read i; do
  chgrp -h `ls -lnd "${i}" | awk '{print $3}'` "${i}"
done

There's no reason to resort to three different traversals of /dump. Regular files, directories, and softlinks can be visited and modified simultaneously:
Code:
find /dump -gid 200 \( -type f -o -type d -o -type l \) |
while read i; do
  chgrp -h `ls -lnd "${i}" | awk '{print $3}'` "${i}"
done

If you only need to support GNU tools (I'm making the assumption that you're using GNU find), a simpler, more efficient solution presents itself:
Code:
find /dump -gid 200 \( -type f -o -type d -o -type l \) -printf '%U:%p\n' |
while IFS=: read -r uid fname; do
  chgrp -h "$uid" "$i"
done

Regards,
Alister
 

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LEARN ABOUT DEBIAN

setuidgid

setuidgid(8)						      System Manager's Manual						      setuidgid(8)

NAME

       setuidgid - runs another program under a specified account's uid and gid.

SYNOPSIS

       setuidgid account child

DESCRIPTION

       account is a single argument.  child consists of one or more arguments.

       setuidgid sets its uid and gid to account's uid and gid, removing all supplementary groups. It then runs child.

       setuidgid cannot be run by anyone other than root.

EXIT CODES

       setuidgid  exits  111  if it cannot find a UNIX account named account, if it cannot setgid, if it cannot setuid, or if it cannot run child.
       Otherwise its exit code is the same as that of child.

SEE ALSO

       supervise(8), svc(8), svok(8), svstat(8), svscanboot(8),  svscan(8),  readproctitle(8),	fghack(8),  pgrphack(8),  multilog(8),	tai64n(8),
       tai64nlocal(8), envuidgid(8), envdir(8), softlimit(8), setlock(8)

       http://cr.yp.to/daemontools.html

																      setuidgid(8)
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