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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 302781493 by venmx on Saturday 16th of March 2013 05:40:57 PM
Old 03-16-2013
Wow nice, thanks Scrutinizer...

Your solution certainly does away with having to fix white spaces, which is neater.

In fact my previous solution failed because when I tried to list directories the output was "total 0" and you cannot chgrp that!

And due to the nature of the find command, I had to expand it into 3 parts. And it's probably not sensible to mess about with sed as this wouldn't account for all special characters:
Code:
#!/bin/sh

SAVEIFS=$IFS
IFS=$(echo -en "\n\b")

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

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

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

IFS=$SAVEIFS

Yours looks like:
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

 

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LEARN ABOUT NETBSD

chgrp

CHGRP(1)						    BSD General Commands Manual 						  CHGRP(1)

NAME

     chgrp -- change group

SYNOPSIS

     chgrp [-R [-H | -L | -P]] [-fhv] group file ...

DESCRIPTION

     The chgrp utility sets the group ID of the file named by each file operand to the group ID specified by the group operand.

     Options:

     -H      If the -R option is specified, symbolic links on the command line are followed.  (Symbolic links encountered in the tree traversal
	     are not followed.)

     -L      If the -R option is specified, all symbolic links are followed.

     -P      If the -R option is specified, no symbolic links are followed.

     -R      Change the group ID for the file hierarchies rooted in the files instead of just the files themselves.

     -f      The force option ignores errors, except for usage errors and doesn't query about strange modes (unless the user does not have proper
	     permissions).

     -h      If file is a symbolic link, the group of the link is changed.

     -v      Cause chgrp to be verbose, showing files as they are processed.

     If -h is not given, unless the -H or -L option is set, chgrp on a symbolic link always succeeds and has no effect.  The -H, -L and -P options
     are ignored unless the -R option is specified.  In addition, these options override each other and the command's actions are determined by
     the last one specified.

     The group operand can be either a group name from the group database, or a numeric group ID.  Since it is valid to have a group name that is
     numeric (and doesn't have the numeric ID that matches its name) the name lookup is always done first.  Preceding the ID with a ``#'' charac-
     ter will force it to be taken as a number.

     The user invoking chgrp must belong to the specified group and be the owner of the file, or be the super-user.

     Unless invoked by the super-user, chgrp clears the set-user-id and set-group-id bits on a file to prevent accidental or mischievous creation
     of set-user-id or set-group-id programs.

     The chgrp utility exits 0 on success, and >0 if an error occurs.

FILES

     /etc/group  Group ID file

SEE ALSO

     chown(2), lchown(2), fts(3), group(5), passwd(5), symlink(7), chown(8)

STANDARDS

     The chgrp utility is expected to be POSIX 1003.2 compatible.

     The -v option and the use of ``#'' to force a numeric group ID are extensions to IEEE Std 1003.2 (``POSIX.2'').

BSD
								September 25, 2003							       BSD
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