Using links with wildcards in bash. Post: 302351250

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Top Forums Shell Programming and Scripting Using links with wildcards in bash. Post 302351250 by cop02ia on Monday 7th of September 2009 10:45:48 PM

09-07-2009

Registered User

Using links with wildcards in bash.

I wrote a script using softlinks with wildcards and found out that it causes ambiguity.
I found an inelegant workaround but still don't understand how the ambiguity is caused.

Code:
.......
mkdir -p FtE/lib
pushd FtE >/dev/null
mkdir bin blks doc etc rdl sim sw syn tb
ln -s $DATASOURCE/SCs/synopsys/*.lib lib/.
popd >/dev/null

echo -e "Please insert the project name:"
read PROJECT
.......
.......
mkdir -p soc/Lib
pushd soc >/dev/null

#ln -s ../../FtE/lib/* Lib/.
#ln -s ../../FtE/lib/*.lib Lib/.
for LINKS in `ls ../FtE/lib`
do
ln -s ../../FtE/lib/$LINKS Lib/.
done
popd >/dev/null
.......
The green codes shows what worked. The brown code shows those that failed.
In the first green line, I used a wildcard (*) with 'ln -s' and it is accepted.
The next time I tried this, it fails so I have to use a 'for' loop.
Can anyone clarify what the ambiguity is here?

Last edited by cop02ia; 09-07-2009 at 11:59 PM..

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set_link

set link(1m)															      set link(1m)

NAME

       set link - Changes the value of a modifiable, single-valued attribute of a soft link

SYNOPSIS

       cdscp set link link-name attribute-name = attribute-value

ARGUMENTS

       The  full  name	of  the  soft link.  The name of the attribute to be modified.	Specify only one attribute at a time.  See Description for
       valid attribute names.  The value of a particular attribute.

DESCRIPTION

       The set link command changes the value of a modifiable, single-valued attribute of a soft link.	The following are valid attributes: Speci-
       fies the full name of the directory, object entry, or other soft link to which the soft link points.  Specifies a timeout value after which
       the soft link is either checked or deleted.  The timeout value contains both an expiration time and an  extension  time.  If  a	soft  link
       expires and its target entry is deleted, the soft link is deleted. If the soft link still points to an existing entry, its life is extended
       by the expiration time. Specify expiration-time in the format yyyy-mm-dd-hh:mm:ss (year-month-day-hour:minute:second).  Specify	extension-
       time in the format ddd-hh:mm:ss (day-hour:minute:second).

   Privilege Required
       You must have write permission to the soft link.

NOTE

       This command is replaced at Revision 1.1 by the dcecp command and may not be provided in future releases of DCE.

EXAMPLE

       The  following  command	redirects a soft link named /.:/admin/work_disk from its current destination name, /.:/admin/work_disk01, to a new
       destination name, /.:/admin/work_disk03.  cdscp> set link /.:/admin/work_disk CDS_LinkTarget = /.:/admin/work_disk03

RELATED INFORMATION

       Commands: create link(1m), delete link(1m), list link(1m), show link(1m)

																      set link(1m)