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Top Forums Shell Programming and Scripting HELP on checking for directory or symbolic link Post 302694977 by newbie_01 on Friday 31st of August 2012 08:39:52 PM
Old 08-31-2012
Quote:
Originally Posted by methyl
Nearly there but the echo statements do not match the tests. The Conditional Expression syntax "[[ .....]]" is not needed.

Code:
#!/bin/ksh

for checkdir in dir*
do
   echo "Checking ${checkdir}"

   if [ -h "${checkdir}" ] ; then
      echo "... ${checkdir} is a symbolic link"
   elif [ -d "${checkdir}" ] ; then
      echo "... ${checkdir} is a directory"
   fi
done


Thanks a lot methyl, that is so very embarrassing SmilieSmilie ....

All good now ... still stumped on why the -d returns true for a symbolic link though, it's like it is trying to check whether the link that the symlink is set to is a directory.

I can live with doing the -h then the -d for the time being ... thanks again for pointing out my mistakes ... need to grab some more coffee I guess

Below is an example where I create another symbolic link but the actual directory /tmp/x does not exist and my original script works like how I want it to. Any chance that there is a test where it will not try and resolve what the symbolic link is linking to?

Code:
tmp $: ./x.ksh
Checking dir1
... dir1 is a directory
Checking dir2
... dir2 is a directory
Checking dir3
... dir3 is a directory
Checking dir4
... dir4 is a symbolic link
tmp $: cat x.ksh
#!/bin/ksh

for checkdir in dir*
do
   echo "Checking ${checkdir}"

   if [[ -d "${checkdir}" ]] ; then
      echo "... ${checkdir} is a directory"
   elif [[ -h "${checkdir}" ]] ; then
      echo "... ${checkdir} is a symbolic link"
   fi
done
tmp $: ls -ltrd /tmp
drwxrwxrwt  79 root     root      221472 Sep  1 12:41 /tmp
tmp $: ls -ltrd /tmp/x
/tmp/x: No such file or directory
tmp $:


Last edited by newbie_01; 08-31-2012 at 09:45 PM.. Reason: More info
 

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pwd(1)							      General Commands Manual							    pwd(1)

NAME
pwd - working directory name SYNOPSIS
DESCRIPTION
prints the path name of the working (current) directory. Options recognizes the following options: Display the directory with the name of the symbolic link if any. If the environment variable contains an absolute path name of the current directory that does not contain the file names (dot) or (dot-dot), writes this path name to standard output. Otherwise, the option behaves like the option. Display the actual physical directory path. Directories of symbolic link types are not displayed. If both and are specified, the last one applies. If neither nor is specified, the default option is: from UNIX 2003 environment onwards; see standards(5). otherwise. EXTERNAL INFLUENCES
For information about the UNIX Standard environment, see standards(5). Environment Variables determines the language in which messages are displayed. If is not specified in the environment or is set to the empty string, the value of is used as a default for each unspecified or empty vari- able. If is not specified or is set to the empty string, a default of "C" (see lang(5)) is used instead of If any internationalization variable contains an invalid setting, behaves as if all internationalization variables are set to "C". See environ(5). International Code Set Support Single- and multibyte character code sets are supported. DIAGNOSTICS
Possible file system trouble; contact system administrator. Current directory has been removed (usually by a different process). Use command to move to a valid directory (see cd(1)). EXAMPLES
If your home directory is and the command is executed from the home directory, typing produces the following display: In the following example, a symbolic link, points to the directory. Then the command displays the actual directory: The command displays the directory with the symbolic link: In the following example, there is no symbolic link. The displayed directory is the same for both the and options. AUTHOR
was developed by AT&T and HP. SEE ALSO
cd(1), csh(1), sh(1), sh-posix(1), standards(5). STANDARDS CONFORMANCE
pwd(1)
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