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Full Discussion: Bash shell - Check if value is valid directory.
Homework and Emergencies Homework & Coursework Questions Bash shell - Check if value is valid directory. Post 302573473 by netmaster on Monday 14th of November 2011 04:57:47 PM
Old 11-14-2011
Bash shell - Check if value is valid directory.
1. The problem statement, all variables and given/known data:

The script usage will be as follows:
library.third source_directory [destination directory]

- Your script will display an appropriate error message and exit with status 3 if no parameters are given
- Your script will display an appropriate error message and exit with status 4 if the source directory does not exist
- Your script will display an appropriate error message and exit with status 5 if the source is not a directory
- Your script will display an appropriate error message and exit with status 6 if destination directory does not exist
- Your script will display an appropriate error message and exit with status 7 if destination is not a directory

2. Relevant commands, code, scripts, algorithms:

Simple Unix Bash commands have been used in this program, that is all that has been taught in the course so far. By this, I mean if statements and basic looping, nothing complex.

3. The attempts at a solution (include all code and scripts):

The section I am having trouble with is:
Your script will display an appropriate error message and exit with status 5 if the source is not a directory.

The statement does not recognize any file type as a directory.

Code:
DIR="$1"

if [ $# -lt 1 ]
then
        echo "Incorrect Usage"
        exit 3

elif [ ! -d "$DIR" ]
then
        echo "Directory does not exist!"
        exit 4

elif [ "$DIR" != -d ]
then
        echo "Not a Directory"
        exit 5
else
        echo "Path is okay"

fi



4. Complete Name of School (University), City (State), Country, Name of Professor, and Course Number (Link to Course):

Seneca College of Applied Arts of Technology, Toronto, Canada, Michal Heidenreich, OPS105
 

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LEARN ABOUT SUSE

gitaction

gitaction(1)						      General Commands Manual						      gitaction(1)

NAME

       gitaction - GNU Interactive Tools - per file type action script

SYNTAX

       gitaction directory file
       .gitaction directory file

DESCRIPTION

       gitaction  is a script that executes a different action for each file type specified. It is called by the gitfm program when pressing F2 or
       ^Xa (see the gnuitrc.TERM configuration files in the gnuit manual). The first parameter is the current directory name and the second one is
       the file name to be matched against the default patterns. The matching is done using the shell 'case' statement.  If you press F2 or ^Xa on
       a *.html file, gitfm will invoke a browser to view it, if you press F2 or ^Xa on a *.tar.gz file, gitfm will list the tar archive contents,
       if you press the same keys on a *.gz file, gitfm will display its uncompressed contents on the screen, etc ...

       If  you	press  F2  or ^Xa on a *.gif file or *.jpg file and you have the zgv utility installed, you will be able to see it. If you want to
       change the gif/jpeg viewer, all you need to do is to change its name in the gitaction script.

       There are many more file types and viewers that gitaction knows about.  In addition, if you are running under GNOME,  gnome-open  is  used,
       and on MacOS, open(1) is used. see(1) and metamail(1) are also used as fallbacks.

       If  all else fails, the file is displayed using $GNUIT_PAGER. Feel free to change this. If you want to find out what the default action for
       each file type is (or if you want to modify it), just read/modify the gitaction script.

       The script can be easily enhanced. Just read it.

       The .gitaction script is a local version of the gitaction script. When started, gitaction tries to search a script called .gitaction in the
       current	directory and, if it finds it, it starts it. If .gitaction's exit code is 0 ( .gitaction couldn't find a matching pattern), gitac-
       tion starts its own case statement trying to match the current file name (the second parameter) against its default patterns.

       The .gitaction script *must* be executable. An example of .gitaction can be found in the  directory  gitfm  is  installed  into.   (usually
       /usr/local/bin  or /usr/bin) Debian users can find it in /usr/share/doc/gnuit/examples/.  You should copy the example to the current direc-
       tory or your home directory and then modify it.

BUGS

       Please send bug reports to:
       gnuit-dev@gnu.org

SEE ALSO

       gitfm(1) gitps(1) gitview(1) gitmount(1) gitkeys(1) gitrgrep(1) gitunpack(1)

AUTHORS

       Tudor Hulubei <tudor@cs.unh.edu>
       Andrei Pitis <pink@pub.ro>
       Ian Beckwith <ianb@erislabs.net> (current maintainer).

																      gitaction(1)
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