Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
The problem statement, all variables and given/known data:
Write a Bourne shell script which:
� Has one command line argument.
� If the command line argument is a directory then the script should output the number of files in the directory.
� If the command line argument is an ordinary file then the script should output whether or not the file has execute permission for the file owner.
� If the command line argument is neither a file or directory then the script should output an appropriate error message.
� If no command line argument is supplied then the script should output an appropriate error message.
Relevant commands, code, scripts, algorithms:
The attempts at a solution (include all code and scripts):
Complete Name of School (University), City (State), Country, Name of Professor, and Course Number (Link to Course):
Curtin university, sedney, Australia, 101.
Note: Without school/professor/course information, you will be banned if you post here! You must complete the entire template (not just parts of it).
I notice that the section with your attempts is alarmingly blank. Did you try anything yet? Or are you hoping that someone here will do your work for you?
Aside from that, as far as I know it's spelled Sydney. And what 101 course are you taking?
#!/bin/sh
echo " Command line argument is :" $1
if [ -d $1 ]
then
echo " The number of files in the directory is ` ls -l | wc -l` "
else
echo " It is not a dirctory "
fi
if [ -f $1 ]
then
echo " The execute permission for the file owner is ` ls -l $1`"
else
echo " There is no execute permission "
fi
First of all, I don't think your script behaves as required, at least I don't see a requirement to tell the user that the argument isn't a directory, or doesn't have the executable bit set.
Try to get the logical flow down for the script first, and jot down some pseudo-code, eg
if argument given
if directory
count files
exit
else if file
if executable
say so
else
say not executable
else
argument is something else
else
say error
For the tests, man test (POSIX) (shorthand: [ ... ] ) has some very valuable operators to check for files, directories, executables, and if a string has zero length.
BTW, with your method of counting you'll have a one-off error. Compare the output of ls -l | wc -l and ls | wc -l . I'll leave it to you to find the source of that error
