Solved

tcsh shell script expanding * as files

Posted on 2002-07-10
3
386 Views
Last Modified: 2008-03-04
Hello,

Here is a simple shell script saved in a file called "test":
_____________________________
if [ $# -gt 0 ]
then
        echo "arguments number $#"
        while [ $1 ]
        do
                echo "param $1"
                shift
        done
fi
_____________________________


If I launch it with "test *" and if in the directory there are two files "file1" and "test" here is the result:

__________
arguments number 2
param file1
param test
___________


My question is: why?
What I expected was:

___________
arguments number 1
param *
___________


Another thing strange (in my opinion), is that if I remove the "if" test lines like that:
___________________
echo "arguments number $#"
while [ $1 ]
do
        echo "param $1"
        shift
done
___________________

The result of the execution of the script "test *" is:

___________________
arguments number 2
while: Expression Syntax.
___________________


Do you have an idea?

Thanx
0
Comment
Question by:bonduel
  • 2
3 Comments
 
LVL 40

Accepted Solution

by:
jlevie earned 200 total points
Comment Utility
It is the shell that expands wildcards, not the script por program. So when you feed you script a command line containg a wildcard (*), the shell looks in the current (or specified path) for all files/dirs that match the wildcard and then invokes the script with those arguments.
0
 

Author Comment

by:bonduel
Comment Utility
Yes you're right, thank you for you comment.
In fact, it is simple to avoid this by quoting the * like:
test "*"

I found this by doing some tests.

I think it is 200 wasted points, and some of your time.

Thank you again.
0
 

Author Comment

by:bonduel
Comment Utility
Ha, and about the while error, I should replace the test:

    while [ $1 ]

with

    while [ "$1" != "" ]

Like this it works.
0

Featured Post

IT, Stop Being Called Into Every Meeting

Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

Join & Write a Comment

My previous tech tip, Installing the Solaris OS From the Flash Archive On a Tape (http://www.experts-exchange.com/articles/OS/Unix/Solaris/Installing-the-Solaris-OS-From-the-Flash-Archive-on-a-Tape.html), discussed installing the Solaris Operating S…
I have been running these systems for a few years now and I am just very happy with them.   I just wanted to share the manual that I have created for upgrades and other things.  Oooh yes! FreeBSD makes me happy (as a server), no maintenance and I al…
Learn several ways to interact with files and get file information from the bash shell. ls lists the contents of a directory: Using the -a flag displays hidden files: Using the -l flag formats the output in a long list: The file command gives us mor…
Learn how to get help with Linux/Unix bash shell commands. Use help to read help documents for built in bash shell commands.: Use man to interface with the online reference manuals for shell commands.: Use man to search man pages for unknown command…

763 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

6 Experts available now in Live!

Get 1:1 Help Now