Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 521
  • Last Modified:

Bash script

Good day Group

I am just a beginner with bash scripting and I just need some direction in creating a script. So basically, I need to create a script where if
I execute with the script like this :

./script bob - it prints out Mary

and

./script Mary - it prints out bob

and if neither command is parsed to it, it returns to stand err

Any suggestions would be highly appreciated.
0
tuxracer
Asked:
tuxracer
  • 2
  • 2
  • 2
  • +1
3 Solutions
 
omarfaridCommented:
try

case $1 in
bob)
      echo Mary
      ;;
Mary)
      echo bob
      ;;
*)
      echo wrong name
esac
0
 
egarciatCommented:
as a complement to omarfarid's post, I would change the following:

*)
      echo wrong name

to:

*)
      echo "wrong name" >&2

That will write "wrong name" to standard error..

0
 
point_pleasantCommented:
Alway the if then else option
stderr redirected to stdout

if [ $1 == "bob" ]; then
        echo "Mary"
elif [ $1 == "Mary" ]; then
        echo "bob"
else
        echo "Usage script [bob|Mary]" 2>&1
fi
0
Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

 
egarciatCommented:
else
        echo "Usage script [bob|Mary]" 2>&1
fi

This will redirect stderr to stdout, it will not write to stderr.

I understand that tuxracer wants errors on stderr.
0
 
point_pleasantCommented:
unless other wise provided for 2>&1 and >&2 are exactly the same.  typicall stderr is redirected to a file for debugging.  stderr defaults to stdout unless outerwise directed.  since tuxracer did not specify a file both 2>&1 and >&2 are exactly the same.
0
 
tuxracerAuthor Commented:
Hi Guys

Thank you all for the great responses. Its what I was looking for for.

Much appreciated!!!! Collaboration - rocks!!!

Tuxracer
0
 
omarfaridCommented:
Welcome
0

Featured Post

[Webinar On Demand] Database Backup and Recovery

Does your company store data on premises, off site, in the cloud, or a combination of these? If you answered “yes”, you need a data backup recovery plan that fits each and every platform. Watch now as as Percona teaches us how to build agile data backup recovery plan.

  • 2
  • 2
  • 2
  • +1
Tackle projects and never again get stuck behind a technical roadblock.
Join Now