Shell Programming and Scripting

Hi!

Thank you ina advance for your Help. Sorry my english, Im from Argentina!
Great Place!!!

So, here si my problem

I have a variable, lets say PARAMETERS that could be set like this:

Code:

PARAMETROS="-Usistemas string1 -Astring2 -G -Y -Kcoco -Y string4 -Z"

or

PARAMETROS="string1 -Astring2 -G -Y -Usistemas -Y string3 string4 -Z"

# or

PARAMETROS="string1 -Astring2 -G -Y -Kcoco -Y string4 -Z -Usistemas"

So, I need to extract the name that is next to the -U flag (is the username)
In this case is sistemas

So the -U could came like a first parameter, in the middle or like the final parameter.

ALSO, it could be some cases where a U capital letter exist in the parameter variable, like this

#PARAMETROS="-Usistemas string1 -Astring2 -G -Y -KCUCU -Y string4 -Z"

So the only thing that is common to all exaples is the -U
Im not familiar with sed or awk, and its becoming difficult with cut and if.

Can you help me?

---------- Post updated at 10:26 AM ---------- Previous update was at 10:13 AM ----------

I figured it out!

Code:

UsrFromParametros () {
for i in ${PARAMETROS} ; do
    if [ e`echo ${i}|cut -c1-2` == "e-U" ] ; then
        USUARIO=`echo ${i}|cut -dU -f2`
        echo ${USUARIO}
    fi
done
}

Moderator's Comments:

Please use next time code tags for your code and data

Here's a way using string operations on the arguments (ksh93 on Solaris):

Code:

#!/usr/dt/bin/dtksh
for i in $*
do
  # If the first two characters = "-U" then the rest is the username.
  if [[ ${i:0:2} == "-U" ]]; then
    user=${i:2:${#i}}
  fi
done
print "USER: $user"
exit 0

Output:

Code:

$ ./argtest -Usistemas string1 -Astring2 -G -Y -Kcoco -Y string4 -Z
USER: sistemas
$

Cheat sheet on string operations:
Reference Cards

You may also want to read up on the getopts command for parsing command line options.