wildcard in loops

[vidmo]

I'm hoping this is a simple question:

my script:

x="B1"
if [ "$x" = B* ]; then
echo B
else
echo M
fi

this doesn't work but hopefully you can see what i want to do - how do i get the if loop to recognize that the input contains the letter 'b' with out having to do:
if [ x = 1 ] || [ x = 2 ] || [ x = 3 etc.......

thanks

vidmo

 

[columb]

You could use expr. for example

x=B1
if expr $x : "B*" >/dev/null 
then
  echo B
else
  echo M
fi

or you could use case

case $x in
  B*) echo B;;
  *)  echo M;;
esac

Ceci n'est pas une signature
Columb Healy

 

[feherke]

Hi

Eh, turbo Columb. Only one solution left to me :

x="B1"
if [red][[/red][ "$x" = B* ][red]][/red]; then
echo B
else
echo M
fi

Tested with [tt]bash[/tt] and (pd)[tt]ksh[/tt].

By the way, the [tt]if[/tt] is not a loop.

Feherke.

http://rootshell.be/~feherke/

 

[vidmo]

thanks very much, both of you,
feherke- can i ask why the extra brackets enable the wildcard?

thanks
vidmo

 

[Annihilannic]

[ is the original Bourne shell (sh) syntax for evaluating conditional expressions. [[ was added by ksh and used in subsequent shells like bash. I think.

Annihilannic.