bash script problem

bash script problem

[Daniel Peter Cavanagh]

Hi,

I'd like to write a script that will run a command, and if successful 
run another command otherwise echo a message.

This is what I have but it doesn't work (I've never written a bash 
script before):

if [ `fetchmail -su nofsk pop.vtown.com.au` ]; then
    pine
else
    echo failed fetch
fi

Could something please fix this up. Thanks for your help, Daniel.

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Re: bash script problem

[ichi]

Daniel Peter Cavanagh wrote:
> 
> I'd like to write a script that will run a command, 
> and if successful run another command otherwise echo 
> a message.

How about this:
------------------------------------
fetchmail -su nofsk pop.vtown.com.au
case $? in 0) pine;;
           *) echo failed fetch;;
esac
------------------------------------ 

Cheers,
Steven


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Re: bash script problem

[Brian Jackson]

Try this: 

fetchmail -su nofsk pop.vtown.com.au && pine || echo failed fetch 

see if that works for you. 

 --Brian Jackson 

Daniel Peter Cavanagh writes: 

> Hi, 
> 
> I'd like to write a script that will run a command, and if successful run 
> another command otherwise echo a message. 
> 
> This is what I have but it doesn't work (I've never written a bash script 
> before): 
> 
> if [ `fetchmail -su nofsk pop.vtown.com.au` ]; then
>    pine
> else
>    echo failed fetch
> fi 
> 
> Could something please fix this up. Thanks for your help, Daniel. 
> 
> -
> To unsubscribe from this list: send the line "unsubscribe linux-newbie" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.linux-learn.org/faqs
 
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Re: bash script problem

[Chuck Gelm]

Check this bash script for me, please.

#/bin/sh
#
# if a floppy can be formatted 1.68 megabytes
#    with 0 bad blocks
# else
#    format 1.44 megabytes
# fi
# mkfs.msdos /dev/fd0
#
if   (superformat /dev/fd0u1680 && badblocks -c 512 -n /dev/fd0u1680);
then
     mkfs.msdos /dev/fd0u1680
else superformat /dev/fd0u1440 
     mkfs.msdos /dev/fd0u1440
fi
mdir
#

 I'm thinking that 'badblocks' can find bad blocks and still return
a 'true' condition.  If this is true, is there any way to cause
the smaller format?

 If 'superformat /dev/fd0u1680' fails, it drops back to '/dev/fd0u1440'.

Regards, Chuck
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