BASH scripting - menu dialog

rares_dumitrescu
rares_dumitrescu used Ask the Experts™
on
Hello, i have a little problem with a script:
This is the code:
#!/bin/sh
tempfile=$$.tmp

exec 2> $tempfile
answer="xxx"

if [ -e psybnc ] ; then
dialog  --title "You are using the command - getpsy" \
        --inputbox "The directory psybnc exists, choose another" 8 50
newdir=`cat $tempfile`
cat /dev/null > $tempfile
if [ -e $newdir ] ; then
dialog --title "You are using the command - getpsy" \
       --msgbox "The directory $newdir also exists, begin the process again !" 5 50
rm -f $tempfile
exit 1
else
mkdir $newdir
cd $newdir
cat /dev/null > $tempfile
fi
fi

while [ "$answer" != "" ]; do
dialog --clear --title "Main Menu" \
        --menu "Use arrows to go up/down \n\
        [Enter] to select \n\
        Select one:" 20 40 10 \
        "1"       "Choose the psybnc port" \

answer=`cat $tempfile`
test "$answer" = "" && continue

if [ "$answer" = "1" ]; then
   cat /dev/null > $tempfile
   dialog --inputbox "What port do you wish for the psybnc ?" 07 40
   port=`cat $tempfile`
   echo "the port is '$port'" >psybnc.c
fi


cat /dev/null > $tempfile
done
rm -f $tempfile

When i press enter on the psybnc port the script stops, it does not go to 'dialog --inputbox "What port do you wish for the psybnc ?" 07 40
' as it should
Any ideeas ?
Comment
Watch Question

Do more with

Expert Office
EXPERT OFFICE® is a registered trademark of EXPERTS EXCHANGE®
ozo
Most Valuable Expert 2014
Top Expert 2015

Commented:
what is $answer when it does not go to 'dialog --inputbox "What port do you wish for the psybnc ?" 07 40
' as it should
ozo
Most Valuable Expert 2014
Top Expert 2015

Commented:
Did you try
dialog --clear --title "Main Menu" \
        --menu "Use arrows to go up/down \n\
        [Enter] to select \n\
        Select one:" 20 40 10 \
        "1"       "Choose the psybnc port" \ 2>$tempfile
Most Valuable Expert 2014
Top Expert 2015
Commented:
dialog --clear --title "Main Menu" \
        --menu "Use arrows to go up/down \n\
        [Enter] to select \n\
        Select one:" 20 40 10 \
        "1"       "Choose the psybnc port" \
2>$tempfile
Become a CompTIA Certified Healthcare IT Tech

This course will help prep you to earn the CompTIA Healthcare IT Technician certification showing that you have the knowledge and skills needed to succeed in installing, managing, and troubleshooting IT systems in medical and clinical settings.

Author

Commented:
i didnt have to put 2>$tempfile till now .. and no, with that it just blocks
something strange is happening

with out this:
if [ -e psybnc ] ; then
dialog  --title "You are using the command - getpsy" \
        --inputbox "The directory psybnc exists, choose another" 8 50
newdir=`cat $tempfile`
cat /dev/null > $tempfile
if [ -e $newdir ] ; then
dialog --title "You are using the command - getpsy" \
       --msgbox "The directory $newdir also exists, begin the process again !" 5 50
rm -f $tempfile
exit 1
else
mkdir $newdir
cd $newdir
cat /dev/null > $tempfile
fi
fi
the script works if i delete this, i mean the remaining code works:
#!/bin/sh
tempfile=$$.tmp

exec 2> $tempfile
answer="xxx"

while [ "$answer" != "" ]; do
dialog --clear --title "Main Menu" \
        --menu "Use arrows to go up/down \n\
        [Enter] to select \n\
        Alegeti program wishlist:" 20 40 10 \
        "1"       "Choose the psybnc port" \
        "2"       "Choose the psybnc language"\
        "3"       "Choose the psybnc's login at X"\
        "4"       "Choose the psybnc's password at X"\
        "5"       "Choose the psybnc's directory"\

answer=`cat $tempfile`
test "$answer" = "" && continue

if [ "$answer" = "1" ]; then
   dialog --inputbox "What port do you wish for the psybnc ?" 07 40
   port=`cat $tempfile`
   echo "the port is '$port'" >psybnc.c
fi

cat /dev/null > $tempfile
done

rm -f $tempfile


whats wrong in that if i wrote ? :|
ozo
Most Valuable Expert 2014
Top Expert 2015

Commented:
where does it block?
exec 2> $tempfile
and
cat /dev/null > $tempfile
in the same script could confuse the buffers

Author

Commented:
i made it work, thanx for your response, it helped

Do more with

Expert Office
Submit tech questions to Ask the Experts™ at any time to receive solutions, advice, and new ideas from leading industry professionals.

Start 7-Day Free Trial