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BASH scripting - menu dialog

Posted on 2007-04-02
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Last Modified: 2013-12-26
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 ?
0
Comment
Question by:rares_dumitrescu
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6 Comments
 
LVL 84

Expert Comment

by:ozo
ID: 18839075
what is $answer when it does not go to 'dialog --inputbox "What port do you wish for the psybnc ?" 07 40
' as it should
0
 
LVL 84

Expert Comment

by:ozo
ID: 18839186
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
0
 
LVL 84

Accepted Solution

by:
ozo earned 2000 total points
ID: 18839196
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
0
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Author Comment

by:rares_dumitrescu
ID: 18841343
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 ? :|
0
 
LVL 84

Expert Comment

by:ozo
ID: 18841356
where does it block?
exec 2> $tempfile
and
cat /dev/null > $tempfile
in the same script could confuse the buffers
0
 

Author Comment

by:rares_dumitrescu
ID: 18848894
i made it work, thanx for your response, it helped
0

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