Very Computer

Hi,
        I wrote this script, how can trap the user until
the choice is 7

----------
#! /bin/csh -f
#
# This script will let user access internet

#
#  These are the Choices
#
echo "             1. lynx \
                2. mosaic  <-<- Requires a graphics interface\
                3. gopher\
                4. ftp\
                5. telnet\
                6. archie\
                7. exit"
# Here we do the enterning
echo -n "Please Choose one from above   "
set choice="$<"

# Here we see the choices
if ("$choice" == "1" ) then
        /usr/local/bin/lynx http://www/homepage.html
endif
if ("$choice" == "2" ) then
        /usr/local/bin/mosaic http://www/homepage.html
endif
if ("$choice" == "3" ) then
        /usr/more/bin/gopher scsu.ctstateu.edu
endif
if ("$choice" == "4" ) then
        /usr/ucb/ftp
endif
if ("$choice" == "5" ) then
        /usr/ucb/telnet
endif
if ("$choice" == "6" ) then
        clear; echo "Login as archie";sleep 1; telnet ds.internic.net
endif
if ("$choice" == "7" ) then
        exit (0)
endif
----------
Any Help App...
Thanx
Bikesh
TUM

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Quote:> Hi, I wrote this script, how can trap the user until the choice is 7

You need to embed it into a while loop.  However, the user can still
exit the script by typing ctrl-c.

#!/bin/sh
#
# Trap user in script until option is made
#

echo "     1. lynx
        2. mosaic <-<- Requires a graphics interface
        3. gopher
        4. ftp
        5. telnet
        6. archie
        7. exit"

while true
do
 echo "Please choose one from above   "
 read choice

 case $choice in
        1) echo lynx;;
        2) echo mosaic;;
        3) echo gopher;;
        4) echo ftp;;
        5) echo telnet;;
        6) echo archie;;
        7) exit 0;;
 esac
done

Hope this helps
John
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: Hi,
:       I wrote this script, how can trap the user until
: the choice is 7

: ----------
: #! /bin/csh -f
: #
: # This script will let user access internet

: #
: #  These are the Choices
: #
: echo "           1. lynx \
:               2. mosaic  <-<- Requires a graphics interface\
:               3. gopher\
:               4. ftp\
:               5. telnet\
:               6. archie\
:               7. exit"
: # Here we do the enterning
: echo -n "Please Choose one from above   "
: set choice="$<"

: # Here we see the choices
: if ("$choice" == "1" ) then
:       /usr/local/bin/lynx http://www/homepage.html
: endif
: if ("$choice" == "2" ) then
:       /usr/local/bin/mosaic http://www/homepage.html
: endif
: if ("$choice" == "3" ) then
:       /usr/more/bin/gopher scsu.ctstateu.edu
: endif
: if ("$choice" == "4" ) then
:       /usr/ucb/ftp
: endif
: if ("$choice" == "5" ) then
:       /usr/ucb/telnet
: endif
: if ("$choice" == "6" ) then
:       clear; echo "Login as archie";sleep 1; telnet ds.internic.net
: endif
: if ("$choice" == "7" ) then
:       exit (0)
: endif
: ----------
At the beginning of your script add the line:
trap "" 0 1 2 3 10 15
This will trap kill, hangup, interrupt, software termination, exit, and
quit commands.  However, if the users are crafty they will simply shell
out of ftp to get to a system prompt.

Hope this helps
JKF

[script deleted]

Quote:>At the beginning of your script add the line:
>trap "" 0 1 2 3 10 15
>This will trap kill, hangup, interrupt, software termination, exit, and
>quit commands.  However, if the users are crafty they will simply shell
>out of ftp to get to a system prompt.

Well, I don't think bikesh was using trap in the technical sense, but
rather meaning how can he keep the user executing his script until
the user selects number 7 from the menu ("exit").

There are a few ways.  The first, and easiest (and most distressing?)
is to stick a goto in there after your big if block (or don't they
teach "goto" anymore?)  Another would be to place the whole thing
inside a while statement and set a flag to exit the loop.  And many,
many more . . .

-Emery
--
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all posts referring to themselves (can you say "grepping for liable cases"?).
Get revenge on the sociopathic spammers.  Fill their disk and waste their time
by including the words "Canter", "Siegel" and "Green Card" in your .signature.

Emery said to use the `trap' command. That won't work because
trap is a Korn Shell command. You wrote your script in Csh.

What exactly do you mean by "trap the user". If it's what I think
you mean, "keep presenting the menu until a valid response is
given, then do something like this:

#!/bin/csh -f
set choices=0
while ( $choices < 1 || $choices > 7 )

   echo "Menu with 7 choices here, choose 1-7"
   set choices=$<

end

switch ($choices)

   case 1:
       echo "You picked 1"
   breaksw
   case 2:
      echo "You picked 2"
   breaksw
   case "3":
      echo "You picked 3"
   breaksw
   case "4":
      echo "You picked 4"
   breaksw
   case "5":
    echo "You picked 5"
    breaksw
   case "6":
      echo "You picked 6"
    breaksw
   case "7":
      echo "You picked 7"
    breaksw
endsw

Get rid of that ugly if/endif block and put it into a decent
switch.

BTW, If you are so mighty "The Only!!! Mighty", how come you can't
do a simple csh script like this? You should consider changing
your tag line until you can live up to it.

Dan

|> >: Hi,
|> >:     I wrote this script, how can trap the user until
|> >: the choice is 7
|> [script deleted]
|>
|> >At the beginning of your script add the line:
|> >trap "" 0 1 2 3 10 15
|> >This will trap kill, hangup, interrupt, software termination, exit, and
|> >quit commands.  However, if the users are crafty they will simply shell
|> >out of ftp to get to a system prompt.
|>

The "trap" command is a Bourne shell built-in command.  It will not work in
the C shell.  The only signal-handler in the C shell is the "onintr" command,
which will ONLY trap the INTR signal, not others.  Use the Bourne shell or
Perl for better signal handling.

|> -Emery
|> --
* snip *

Rich
--
===============================================================================
|                                                                             |
|     Richard G. Lang                      Allen-Bradley Automation Group     |
|     Systems/Network Analyst                   Highland Heights, Ohio        |

|                                                                             |
===============================================================================
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