[SOLVED] Help on Bash dialog prompt script needed

tasty_minerals · 2011-08-29 19:50:27

I need a script to invoke a window and ask yes/no question, after that this script should run "reboot" or "halt" depending on the answer.
I've downloaded gxmessage and wrote this small script

#!/bin/bash
answer=$(gxmessage  "Are you sure you want to shutdown? " -buttons yes,no -print) &&
if [$answer == "yes"]; 
then exec sys_halt
else exit
fi

But it doesn't seem to work, tip me where am I wrong?

Last edited by tasty_minerals (2011-08-29 21:05:42)

falconindy · 2011-08-29 19:53:16

[ is not part of if's syntax. 'if' expects commands, and [ is a command with "$answer", "=", and "yes" being arguments to it. You don't type "lsdir", you type "ls dir".

if [[ "$answer" = "yes" ]]; then
  # do stuff
else
  # do something else
fi

Note that usage of '==' isn't POSIX, meaning it's invalid inside [ ]. Bash will, however, accept this without whining (a bug, imo).

I suggest reading this: http://mywiki.wooledge.org/BashGuide

Last edited by falconindy (2011-08-29 19:53:56)

tasty_minerals · 2011-08-29 19:56:56

falconindy wrote:

[ is not part of if's syntax. 'if' expects commands, and [ is a command with "$answer", "=", and "yes" being arguments to it. You don't type "lsdir", you type "ls dir".
if [[ "$answer" = "yes" ]]; then
  # do stuff
else
  # do something else
fi
Note that usage of '==' isn't POSIX, meaning it's invalid inside [ ]. Bash will, however, accept this without whining (a bug, imo).
I suggest reading this: http://mywiki.wooledge.org/BashGuide

thanks a lot

tasty_minerals · 2011-08-29 20:03:36

well what I did is

#!/bin/bash
gxmessage  "Are you sure you want to shutdown? " -buttons yes,no &&
if [[ $? == 101 ]];
then
        exec sys_halt
else
        exit
fi

$? contains 101(yes) or 102(no), but no effect still,
could you please be more specific. sorry

falconindy · 2011-08-29 20:13:48

Non-zero exit values are false, so the second half of your compound command will never execute. Really, read the guide. It's very specific and very user friendly.

Arch Linux

#1 2011-08-29 19:50:27

[SOLVED] Help on Bash dialog prompt script needed

#2 2011-08-29 19:53:16

Re: [SOLVED] Help on Bash dialog prompt script needed

#3 2011-08-29 19:56:56

Re: [SOLVED] Help on Bash dialog prompt script needed

#4 2011-08-29 20:03:36

Re: [SOLVED] Help on Bash dialog prompt script needed

#5 2011-08-29 20:13:48

Re: [SOLVED] Help on Bash dialog prompt script needed

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