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Full Discussion: Difficulty with a couple commands porting from korn shell to bash
Top Forums Shell Programming and Scripting Difficulty with a couple commands porting from korn shell to bash Post 302603674 by inakajin on Thursday 1st of March 2012 06:20:12 PM
Old 03-01-2012
Difficulty with a couple commands porting from korn shell to bash
I am relatively new to shell scripting. I have a script I wrote that works fine in korn shell.

I need to make it work in bash on a different server.

There are a couple valid korn shell commands I am having difficulty finding the bash equivalents for.

At one point the scripts prompts the user for their IP to export display. The read command used in the kornshell version to control a timeout is not valid in bash:
Code:
# Prompt for IP address 
  echo "Enter your IP address and press Return: "
  if read -t 90 ipadd; then    #90 second timeout if no user input.
     export DISPLAY=$ipadd:0.0
  else
    echo "Too much time has elapsed. Terminating script."
    exit 1
  fi

The error generated is read: -t: unknown option.

Users are asked later to specify the binary they want to run. bash is not interpreting the kornshell command. They are giving a list of binaries then script goes to the directory the binaries are in, and, if it is a valid name, executes it. If it is not found it just returns and invalid message.

None of the binaries are being found even though they are valid. The if [ -f ....] construct is not working in bash.
Code:
if [ -f /path/to/binary/$variable ]; then
                /path/to/binary/$variable
        
            finished=1
    
            else
        
            echo "Invalid selection. Please try again."
 fi

Any suggestions would be greatly appreciated. Thank you for your time.
 

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LEARN ABOUT ULTRIX

vconsole.conf

VCONSOLE.CONF(5)						   vconsole.conf						  VCONSOLE.CONF(5)

NAME

       vconsole.conf - configuration file for the virtual console

SYNOPSIS

       /etc/vconsole.conf

DESCRIPTION

       The /etc/vconsole.conf file configures the virtual console, i.e. keyboard mapping and console font.

       The basic file format of the vconsole.conf is a newline-separated list environment-like shell-compatible variable assignments. It is
       possible to source the configuration from shell scripts, however, beyond mere variable assignments no shell features are supported,
       allowing applications to read the file without implementing a shell compatible execution engine.

       Note that the kernel command line options vconsole.keymap=, vconsole.keymap.toggle=, vconsole.font=, vconsole.font.map=,
       vconsole.font.unimap= may be used to override the console settings at boot.

       Depending on the operating system other configuration files might be checked for configuration of the virtual console as well, however only
       as fallback.

OPTIONS

       The following options are understood:

       KEYMAP=, KEYMAP_TOGGLE=
	   Configures the key mapping table of for they keyboard.  KEYMAP= defaults to us if not set. The KEYMAP_TOGGLE= can be used to configured
	   a second toggle keymap and is by default unset.

       FONT=, FONT_MAP=, FONT_UNIMAP=
	   Configures the console font, the console map and the unicode font map.  FONT= defaults to latarcyrheb-sun16.

EXAMPLE

       Example 1. German keyboard and console

       /etc/vconsole.conf:

	   KEYMAP=de-latin1
	   FONT=latarcyrheb-sun16

SEE ALSO

       systemd(1), loadkeys(1), setfont(8), locale.conf(5)

AUTHOR

       Lennart Poettering <lennart@poettering.net>
	   Developer

systemd 							    10/07/2013							  VCONSOLE.CONF(5)
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