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Top Forums Shell Programming and Scripting Ksh93 vs. Pdksh88: Custom PS1 prompt not working Post 302489065 by alan on Wednesday 19th of January 2011 11:28:46 AM
Old 01-19-2011
Ksh93 vs. Pdksh88: Custom PS1 prompt not working

Greetings!

I have to work with a NFS user id between two hosts: A running Ksh 93 and B running pdksh 88.

My problem has to do with the custom prompt I created on A: it works like a charm and display colors:

Code:
   PS1="$'\E[46;31m'`logname`@$'\E[1;33m'`hostname -s`:$'\E[0m>"

But I switch over to B, it all goes to hell (private info removed). The prompt fails to display colors like host A ; instead, the color codes are displayed "in clear".

Code:
   $'\E[46;31m'NFS_user_name@$'\E[1;33m'host_name_for_B:$'\E[0m>

The prompt on host B is not displaying colors like host A so I want B to display a basic prompt instead. To get around the problem, I edited my .kshrc file to add this code at the end

Code:
    export NODE=`uname -n`
    
    case $NODE in
        host_name_for_B)
            PS1="[`logname`@`uname -n`]>"
            ;;
        *)
            PS1="$'\E[46;31m'`logname`@$'\E[1;33m'`hostname -s`:$'\E[0m>"
            ;;
    esac

The case statement does not work: PS1 does not switch to `PS1="[`logname`@`uname -n`]>"`.

Any idea what could be the problem? Thanks!
 

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logname(1)						      General Commands Manual							logname(1)

NAME
logname - Displays user login name SYNOPSIS
logname STANDARDS
Interfaces documented on this reference page conform to industry standards as follows: logname: XCU5.0 Refer to the standards(5) reference page for more information about industry standards and associated tags. OPTIONS
None OPERANDS
None DESCRIPTION
The logname command writes to standard output the name you used to log into the system. NOTES
The logname command explicitly ignores the LOGNAME environment variable to avoid erroneous results from environment changes. EXIT STATUS
The following exit values are returned: Successful completion. The getlogin() utility would fail. ENVIRONMENT VARIABLES
The following environment variables affect the execution of *cmd*: Provides a default value for the internationalization variables that are unset or null. If LANG is unset or null, the corresponding value from the default locale is used. If any of the internationalization vari- ables contain an invalid setting, the utility behaves as if none of the variables had been defined. If set to a non-empty string value, overrides the values of all the other internationalization variables. Determines the locale for the interpretation of sequences of bytes of text data as characters (for example, single-byte as opposed to multibyte characters in arguments). Determines the locale for the for- mat and contents of diagnostic messages written to standard error. Determines the location of message catalogues for the processing of LC_MESSAGES. SEE ALSO
Commands: id(1), env(1), login(1), who(1) Functions: getlogin(2) Standards: standards(5) logname(1)
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