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Top Forums Shell Programming and Scripting Chunks of bash shell programming Post 302852373 by lg123 on Wednesday 11th of September 2013 12:31:05 PM
Old 09-11-2013
Chunks of bash shell programming

I am going to provide a chunks of codes that I do not understand. Please help with them in a layman's terms.
Code:
1) ${DEBUG:-0}

--------------------------------------------------------------------------

2) print "${1}"

--------------------------------------------------------------------------

3) function logmsg {
    if [ ! -f ${MAILFILE} ];
    then
        start_mail
    fi
    print "${1}" | ${TEE} -a ${MAILFILE}
    }

--------------------------------------------------------------------------

4) function debugmsg {
    if [ ${DEBUG} -ne 1 ];
    then
        return
    fi
    logmsg "${1}"
    }

--------------------------------------------------------------------------

5) H="How are you"

--------------------------------------------------------------------------

6) if [ ! -z "${msg}" ];

--------------------------------------------------------------------------


Last edited by vbe; 09-11-2013 at 02:04 PM.. Reason: thats no reason to not use code tags!
 

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PAPS(1) 						      General Commands Manual							   PAPS(1)

NAME
paps - UTF-8 to PostScript converter using Pango SYNOPSIS
paps [options] files... DESCRIPTION
paps reads a UTF-8 encoded file and generates a PostScript language rendering of the file. The rendering is done by creating outline curves through the pango ft2 backend. OPTIONS
These programs follow the usual GNU command line syntax, with long options starting with two dashes (`-'). A summary of options is included below. --landscape Landscape output. Default is portrait. --columns=cl Number of columns output. Default is 1. --font=desc Set the font description. Default is Monospace 12. --rtl Do rtl layout. --paper ps Choose paper size. Known paper sizes are legal, letter, a4. Default is A4. --bottom-margin=bm Set bottom margin in postscript points (1/72 inch). Default is 36. --top-margin=tm Set top margin. Default is 36. --left-margin=lm Set left margin. Default is 36. --right-margin=rm Set right margin. Default is 36. --help Show summary of options. --header Draw page header for each page. --markup Interpret the text as pango markup. --encoding=ENCODING Assume the documentation encoding is ENCODING. --lpi Set the lines per inch. This determines the line spacing. --cpi Set the characters per inch. This is an alternative method of specifying the font size. --stretch-chars Indicates that characters should be stretched in the y-direction to fill up their vertical space. This is similar to the texttops behaviour. AUTHOR
paps was written by Dov Grobgeld <dov.grobgeld@gmail.com>. This manual page was written by Lior Kaplan <kaplan@debian.org>, for the Debian project (but may be used by others). April 17, 2006 PAPS(1)
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