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Full Discussion: Iterative operation
Top Forums Shell Programming and Scripting Iterative operation Post 302229440 by era on Wednesday 27th of August 2008 03:33:40 AM
Old 08-27-2008
Recent versions of host can perform a reverse DNS lookup directly on the IP address. If you have an older version, or wish to use dig or some other tool, you have to convert the IP address into the format used internally for reverse DNS lookups. Here is an example.

Code:
OLDIFS=$IFS
IFS=.
set -- $ip
IFS=$OLDIFS
echo IP=$ip, hostname=`dig +short ptr $4.$3.$2.$1.in-addr.arpa.`

 

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WMGRABIMGAE(1)						      General Commands Manual						    WMGRABIMGAE(1)

NAME
WMGRABIMGAE - Dockable WWW Image monitor. SYNOPSIS
wmGrabImage [-h] [-display <Display>] -url <Image URL> [-http <URL>] [-c] [-delay <Time>] DESCRIPTION
wmGrabImage is a WindowMaker DockApp that maintains a small thumbnail copy of your favorite image from the WWW. The image to monitor is specified via the "-url <Image URL>" command-line option and it gets updated approximately every 5 minutes. The update interval can be overridden via the "-delay <Time>" command-line option (Time is in seconds). Each of the three mouse buttons can be double clicked with the following effects; Left Mouse: Brings up the full-sized image in xv. Middle Mouse: Sends a URL (specified via the -http <URL> command-line option) to an already running netscape process or in a new netscape process if there arent any running. Right Mouse: Updates the image immediately. OPTIONS
-h Display list of command-line options. -display [display] Use an alternate X Display. -url <Image URL> The URL of the WWW image to monitor. -http <URL> The URL to send to netscape via a Middle double click. -c Center the image vertically within the icon. -delay <Time> The time between updates. The default is about 5 minutes. FILES
The original sized image and the thumbnail XPM image are both stored in ~/.wmGrabImage/ which gets created if it doesnt already exist. SEE ALSO
wget and the ImageMagick convert utility. BUGS
Who knows? -- its still Beta though. (Let me know if you find any). Oldish versions of the ImageMagick convert utility have a memory leak -- if you have that problem, upgrade to the latest version. AUTHOR
Michael G. Henderson <mghenderson@lanl.gov> 16 December 1998 WMGRABIMGAE(1)
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