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Full Discussion: Nmap shell script goes in infinite loop
Top Forums Programming Nmap shell script goes in infinite loop Post 302998127 by Don Cragun on Thursday 25th of May 2017 03:22:46 PM
Old 05-25-2017
With your code:
Code:
while read -r line
do
name="$line"
echo "$name"
count=$line

nmap -oG output.txt -T4 -f -iL iplist.txt $line1
done < iplist.txt

you have three names for the contents of a line from iplist.txt: line, name, and count. But in your invocation of nmap you use $line1. Since line1 has not been defined in your script anywhere, that will expand to an empty string unless line1 is an exported variable in your environment.

I don't have nmap on my system. The Linux nmap man page isn't clear about what servers(s) it attempts to scan if no targets are given on the command line. Maybe it seems like an infinite loop because you are trying to scan every server on the internet???
 

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LEARN ABOUT CENTOS

xnmap

ZENMAP(1)						      Zenmap Reference Guide							 ZENMAP(1)

NAME

       zenmap - Graphical Nmap frontend and results viewer

SYNOPSIS

       zenmap [options] [results file]

DESCRIPTION

       Zenmap is a multi-platform graphical Nmap frontend and results viewer. Zenmap aims to make Nmap easy for beginners to use while giving
       experienced Nmap users advanced features. Frequently used scans can be saved as profiles to make them easy to run repeatedly. A command
       creator allows interactive creation of Nmap command lines. Scan results can be saved and viewed later. Saved scan results can be compared
       with one another to see how they differ. The results of recent scans are stored in a searchable database.

       This man page only describes the few Zenmap command-line options and some critical notes. A much more detailed Zenmap User's Guide is
       available at http://nmap.org/book/zenmap.html. Other documentation and information is available from the Zenmap web page at
       http://nmap.org/zenmap/.

OPTIONS SUMMARY

       -f, --file results file
	   Open the given results file for viewing. The results file may be an Nmap XML output file (.xml, as produced by nmap -oX) or a Umit scan
	   results file (.usr). This option may be given more than once.

       -h, --help
	   Show a help message and exit.

       -n, --nmap Nmap command line
	   Run the given Nmap command within the Zenmap interface. After -n or --nmap, every remaining command line argument is read as the
	   command line to execute. This means that -n or --nmap must be given last, after any other options. Note that the command line must
	   include the nmap executable name: zenmap -n nmap -sS target.

       -p, --profile profile
	   Start with the given profile selected. The profile name is just a string: "Regular scan". If combined with -t, begin a scan with the
	   given profile against the specified target.

       -t, --target target
	   Start with the given target. If combined with -p, begin a scan with the given profile against the specified target.

       -v, --verbose
	   Increase verbosity (of Zenmap, not Nmap). This option may be given multiple times to get even more verbosity.

       Any other arguments are taken to be the names of results files to open.

ENVIRONMENT VARIABLES

       ZENMAP_DEVELOPMENT
	   Set ZENMAP_DEVELOPMENT to disable automatic crash reporting.

BUGS

       Like their authors, Nmap and Zenmap aren't perfect. But you can help make them better by sending bug reports or even writing patches. If
       Nmap or Zenmap doesn't behave the way you expect, first upgrade to the latest version available from http://nmap.org. If the problem
       persists, do some research to determine whether it has already been discovered and addressed. Try Googling the error message or browsing
       the nmap-dev archives at http://seclists.org/. Read this full manual page as well. If nothing comes of this, mail a bug report to
       <dev@nmap.org>. Please include everything you have learned about the problem, as well as what version of Zenmap you are running and what
       operating system version it is running on. Problem reports and Zenmap usage questions sent to dev@nmap.org are far more likely to be
       answered than those sent to Fyodor directly.

       Code patches to fix bugs are even better than bug reports. Basic instructions for creating patch files with your changes are available at
       https://svn.nmap.org/nmap/HACKING. Patches may be sent to nmap-dev (recommended) or to Fyodor directly.

HISTORY

       Zenmap was originally derived from Umit, an Nmap GUI created during the Google-sponsored Nmap Summer of Code in 2005 and 2006. The primary
       author of Umit was Adriano Monteiro Marques. When Umit was modified and integrated into Nmap in 2007, it was renamed Zenmap.

AUTHORS

   Nmap
       Fyodor <fyodor@nmap.org> (http://insecure.org)

       Hundreds of people have made valuable contributions to Nmap over the years. These are detailed in the CHANGELOG file which is distributed
       with Nmap and also available from http://nmap.org/changelog.html.

   Umit
       Zenmap is derived from the Umit Nmap frontend, which was started by Adriano Monteiro Marques as an Nmap/Google Summer of Code project
       (<py.adriano@gmail.com>, http://www.umitproject.org).

Zenmap								    07/28/2013								 ZENMAP(1)
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