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Top Forums Shell Programming and Scripting Convert ip ranges to CIDR netblock Post 303027819 by vgersh99 on Tuesday 25th of December 2018 10:23:52 AM
Old 12-25-2018
Quote:
Originally Posted by azdps
I'm using OpenBSD that uses awk source coding dating back to 2011. gawk is not in the base install of OpenBSD because of the GNU licensing so it has to be installed as a package. When I run the script iprange2cidr.awk using awk I get a segmentation fault. I'm curious if someone can change the script to avoid the fault. I've isolated the line in the script that causes the fault:

Code:
if (newip < ipEnd) result = range2cidr(newip + 1, ipEnd,result)

If I remove the above listed code, awk will still process a file containing 230k lines of data without a segmentation fault but the output would obviously be wrong. Any suggestions on how this line might be changed to accommodate OpenBSD's awk version?

At the bottom of the OpenBSD awk man page the bug section advises the following:



Any suggestions?
It can be anything including improper handling of the recursive call to range2cidr.

You can try this mod, but it's difficult to guess what the issue might be:
Code:
if (newip+0 < ipEnd+0) result = range2cidr(newip + 1, ipEnd,result)

Can you install gawk?
 

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URLCODING(3)						 libbash urlcoding Library Manual					      URLCODING(3)

NAME
urlcoding -- a Libbash library for encoding and decoding URL's. SYNOPSIS
urlEncodeString [-l] <STRING> urlEncodeFile [-l] <FILE> urlEncodeStream [-l] urlDecodeString <STRING> urlDecodeFile <FILENAME> urlDecodeStream DESCRIPTION
urlcoding is a collection of functions that convert ASCII-text to standard URL's and vice-versa. The AWK code used is based on code by Heiner Steven <heiner.steven@odn.de> The function list: urlEncodeString Creates a URL from an ASCII string urlEncodeFile Converts a file into URL-valid text urlEncodeStream Converts standard input into URL-valid text urlDecodeString Converts a URL-encoded text back to a plain-text form urlDecodeFile Coverts URL-encoded text in a file back to plain text urlDecodeStream Converts URL-encoded standard input to text Detailed interface description follows. The [-l] option for the encoding functions should be used when line-feed characters (' ') are to be encoded as well. All functions print the results of their conversions to standard output. The exit status of all functions is that of the command 'awk', with '0' for success FUNCTIONS DESCRIPTIONS
urlEncodeString [-l] <STRING> Converts STRING - a string of ASCII characters - to URL. urlEncodeFile [-l] <FILE> Coverts FILE of URL-encoded text to plain text urlEncodeStream [-l] Converts text from standard input to URL-text. urlDecodeString <STRING> Converts URL-encoded string STRING back to text. urlDecodeFile <FILENAME> Converts the URL-encoded text in FILE to plain text. urlDecodeStream Converts the URL-encoded text from standard input to plain-text AUTHORS
Alon Keren <alon.keren@gmail.com> SEE ALSO
ldbash(1), libbash(1) Linux Epoch Linux
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