Our implementation of vsnprintf for systems where it is missing did not
correctly return a negative value on error, instead returning the size
passed in. We got this code from tcpdump/libpcap, and it was wrong
there, too, though their latest master branch has removed it in favor of
requiring a C99 compiler (C99 guarantees vsnprintf).
This should remove a LGTM code analysis finding (See #1834) of
cpp/constant-comparison in Ncat because we were checking for a negative
return from Snprintf, which would never occur.
If you have trouble updating after this revision you need to follow
these instructions. You have probably just seen an error like this:
svn: URL 'svn://svn.insecure.org/nping' of existing directory 'nping'
does not match expected URL 'svn://svn.insecure.org/nmap/nping'
This is caused by the replacement of SVN externals.
Here's what you need to do. First, save any local changes you might have
in the nping, nsock, nbase, ncat, and zenmap directories. (For example
by running "cd nping; svn diff > ../nping.diff".) If you don't have any
local changes you can skip this step.
Then run these commands:
rm -rf nping/ nsock/ nbase/ ncat/ zenmap/
svn update
svn cleanup
If all else fails, you can just delete your whole working directory and
check out anew:
svn co --username guest --password "" svn://svn.insecure.org/nmap
There may be further discussion in the mailing list thread at
http://seclists.org/nmap-dev/2011/q4/303.
