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46eb0fed75554a03acbd72c7c4e89acd49cfe804
Although $((arithmetic expansion)) is POSIX-specified, some systems have non-POSIX System V shell, which can't handle it. This patch replaces $((something)) with $(expr something) to fix compatibility. This actually slows things down considerably, since a subshell must be launched for each increment operation, but the tests aren't that critical. Bug report: http://seclists.org/nmap-dev/2013/q4/198
Here is some documentation for Nmap, but these files are much less comprehensive than what you'll find at the actual Nmap documentation site ( http://nmap.org ).
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