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42 lines
1.8 KiB
Text
42 lines
1.8 KiB
Text
mawk (fast awk implementation)
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mawk (Mike's AWK) is an interpreter for the AWK Programming Language. It's
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a very fast AWK implementation based on a bytecode interpreter. Originally
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written by Mike Brennan, mawk is currently maintained by Thomas E. Dickey.
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The AWK language is useful for manipulation of data files, text
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retrieval and processing, and for prototyping and experimenting with
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algorithms. mawk is a new awk meaning it implements the AWK language as
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defined in Aho, Kernighan and Weinberger, The AWK Programming Language,
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Addison-Wesley Publishing, 1988.
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mawk conforms to the Posix 1003.2 (draft 11.3) definition of the AWK
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language which contains a few features not described in the AWK book,
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and mawk provides a small number of extensions.
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This build does not conflict with Slackware's own awk (from the gawk
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package).
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By default, mawk is built using its own built-in regular expression
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engine. There are some slight differences between this and the glibc
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regular expression engine:
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- Embedded NUL characters are supported by the built-in engine. For
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instance, you can use the hex escape \x00 to match a NUL character.
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glibc regexes don't support this.
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- POSIX brace syntax is NOT supported by the built-in engine. For
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instance, /a{3}/ to match "aaa" but not "a" or "aa". glibc regexes do
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support this.
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If you require the glibc engine, export BUILTIN_REGEX=no in the script's
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environment.
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The default version in the .info file is 1.3.4, which is a stable release
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from 2009. If you'd like to (or need to) build one of the newer 'snapshot'
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releases, get the source from ftp://ftp.invisible-island.net/mawk/
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and export VERSION in the environment. Notice the filenames look like
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e.g. "mawk-1.3.4-20171017.tgz". Slackware version numbers can't contain
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the hyphen, so use an underscore instead. Example:
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# export "VERSION=1.3.4_20171017"
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