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Full Discussion: bin bash decimal compare
Top Forums Shell Programming and Scripting bin bash decimal compare Post 302678115 by drl on Friday 27th of July 2012 09:10:05 AM
Old 07-27-2012
Hi.

Note that some non-numeric characters might be found in some v.r.l strings:
Code:
       The version is always described with a triple <version,revision,level>
       and is represented by a string which always matches the regular
       expression ""[0-9]+\.[0-9]+[sabp.][0-9]+"".

-- excerpt from man shtool-version

although I have not seen the sabp in, for example, the apache2 version on my system. An example from the man page is 1.2b3

I have seen instances where an underline is used: java version "1.6.0_22"

Best wishes ... cheers, drl
This User Gave Thanks to drl For This Post:
 

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SHTOOL-VERSION.TMP(1)					      GNU Portable Shell Tool					     SHTOOL-VERSION.TMP(1)

NAME
shtool-version - GNU shtool maintain version information file SYNOPSIS
shtool version [-l|--language lang] [-n|--name name] [-p|--prefix prefix] [-s|--set version] [-e|--edit] [-i|--increase knob] [-d|--display type] file DESCRIPTION
This command displays and maintains version information in file. The version is always described with a triple <version,revision,level> and is represented by a string which always matches the regular expression ""[0-9]+.[0-9]+[sabp.][0-9]+"". The hexadecimal format for a version "v.rtl" is "VVRRTLL" where "VV" and "RR" directly correspond to "v" and "r", "T" encodes the level type as 9, 2, 1, 0 (representing "s", "p"/".", "b", "a" in this order) and "LL" is either directly corresponding to "l" or set to 99 if level type is "s". OPTIONS
The following command line options are available. -v, --verbose Print verbose information during processing. -l, --language lang Choose format of version file file. lang=""txt"", ANSI C (lang="c"), M4 (lang="m4"), Perl (lang="perl") or Python (lang="python"). Default is "txt". -n, --name name Name the program the version is maintained for. Default is "unknown". -p, --prefix prefix =item -s, --set version Set the version to version. -e, --edit Interactively enter a new version. -i, --increase knob When option ``-i'' is used, the current version in file is updated by increasing one element of the version where knob can be one of the following: ``"v"'' for increasing the version by 1 (and resetting revision and level to 0), ``"r"'' for increasing the revision by 1 (and resetting level to 0) or ``"l"'' for increasing the level by 1. -d, --display type Control the display type: ""short"" for a short version display, ""long"" for a longer version display, ""hex"" for a hexadecimal display of the version and ""libtool"" for a format suitable for use with GNU libtool. EXAMPLE
# shell script shtool version -l c -n FooBar -p foobar -s 1.2b3 version.c # configure.in V=`shtool version -l c -d long version.c` echo "Configuring FooBar, Version $V" HISTORY
The GNU shtool version command was originally written by Ralf S. Engelschall <rse@engelschall.com> in 1994 for OSSP eperl. It was later rewritten from scratch for inclusion into GNU shtool. SEE ALSO
shtool(1). 18-Jul-2008 shtool 2.0.8 SHTOOL-VERSION.TMP(1)
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