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Top Forums UNIX for Beginners Questions & Answers Replace a field in a comma separated file Post 303044869 by RudiC on Thursday 5th of March 2020 04:00:28 PM
Old 03-05-2020
Two comments:

- the shell does not expand variables enclosed in single quotes. Use double quotes.

- no translation space -> comma needed, just change the field separator in awk's split command.

Like
Code:
$ set -- FN 5 8
$ shift
$ awk -F, -v"FLDS=$*" '
BEGIN                   {FCNT = split(FLDS, FLD, " ")
                        }

function CV(IX)         {TMP = (19+$(IX-1))*1E6 + $(IX)
                         Y   = int(TMP/1E4)
                         return sprintf ("%d-%02d-%02d", Y, int(TMP%Y/100), TMP%100)
                        }

                        {for (i=1; i<=FCNT; i++) $FLD[i] = $FLD[i] ? CV(FLD[i]) : "0001-01-01"  
                        }
1
' OFS=, file
29,A Store,A Street,1,2011-12-13,aaaa,0,1989-12-13
30,B Store,B Street,0,1999-12-13,aaaa,1,2006-12-13
31,C Store,C Street,1,2005-12-13,aaaaa,1,2008-12-13
32,D Store,D Street,0,0001-01-01,aaaa,1,2015-03-23
33,E Store,E Street,1,2012-12-12,bbbb,0,0001-01-01
34,F Store,F Street,1,2010-12-12,cccc,0,1997-12-12


Last edited by RudiC; 03-06-2020 at 11:41 AM..
 

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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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