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Full Discussion: Parsing a control file loop
Top Forums Shell Programming and Scripting Parsing a control file loop Post 303017345 by MadeInGermany on Monday 14th of May 2018 01:23:39 PM
Old 05-14-2018
The following file has another separator at the end of the command field
Code:
RHEL:syslogd:sed -i '/^syslogd/ a*ACTION /etc/init.d/syslog start/' $CFG_DIR/ps_mon.cfg:
RHEL:ntpd:"sed -i '/^ntpd/ a*ACTION \/etc\/init.d\/ntpd start/' $CFG_DIR/ps_mon.cfg:
RHEL:scopeux:"sed -i '/^scopeux/ a*ACTION /opt/perf/bin/ovpa start all/' $CFG_DIR/ps_mon.cfg:

SUSE:cron:"sed -i '/^cron/ a*ACTION /etc/init.d/cron start/' $CFG_DIR/ps_mon.cfg:
SUSE:scopeux:"sed -i '/^scopeux/ a*ACTION /opt/perf/bin/ovpa start all/' $CFG_DIR/ps_mon.cfg:
SUSE:midaemon:"sed -i '/^midaemon/ a*ACTION /opt/perf/bin/ovpa start all/' $CFG_DIR/ps_mon.cfg:

HP-UX:scopeux:file=$CFG_DIR/ps_mon.cfg; sed 's/^scopeux/ a\
*ACTION /opt/perf/bin/ovpa start all' "$file" > "$file".tmp && mv "$file".tmp "$file":
HP-UX:midaemon:file=$CFG_DIR/ps_mon.cfg; sed '/^midaemon/ a\
*ACTION /opt/perf/bin/ovpa start all' "$file" > "$file".tmp && mv "$file".tmp "$file":
HP-UX:perfalarm:file=$CFG_DIR/ps_mon.cfg; sed '/^perfalarm/ a\
*ACTION /opt/perf/bin/ovpa start all' "$file" > "$file".tmp && mv "$file".tmp "$file":

It can be parsed by the following Bourne-compatible shell script
Code:
#!/bin/sh
PATH=/bin:/usr/bin
sep=":"
while IFS=$sep read -r f1 f2 f3
do
  [ -n "$f1" ] || continue
  cmd=$f3
  while
    case $cmd in
    (*$sep) break;;
    esac
  do
    read line
    cmd="$cmd
$line"
  done
  cmd=`expr X"$cmd" : X"\(.*\)$sep"` 
  echo "\
field1 = $f1
field2 = $f2 
cmd = $cmd"
done

The good thing is, the command can contain any characters: \n or newlines, and all quoting characters, and even the : character!
NB the shell script reads from stdin. Run it with /bin/sh /path/to/script < input_file.
Last edited by MadeInGermany; 05-14-2018 at 02:43 PM..
This User Gave Thanks to MadeInGermany For This Post:
The Gamemaster
 

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LEARN ABOUT DEBIAN

shtool-subst

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

NAME

       shtool-subst - GNU shtool sed(1) substitution operations

SYNOPSIS

       shtool subst [-v|--verbose] [-t|--trace] [-n|--nop] [-w|--warning] [-q|--quiet] [-s|--stealth] [-i|--interactive] [-b|--backup ext]
       [-e|--exec cmd] [-f|--file cmd-file] [file] [file ...]

DESCRIPTION

       This command applies one or more sed(1) substitution operations to stdin or any number of files.

OPTIONS

       The following command line options are available.

       -v, --verbose
	   Display some processing information.

       -t, --trace
	   Enable the output of the essential shell commands which are executed.

       -n, --nop
	   No operation mode. Actual execution of the essential shell commands which would be executed is suppressed.

       -w, --warning
	   Show warning on substitution operation resulting in no content change on every file. The default is to show a warning on substitution
	   operations resulted in no content change on all files.

       -q, --quiet
	   Suppress warning on substitution operation resulting in no content change.

       -s, --stealth
	   Stealth operation. Preserve timestamp on file.

       -i, --interactive
	   Enter interactive mode where the user has to approve each operation.

       -b, --backup ext
	   Preserve backup of original file using file name extension ext.  Default is to overwrite the original file.

       -e, --exec cmd
	   Specify sed(1) command directly.

       -f, --file cmd-file
	   Read sed(1) command from file.

EXAMPLE

	#   shell script
	shtool subst -i -e 's;(c) ([0-9]*)-2000;(c) 1-2001;' *.[ch]

	#    RPM spec-file
	%install
	    shtool subst -v -n 
		-e 's;^(prefix=).*;1 $RPM_BUILD_ROOT%{_prefix};g' 
		-e 's;^(sysconfdir=).*;1 $RPM_BUILD_ROOT%{_prefix}/etc;g' 
		`find . -name Makefile -print`
	    make install

HISTORY

       The GNU shtool subst command was originally written by Ralf S.  Engelschall <rse@engelschall.com> in 2001 for GNU shtool.  It was prompted
       by the need to have a uniform and convenient patching frontend to sed(1) operations in the OpenPKG package specifications.

SEE ALSO

       shtool(1), sed(1).

18-Jul-2008							   shtool 2.0.8 					       SHTOOL-SUBST.TMP(1)
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