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Full Discussion: Dynamic variable assignment
Top Forums Shell Programming and Scripting Dynamic variable assignment Post 302973964 by Corona688 on Tuesday 24th of May 2016 01:14:54 PM
Old 05-24-2016
Oh. That's the exact opposite of dynamic, when you know the variable names you want already.
Code:
exec 5<file.csv # Open file into FD 5

# Read first line
IFS="," read VAR1 VAR2 VAR3 VAR4 <&5
# Read second line
IFS="," read VAR1 VAR2 VAR3 VAR4 <&5
# etc

# A loop 
while IFS="," read VAR1 VAR2 VAR3 VAR4 <&5
do
        echo "column 1 is $VAR1"
done

# close file
exec 5<&-

 

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LEARN ABOUT OPENSOLARIS

parse_dynamic_clustertoc

parse_dynamic_clustertoc(1M)				  System Administration Commands			      parse_dynamic_clustertoc(1M)

NAME

       parse_dynamic_clustertoc - parse clustertoc file based on dynamic entries

SYNOPSIS

       cdrom/export/exec/sparc.Solaris_2.x/sbin/install.d/parse_dynamic_clustertoc

       cdrom/export/exec/i386.Solaris_2.x/sbin/install.d/parse_dynamic_clustertoc

DESCRIPTION

       This script parses the  clustertoc file before the suninstall(1M) process is run.  parse_dynamic_clustertoc is called by a modified syscon-
       fig script on the install CD.  When parse_dynamic_clustertoc runs, it reads the clustertoc and when it encounters SUNW_CSRMBRIFF lines,	it
       either  checks  the  platform  using the script's builtin function, or calls an external script.  The script exits with	a 0 if the cluster
       entry is included,  otherwise it will be ignored.  If the cluster entry is to be included, the SUNW_CSRMBRIFF =(test test_arg)cluster  line
       is converted to SUNW_CSRMEMBER =cluster.

EXAMPLES

       Example 1: Checking For an SX Framebuffer

       The  following is an example of a simple external test to check for an SX Framebuffer.  The entry in the  clustertoc file is shown and fol-
       lowing that is the script that must be placed in the  install.d/dynamic_test directory.

       SUNW_CSRMBRIFF=(smcc.dctoc sx)SUNWCsx
       #! /bin/sh
       #
       # Likewise, this file is expected to live under $(TESTDIR).
       #
       case "$1"
       in
	       sx)     prtconf -p  | grep 'SUNW,sx' 1> /dev/null;;
       esac

FILES

       cdrom/Solaris_2.x/locale/C/.clustertoc.dynamic

	   Dynamic version of the  clustertoc file

       cdrom/export/exec/sparc.Solaris_2.x/sbin/install.d/dynamic_test

	   Directory that contains any additional tests

       cdrom/export/exec/i386.Solaris_2.x/sbin/install.d/dynamic_test

	   Directory that contains any additional tests

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SHWPcdrom (Solaris CD)	   |
       +-----------------------------+-----------------------------+

SEE ALSO

       suninstall(1M), clustertoc(4), attributes(5)

SunOS 5.10							    6 Sep 1995					      parse_dynamic_clustertoc(1M)
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