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Top Forums Shell Programming and Scripting Purpose of "read" and "$END$" in ksh ? Post 302535654 by dbadmin100 on Friday 1st of July 2011 10:43:15 AM
Old 07-01-2011
Purpose of "read" and "$END$" in ksh ?

Hi,

Could anyone please shed some light on the following script lines and what is it doing as it was written by an ex-administrator?

cat $AMS/version|read a b verno d
DBVer=$(/usr/bin/printf "%7s" $verno)


I checked that the cat $AMS/version command returns following output:

Application Release 12.2L01 as of Fri Nov 2 22:11:46 EDT 2007

But when it is being piped through read in the above lines, nothing is available in DBVer parameter when I output using echo $DBVer. Smilie

Also what is the purpose of $END$ as in the following code:

$AMS/bin/procmon testdb << $END$

Thanks
 

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GZEXE(1)						      General Commands Manual							  GZEXE(1)

NAME
gzexe - compress executable files in place SYNOPSIS
gzexe [ name ... ] DESCRIPTION
The gzexe utility allows you to compress executables in place and have them automatically uncompress and execute when you run them (at a penalty in performance). For example if you execute ``gzexe /bin/cat'' it will create the following two files: -r-xr-xr-x 1 root bin 9644 Feb 11 11:16 /bin/cat -r-xr-xr-x 1 bin bin 24576 Nov 23 13:21 /bin/cat~ /bin/cat~ is the original file and /bin/cat is the self-uncompressing executable file. You can remove /bin/cat~ once you are sure that /bin/cat works properly. This utility is most useful on systems with very small disks. OPTIONS
-d Decompress the given executables instead of compressing them. SEE ALSO
gzip(1), znew(1), zmore(1), zcmp(1), zforce(1) CAVEATS
The compressed executable is a shell script. This may create some security holes. In particular, the compressed executable relies on the PATH environment variable to find gzip and some other utilities (tail, chmod, ln, sleep). BUGS
gzexe attempts to retain the original file attributes on the compressed executable, but you may have to fix them manually in some cases, using chmod or chown. GZEXE(1)
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