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Top Forums Shell Programming and Scripting Redirect output of command line to for loop Post 302753251 by radoulov on Tuesday 8th of January 2013 10:06:50 AM
Old 01-08-2013
Code:
$ sqlplus -S <<! | while read; do printf 'line: %s\n' "$REPLY"; done
> / as sysdba
> select sysdate from dual;
> !
line:
line: SYSDATE
line: ---------
line: 08-JAN-13
line:

Or:
Code:
$ sqlplus -S <<! |
> / as sysdba
> select sysdate from dual;
> !
> while read; do
>   printf 'line: %s\n' "$REPLY"
> done
line:
line: SYSDATE
line: ---------
line: 08-JAN-13
line:

In your case it would be something like this:
Code:
"$HOME"/sqlplus << EOF | 
command
select * from xyz;
exit
EOF 
while IFS= read -r; do
  printf '%s\n' "$REPLY" | grep whatever
done

P.S. Drop the -r option of read if your shell doesn't support it.

Last edited by radoulov; 01-08-2013 at 11:12 AM..
This User Gave Thanks to radoulov For This Post:
 

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GRC(1)							      General Commands Manual							    GRC(1)

NAME
grc - frontend for generic colouriser grcat(1) SYNOPSIS
grc [options] command [args] DESCRIPTION
grc will execute command command with optional parameters [args] piping its stdout or stderr into grcat, with apropriate configuration file. Configuration file for grc is determined by /etc/grc.conf file. Format of /etc/grc.conf: each entry consists of 2 lines, between entries there can be any number of empty lines or lines beginning with # (comments) First line is regular expression, second line the name of configuration file for grcat. Configuration file after the first regular expression matching command [args] will be passed to grcat as its configuration file OPTIONS
--help Show summary of options. --version Display version. -e --stderr Redirect error output. Unless -s is selected as well, this cancels redirection of standard output via grcat -s --stdout Redirect standard output. Used to redirect standard output together with --stderr option. --colour=x x is one of on off auto --colour=on will colourise (default) --colour=off will just execute command without colourising. --colour=auto will test if standard output is a tty, and colourise only when it is. SEE ALSO
grcat(1) AUTHOR
Written by Radovan Garabik <garabik @ kassiopeia.juls.savba.sk> GRC(1)
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