Shell Programming and Scripting

Team,

Presently i am trying to do basic checks on my my-sql cluster boxes.
The command ndb_mgm checks for the cluster environment details by typing the show command, and exit to come out of the ndb_mgm command.
Rather, than typing i have made a script abc.sh with the below contents in the below details

Code:

more abc.sh
/opt/app/abc/mysql/bin/ndb_mgm < <(yes show)

Here, once i run the script, the above command goes into iteration, and the details of show are shown on the screen in a continuous process,
(i.e:the same data is shown repetedly).Hence i just want to show it once on the screen and do the exit in-order for me to come out of the ndb_mgm command
Can anyone advise me ?

Regards
Whizkid

quick check of manual shows that ndb_mgm understands commands from command line without I/O redirection:

Code:

ndb_mgm -e "SHOW"

Did you consider a "here string" (bashism) or a "here document"? Both are available on several recent shells, but not on sh

Thanks agent.kgb it worked out for me.
Between Rudi. could you please elaborate as to what needs to be done..(any example)

If ndb_mgm - which I don't have at hand to prove the concept - reads from stdin, as read does, you could adapt this one:

Code:

LF=$'\n'
while read A B REST; do echo $A $B $REST; done <<< "Hello $LF ABC CDE$LF A B C" 
Hello
ABC CDE
A B C
while read A B REST; do echo $A $B $REST; done <<< "show${LF}exit" 
show
exit