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Full Discussion: Please explain read in a while loop
Top Forums Shell Programming and Scripting Please explain read in a while loop Post 95493 by jerardfjay on Wednesday 11th of January 2006 04:23:55 PM
Old 01-11-2006
Quote:
Originally Posted by bhargav
Code:
count=`wc -l file1 | tr -s " " | cut -d" " -f 2`
echo $count

while test $count -gt 0
do
    echo "Enter input :"
    read input
    echo $input
    ((count=count-1))
done

Bhargav,

I need to read input from user for every line that I read from the testfile. How would I accomplish that. Your example does not involve the loop reading from a file as well as reading user input within the loop of reading from a file. I use the $line variable within the loop to extract data that I require for other purposes.

Code:
while read line
do
    var1=$(echo "${line}" | awk -F "|" '{print $2}' | sed -e 's/^ *//g;s/ *$//g')
    read input?"Enter value :"      <<<---- This read does not work
    echo $input
#    do some processing with $var1 and $input and continue 
done < testfile

Any thoughts?
Jerardfjay
Last edited by jerardfjay; 01-11-2006 at 05:27 PM.. Reason: clarification of reply
 

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LEARN ABOUT SUSE

tping

TPING(1)							   LAM COMMANDS 							  TPING(1)

NAME

       tping - Send echo messages to LAM nodes.

SYNOPSIS

       tping [-hv] [-c count] [-d delay] [-l length] nodes

OPTIONS

       -h	     Print the command help menu.

       -v	     Turn OFF verbose mode.

       -c count      Send count messages.

       -d delay      Delay delay seconds between each message.

       -l length     Each message is length bytes long.

DESCRIPTION

       The  tping  command  sends  messages  to,  and  collects replies from, a list of nodes, via the LAM echo server.  It is similar to the UNIX
       ping(8) command, and is used as a quick diagnosis of the LAM network.

       Unless options are specified, tping sends a 1 byte message an infinite number of times, displaying the roundtrip time of each message as it
       completes,  with  a delay of 1 second between roundtrips.  After the loop is broken (with keyboard interrupt, eg: ^C), tping prints statis-
       tics about all roundtrip messages.

EXAMPLES

       tping h
	   Echo messages to the local node.

       tping -v n7 -l 1000 -c 10
	   Echo 1000 byte messages to node 7.  Stay silent while working.  Stop after 10 roundtrips and report statistics.

BUGS

       There is no built-in timeout and tping will wait forever to receive an echo.  If no echo is received, due to a dead  link  or  node,  tping
       hangs.	Stop  the  process  with  a  keyboard suspend signal (eg: ^Z) and terminate LAM with lamhalt(1) or lamwipe(1) (although the use of
       lamwipe(1) is deprecated).

SEE ALSO

       lamhalt(1), lamwipe(1)

LAM 7.1.4							    July, 2007								  TPING(1)
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