Hello everyone,
I would like some help on an issue I have related to the read command with ksh93 (Unix AIX).
I want to implement a 'press any key to exit' scenario.
I have the following code:
Code:
STTY=$(stty -g)
if [ -t 0 ];then
stty -echo -icanon time 0 min 0
fi
k=""
while [[ "x$k" = "x" ]];do
read k
# following is a group of command that retrieve data from several files
# and process the data summarizing and filtering it (using awk).
# This section could possibly take 1 to 2 seconds to complete its job
# the final command does a cat of the generated data file to the screen
# then the loop would start again retrieving fresh stats from files....
........
done
stty $STTY
When I execute the code and press any key while it is executing, sometimes it exits properly, other times it takes more than one key press to exit, maybe because the key got pressed while the processing section of the loop was running. What could be 'chewing up' the pressed keystroke?
Do you have suggestions on how to guarantee termination on a single key stroke?
Maybe I need to redesign my loop logic ?
I am open to any advice and suggestion.
Thanks to all!
Hi All,
I'm creating a program which reads millions of bytes from the PIPE and do some processing. As the data is more, the idea is to read the pipe parallely.
Sun Solaris 8
See the code below:
#!/bin/sh
MAXTHREAD=30
awk '{print $1}' metadata.csv > nvpipe &
while
do
... (3 Replies)
Hi expert,
How do i exit to while read, below is the script.
I need to exit after execute echo or command.
or any scripts that can search two patterns and if they found any patterns execute the command and exit.
Thanks a lot..
tail -fn0 /tmp/test.log | \
while read line ; do
... (12 Replies)
Hi all,
I have a situation to read exit value of a command (not exit code) and process further.
bash-4.2$ returnvalue=`ssh DOMAIN\\\\user1@10.7.7.68 'cmd /c "del C:\Users\user1\db_test.bak"'`
Could Not Find C:\Users\user1\db_test.bak
bash-4.2$ echo $?
0
bash-4.2$ echo $returnvalue... (3 Replies)
Hi searched hi and wide for this with no luck.
Maintaining a bash script that
#!/usr/bin/bash
#does some stuff like setting env etc.
f_do_dbwork
...
..
#Now I want to exit with the value of $err however $err is re-initialised to 0 on exiting the function
Always 0
....
... (3 Replies)
Hi,
Want to log the output of command & check the exit status to find whether it succeeded or failed.
> ls abc
ls: abc: No such file or directory
> echo $?
1
> ls abc 2>&1 | tee log
ls: abc: No such file or directory
> echo $?
0
Tee commands changes my exit status to be always... (7 Replies)
The following is a piece of code to rename LOG_FILE_NEW to LOG_FILE once you get a result (either RUNNING or SHUTDOWN)
RESULT=""
sleep 30
while ; do
sleep 10
RESULT=`sed -n '/RUNNING/'p ${LOG_FILE_NEW}`
if ; then
RESULT=`sed -n '/SHUTTING_DOWN/'p ${LOG_FILE_NEW}`
fi
done
mv... (3 Replies)
i have script like:
echo "enter name"
read a
I do not want to press enter key
i have tried with ascill of enter as (\013) but still it wait for enter ,
please resolve my problem (2 Replies)
i have written a shell script that invokes main class of a java prg. the java prg does a System.exit(0) or (1) based on condition. how can i read or check the status in unix.... (4 Replies)
Hi ,
I do the following :
]echo "Do you want to say yes or no ?(y/n):\c"
read ans
here 'n' is the default value.that means if the user press ENTER key then it should be 'n' .
Now how do i know that the user has pressed ENTER key.What will be stored in my variable 'ans'. (4 Replies)
I would really like to have a script that will accept the key press from the user with out having to press the enter key afterwards.
i.e.
echo "Press Y to print \c"
read YesNo
At this point the user has to press the enter key to continue. Is there a way to accept the key press from the... (3 Replies)
