Sponsored Content
Full Discussion: Controlling user input
Top Forums Shell Programming and Scripting Controlling user input Post 303038291 by Corona688 on Thursday 29th of August 2019 04:55:47 PM
Old 08-29-2019
BASH allows you to use the basic TTY properties to establish timeouts and read minimums:

Code:
#!/bin/bash

# Timeout is 1/10 of a second, minimum read is 0 characters
stty -icanon min 0 time 1

sleep 3 & # Background command

# Eat any characters until 'sleep' quits
while [ -d /proc/"$!" ] ; do read G ; done

wait

printf "%s" "OK, now respond 1 or 2: "

while true
do
        case "$VAR" in
        1|2)    break           ;;
        *)      read VAR        ;;
        esac
done

echo
echo "You responded:  $VAR"

stty sane # Reset terminal to normal

Haven't got it working in KSH yet. Can't convince it to not mess with the TTY.
These 2 Users Gave Thanks to Corona688 For This Post:
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Getting user input

I am trying to create a shell (ksh) which has two "read" commands, one which reads a line from a file and another which is inside a loop that reads user input from a keyboard. However, the "read" command inside the loop uses the input from the file and it does not get the user input from keyboard.... (3 Replies)
Discussion started by: stevefox
3 Replies

2. UNIX for Dummies Questions & Answers

accept user input?

how would i accept user input from the keyboard? (2 Replies)
Discussion started by: JamieMurry
2 Replies

3. Shell Programming and Scripting

Question about user input

Hello all, How can i have a user input that reads like this: echo -n "Please enter a & b:" 10 20 read a read b echo $a echo $b 10 20 right now i have divided it into two echos, like echo -n "a: " echo -n "b: " (1 Reply)
Discussion started by: rrahmegni
1 Replies

4. UNIX for Dummies Questions & Answers

Validating user input

I'm trying to set up a script that takes user input and validates that the user input was entered correctly. So far I have this: while : do echo "Please enter your name." read NAME if then echo "You have not entered a name." echo... (13 Replies)
Discussion started by: fufaso
13 Replies

5. Shell Programming and Scripting

User input - Perl need Help

If I want all user input to start with " : " if not display error or what I asking is how to do if statement that control a first letter of string that we want to start with. and not worry about the rest Thank (1 Reply)
Discussion started by: guidely
1 Replies

6. Shell Programming and Scripting

How to get the user input recursively until the user provides valid input

Hi, echo "Enter file name of input file list along with absolute path : " read inputFileList if then for string in `cat inputFileList` do echo $string done else echo " file does not exist" fi From the above code, if the user enters a invalid file... (1 Reply)
Discussion started by: i.srini89
1 Replies

7. Shell Programming and Scripting

Script interacts with user , based on user input it operates

i have a script which takes input from user, if user gives either Y/y then it should continue, else it should quit by displaying user cancelled. #!/bin/sh echo " Enter your choice to continue y/Y OR n/N to quit " read A if then echo " user requested to continue " ##some commands... (7 Replies)
Discussion started by: only4satish
7 Replies

8. Shell Programming and Scripting

How to validate user's input..?

$Input_filename=$ARGV; if (!-d $Input_filename && ! -e $Input_filename) { print "USAGE: Please enter '$ABCD/def/dsed.txt' as an arguement \n"; exit; } 1. Input Is suppose to be something like "$ABCD/def/dsed.txt". if the input is wrong the script should throw an ERROR message.... (2 Replies)
Discussion started by: Rashid Khan
2 Replies

9. Red Hat

"rhgb quiet" controlling the display of commands in single user mode ?"rhgb quiet" controlling the d

Why does removing "rhgb quiet" from the kernel boot parameters control whether or not the commands I enter are displayed in single user mode ? For instance, if I do not remove "rhgb quiet", when I am in single user mode, whatever command I type will not be displayed on the screen. The... (0 Replies)
Discussion started by: Hijanoqu
0 Replies

10. Shell Programming and Scripting

User input and run awk using the input

I am trying to allow a user to enter in text and then store that text in a variable $gene to run in an awk command in which those values are used to run some calculations. I am getting syntax errors however, when I try. Thank you :). The awk runs great if it is a pre-defined file that is used,... (7 Replies)
Discussion started by: cmccabe
7 Replies
UPSLOG(8)						      Network UPS Tools (NUT)							 UPSLOG(8)

NAME
upslog - UPS status logger SYNOPSIS
upslog -h upslog ups logfile interval [format] DESCRIPTION
upslog is a daemon that will poll a UPS at periodic intervals, fetch the variables that interest you, format them, and write them to a file. The default format string includes variables that are supported by many common UPS models. See the description below to make your own. OPTIONS
-h Display the help message. ups Monitor this UPS. The format for this option is [upsname@]hostname[:port]. logfile Store the results in this file. You can use - for stdout, but upslog will remain in the foreground. interval Wait this many seconds between polls. Remember that a poll is not instantaneous, so it will slip back as the program runs. If you require tighter timing, you should write your own logger using the upsclient library. format The string to log, including variables from the UPS. Valid escapes within this string are: %% - insert a single % %TIME format% - insert the time with strftime formatting %ETIME% - insert the number of seconds, ala time_t. This is now a 10 digit number. %HOST% - insert the local hostname %UPSHOST% - insert the host of the UPS being monitored %PID% - insert the pid of upslog %VAR varname% - insert the value of variable varname The default format string is: %TIME @Y@m@d @H@M@S% %VAR battpct% %VAR utility% %VAR loadpct% [%VAR status%] %VAR upstemp% %VAR acfreq% SERVICE DELAYS
The interval value is merely the number given to sleep() after running through the format string. Therefore, a query will actually take slightly longer than the interval depending on the speed of your system. LOG ROTATION
upslog writes its pid to upslog.pid, and will reopen the log file if you send it a SIGHUP. This allows it to keep running when the log is rotated by an external program. SEE ALSO
Server: upsd(8) Clients: upsc(8), upscmd(8), upsrw(8), upsmon(8) Internet resources: The NUT (Network UPS Tools) home page: http://www.exploits.org/nut/ NUT mailing list archives and information: http://lists.exploits.org/ Wed Oct 16 2002 UPSLOG(8)
All times are GMT -4. The time now is 07:27 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy