saini_er
asked on
How can I pipe xevent viewer (xev) output to file completely?
I am using xev to note down all pressed key events but unfortunately after pipeline output to file , I always found last few presses keys missing...
I am using like
xev -id 0x3200020 >testout
I typed sentence --> full sentence
here in xev output last two alphabet 'c' and 'e' are missing from pipeline
xev-output
I am using like
xev -id 0x3200020 >testout
I typed sentence --> full sentence
here in xev output last two alphabet 'c' and 'e' are missing from pipeline
xev-output
Hi,
this seems to be a consequence of stdout buffering.
As I believe, the only solution is to wait for the timeout or to stop xev gracefully.
wmp
SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
ASKER
I am using xev as integration im my code..I am already opening child process for that .I can't open new window with screen
Hi,
so, in your child process, do you see a chance to terminate xev gracefully in certain intervals (and then start it anew) to give its stdout the chance to get fflushed?
wmp
so, in your child process, do you see a chance to terminate xev gracefully in certain intervals (and then start it anew) to give its stdout the chance to get fflushed?
wmp
SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
ASKER
Basically , I am using perl program to execute xev for particular terminal window and then I am using `killall -9 xev` to terminate program..My perl program is interactive program which requires user input and I am integrating xev to capture all user activity on keyboard.....So I am looking for some good procedure which can flush the buffer of xev before it terminated the program
ASKER
Hi folks
I would like to thank everyone for thier suggestion.Finally I came up with couple of ideas to resolve this problem for which I need your input
OPTION1-> Is there any way that I can execute 'Returnk key' escape sequence from perl program. If We can execute retun key from perl program , then I can have changes in my code to ignore last return key.
OPTION2-> Is there any switch cases available in Perl like c where I can ask user to press return key to exit program
I would like to thank everyone for thier suggestion.Finally I came up with couple of ideas to resolve this problem for which I need your input
OPTION1-> Is there any way that I can execute 'Returnk key' escape sequence from perl program. If We can execute retun key from perl program , then I can have changes in my code to ignore last return key.
OPTION2-> Is there any switch cases available in Perl like c where I can ask user to press return key to exit program
The problem is that you terminate it with 'kill -9' which leaves no chance to xev to flush its buffer!
ASKER
No I have tested this already..basically If I press two return key in the end of program with sleep(3) , it clears the buffer and I am getting my all keys.
I just want some procedure using escape sequences that my program with press return key two times
I just want some procedure using escape sequences that my program with press return key two times
ASKER
I am using killall xev and not the forceful -9 option.sorry for confusion
SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
ASKER CERTIFIED SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
xev > file