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Old 03-03-2008, 01:49 AM   #1
Michael99
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Registered: Mar 2008
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Get stdout from a running program back to screen


Hello everybody!
I started at home a program in the background using 'setsid <program>'. Now I am at the university and I wanted to see the output the program is writing. Is it somehow possible to know, what the program is writing to stdout (and stderr) at the moment? I forgot to use something like 'setsid <program>|tee ProgOut.txt' or similiar...
Thanks for your help!
Michael
 
Old 03-03-2008, 02:58 AM   #2
raskin
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I think the best (though also unnatural a bit) is using strace -p. It can be instructed to trace writes to file descriptors 1 and 2, and ‘‘-p [pid]’’ attaches it to already running program. Read its manual, maybe
Code:
strace -f -o log -s 1024 -p $(pgrep program)
will be enough for you.
 
Old 03-03-2008, 04:43 AM   #3
Michael99
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Quote:
Originally Posted by raskin View Post
I think the best (though also unnatural a bit) is using strace -p. It can be instructed to trace writes to file descriptors 1 and 2, and -p [pid] attaches it to already running program. Read its manual, maybe
Code:
strace -f -o log -s 1024 -p $(pgrep program)
will be enough for you.
Great, thanks a lot!
 
  


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