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January 16, 2011 23:29
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How to redirect a running process output to a file and log out
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| ctrl-z | |
| bg | |
| touch /tmp/stdout | |
| touch /tmp/stderr | |
| gdb -p $! | |
| # In GDB | |
| p dup2(open("/tmp/stdout", 1), 1) | |
| p dup2(open("/tmp/stderr", 1), 2) | |
| detach | |
| quit | |
| # Back in shell | |
| disown | |
| logout |
This was linked on Hacker News and in the comments there julian37 pointed out that someone created a bash script to do this called "Dupx".
http://www.isi.edu/~yuri/dupx/
Edit: And of course, thank you to bringing this tool to my attention. Very useful.
@nnutter Got a backup copy of dupx? That link is dead.
Wayback Machine does, https://web.archive.org/web/20170523123913/http://www.isi.edu/~yuri/dupx/
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Thomas, I think you missed the point of the gist. This makes sense if you have a process already running and later realize you need to disown it without losing its output. I for one run into this problem often and I really like this solution.