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peekfd − peek at file descriptors of running processes |
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peekfd [−8,−−eight−bit−clean] [−n,−−no−headers] [−f,−−follow] [−d,−−duplicates−removed] [−V,−−version] [−h,−−help] pid [fd] [fd] ... |
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peekfd attaches to a running process and intercepts all reads and writes to file descriptors. You can specify the desired file descriptor numbers or dump all of them. |
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-8 |
Do no post-processing on the bytes being read or written. |
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-n |
Do not display headers indicating the source of the bytes dumped. |
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-c |
Also dump the requested file descriptor activity in any new child processes that are created. |
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-d |
Remove duplicate read/writes from the output. If you’re looking at a tty with echo, you might want this. |
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-v |
Display a version string. |
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-h |
Display a help message. |
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/proc/*/fd |
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Not used but useful for the user to look at to get good file descriptor numbers. |
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None. |
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The following diagnostics may be issued on stderr: Error attaching to pid ... |
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An unknown error occured while attempted to attach to a process.. you may need to be root. |
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Probably lots. Don’t be surprised if the process you are monitoring dies. |
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Trent Waddington <trent.waddington@gmail.com> |
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ttysnoop(8) |