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ldegio avatar ldegio commented on July 30, 2024

The first issue (only matching when "evt.dir=<") is caused by the fact that when the enter event is parsed, there's neither FD number nor FD name. They are both part of the exit event for open. Since the values are not defined, the filtering system drops the event. I've been thinking about the issue in the past, and I couldn't come up with a good solution. It might be possible to buffer the enter events before feeding them to the filtering system, but that would have not trivial implications in terms of performance and event reordering.

Issue #2 (missing errors) is a bug and I will work on it.

from sysdig.

ldegio avatar ldegio commented on July 30, 2024

I think 6fe5611 should fix the second issue. Can you please try and close the issue if it works as expected?

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brendangregg avatar brendangregg commented on July 30, 2024 
# sysdig -p "%fd.num %fd.name" "evt.type=open and proc.name=df"
3 /etc/ld.so.cache
3 /lib/x86_64-linux-gnu/libc.so.6
3 /usr/lib/locale/locale-archive
3 /etc/mtab
3 /usr/share/locale/locale.alias
-1 /usr/share/locale/en_US.UTF-8/LC_MESSAGES/coreutils.mo
-1 /usr/share/locale/en_US.utf8/LC_MESSAGES/coreutils.mo
-1 /usr/share/locale/en_US/LC_MESSAGES/coreutils.mo
-1 /usr/share/locale/en.UTF-8/LC_MESSAGES/coreutils.mo
-1 /usr/share/locale/en.utf8/LC_MESSAGES/coreutils.mo
-1 /usr/share/locale/en/LC_MESSAGES/coreutils.mo
-1 /usr/share/locale-langpack/en_US.UTF-8/LC_MESSAGES/coreutils.mo
-1 /usr/share/locale-langpack/en_US.utf8/LC_MESSAGES/coreutils.mo
-1 /usr/share/locale-langpack/en_US/LC_MESSAGES/coreutils.mo
-1 /usr/share/locale-langpack/en.UTF-8/LC_MESSAGES/coreutils.mo
-1 /usr/share/locale-langpack/en.utf8/LC_MESSAGES/coreutils.mo
-1 /usr/share/locale-langpack/en/LC_MESSAGES/coreutils.mo
3 /usr/lib/x86_64-linux-gnu/gconv/gconv-modules.cache

Much better, that's expected. Thanks!

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