5

As we know, with systemd, core dumps don't just get written to the current directory but to some obscure journal. Now, I'm a poor old non-root user on some machine, and - I want my core dumps! I can't follow the suggestions to edit files in /etc or run systemd utilities as root. Can I still get my core dump files somehow?

PS - If it matters, I'm on Fedora 22.

7

Use systemd's coredumpctl to list and retrieve your core dumps. Use the PID or name of the program to select one to dump (to file -o ...) or to run gdb on.

$ coredumpctl list
TIME                            PID   UID   GID SIG PRESENT EXE
Mon 2016-04-11 11:18:23 CEST  21538  1000  1000  11 * /usr/bin/sleep
$ coredumpctl info 21538
           PID: 21538 (sleep)
           UID: 1000 (meuh)
           ...
$ coredumpctl -o core dump sleep
$ coredumpctl gdb 21538

(Some intermediate versions of systemd use the name systemd-coredumpctl). Your userid must be in group systemd-journal to be able to do this without becoming root.

  • I take it I need to specify some list index instead of "dump" in your second line? – einpoklum Apr 11 '16 at 8:56
  • Yes, you need to provide a "match", eg the program that core dumped, or its process id etc. – meuh Apr 11 '16 at 9:36

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