[systemd-devel] FixMe need a coredump HOOK

[Leslie Zhai]

Hi Mantas,

Thanks for your reply :)

Yes, I use sd_journal_get_fd() API as Zbigniew mentioned 
https://github.com/AOSC-Dev/FixMe/blob/master/test/test_systemd_journal.c#L22

But sd_journal_get_data print out no such file or directory error 
COREDUMP=ELF 
https://github.com/AOSC-Dev/FixMe/blob/master/test/test_systemd_journal.c#L54

Please someone give me some advice, thanks a lot!

Regards,
Leslie Zhai <xiang.zhai at i-soft.com.cn>


On 2014年06月08日 07:18, Mantas Mikulėnas wrote:
> On Sat, Jun 7, 2014 at 8:49 AM, Leslie Zhai <xiangzhai83 at gmail.com> wrote:
>> [...]
>> But I do NOT know how to hook coredump in user space...
>> I simply cat /proc/sys/kernel/core_pattern
>> |/usr/lib/systemd/systemd-coredump %p %u %g %s %t %e
>>
>> Then systemd-coredump collector will be called (HOOKed), for example,
>> BANG ... segfault occured in user or kernel space. but there is NO dbus
>> interface provided for other App such as bug reporter frontend. so I
>> have to inotify /var/log/journal/SUBDIR
>> https://github.com/AOSC-Dev/FixMe/blob/master/test/qinotify/qinotify.cpp#L99
>>
>> Please someone give me some advice, how to hook coredump in user/kernel
>> space based on systemd or other LIB, thanks a lot!
> inotify is actually the official method for watching journal entries
> -- just not directly, but using the sd_journal_get_fd() API that
> Zbigniew mentioned...
>
>  From <http://www.freedesktop.org/wiki/Software/systemd/journal-files/>:
>> Clients intending to show a live view of the journal should use inotify() for this to watch for files changes.