linux - How to change core pattern only for a particular application? -


my application requires core file generated in specific pattern.

how do without affecting other processes?

and how do when /proc read-only?

man core tells us:

piping core dumps program

since kernel 2.6.19, linux supports alternate syntax /proc/sys/kernel/core_pattern file. if first character of file pipe symbol (|), remainder of line interpreted program executed. instead of being written disk file, core dump given standard input program.

note following points:

  • the program must specified using absolute pathname (or pathname relative root directory, /), , must follow '|' character.

  • the process created run program runs user , group root.

  • command-line arguments can supplied program (since linux 2.6.24), delimited white space (up total line length of 128 bytes).

  • the command-line arguments can include of % specifiers listed above. example, pass pid of process being dumped, specify %p in argument.

you can put script there, e.g.

| /path/to/myscript %p %s %c

you can detect process triggering coredump: (man core):

       %%  single % character        %p  pid of dumped process        %u  (numeric) real uid of dumped process        %g  (numeric) real gid of dumped process        %s  number of signal causing dump        %t  time of dump, expressed seconds since epoch,  1970-01-01            00:00:00 +0000 (utc)        %h  hostname (same nodename returned uname(2))        %e  executable filename (without path prefix)        %e  pathname of executable, slashes ('/') replaced exclama‐            tion marks ('!').        %c  core file size soft resource limit of crashing  process  (since            linux 2.6.24)

now have "do default thing" other processes own


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