如何仅为特定应用程序更改核心模式？

Question

我的应用程序需要以特定模式生成核心文件。

如何在不影响其他进程的情况下执行此操作？

当 /proc 为只读时，我该如何执行此操作？

Answer 1

man core 告诉我们：

Piping core dumps to a program

Since kernel 2.6.19, Linux supports an alternate syntax for the /proc/sys/kernel/core_pattern file. If the first character of this file is a pipe symbol (|), then the remainder of the line is interpreted as a program to be executed. Instead of being written to a disk file, the core dump is given as standard input to the program.

Note the following points:

The program must be specified using an absolute pathname (or a pathname relative to the root directory, /), and must immediately follow the '|' character.

The process created to run the program runs as user and group root.

Command-line arguments can be supplied to the program (since Linux 2.6.24), delimited by white space (up to a total line length of 128 bytes).

The command-line arguments can include any of the % specifiers listed above. For example, to pass the PID of the process that is being dumped, specify %p in an argument.

你可以在那里放一个脚本，例如

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

您可以检测哪个进程正在触发核心转储：(man core):

       %%  a 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 as seconds since the Epoch,  1970-01-01
           00:00:00 +0000 (UTC)
       %h  hostname (same as nodename returned by uname(2))
       %e  executable filename (without path prefix)
       %E  pathname of executable, with slashes ('/') replaced by exclama‐
           tion marks ('!').
       %c  core file size soft resource limit of crashing  process  (since
           Linux 2.6.24)

现在您所要做的就是 "do the default thing" 除了您自己的进程

如何仅为特定应用程序更改核心模式？

How to change core pattern only for a particular application?

unix

linux

core