问题描述
我正在尝试从rootfs提供对coredump文件生成的支持，我已经使用"ulimit -c unlimited"命令和"* hard core -1"修改了/etc/limits文件，现在当我给kill -6 $时$，期望生成核心文件，但要获取此核心文件，必须显式运行ulimit -c unlimited.
I am trying to provide support for coredump file generation from my rootfs ,I have modified /etc/limits file with "ulimit -c unlimited" command and "* hard core -1" ,Now when I give kill -6 $$ ,expecting core file generation but to get this core file have to run ulimit -c unlimited explicitly .
但是我希望它自动发生，而无需在shell中再次运行ulimit -c unlimited.
But I want it to happen automatically , no need to run ulimit -c unlimited it again in shell.
任何人都可以告诉我要进行相同的更改
Can anybody tell me what changes I have to make for the same to happen
推荐答案
在程序中，您可以使用setrlimit(RLIMIT_CORE, ...)设置核心文件的最大大小.要指定无限大小，请通过RLIM_INFINITY.
From a program you can use setrlimit(RLIMIT_CORE, ...) to set the core file's maximum size. To specify an infinite size pass RLIM_INFINITY.
有关此信息的详细信息，请在这里阅读: http ://manpages.debian.net/cgi-bin/man.cgi?query = getrlimit& sektion = 2
For details on this please read here: http://manpages.debian.net/cgi-bin/man.cgi?query=getrlimit&sektion=2
您可以使用sysctl命令
sysctl kernel.core_pattern=/var/core/core.%p
让内核在/var/core中创建名为core.<pid>的内核.
to have the kernel create cores named core.<pid> in /var/core.
在/etc/sysctl.conf中添加kernel.core_pattern=/var/core/core.%p使其成为永久性. (运行sysctl -p以处理对/etc/sysctl.conf的更改)
Adding kernel.core_pattern=/var/core/core.%p to /etc/sysctl.conf makes it permanent. (run sysctl -p to process your changes to /etc/sysctl.conf)
在%p(用于进程ID)之外，还有其他占位符，如下所示(从此处获取):
Besides %p (for the process id) there are other placeholders as follows (taken from here):
%% 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 exclamation marks ('!').
%c core file size soft resource limit of crashing process (since Linux 2.6.24)
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