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java & signal process

java & signal process# Java - 爪哇娇娃

x*o2009-01-06 08:01

1 楼

dose java has signal process like unix system call.
For example, if i run a java program in a jvm and send -9 to the running
process,
how to let the java program responses to -9 signal?
Thanks,

x*o2009-01-06 08:01

2 楼

re

【在 x******o 的大作中提到】

: dose java has signal process like unix system call.
: For example, if i run a java program in a jvm and send -9 to the running
: process,
: how to let the java program responses to -9 signal?
: Thanks,

x*o2009-01-06 08:01

3 楼

any body know this issue?
dose java has signal process like unix system call.
For example, if i run a java program in a jvm and send -9 to the running
process,
how to let the java program responses to -9 signal?

l*02009-01-06 08:01

4 楼

发给program的signal，是在call的时候，还是运行过程中？

【在 x******o 的大作中提到】

: any body know this issue?
: dose java has signal process like unix system call.
: For example, if i run a java program in a jvm and send -9 to the running
: process,
: how to let the java program responses to -9 signal?

x*o2009-01-06 08:01

5 楼

let's say that i have one process running at backend
(it is a java program like start from command line by:
java -cp ... MyJava.class) and suppose this process id is 101.
now, i send the signal from command line (on unix):
kill -9 101
how can i let MyJava.class response to -9 signal?
I think that JVM will take -9 signal at first and there is no ways for
MyJava.class to response -9 signal in this case.
So is there any other way for java program (like MyJava.class) to response
signal?
Thanks

Z*e2009-01-06 08:01

6 楼

"Two signals are unable to be redefined by a signal handler. SIGKILL always
stops a process and SIGSTOP always moves a process from the foreground to
the background. These two signals cannot be "caught" by a signal handler."
so there you go, unix process cannot trap SIGKIL
I think it's prossible to trap other signals by using sun.misc.Signal

【在 x******o 的大作中提到】

: let's say that i have one process running at backend
: (it is a java program like start from command line by:
: java -cp ... MyJava.class) and suppose this process id is 101.
: now, i send the signal from command line (on unix):
: kill -9 101
: how can i let MyJava.class response to -9 signal?
: I think that JVM will take -9 signal at first and there is no ways for
: MyJava.class to response -9 signal in this case.
: So is there any other way for java program (like MyJava.class) to response
: signal?

x*o2009-01-06 08:01

7 楼

Thanks, ZeeGee