Can I send a signal to a process?

In java, a process is started, then I want sent a ^C signal to this process, but with the javadoc, there are only destroy() can use. How can I do ?
thanks
Message was edited by:
LizhiWang

Don't crosspost.
http://forum.java.sun.com/thread.jspa?threadID=774989

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How I can send a signal to a process

I use a Process.start() to run a extenal program, then I want to send a signal, such as ^C etc to this program.
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I use a Process.start() to run a extenal program,
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The process class is too simple to do this.
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What is the best way of sending signals to processes from a java app ?
Runtime.getRuntime().exec("kill -2 " + pid);Oh, wait, you say: how to get the PID? Now that gets a bit more complicated. You'll have to either exec "ps" and read the output, or resort to some other trickery, like having your child process write its PID to stdout and reading that into the parent.
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I'm trying to send more than one signal to DMA FIFO, but i don't know how to do. When i send one signal i don't have problems. I try to use one block DMA FIFO for one signal. For example if i have 3 signal i use · DMA FIFO but whe i want to wath them in a waveform chart the signals have a delay.
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Regards.
Pablo
Solved!
Go to Solution.
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Not quite. You need to use the Integer To Fixed Point Cast to change from the integers to your FXP numbers. You can then build them into a cluster to write to the Waveform Chart.
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Sending POSIX signal to an external subprocess from a java program

I'm programing in forte for java under linux-mandrake, I've execute an external subprocess with the runtime and Process clases, I need to send the 2� POSIX signal to this external subprocess, I mean de SIGINT signal, I know that you can send a signal from a shell just doing:
Kill -2 pid // the SIGINT signal is the 2 POSIX signal
I know that there is another system-call like : kill(int signal, int pid) that any one can send from a c program.
Althought I don't know how can I get the pid of a suprocess, because I Know that there is the systemcall in c like:
int getpid() wich gives the pid of the current process, but I need to have the pid of a subprocess not the current one.
The thing is that I do not know how can I do it from a java program, I mean that to send a signal to a subprocess it will work using system-calls, but I do not know if I can insert system call in a java program, I've been thinking about doing it using a linux script like:
#!bin/bash
$a = pidof /home/maude-linux/bin/maude.linux
# this is the path of the process wich is running
kill -2 a$
and the run this script from a java program doing an exec(sh script.bin)
but by the moment I must be doing something wrong in the script because I find mistake in it, it gives me mistake in the assign sentence , I mean:
$a = pidof /home/maude-linux/bin/maude.linux
# this is the path of the process wich is running
I'm not used to program shell scripts, perhaps I'm doing something wrong, is there something wrong in this sentence?.
I would aprecciate some help about this, or if somebody have some idea how to do it in java, I repeat I need to send a signal to a external subprocess wich is launched from a java program by the process and runtime clases, and I need to send a SIGINT signal to the subprocess, I hope that some body can give some suggestion or some code explaining the situation

Are the portions of bash-code verbatim in your post?
When yes, they look suspicious!
Instead of
#!bin/bash
#!/bin/bash
would be better.
$a = pidof /home/maude-linux/bin/maude.linux
does not look good either.
If you have command "pidof" telling the pid based on the path name of the executable passed to it as its argument, you can have the output of this program in a shell script like this:
a=$( pidof /home/maude-linux/bin/maude.linux )
Then through $a you will refer to the value of the variable "a":
kill -SIGINT $a
A pidof script could look like this (apart from error handling):
ps -ef|awk '{if (NF>=8 && $8=="'"$1"'") print $2;}'
This works for me; your mileage may vary.

Can I send a signal to a process?

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