Hi,
I have a server process that creates a child process. The server process receives SIGUSR1 from the child process. The child exec an executable that has either setitimer() or alarm() (I tried both) and a signal handler that sends SIGUSR1 to the server.
If the parent doesn't receive SIGUSR1, it assumes the child doesn't respond so it kills it (SIGKILL) and forks/exec a new child.
First invocation works well but for some reason, after a new child is created, it does not send signals anymore (I straced it, It seems not to enter the sigalarm handler I created) but it does work fine from the shell (had to trap USR1 first and run in background). I hope you can tell me why.
I am on Gentoo with Kernel 2.4.26-gentoo-r9
Here is the child code.
#include <errno.h>
#include <unistd.h>
#include <signal.h>
#include <stdlib.h>
void sigalrmHandler(int gotsig)
{
kill(getppid(), SIGUSR1);
alarm(2);
}int main(int argc, char ** argv)
{
alarm(2);
signal(SIGALRM, sigalrmHandler);
while(1)
pause();
exit(0);
}-- Thanks.
David Harel,
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