* Signal and wait question
@ 2002-05-21 15:20 Bubulac Tatiana
0 siblings, 0 replies; only message in thread
From: Bubulac Tatiana @ 2002-05-21 15:20 UTC (permalink / raw)
To: linux-c-programming, redhat-list
Hi ,
I have a parent that catch the SIGTERM and SIGALRM signals.
...
signal (SIGTERM, die);
signal (SIGALRM, dummy);
...
for (min = 0; min < 15 && not_done; min++)
{
alarm ((unsigned int) 60); /* wait for 1 minute */
pid = wait (&status); /* Wait for a process to end */
alarm ((unsigned int) 0); /* Reset alarm */
....
}
and a child that use the same signal catch function.
...
signal (SIGTERM, die);
...
Here is the die fucntion.
#include......
void die();
void die ()
{
signal (SIGTERM, (void (*)())die);
printf("child receives SIGTERM signal\n");
return;
}
void s_down();
void s_down ()
{
extern BOOLEAN l_down;
signal (SIGALRM, (void (*)())s_down);
l_down = TRUE;
printf("child receive SIGALRM signal\n");
return;
}
When I send a sigterm signal only the parent display
"parent receives SIGTERM signal" and stack here.
If I give a kill -9 child pid the parent displays "Normal
Termination"and than Killed.
Why the parent stack in wait() and child do not receive any signal?
TIA.
Bubulac Tatiana.
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