11-17-2005
Handling SIGUSR2 signal
HI,
I need to handle SIGUSR2 signal in my application to change the state of the application dynamically. I have implemented the signal handler. However the application is able to catch only one SIGUSR2 signal. The second SIGUSR2 signal causes the application to crash. This is happning only with SIGUSR2. Other signals, e.g. SIGCHLD, SIGIOT, are working fine. Can anyone tell me what is wrong with the SIGUSR2 signal?
Regards,
Diganta
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vsig(1F) FMLI Commands vsig(1F)
NAME
vsig - synchronize a co-process with the controlling FMLI application
SYNOPSIS
vsig
DESCRIPTION
The vsig executable sends a SIGUSR2 signal to the controlling FMLI process. This signal/alarm causes FMLI to execute the FMLI built-in
command checkworld which causes all posted objects with a reread descriptor evaluating to TRUE to be reread. vsig takes no arguments.
EXAMPLES
Example 1: A sample output of vsig command.
The following is a segment of a shell program:
echo "Sending this string to an FMLI process"
vsig
The vsig executable will flush the output buffer before it sends the SIGUSR2 signal to make sure the string is actually in the pipe created
by the cocreate function.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWesu |
+-----------------------------+-----------------------------+
SEE ALSO
coproc(1F), kill(1), kill(2), signal(3C), attributes(5)
NOTES
Because vsig synchronize with FMLI, it should be used rather than kill to send a SIGUSR2 signal to FMLI.
SunOS 5.10 5 Jul 1990 vsig(1F)