RS232 programming (sigaction problem)

lucky6969b · 11-30-2005, 08:45 PM

Hi there,
I've got an application on hand. This app involves a structure called sigaction
But when I set this variable in C++ mode, I've got the following error

unittest.cpp: In function 'int main(int, char**)':
unittest.cpp:73: error: no match for 'operator=' in 'saio.sigaction::sa_mask = 0'
/usr/include/bits/sigset.h:31: note: candidates are: __sigset_t& __sigset_t:

perator=(const __sigset_t&)

Code snippnet
.....
saig.sa_mask = 0;
....
etc

Thanks
Jack

lucky6969b · 11-30-2005, 09:08 PM

Sorry, this is a network program. But I just dropped it in the wrong place
Thanks
Jack

Koteck · 04-05-2008, 02:06 PM

I've got this error when compiling the following example code:

void signal_handler_IO(int status)
{
...
}
...
void main()
{
struct sigaction saio;
...
saio.sa_handler = signal_handler_IO;
saio.sa_mask = 0; // problematic instruction
saio.flags = 0;
...
}

the solution is to replace:
saio.sa_mask = 0;
by:
sigemptyset(&(saio.sa_mask));

it seems to be a low-level implementation problem of the struct sigaction which internally manages 'unions' and differs from one platform to another