Very Computer

1. Signal handlers are not reset after signal delivery

The man page for signal says

        Unlike on BSD systems, signals under Linux  are  reset  to
        their  default behavior  when  raised.  However, if you
        include <bsd/signal.h> instead of <signal.h> then signal is
        redefined as __bsd_signal and signal has the BSD
semantics.

However I tried the following simple program and found that if I install
a signal handler once, it remains installed over multiple deliveries of
the same signal. i.e. the signal does not get  reset to its default
behaviour when raised.

#include <stdio.h>
#include <signal.h>

void  handler( int x) {

        printf( "Got the signal\n");

main() {

        char c;
        signal(28, handler);

        sleep(3600);

        printf( "Woke up\n");
        sleep(3600);

and the I did 'kill -28 <pid>' twice. Both the times I got the
message from signal handler.

Can anyone help explain this contradiction or am I messing up
somewhere in the concepts?

Thanks,
-Kartik

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