possible sigchld bug

[Markus Friedl]

signals are not blocked during execution of handlers?

On Mon, Dec 22, 2003 at 08:26:28PM +0100, Mikulas Patocka wrote:
> Hi
> 
> What if you have sysv signals (i.e. signal is restored when handler is
> called) and child process exits here? Zombie will be left, because SIGCHLD
> is ignored at that point. Shouldn't signal be before waitpid?
> 
> Mikulas
> 
> static void
> main_sigchld_handler(int sig)
> {
>         int save_errno = errno;
>         pid_t pid;
>         int status;
> 
>         while ((pid = waitpid(-1, &status, WNOHANG)) > 0 ||
>             (pid < 0 && errno == EINTR))
>                 ;
> 
> 		<----- HERE
> 
>         signal(SIGCHLD, main_sigchld_handler);
>         errno = save_errno;
> }
> 
> _______________________________________________
> openssh-unix-dev mailing list
> openssh-unix-dev at mindrot.org
> http://www.mindrot.org/mailman/listinfo/openssh-unix-dev