sigchld_handler
ssh_signal(SIGCHLD, sigchld_handler);
ssh_signal(SIGCHLD, sigchld_handler);
sa.sa_handler = sigchld_handler;
void sigchld_handler (int);
sa.sa_handler = sigchld_handler;
void sigchld_handler(int);
static void sigchld_handler(int);
sa.sa_handler = sigchld_handler;
sa.sa_handler = sigchld_handler;
sa.sa_handler = sigchld_handler;
sa.sa_handler = sigchld_handler;
(void) signal(SIGCHLD, sigchld_handler);
sigchld_handler(int),
sa.sa_handler = sigchld_handler;
sa.sa_handler = sigchld_handler;