Radix cross Linux

/* begin *

   Следовало бы заменить старый BSD4.3 код на POSIX.
   ================================================

   Например, вызовы sigblock(), sigpause():
   ---------------------------------------

   #define	SIGBLOCK	(sigmask(SIGCHLD)|sigmask(SIGHUP)|sigmask(SIGALRM))


   int
   main(argc, argv, envp)
   	int argc;
   	char *argv[], *envp[];
   {

   . . .

   	for (;;) {
   	    int n, ctrl = -1;
   	    fd_set readable;
 
   	    if (nsock == 0) {
   		(void) sigblock(SIGBLOCK);
   		while (nsock == 0)
   		    sigpause(0L);
   		(void) sigsetmask(0L);
   	    }

   . . .


   пора менять на POSIX вызовы: sigprocmask(), sigsuspend():
   --------------------------------------------------------


   int
   main(argc, argv, envp)
   	int argc;
   	char *argv[], *envp[];
   {

   . . .

   	sigset_t mask, oldmask;

   . . .

   	/* Set up the mask of signals to temporarily block. */
   	sigemptyset(&mask);
   	sigaddset(&mask, SIGCHLD);
   	sigaddset(&mask, SIGHUP);
   	sigaddset(&mask, SIGALRM);

   . . .

   	for (;;) {
   	    int n, ctrl = -1;
   	    fd_set readable;

   	    if (nsock == 0) {
   		(void) sigprocmask(SIG_BLOCK, &mask, &oldmask);
   		while (nsock == 0)
   		    sigsuspend(&oldmask);
   		(void) sigprocmask(SIG_UNBLOCK, &mask, NULL);
   	    }

 * end */