usr/src/usr.bin/tip/hunt.c

#ifndef lint
static char sccsid[] = "@(#)hunt.c	4.8 (Berkeley) %G%";
#endif

#include "tip.h"

extern char *getremote();
extern char *rindex();

static	jmp_buf deadline;
static	int deadfl;

dead()
{

	deadfl = 1;
	longjmp(deadline, 1);
}

hunt(name)
	char *name;
{
	register char *cp;
	int (*f)();

	f = signal(SIGALRM, dead);
	deadfl = 0;
	while (cp = getremote(name)) {
		uucplock = rindex(cp, '/')+1;
		if (mlock(uucplock) < 0) {
			delock(uucplock);
			continue;
		}
		/*
		 * Straight through call units, such as the BIZCOMP,
		 * VADIC and the DF, must indicate they're hardwired in
		 *  order to get an open file descriptor placed in FD.
		 * Otherwise, as for a DN-11, the open will have to
		 *  be done in the "open" routine.
		 */
		if (!HW)
			break;
		if (setjmp(deadline) == 0) {
			alarm(10);
			FD = open(cp, O_RDWR);
		}
		alarm(0);
		if (FD < 0) {
			perror(cp);
			deadfl = 1;
		}
		if (!deadfl) {
			ioctl(FD, TIOCEXCL, 0);
			ioctl(FD, TIOCHPCL, 0);
			signal(SIGALRM, SIG_DFL);
			return ((int)cp);
		}
		delock(uucplock);
	}
	signal(SIGALRM, f);
	return (deadfl ? -1 : (int)cp);
}
Commit	Line	Data
	1	#ifndef lint
	2	static char sccsid[] = "@(#)hunt.c 4.8 (Berkeley) %G%";
	3	#endif
	4
	5	#include "tip.h"
	6
	7	extern char *getremote();
	8	extern char *rindex();
	9
	10	static jmp_buf deadline;
	11	static int deadfl;
	12
	13	dead()
	14	{
	15
	16	deadfl = 1;
	17	longjmp(deadline, 1);
	18	}
	19
	20	hunt(name)
	21	char *name;
	22	{
	23	register char *cp;
	24	int (*f)();
	25
	26	f = signal(SIGALRM, dead);
	27	deadfl = 0;
	28	while (cp = getremote(name)) {
	29	uucplock = rindex(cp, '/')+1;
	30	if (mlock(uucplock) < 0) {
	31	delock(uucplock);
	32	continue;
	33	}
	34	/*
	35	* Straight through call units, such as the BIZCOMP,
	36	* VADIC and the DF, must indicate they're hardwired in
	37	* order to get an open file descriptor placed in FD.
	38	* Otherwise, as for a DN-11, the open will have to
	39	* be done in the "open" routine.
	40	*/
	41	if (!HW)
	42	break;
	43	if (setjmp(deadline) == 0) {
	44	alarm(10);
	45	FD = open(cp, O_RDWR);
	46	}
	47	alarm(0);
	48	if (FD < 0) {
	49	perror(cp);
	50	deadfl = 1;
	51	}
	52	if (!deadfl) {
	53	ioctl(FD, TIOCEXCL, 0);
	54	ioctl(FD, TIOCHPCL, 0);
	55	signal(SIGALRM, SIG_DFL);
	56	return ((int)cp);
	57	}
	58	delock(uucplock);
	59	}
	60	signal(SIGALRM, f);
	61	return (deadfl ? -1 : (int)cp);
	62	}