1 files changed, 101 insertions, 0 deletions
diff --git a/usr.bin/tip/tip/hunt.c b/usr.bin/tip/tip/hunt.c
new file mode 100644
index 000000000000..f4795091cb88
--- /dev/null
+++ b/usr.bin/tip/tip/hunt.c
@@ -0,0 +1,101 @@
+/*	$OpenBSD: hunt.c,v 1.13 2006/03/17 19:39:46 deraadt Exp $	*/
+/*	$NetBSD: hunt.c,v 1.6 1997/04/20 00:02:10 mellon Exp $	*/
+
+/*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright (c) 1983, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include "tip.h"
+
+static	jmp_buf deadline;
+static	int deadfl;
+
+static void	dead(int);
+
+/*ARGSUSED*/
+static void
+dead(int signo)
+{
+	deadfl = 1;
+	longjmp(deadline, 1);
+}
+
+long
+hunt(char *name)
+{
+	char *cp;
+	sig_t f;
+
+	f = signal(SIGALRM, dead);
+	while ((cp = getremote(name))) {
+		deadfl = 0;
+		uucplock = strrchr(cp, '/');
+		if (uucplock == NULL)
+			uucplock = cp;
+		else
+			uucplock++;
+
+		if (uu_lock(uucplock) < 0)
+			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 |
+			    (boolean(value(DC)) ? O_NONBLOCK : 0)));
+		}
+		alarm(0);
+		if (FD < 0) {
+			perror(cp);
+			deadfl = 1;
+		}
+		if (!deadfl) {
+			struct termios cntrl;
+
+			tcgetattr(FD, &cntrl);
+			if (!boolean(value(DC)))
+				cntrl.c_cflag |= HUPCL;
+			tcsetattr(FD, TCSAFLUSH, &cntrl);
+			ioctl(FD, TIOCEXCL, 0);
+			signal(SIGALRM, SIG_DFL);
+			return ((long)cp);
+		}
+		(void)uu_unlock(uucplock);
+	}
+	signal(SIGALRM, f);
+	return (deadfl ? -1 : (long)cp);
+}