386BSD 0.1 development

[unix-history] / usr / src / usr.bin / tty / tty.c

diff --git a/usr/src/usr.bin/tty/tty.c b/usr/src/usr.bin/tty/tty.c
index 0dcc4cb..a85a2e5 100644 (file)
--- a/usr/src/usr.bin/tty/tty.c
+++ b/usr/src/usr.bin/tty/tty.c
@@ -1,19 +1,69 @@
-static char *sccsid = "@(#)tty.c       4.1 (Berkeley) %G%";

 /*
 /*

- * Type tty name
+ * Copyright (c) 1988 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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *     This product includes software developed by the University of
+ *     California, Berkeley and its contributors.
+ * 4. 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.

  */
 
  */
 

-char   *ttyname();
+#ifndef lint
+char copyright[] =
+"@(#) Copyright (c) 1988 Regents of the University of California.\n\
+ All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)tty.c      4.4 (Berkeley) 6/1/90";
+#endif /* not lint */
+
+#include <stdio.h>

 
 main(argc, argv)
 
 main(argc, argv)

-char **argv;
+       int argc;
+       char **argv;

 {
 {

-       register char *p;
+       int ch, sflag;
+       char *t, *ttyname();
+
+       sflag = 0;
+       while ((ch = getopt(argc, argv, "s")) != EOF)
+               switch((char)ch) {
+               case 's':
+                       sflag = 1;
+                       break;
+               case '?':
+               default:
+                       fputs("usage: tty [-s]\n", stderr);
+                       exit(2);
+               }

 
 

-       p = ttyname(0);
-       if(argc==2 && !strcmp(argv[1], "-s"))
-               ;
-       else
-               printf("%s\n", (p? p: "not a tty"));
-       exit(p? 0: 1);
+       t = ttyname(0);
+       if (!sflag)
+               puts(t ? t : "not a tty");
+       exit(t ? 0 : 1);

 }
 }