BSD 4_3_Net_2 release

[unix-history] / usr / src / lib / libc / gen / isatty.c

diff --git a/usr/src/lib/libc/gen/isatty.c b/usr/src/lib/libc/gen/isatty.c
index fab1fd9..e1fddcf 100644 (file)
--- a/usr/src/lib/libc/gen/isatty.c
+++ b/usr/src/lib/libc/gen/isatty.c
@@ -1,18 +1,48 @@
-#if defined(LIBC_SCCS) && !defined(lint)
-static char sccsid[] = "@(#)isatty.c   5.2 (Berkeley) %G%";
-#endif LIBC_SCCS and not lint
-

 /*
 /*

- * Returns 1 iff file is a tty
+ * Copyright (c) 1988 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. 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.

  */
 
  */
 

-#include <sgtty.h>
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)isatty.c   5.6 (Berkeley) 2/23/91";
+#endif /* LIBC_SCCS and not lint */
+
+#include <termios.h>
+#include <unistd.h>

 
 

-isatty(f)
+int
+isatty(fd)
+       int fd;

 {
 {

-       struct sgttyb ttyb;
+       struct termios t;

 
 

-       if (ioctl(f, TIOCGETP, &ttyb) < 0)
-               return(0);
-       return(1);
+       return(tcgetattr(fd, &t) != -1);

 }
 }