Imported Upstream version 93u+upstream

1 files changed, 105 insertions, 0 deletions

diff --git a/src/lib/libcmd/tty.c b/src/lib/libcmd/tty.c
new file mode 100644
index 0000000..f5e6aca
--- /dev/null
+++ b/src/lib/libcmd/tty.c
@@ -0,0 +1,105 @@
+/***********************************************************************
+*                                                                      *
+*               This software is part of the ast package               *
+*          Copyright (c) 1992-2012 AT&T Intellectual Property          *
+*                      and is licensed under the                       *
+*                 Eclipse Public License, Version 1.0                  *
+*                    by AT&T Intellectual Property                     *
+*                                                                      *
+*                A copy of the License is available at                 *
+*          http://www.eclipse.org/org/documents/epl-v10.html           *
+*         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
+*                                                                      *
+*              Information and Software Systems Research               *
+*                            AT&T Research                             *
+*                           Florham Park NJ                            *
+*                                                                      *
+*                 Glenn Fowler <gsf@research.att.com>                  *
+*                  David Korn <dgk@research.att.com>                   *
+*                                                                      *
+***********************************************************************/
+#pragma prototyped
+/*
+ * David Korn
+ * AT&T Bell Laboratories
+ *
+ * tty
+ */
+
+static const char usage[] =
+"[-?\n@(#)$Id: tty (AT&T Research) 2008-03-13 $\n]"
+USAGE_LICENSE
+"[+NAME?tty - write the name of the terminal to standard output]"
+"[+DESCRIPTION?\btty\b writes the name of the terminal that is connected "
+	"to standard input onto standard output.  If the standard input is not "
+	"a terminal, \"\bnot a tty\b\" will be written to standard output.]"
+"[l:line-number?Write the synchronous line number of the terminal on a "
+	"separate line following the terminal name line. If the standard "
+	"input is not a synchronous  terminal then "
+	"\"\bnot on an active synchronous line\b\" is written.]"
+"[s:silent|quiet?Disable the terminal name line. Use \b[[ -t 0 ]]]]\b instead.]"
+"[+EXIT STATUS?]{"
+        "[+0?Standard input is a tty.]"
+        "[+1?Standard input is not a tty.]"
+        "[+2?Invalid arguments.]"
+        "[+3?A an error occurred.]"
+"}"
+;
+
+
+#include <cmd.h>
+
+#if _mac_STWLINE
+#include <sys/stermio.h>
+#endif
+
+int
+b_tty(int argc, char** argv, Shbltin_t* context)
+{
+	register int	sflag = 0;
+	register int	lflag = 0;
+	register char*	tty;
+#if _mac_STWLINE
+	int		n;
+#endif
+
+	cmdinit(argc, argv, context, ERROR_CATALOG, 0);
+	for (;;)
+	{
+		switch (optget(argv, usage))
+		{
+		case 'l':
+			lflag++;
+			continue;
+		case 's':
+			sflag++;
+			continue;
+		case ':':
+			error(2, "%s", opt_info.arg);
+			break;
+		case '?':
+			error(ERROR_usage(2), "%s", opt_info.arg);
+			break;
+		}
+		break;
+	}
+	if(error_info.errors)
+		error(ERROR_usage(2), "%s", optusage(NiL));
+	if(!(tty=ttyname(0)))
+	{
+		tty = ERROR_translate(0, 0, 0, "not a tty");
+		error_info.errors++;
+	}
+	if(!sflag)
+		sfputr(sfstdout,tty,'\n');
+	if(lflag)
+	{
+#if _mac_STWLINE
+		if ((n = ioctl(0, STWLINE, 0)) >= 0)
+			error(ERROR_OUTPUT, 1, "synchronous line %d", n);
+		else
+#endif
+			error(ERROR_OUTPUT, 1, "not on an active synchronous line");
+	}
+	return(error_info.errors);
+}