initial checkin

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@1481 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/apps/bin/tty.c

@@ -0,0 +1,53 @@
+// ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
+//
+//  Copyright (c) 2001-2003, OpenBeOS
+//
+//  This software is part of the OpenBeOS distribution and is covered 
+//  by the OpenBeOS license.
+//
+//
+//  File:        tty.c
+//  Author:      Daniel Reinhold ([email protected])
+//  Description: prints the file name of the user's terminal
+//
+// ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
+
+#include <OS.h>
+#include <stdio.h>
+#include <unistd.h>
+
+
+void
+usage()
+{
+	printf("Usage: tty [-s]\n"
+	       "Prints the file name for the terminal connected to standard input.\n"
+	       "  -s   silent mode: no output -- only return an exit status\n");
+
+	exit(2);
+}
+
+
+int
+main(int argc, char *argv[])
+{
+	
+	if (argc > 2)
+		usage();
+	
+	else {
+		bool silent = false;
+		
+		if (argc == 2) {
+			if (!strcmp(argv[1], "-s"))
+				silent = true;
+			else
+				usage();
+		}
+		
+		if (!silent)
+			printf("%s\n", ttyname(STDIN_FILENO));
+	}
+	
+	return (isatty(STDIN_FILENO) ? 0 : 1);
+}