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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:38:56 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:38:56 +0000
commit6c20c8ed2cb9ab69a1a57ccb2b9b79969a808321 (patch)
treef63ce19d57fad3ac4a15bc26dbfbfa2b834111b5 /examples/loadables/tty.c
parentInitial commit. (diff)
downloadbash-6c20c8ed2cb9ab69a1a57ccb2b9b79969a808321.tar.xz
bash-6c20c8ed2cb9ab69a1a57ccb2b9b79969a808321.zip
Adding upstream version 5.2.15.upstream/5.2.15upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'examples/loadables/tty.c')
-rw-r--r--examples/loadables/tty.c83
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diff --git a/examples/loadables/tty.c b/examples/loadables/tty.c
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+/* tty - return terminal name */
+
+/* See Makefile for compilation details. */
+
+/*
+ Copyright (C) 1999-2021 Free Software Foundation, Inc.
+
+ This file is part of GNU Bash.
+ Bash is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Bash is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Bash. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "config.h"
+
+#include <stdio.h>
+#include "builtins.h"
+#include "shell.h"
+#include "bashgetopt.h"
+#include "common.h"
+
+extern char *ttyname ();
+
+int
+tty_builtin (list)
+ WORD_LIST *list;
+{
+ int opt, sflag;
+ char *t;
+
+ reset_internal_getopt ();
+ sflag = 0;
+ while ((opt = internal_getopt (list, "s")) != -1)
+ {
+ switch (opt)
+ {
+ case 's':
+ sflag = 1;
+ break;
+ CASE_HELPOPT;
+ default:
+ builtin_usage ();
+ return (EX_USAGE);
+ }
+ }
+ list = loptend;
+
+ t = ttyname (0);
+ QUIT;
+ if (sflag == 0)
+ puts (t ? t : "not a tty");
+ return (t ? EXECUTION_SUCCESS : EXECUTION_FAILURE);
+}
+
+char *tty_doc[] = {
+ "Display terminal name.",
+ "",
+ "tty writes the name of the terminal that is opened for standard",
+ "input to standard output. If the `-s' option is supplied, nothing",
+ "is written; the exit status determines whether or not the standard",
+ "input is connected to a tty.",
+ (char *)NULL
+};
+
+/* The standard structure describing a builtin command. bash keeps an array
+ of these structures. */
+struct builtin tty_struct = {
+ "tty", /* builtin name */
+ tty_builtin, /* function implementing the builtin */
+ BUILTIN_ENABLED, /* initial flags for builtin */
+ tty_doc, /* array of long documentation strings. */
+ "tty [-s]", /* usage synopsis; becomes short_doc */
+ 0 /* reserved for internal use */
+};