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36 lines
1.1 KiB
C
36 lines
1.1 KiB
C
/* Copyright (C) 1991-2014 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <stdio.h>
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#include <string.h>
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/* Return the name of the controlling terminal.
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If S is not NULL, the name is copied into it (it should be at
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least L_ctermid bytes long), otherwise a static buffer is used. */
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char *
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ctermid (s)
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char *s;
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{
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static char name[L_ctermid];
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if (s == NULL)
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s = name;
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return strcpy (s, "/dev/tty");
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}
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