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36 lines
1.2 KiB
C
36 lines
1.2 KiB
C
/* Copyright (C) 1991-2020 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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<https://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. If S is not NULL, the
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name is copied into it (it should be at least L_ctermid bytes
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long), otherwise we return a pointer to a non-const but read-only
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string literal, that POSIX states the caller must not modify. */
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char *
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ctermid (char *s)
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{
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char *name = (char /*drop const*/ *) "/dev/tty";
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if (s == NULL)
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return name;
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return strcpy (s, name);
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}
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