73 lines
2.4 KiB
C
73 lines
2.4 KiB
C
/*
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* Copyright (c) 1988, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)ttyslot.c 8.1 (Berkeley) 6/4/93";
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#endif /* LIBC_SCCS and not lint */
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#include <ttyent.h>
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#include <alloca.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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int
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ttyslot (void)
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{
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struct ttyent *ttyp;
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int slot;
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char *p;
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int cnt;
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size_t buflen = __sysconf (_SC_TTY_NAME_MAX) + 1;
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char *name;
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if (buflen == 0)
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/* This should be enough if no fixed value is given. */
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buflen = 32;
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name = __alloca (buflen);
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__setttyent();
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for (cnt = 0; cnt < 3; ++cnt)
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if (__ttyname_r (cnt, name, buflen) == 0) {
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if ((p = strrchr (name, '/')))
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++p;
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else
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p = name;
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for (slot = 1; (ttyp = __getttyent()); ++slot)
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if (!strcmp(ttyp->ty_name, p)) {
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__endttyent();
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return(slot);
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}
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break;
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}
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__endttyent();
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return(0);
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}
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