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Apply the following automated changes to try to eliminate no-longer-needed sys/cdefs.h includes as well as now-empty blank lines in a row. Remove /^#if.*\n#endif.*\n#include\s+<sys/cdefs.h>.*\n/ Remove /\n+#include\s+<sys/cdefs.h>.*\n+#if.*\n#endif.*\n+/ Remove /\n+#if.*\n#endif.*\n+/ Remove /^#if.*\n#endif.*\n/ Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/types.h>/ Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/param.h>/ Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/capsicum.h>/ Sponsored by: Netflix
115 lines
3.2 KiB
C
115 lines
3.2 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2008 Ed Schouten <ed@FreeBSD.org>
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* All rights reserved.
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*
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* Portions of this software were developed under sponsorship from Snow
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* B.V., the Netherlands.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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#include "namespace.h"
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#include <sys/param.h>
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#include <sys/ioctl.h>
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#include <errno.h>
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#include <paths.h>
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#include <stdlib.h>
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#include <string.h>
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#include "un-namespace.h"
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/*
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* __isptmaster(): return whether the file descriptor refers to a
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* pseudo-terminal master device.
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*/
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static int
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__isptmaster(int fildes)
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{
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if (_ioctl(fildes, TIOCPTMASTER) == 0)
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return (0);
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if (errno != EBADF)
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errno = EINVAL;
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return (-1);
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}
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/*
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* In our implementation, grantpt() and unlockpt() don't actually have
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* any use, because PTY's are created on the fly and already have proper
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* permissions upon creation.
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*
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* Just make sure `fildes' actually points to a real PTY master device.
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*/
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__strong_reference(__isptmaster, grantpt);
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__strong_reference(__isptmaster, unlockpt);
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/*
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* ptsname_r(): return the pathname of the slave pseudo-terminal device
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* associated with the specified master.
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*/
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int
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__ptsname_r(int fildes, char *buffer, size_t buflen)
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{
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if (buflen <= sizeof(_PATH_DEV)) {
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errno = ERANGE;
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return (-1);
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}
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/* Make sure fildes points to a master device. */
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if (__isptmaster(fildes) != 0)
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return (-1);
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memcpy(buffer, _PATH_DEV, sizeof(_PATH_DEV));
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buffer += sizeof(_PATH_DEV) - 1;
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buflen -= sizeof(_PATH_DEV) - 1;
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if (fdevname_r(fildes, buffer, buflen) == NULL) {
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if (errno == EINVAL)
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errno = ERANGE;
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return (-1);
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}
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return (0);
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}
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__strong_reference(__ptsname_r, ptsname_r);
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/*
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* ptsname(): return the pathname of the slave pseudo-terminal device
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* associated with the specified master.
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*/
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char *
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ptsname(int fildes)
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{
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static char pt_slave[sizeof(_PATH_DEV) + SPECNAMELEN];
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if (__ptsname_r(fildes, pt_slave, sizeof(pt_slave)) == 0)
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return (pt_slave);
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return (NULL);
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}
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