1de7b4b805
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. No functional change intended.
176 lines
3.8 KiB
C
176 lines
3.8 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2011 NetApp, Inc.
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* 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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*
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* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``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 NETAPP, INC 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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* $FreeBSD$
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#ifndef WITHOUT_CAPSICUM
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#include <sys/capsicum.h>
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#endif
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#include <sys/select.h>
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#include <err.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <termios.h>
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#include <unistd.h>
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#include <stdbool.h>
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#include <sysexits.h>
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#include "inout.h"
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#include "pci_lpc.h"
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#define BVM_CONSOLE_PORT 0x220
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#define BVM_CONS_SIG ('b' << 8 | 'v')
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static struct termios tio_orig, tio_new;
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static void
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ttyclose(void)
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{
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tcsetattr(STDIN_FILENO, TCSANOW, &tio_orig);
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}
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static void
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ttyopen(void)
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{
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tcgetattr(STDIN_FILENO, &tio_orig);
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cfmakeraw(&tio_new);
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tcsetattr(STDIN_FILENO, TCSANOW, &tio_new);
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atexit(ttyclose);
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}
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static bool
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tty_char_available(void)
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{
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fd_set rfds;
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struct timeval tv;
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FD_ZERO(&rfds);
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FD_SET(STDIN_FILENO, &rfds);
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tv.tv_sec = 0;
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tv.tv_usec = 0;
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if (select(STDIN_FILENO + 1, &rfds, NULL, NULL, &tv) > 0) {
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return (true);
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} else {
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return (false);
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}
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}
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static int
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ttyread(void)
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{
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char rb;
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if (tty_char_available()) {
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read(STDIN_FILENO, &rb, 1);
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return (rb & 0xff);
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} else {
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return (-1);
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}
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}
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static void
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ttywrite(unsigned char wb)
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{
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(void) write(STDOUT_FILENO, &wb, 1);
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}
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static int
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console_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes,
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uint32_t *eax, void *arg)
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{
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static int opened;
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#ifndef WITHOUT_CAPSICUM
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cap_rights_t rights;
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cap_ioctl_t cmds[] = { TIOCGETA, TIOCSETA, TIOCGWINSZ };
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#endif
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if (bytes == 2 && in) {
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*eax = BVM_CONS_SIG;
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return (0);
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}
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/*
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* Guests might probe this port to look for old ISA devices
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* using single-byte reads. Return 0xff for those.
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*/
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if (bytes == 1 && in) {
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*eax = 0xff;
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return (0);
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}
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if (bytes != 4)
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return (-1);
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if (!opened) {
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#ifndef WITHOUT_CAPSICUM
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cap_rights_init(&rights, CAP_EVENT, CAP_IOCTL, CAP_READ,
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CAP_WRITE);
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if (cap_rights_limit(STDIN_FILENO, &rights) == -1 &&
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errno != ENOSYS)
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errx(EX_OSERR, "Unable to apply rights for sandbox");
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if (cap_ioctls_limit(STDIN_FILENO, cmds, nitems(cmds)) == -1 &&
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errno != ENOSYS)
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errx(EX_OSERR, "Unable to apply rights for sandbox");
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#endif
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ttyopen();
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opened = 1;
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}
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if (in)
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*eax = ttyread();
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else
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ttywrite(*eax);
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return (0);
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}
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SYSRES_IO(BVM_CONSOLE_PORT, 4);
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static struct inout_port consport = {
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"bvmcons",
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BVM_CONSOLE_PORT,
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1,
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IOPORT_F_INOUT,
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console_handler
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};
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void
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init_bvmcons(void)
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{
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register_inout(&consport);
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}
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