Browse Source
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Acked-by: Eric Blake <eblake@redhat.com>pull/47/merge
Marc-André Lureau
9 years ago
3 changed files with 165 additions and 120 deletions
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/*
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* QEMU System Emulator |
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* |
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* Copyright (c) 2003-2008 Fabrice Bellard |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a copy |
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* of this software and associated documentation files (the "Software"), to deal |
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* in the Software without restriction, including without limitation the rights |
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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* copies of the Software, and to permit persons to whom the Software is |
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* furnished to do so, subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be included in |
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* all copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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* THE SOFTWARE. |
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*/ |
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#include "qemu/osdep.h" |
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#include "qemu/sockets.h" |
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#include "qapi/error.h" |
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#include "qemu-common.h" |
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#include "sysemu/char.h" |
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#ifdef _WIN32 |
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#include "char-win.h" |
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#include "char-win-stdio.h" |
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#else |
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#include <termios.h> |
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#include "char-fd.h" |
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#endif |
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#ifndef _WIN32 |
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/* init terminal so that we can grab keys */ |
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static struct termios oldtty; |
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static int old_fd0_flags; |
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static bool stdio_in_use; |
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static bool stdio_allow_signal; |
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static bool stdio_echo_state; |
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static void term_exit(void) |
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{ |
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tcsetattr(0, TCSANOW, &oldtty); |
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fcntl(0, F_SETFL, old_fd0_flags); |
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} |
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static void qemu_chr_set_echo_stdio(Chardev *chr, bool echo) |
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{ |
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struct termios tty; |
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stdio_echo_state = echo; |
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tty = oldtty; |
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if (!echo) { |
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tty.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP |
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| INLCR | IGNCR | ICRNL | IXON); |
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tty.c_oflag |= OPOST; |
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tty.c_lflag &= ~(ECHO | ECHONL | ICANON | IEXTEN); |
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tty.c_cflag &= ~(CSIZE | PARENB); |
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tty.c_cflag |= CS8; |
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tty.c_cc[VMIN] = 1; |
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tty.c_cc[VTIME] = 0; |
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} |
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if (!stdio_allow_signal) { |
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tty.c_lflag &= ~ISIG; |
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} |
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tcsetattr(0, TCSANOW, &tty); |
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} |
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static void term_stdio_handler(int sig) |
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{ |
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/* restore echo after resume from suspend. */ |
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qemu_chr_set_echo_stdio(NULL, stdio_echo_state); |
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} |
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static void qemu_chr_open_stdio(Chardev *chr, |
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ChardevBackend *backend, |
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bool *be_opened, |
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Error **errp) |
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{ |
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ChardevStdio *opts = backend->u.stdio.data; |
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struct sigaction act; |
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if (is_daemonized()) { |
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error_setg(errp, "cannot use stdio with -daemonize"); |
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return; |
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} |
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if (stdio_in_use) { |
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error_setg(errp, "cannot use stdio by multiple character devices"); |
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return; |
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} |
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stdio_in_use = true; |
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old_fd0_flags = fcntl(0, F_GETFL); |
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tcgetattr(0, &oldtty); |
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qemu_set_nonblock(0); |
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atexit(term_exit); |
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memset(&act, 0, sizeof(act)); |
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act.sa_handler = term_stdio_handler; |
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sigaction(SIGCONT, &act, NULL); |
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qemu_chr_open_fd(chr, 0, 1); |
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if (opts->has_signal) { |
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stdio_allow_signal = opts->signal; |
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} |
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qemu_chr_set_echo_stdio(chr, false); |
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} |
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#endif |
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static void qemu_chr_parse_stdio(QemuOpts *opts, ChardevBackend *backend, |
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Error **errp) |
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{ |
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ChardevStdio *stdio; |
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backend->type = CHARDEV_BACKEND_KIND_STDIO; |
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stdio = backend->u.stdio.data = g_new0(ChardevStdio, 1); |
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qemu_chr_parse_common(opts, qapi_ChardevStdio_base(stdio)); |
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stdio->has_signal = true; |
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stdio->signal = qemu_opt_get_bool(opts, "signal", true); |
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} |
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static void char_stdio_class_init(ObjectClass *oc, void *data) |
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{ |
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ChardevClass *cc = CHARDEV_CLASS(oc); |
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cc->parse = qemu_chr_parse_stdio; |
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#ifndef _WIN32 |
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cc->open = qemu_chr_open_stdio; |
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cc->chr_set_echo = qemu_chr_set_echo_stdio; |
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#endif |
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} |
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static void char_stdio_finalize(Object *obj) |
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{ |
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#ifndef _WIN32 |
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term_exit(); |
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#endif |
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} |
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static const TypeInfo char_stdio_type_info = { |
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.name = TYPE_CHARDEV_STDIO, |
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#ifdef _WIN32 |
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.parent = TYPE_CHARDEV_WIN_STDIO, |
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#else |
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.parent = TYPE_CHARDEV_FD, |
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#endif |
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.instance_finalize = char_stdio_finalize, |
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.class_init = char_stdio_class_init, |
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}; |
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static void register_types(void) |
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{ |
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type_register_static(&char_stdio_type_info); |
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} |
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type_init(register_types); |
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