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