/* * 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); if (!g_unix_set_fd_nonblocking(0, true, NULL)) { error_setg_errno(errp, errno, "Failed to set FD nonblocking"); return; } 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); stdio_allow_signal = !opts->has_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);