mirror of https://gitee.com/openkylin/qemu.git
141 lines
3.9 KiB
C
141 lines
3.9 KiB
C
/*
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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 "qapi/error.h"
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#include "qemu/option.h"
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#include "chardev/char.h"
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#ifdef _WIN32
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#include "chardev/char-win.h"
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#else
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#include "chardev/char-fd.h"
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#endif
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static void qmp_chardev_open_file(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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ChardevFile *file = backend->u.file.data;
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#ifdef _WIN32
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HANDLE out;
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DWORD accessmode;
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DWORD flags;
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if (file->has_in) {
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error_setg(errp, "input file not supported");
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return;
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}
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if (file->has_append && file->append) {
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/* Append to file if it already exists. */
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accessmode = FILE_GENERIC_WRITE & ~FILE_WRITE_DATA;
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flags = OPEN_ALWAYS;
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} else {
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/* Truncate file if it already exists. */
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accessmode = GENERIC_WRITE;
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flags = CREATE_ALWAYS;
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}
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out = CreateFile(file->out, accessmode, FILE_SHARE_READ, NULL, flags,
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FILE_ATTRIBUTE_NORMAL, NULL);
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if (out == INVALID_HANDLE_VALUE) {
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error_setg(errp, "open %s failed", file->out);
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return;
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}
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win_chr_set_file(chr, out, false);
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#else
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int flags, in = -1, out;
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flags = O_WRONLY | O_CREAT | O_BINARY;
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if (file->has_append && file->append) {
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flags |= O_APPEND;
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} else {
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flags |= O_TRUNC;
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}
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out = qmp_chardev_open_file_source(file->out, flags, errp);
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if (out < 0) {
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return;
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}
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if (file->has_in) {
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flags = O_RDONLY;
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in = qmp_chardev_open_file_source(file->in, flags, errp);
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if (in < 0) {
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qemu_close(out);
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return;
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}
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}
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qemu_chr_open_fd(chr, in, out);
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#endif
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}
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static void qemu_chr_parse_file_out(QemuOpts *opts, ChardevBackend *backend,
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Error **errp)
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{
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const char *path = qemu_opt_get(opts, "path");
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ChardevFile *file;
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backend->type = CHARDEV_BACKEND_KIND_FILE;
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if (path == NULL) {
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error_setg(errp, "chardev: file: no filename given");
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return;
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}
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file = backend->u.file.data = g_new0(ChardevFile, 1);
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qemu_chr_parse_common(opts, qapi_ChardevFile_base(file));
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file->out = g_strdup(path);
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file->has_append = true;
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file->append = qemu_opt_get_bool(opts, "append", false);
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}
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static void char_file_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_file_out;
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cc->open = qmp_chardev_open_file;
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}
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static const TypeInfo char_file_type_info = {
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.name = TYPE_CHARDEV_FILE,
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#ifdef _WIN32
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.parent = TYPE_CHARDEV_WIN,
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#else
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.parent = TYPE_CHARDEV_FD,
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#endif
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.class_init = char_file_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_file_type_info);
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}
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type_init(register_types);
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