qapi2texi: Fix up output around #optional
[qemu.git] / chardev / char-file.c
1 /*
2 * QEMU System Emulator
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24 #include "qemu/osdep.h"
25 #include "qapi/error.h"
26 #include "qemu-common.h"
27 #include "sysemu/char.h"
28
29 #ifdef _WIN32
30 #include "char-win.h"
31 #else
32 #include "char-fd.h"
33 #endif
34
35 static void qmp_chardev_open_file(Chardev *chr,
36 ChardevBackend *backend,
37 bool *be_opened,
38 Error **errp)
39 {
40 ChardevFile *file = backend->u.file.data;
41 #ifdef _WIN32
42 HANDLE out;
43 DWORD accessmode;
44 DWORD flags;
45
46 if (file->has_in) {
47 error_setg(errp, "input file not supported");
48 return;
49 }
50
51 if (file->has_append && file->append) {
52 /* Append to file if it already exists. */
53 accessmode = FILE_GENERIC_WRITE & ~FILE_WRITE_DATA;
54 flags = OPEN_ALWAYS;
55 } else {
56 /* Truncate file if it already exists. */
57 accessmode = GENERIC_WRITE;
58 flags = CREATE_ALWAYS;
59 }
60
61 out = CreateFile(file->out, accessmode, FILE_SHARE_READ, NULL, flags,
62 FILE_ATTRIBUTE_NORMAL, NULL);
63 if (out == INVALID_HANDLE_VALUE) {
64 error_setg(errp, "open %s failed", file->out);
65 return;
66 }
67
68 qemu_chr_open_win_file(chr, out);
69 #else
70 int flags, in = -1, out;
71
72 flags = O_WRONLY | O_CREAT | O_BINARY;
73 if (file->has_append && file->append) {
74 flags |= O_APPEND;
75 } else {
76 flags |= O_TRUNC;
77 }
78
79 out = qmp_chardev_open_file_source(file->out, flags, errp);
80 if (out < 0) {
81 return;
82 }
83
84 if (file->has_in) {
85 flags = O_RDONLY;
86 in = qmp_chardev_open_file_source(file->in, flags, errp);
87 if (in < 0) {
88 qemu_close(out);
89 return;
90 }
91 }
92
93 qemu_chr_open_fd(chr, in, out);
94 #endif
95 }
96
97 static void qemu_chr_parse_file_out(QemuOpts *opts, ChardevBackend *backend,
98 Error **errp)
99 {
100 const char *path = qemu_opt_get(opts, "path");
101 ChardevFile *file;
102
103 backend->type = CHARDEV_BACKEND_KIND_FILE;
104 if (path == NULL) {
105 error_setg(errp, "chardev: file: no filename given");
106 return;
107 }
108 file = backend->u.file.data = g_new0(ChardevFile, 1);
109 qemu_chr_parse_common(opts, qapi_ChardevFile_base(file));
110 file->out = g_strdup(path);
111
112 file->has_append = true;
113 file->append = qemu_opt_get_bool(opts, "append", false);
114 }
115
116 static void char_file_class_init(ObjectClass *oc, void *data)
117 {
118 ChardevClass *cc = CHARDEV_CLASS(oc);
119
120 cc->parse = qemu_chr_parse_file_out;
121 cc->open = qmp_chardev_open_file;
122 }
123
124 static const TypeInfo char_file_type_info = {
125 .name = TYPE_CHARDEV_FILE,
126 #ifdef _WIN32
127 .parent = TYPE_CHARDEV_WIN,
128 #else
129 .parent = TYPE_CHARDEV_FD,
130 #endif
131 .class_init = char_file_class_init,
132 };
133
134 static void register_types(void)
135 {
136 type_register_static(&char_file_type_info);
137 }
138
139 type_init(register_types);