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 | |
25 | #include "qemu/osdep.h" |
26 | #include "qapi/error.h" |
27 | #include "qemu/module.h" |
28 | #include "qemu/option.h" |
29 | #include "chardev/char.h" |
30 | |
31 | #ifdef _WIN32 |
32 | #include "chardev/char-win.h" |
33 | #else |
34 | #include "chardev/char-fd.h" |
35 | #endif |
36 | |
37 | static void qmp_chardev_open_file(Chardev *chr, |
38 | ChardevBackend *backend, |
39 | bool *be_opened, |
40 | Error **errp) |
41 | { |
42 | ChardevFile *file = backend->u.file.data; |
43 | #ifdef _WIN32 |
44 | HANDLE out; |
45 | DWORD accessmode; |
46 | DWORD flags; |
47 | |
48 | if (file->has_in) { |
49 | error_setg(errp, "input file not supported" ); |
50 | return; |
51 | } |
52 | |
53 | if (file->has_append && file->append) { |
54 | /* Append to file if it already exists. */ |
55 | accessmode = FILE_GENERIC_WRITE & ~FILE_WRITE_DATA; |
56 | flags = OPEN_ALWAYS; |
57 | } else { |
58 | /* Truncate file if it already exists. */ |
59 | accessmode = GENERIC_WRITE; |
60 | flags = CREATE_ALWAYS; |
61 | } |
62 | |
63 | out = CreateFile(file->out, accessmode, FILE_SHARE_READ, NULL, flags, |
64 | FILE_ATTRIBUTE_NORMAL, NULL); |
65 | if (out == INVALID_HANDLE_VALUE) { |
66 | error_setg(errp, "open %s failed" , file->out); |
67 | return; |
68 | } |
69 | |
70 | win_chr_set_file(chr, out, false); |
71 | #else |
72 | int flags, in = -1, out; |
73 | |
74 | flags = O_WRONLY | O_CREAT | O_BINARY; |
75 | if (file->has_append && file->append) { |
76 | flags |= O_APPEND; |
77 | } else { |
78 | flags |= O_TRUNC; |
79 | } |
80 | |
81 | out = qmp_chardev_open_file_source(file->out, flags, errp); |
82 | if (out < 0) { |
83 | return; |
84 | } |
85 | |
86 | if (file->has_in) { |
87 | flags = O_RDONLY; |
88 | in = qmp_chardev_open_file_source(file->in, flags, errp); |
89 | if (in < 0) { |
90 | qemu_close(out); |
91 | return; |
92 | } |
93 | } |
94 | |
95 | qemu_chr_open_fd(chr, in, out); |
96 | #endif |
97 | } |
98 | |
99 | static void qemu_chr_parse_file_out(QemuOpts *opts, ChardevBackend *backend, |
100 | Error **errp) |
101 | { |
102 | const char *path = qemu_opt_get(opts, "path" ); |
103 | ChardevFile *file; |
104 | |
105 | backend->type = CHARDEV_BACKEND_KIND_FILE; |
106 | if (path == NULL) { |
107 | error_setg(errp, "chardev: file: no filename given" ); |
108 | return; |
109 | } |
110 | file = backend->u.file.data = g_new0(ChardevFile, 1); |
111 | qemu_chr_parse_common(opts, qapi_ChardevFile_base(file)); |
112 | file->out = g_strdup(path); |
113 | |
114 | file->has_append = true; |
115 | file->append = qemu_opt_get_bool(opts, "append" , false); |
116 | } |
117 | |
118 | static void char_file_class_init(ObjectClass *oc, void *data) |
119 | { |
120 | ChardevClass *cc = CHARDEV_CLASS(oc); |
121 | |
122 | cc->parse = qemu_chr_parse_file_out; |
123 | cc->open = qmp_chardev_open_file; |
124 | } |
125 | |
126 | static const TypeInfo char_file_type_info = { |
127 | .name = TYPE_CHARDEV_FILE, |
128 | #ifdef _WIN32 |
129 | .parent = TYPE_CHARDEV_WIN, |
130 | #else |
131 | .parent = TYPE_CHARDEV_FD, |
132 | #endif |
133 | .class_init = char_file_class_init, |
134 | }; |
135 | |
136 | static void register_types(void) |
137 | { |
138 | type_register_static(&char_file_type_info); |
139 | } |
140 | |
141 | type_init(register_types); |
142 | |