arm tcg cpus: Fix Lesser GPL version number
[qemu.git] / chardev / char-pipe.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
25 #include "qemu/osdep.h"
26 #include "qemu-common.h"
27 #include "qapi/error.h"
28 #include "qemu/main-loop.h"
29 #include "qemu/module.h"
30 #include "qemu/option.h"
31 #include "chardev/char.h"
32
33 #ifdef _WIN32
34 #include "chardev/char-win.h"
35 #else
36 #include "chardev/char-fd.h"
37 #endif
38
39 #ifdef _WIN32
40 #define MAXCONNECT 1
41 #define NTIMEOUT 5000
42
43 static int win_chr_pipe_init(Chardev *chr, const char *filename,
44 Error **errp)
45 {
46 WinChardev *s = WIN_CHARDEV(chr);
47 OVERLAPPED ov;
48 int ret;
49 DWORD size;
50 char *openname;
51
52 s->fpipe = TRUE;
53
54 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
55 if (!s->hsend) {
56 error_setg(errp, "Failed CreateEvent");
57 goto fail;
58 }
59 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
60 if (!s->hrecv) {
61 error_setg(errp, "Failed CreateEvent");
62 goto fail;
63 }
64
65 openname = g_strdup_printf("\\\\.\\pipe\\%s", filename);
66 s->file = CreateNamedPipe(openname,
67 PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
68 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
69 PIPE_WAIT,
70 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
71 g_free(openname);
72 if (s->file == INVALID_HANDLE_VALUE) {
73 error_setg_win32(errp, GetLastError(), "Failed CreateNamedPipe");
74 s->file = NULL;
75 goto fail;
76 }
77
78 ZeroMemory(&ov, sizeof(ov));
79 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
80 ret = ConnectNamedPipe(s->file, &ov);
81 if (ret) {
82 error_setg(errp, "Failed ConnectNamedPipe");
83 goto fail;
84 }
85
86 ret = GetOverlappedResult(s->file, &ov, &size, TRUE);
87 if (!ret) {
88 error_setg(errp, "Failed GetOverlappedResult");
89 if (ov.hEvent) {
90 CloseHandle(ov.hEvent);
91 ov.hEvent = NULL;
92 }
93 goto fail;
94 }
95
96 if (ov.hEvent) {
97 CloseHandle(ov.hEvent);
98 ov.hEvent = NULL;
99 }
100 qemu_add_polling_cb(win_chr_pipe_poll, chr);
101 return 0;
102
103 fail:
104 return -1;
105 }
106
107 static void qemu_chr_open_pipe(Chardev *chr,
108 ChardevBackend *backend,
109 bool *be_opened,
110 Error **errp)
111 {
112 ChardevHostdev *opts = backend->u.pipe.data;
113 const char *filename = opts->device;
114
115 if (win_chr_pipe_init(chr, filename, errp) < 0) {
116 return;
117 }
118 }
119
120 #else
121
122 static void qemu_chr_open_pipe(Chardev *chr,
123 ChardevBackend *backend,
124 bool *be_opened,
125 Error **errp)
126 {
127 ChardevHostdev *opts = backend->u.pipe.data;
128 int fd_in, fd_out;
129 char *filename_in;
130 char *filename_out;
131 const char *filename = opts->device;
132
133 filename_in = g_strdup_printf("%s.in", filename);
134 filename_out = g_strdup_printf("%s.out", filename);
135 TFR(fd_in = qemu_open_old(filename_in, O_RDWR | O_BINARY));
136 TFR(fd_out = qemu_open_old(filename_out, O_RDWR | O_BINARY));
137 g_free(filename_in);
138 g_free(filename_out);
139 if (fd_in < 0 || fd_out < 0) {
140 if (fd_in >= 0) {
141 close(fd_in);
142 }
143 if (fd_out >= 0) {
144 close(fd_out);
145 }
146 TFR(fd_in = fd_out = qemu_open_old(filename, O_RDWR | O_BINARY));
147 if (fd_in < 0) {
148 error_setg_file_open(errp, errno, filename);
149 return;
150 }
151 }
152 qemu_chr_open_fd(chr, fd_in, fd_out);
153 }
154
155 #endif /* !_WIN32 */
156
157 static void qemu_chr_parse_pipe(QemuOpts *opts, ChardevBackend *backend,
158 Error **errp)
159 {
160 const char *device = qemu_opt_get(opts, "path");
161 ChardevHostdev *dev;
162
163 if (device == NULL) {
164 error_setg(errp, "chardev: pipe: no device path given");
165 return;
166 }
167 backend->type = CHARDEV_BACKEND_KIND_PIPE;
168 dev = backend->u.pipe.data = g_new0(ChardevHostdev, 1);
169 qemu_chr_parse_common(opts, qapi_ChardevHostdev_base(dev));
170 dev->device = g_strdup(device);
171 }
172
173 static void char_pipe_class_init(ObjectClass *oc, void *data)
174 {
175 ChardevClass *cc = CHARDEV_CLASS(oc);
176
177 cc->parse = qemu_chr_parse_pipe;
178 cc->open = qemu_chr_open_pipe;
179 }
180
181 static const TypeInfo char_pipe_type_info = {
182 .name = TYPE_CHARDEV_PIPE,
183 #ifdef _WIN32
184 .parent = TYPE_CHARDEV_WIN,
185 #else
186 .parent = TYPE_CHARDEV_FD,
187 #endif
188 .class_init = char_pipe_class_init,
189 };
190
191 static void register_types(void)
192 {
193 type_register_static(&char_pipe_type_info);
194 }
195
196 type_init(register_types);