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