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->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->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