| 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 bool file_chr_open(Chardev *chr, ChardevBackend *backend, Error **errp) |
| 38 | { |
| 39 | ChardevFile *file = backend->u.file.data; |
| 40 | #ifdef _WIN32 |
| 41 | HANDLE out; |
| 42 | DWORD accessmode; |
| 43 | DWORD flags; |
| 44 | |
| 45 | if (file->in) { |
| 46 | error_setg(errp, "input file not supported"); |
| 47 | return false; |
| 48 | } |
| 49 | |
| 50 | if (file->has_append && file->append) { |
| 51 | /* Append to file if it already exists. */ |
| 52 | accessmode = FILE_GENERIC_WRITE & ~FILE_WRITE_DATA; |
| 53 | flags = OPEN_ALWAYS; |
| 54 | } else { |
| 55 | /* Truncate file if it already exists. */ |
| 56 | accessmode = GENERIC_WRITE; |
| 57 | flags = CREATE_ALWAYS; |
| 58 | } |
| 59 | |
| 60 | out = CreateFile(file->out, accessmode, FILE_SHARE_READ, NULL, flags, |
| 61 | FILE_ATTRIBUTE_NORMAL, NULL); |
| 62 | if (out == INVALID_HANDLE_VALUE) { |
| 63 | error_setg(errp, "open %s failed", file->out); |
| 64 | return false; |
| 65 | } |
| 66 | |
| 67 | win_chr_set_file(chr, out, false); |
| 68 | #else |
| 69 | int flags, in = -1, out; |
| 70 | |
| 71 | flags = O_WRONLY | O_CREAT | O_BINARY; |
| 72 | if (file->has_append && file->append) { |
| 73 | flags |= O_APPEND; |
| 74 | } else { |
| 75 | flags |= O_TRUNC; |
| 76 | } |
| 77 | |
| 78 | out = qmp_chardev_open_file_source(file->out, flags, errp); |
| 79 | if (out < 0) { |
| 80 | return false; |
| 81 | } |
| 82 | |
| 83 | if (file->in) { |
| 84 | flags = O_RDONLY; |
| 85 | in = qmp_chardev_open_file_source(file->in, flags, errp); |
| 86 | if (in < 0) { |
| 87 | qemu_close(out); |
| 88 | return false; |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | if (!qemu_chr_open_fd(chr, in, out, errp)) { |
| 93 | qemu_close(out); |
| 94 | if (in >= 0) { |
| 95 | qemu_close(in); |
| 96 | } |
| 97 | return false; |
| 98 | } |
| 99 | #endif |
| 100 | |
| 101 | qemu_chr_be_event(chr, CHR_EVENT_OPENED); |
| 102 | return true; |
| 103 | } |
| 104 | |
| 105 | static void file_chr_parse(QemuOpts *opts, ChardevBackend *backend, |
| 106 | Error **errp) |
| 107 | { |
| 108 | const char *path = qemu_opt_get(opts, "path"); |
| 109 | const char *inpath = qemu_opt_get(opts, "input-path"); |
| 110 | ChardevFile *file; |
| 111 | |
| 112 | backend->type = CHARDEV_BACKEND_KIND_FILE; |
| 113 | if (path == NULL) { |
| 114 | error_setg(errp, "chardev: file: no filename given"); |
| 115 | return; |
| 116 | } |
| 117 | #ifdef _WIN32 |
| 118 | if (inpath) { |
| 119 | error_setg(errp, "chardev: file: input-path not supported on Windows"); |
| 120 | return; |
| 121 | } |
| 122 | #endif |
| 123 | file = backend->u.file.data = g_new0(ChardevFile, 1); |
| 124 | qemu_chr_parse_common(opts, qapi_ChardevFile_base(file)); |
| 125 | file->out = g_strdup(path); |
| 126 | file->in = g_strdup(inpath); |
| 127 | |
| 128 | file->has_append = true; |
| 129 | file->append = qemu_opt_get_bool(opts, "append", false); |
| 130 | } |
| 131 | |
| 132 | static void char_file_class_init(ObjectClass *oc, const void *data) |
| 133 | { |
| 134 | ChardevClass *cc = CHARDEV_CLASS(oc); |
| 135 | |
| 136 | cc->chr_parse = file_chr_parse; |
| 137 | cc->chr_open = file_chr_open; |
| 138 | } |
| 139 | |
| 140 | static const TypeInfo char_file_type_info = { |
| 141 | .name = TYPE_CHARDEV_FILE, |
| 142 | #ifdef _WIN32 |
| 143 | .parent = TYPE_CHARDEV_WIN, |
| 144 | #else |
| 145 | .parent = TYPE_CHARDEV_FD, |
| 146 | #endif |
| 147 | .class_init = char_file_class_init, |
| 148 | }; |
| 149 | |
| 150 | static void register_types(void) |
| 151 | { |
| 152 | type_register_static(&char_file_type_info); |
| 153 | } |
| 154 | |
| 155 | type_init(register_types); |