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