qemu-config.c

   1 #include "qemu-common.h"
   2 #include "qemu-error.h"
   3 #include "qemu-option.h"
   4 #include "qemu-config.h"
   5 #include "hw/qdev.h"
   6
   7 static QemuOptsList qemu_drive_opts = {
   8     .name = "drive",
   9     .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head),
  10     .desc = {
  11         {
  12             .name = "bus",
  13             .type = QEMU_OPT_NUMBER,
  14             .help = "bus number",
  15         },{
  16             .name = "unit",
  17             .type = QEMU_OPT_NUMBER,
  18             .help = "unit number (i.e. lun for scsi)",
  19         },{
  20             .name = "if",
  21             .type = QEMU_OPT_STRING,
  22             .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
  23         },{
  24             .name = "index",
  25             .type = QEMU_OPT_NUMBER,
  26             .help = "index number",
  27         },{
  28             .name = "cyls",
  29             .type = QEMU_OPT_NUMBER,
  30             .help = "number of cylinders (ide disk geometry)",
  31         },{
  32             .name = "heads",
  33             .type = QEMU_OPT_NUMBER,
  34             .help = "number of heads (ide disk geometry)",
  35         },{
  36             .name = "secs",
  37             .type = QEMU_OPT_NUMBER,
  38             .help = "number of sectors (ide disk geometry)",
  39         },{
  40             .name = "trans",
  41             .type = QEMU_OPT_STRING,
  42             .help = "chs translation (auto, lba. none)",
  43         },{
  44             .name = "media",
  45             .type = QEMU_OPT_STRING,
  46             .help = "media type (disk, cdrom)",
  47         },{
  48             .name = "snapshot",
  49             .type = QEMU_OPT_BOOL,
  50             .help = "enable/disable snapshot mode",
  51         },{
  52             .name = "file",
  53             .type = QEMU_OPT_STRING,
  54             .help = "disk image",
  55         },{
  56             .name = "cache",
  57             .type = QEMU_OPT_STRING,
  58             .help = "host cache usage (none, writeback, writethrough, "
  59                     "directsync, unsafe)",
  60         },{
  61             .name = "aio",
  62             .type = QEMU_OPT_STRING,
  63             .help = "host AIO implementation (threads, native)",
  64         },{
  65             .name = "format",
  66             .type = QEMU_OPT_STRING,
  67             .help = "disk format (raw, qcow2, ...)",
  68         },{
  69             .name = "serial",
  70             .type = QEMU_OPT_STRING,
  71             .help = "disk serial number",
  72         },{
  73             .name = "rerror",
  74             .type = QEMU_OPT_STRING,
  75             .help = "read error action",
  76         },{
  77             .name = "werror",
  78             .type = QEMU_OPT_STRING,
  79             .help = "write error action",
  80         },{
  81             .name = "addr",
  82             .type = QEMU_OPT_STRING,
  83             .help = "pci address (virtio only)",
  84         },{
  85             .name = "readonly",
  86             .type = QEMU_OPT_BOOL,
  87             .help = "open drive file as read-only",
  88         },{
  89             .name = "iops",
  90             .type = QEMU_OPT_NUMBER,
  91             .help = "limit total I/O operations per second",
  92         },{
  93             .name = "iops_rd",
  94             .type = QEMU_OPT_NUMBER,
  95             .help = "limit read operations per second",
  96         },{
  97             .name = "iops_wr",
  98             .type = QEMU_OPT_NUMBER,
  99             .help = "limit write operations per second",
 100         },{
 101             .name = "bps",
 102             .type = QEMU_OPT_NUMBER,
 103             .help = "limit total bytes per second",
 104         },{
 105             .name = "bps_rd",
 106             .type = QEMU_OPT_NUMBER,
 107             .help = "limit read bytes per second",
 108         },{
 109             .name = "bps_wr",
 110             .type = QEMU_OPT_NUMBER,
 111             .help = "limit write bytes per second",
 112         },{
 113             .name = "copy-on-read",
 114             .type = QEMU_OPT_BOOL,
 115             .help = "copy read data from backing file into image file",
 116         },
 117         { /* end of list */ }
 118     },
 119 };
 120
 121 static QemuOptsList qemu_iscsi_opts = {
 122     .name = "iscsi",
 123     .head = QTAILQ_HEAD_INITIALIZER(qemu_iscsi_opts.head),
 124     .desc = {
 125         {
 126             .name = "user",
 127             .type = QEMU_OPT_STRING,
 128             .help = "username for CHAP authentication to target",
 129         },{
 130             .name = "password",
 131             .type = QEMU_OPT_STRING,
 132             .help = "password for CHAP authentication to target",
 133         },{
 134             .name = "header-digest",
 135             .type = QEMU_OPT_STRING,
 136             .help = "HeaderDigest setting. "
 137                     "{CRC32C|CRC32C-NONE|NONE-CRC32C|NONE}",
 138         },{
 139             .name = "initiator-name",
 140             .type = QEMU_OPT_STRING,
 141             .help = "Initiator iqn name to use when connecting",
 142         },
 143         { /* end of list */ }
 144     },
 145 };
 146
 147 static QemuOptsList qemu_chardev_opts = {
 148     .name = "chardev",
 149     .implied_opt_name = "backend",
 150     .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
 151     .desc = {
 152         {
 153             .name = "backend",
 154             .type = QEMU_OPT_STRING,
 155         },{
 156             .name = "path",
 157             .type = QEMU_OPT_STRING,
 158         },{
 159             .name = "host",
 160             .type = QEMU_OPT_STRING,
 161         },{
 162             .name = "port",
 163             .type = QEMU_OPT_STRING,
 164         },{
 165             .name = "localaddr",
 166             .type = QEMU_OPT_STRING,
 167         },{
 168             .name = "localport",
 169             .type = QEMU_OPT_STRING,
 170         },{
 171             .name = "to",
 172             .type = QEMU_OPT_NUMBER,
 173         },{
 174             .name = "ipv4",
 175             .type = QEMU_OPT_BOOL,
 176         },{
 177             .name = "ipv6",
 178             .type = QEMU_OPT_BOOL,
 179         },{
 180             .name = "wait",
 181             .type = QEMU_OPT_BOOL,
 182         },{
 183             .name = "server",
 184             .type = QEMU_OPT_BOOL,
 185         },{
 186             .name = "delay",
 187             .type = QEMU_OPT_BOOL,
 188         },{
 189             .name = "telnet",
 190             .type = QEMU_OPT_BOOL,
 191         },{
 192             .name = "width",
 193             .type = QEMU_OPT_NUMBER,
 194         },{
 195             .name = "height",
 196             .type = QEMU_OPT_NUMBER,
 197         },{
 198             .name = "cols",
 199             .type = QEMU_OPT_NUMBER,
 200         },{
 201             .name = "rows",
 202             .type = QEMU_OPT_NUMBER,
 203         },{
 204             .name = "mux",
 205             .type = QEMU_OPT_BOOL,
 206         },{
 207             .name = "signal",
 208             .type = QEMU_OPT_BOOL,
 209         },{
 210             .name = "name",
 211             .type = QEMU_OPT_STRING,
 212         },{
 213             .name = "debug",
 214             .type = QEMU_OPT_NUMBER,
 215         },
 216         { /* end of list */ }
 217     },
 218 };
 219
 220 QemuOptsList qemu_fsdev_opts = {
 221     .name = "fsdev",
 222     .implied_opt_name = "fsdriver",
 223     .head = QTAILQ_HEAD_INITIALIZER(qemu_fsdev_opts.head),
 224     .desc = {
 225         {
 226             .name = "fsdriver",
 227             .type = QEMU_OPT_STRING,
 228         }, {
 229             .name = "path",
 230             .type = QEMU_OPT_STRING,
 231         }, {
 232             .name = "security_model",
 233             .type = QEMU_OPT_STRING,
 234         }, {
 235             .name = "writeout",
 236             .type = QEMU_OPT_STRING,
 237         }, {
 238             .name = "readonly",
 239             .type = QEMU_OPT_BOOL,
 240
 241         }, {
 242             .name = "socket",
 243             .type = QEMU_OPT_STRING,
 244         }, {
 245             .name = "sock_fd",
 246             .type = QEMU_OPT_NUMBER,
 247         },
 248
 249         { /*End of list */ }
 250     },
 251 };
 252
 253 QemuOptsList qemu_virtfs_opts = {
 254     .name = "virtfs",
 255     .implied_opt_name = "fsdriver",
 256     .head = QTAILQ_HEAD_INITIALIZER(qemu_virtfs_opts.head),
 257     .desc = {
 258         {
 259             .name = "fsdriver",
 260             .type = QEMU_OPT_STRING,
 261         }, {
 262             .name = "path",
 263             .type = QEMU_OPT_STRING,
 264         }, {
 265             .name = "mount_tag",
 266             .type = QEMU_OPT_STRING,
 267         }, {
 268             .name = "security_model",
 269             .type = QEMU_OPT_STRING,
 270         }, {
 271             .name = "writeout",
 272             .type = QEMU_OPT_STRING,
 273         }, {
 274             .name = "readonly",
 275             .type = QEMU_OPT_BOOL,
 276         }, {
 277             .name = "socket",
 278             .type = QEMU_OPT_STRING,
 279         }, {
 280             .name = "sock_fd",
 281             .type = QEMU_OPT_NUMBER,
 282         },
 283
 284         { /*End of list */ }
 285     },
 286 };
 287
 288 static QemuOptsList qemu_device_opts = {
 289     .name = "device",
 290     .implied_opt_name = "driver",
 291     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 292     .desc = {
 293         /*
 294          * no elements => accept any
 295          * sanity checking will happen later
 296          * when setting device properties
 297          */
 298         { /* end of list */ }
 299     },
 300 };
 301
 302 static QemuOptsList qemu_netdev_opts = {
 303     .name = "netdev",
 304     .implied_opt_name = "type",
 305     .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head),
 306     .desc = {
 307         /*
 308          * no elements => accept any params
 309          * validation will happen later
 310          */
 311         { /* end of list */ }
 312     },
 313 };
 314
 315 static QemuOptsList qemu_net_opts = {
 316     .name = "net",
 317     .implied_opt_name = "type",
 318     .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head),
 319     .desc = {
 320         /*
 321          * no elements => accept any params
 322          * validation will happen later
 323          */
 324         { /* end of list */ }
 325     },
 326 };
 327
 328 static QemuOptsList qemu_rtc_opts = {
 329     .name = "rtc",
 330     .head = QTAILQ_HEAD_INITIALIZER(qemu_rtc_opts.head),
 331     .desc = {
 332         {
 333             .name = "base",
 334             .type = QEMU_OPT_STRING,
 335         },{
 336             .name = "clock",
 337             .type = QEMU_OPT_STRING,
 338         },{
 339             .name = "driftfix",
 340             .type = QEMU_OPT_STRING,
 341         },
 342         { /* end of list */ }
 343     },
 344 };
 345
 346 static QemuOptsList qemu_global_opts = {
 347     .name = "global",
 348     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 349     .desc = {
 350         {
 351             .name = "driver",
 352             .type = QEMU_OPT_STRING,
 353         },{
 354             .name = "property",
 355             .type = QEMU_OPT_STRING,
 356         },{
 357             .name = "value",
 358             .type = QEMU_OPT_STRING,
 359         },
 360         { /* end of list */ }
 361     },
 362 };
 363
 364 static QemuOptsList qemu_mon_opts = {
 365     .name = "mon",
 366     .implied_opt_name = "chardev",
 367     .head = QTAILQ_HEAD_INITIALIZER(qemu_mon_opts.head),
 368     .desc = {
 369         {
 370             .name = "mode",
 371             .type = QEMU_OPT_STRING,
 372         },{
 373             .name = "chardev",
 374             .type = QEMU_OPT_STRING,
 375         },{
 376             .name = "default",
 377             .type = QEMU_OPT_BOOL,
 378         },{
 379             .name = "pretty",
 380             .type = QEMU_OPT_BOOL,
 381         },
 382         { /* end of list */ }
 383     },
 384 };
 385
 386 static QemuOptsList qemu_trace_opts = {
 387     .name = "trace",
 388     .implied_opt_name = "trace",
 389     .head = QTAILQ_HEAD_INITIALIZER(qemu_trace_opts.head),
 390     .desc = {
 391         {
 392             .name = "events",
 393             .type = QEMU_OPT_STRING,
 394         },{
 395             .name = "file",
 396             .type = QEMU_OPT_STRING,
 397         },
 398         { /* end of list */ }
 399     },
 400 };
 401
 402 static QemuOptsList qemu_cpudef_opts = {
 403     .name = "cpudef",
 404     .head = QTAILQ_HEAD_INITIALIZER(qemu_cpudef_opts.head),
 405     .desc = {
 406         {
 407             .name = "name",
 408             .type = QEMU_OPT_STRING,
 409         },{
 410             .name = "level",
 411             .type = QEMU_OPT_NUMBER,
 412         },{
 413             .name = "vendor",
 414             .type = QEMU_OPT_STRING,
 415         },{
 416             .name = "family",
 417             .type = QEMU_OPT_NUMBER,
 418         },{
 419             .name = "model",
 420             .type = QEMU_OPT_NUMBER,
 421         },{
 422             .name = "stepping",
 423             .type = QEMU_OPT_NUMBER,
 424         },{
 425             .name = "feature_edx",      /* cpuid 0000_0001.edx */
 426             .type = QEMU_OPT_STRING,
 427         },{
 428             .name = "feature_ecx",      /* cpuid 0000_0001.ecx */
 429             .type = QEMU_OPT_STRING,
 430         },{
 431             .name = "extfeature_edx",   /* cpuid 8000_0001.edx */
 432             .type = QEMU_OPT_STRING,
 433         },{
 434             .name = "extfeature_ecx",   /* cpuid 8000_0001.ecx */
 435             .type = QEMU_OPT_STRING,
 436         },{
 437             .name = "xlevel",
 438             .type = QEMU_OPT_NUMBER,
 439         },{
 440             .name = "model_id",
 441             .type = QEMU_OPT_STRING,
 442         },{
 443             .name = "vendor_override",
 444             .type = QEMU_OPT_NUMBER,
 445         },
 446         { /* end of list */ }
 447     },
 448 };
 449
 450 QemuOptsList qemu_spice_opts = {
 451     .name = "spice",
 452     .head = QTAILQ_HEAD_INITIALIZER(qemu_spice_opts.head),
 453     .desc = {
 454         {
 455             .name = "port",
 456             .type = QEMU_OPT_NUMBER,
 457         },{
 458             .name = "tls-port",
 459             .type = QEMU_OPT_NUMBER,
 460         },{
 461             .name = "addr",
 462             .type = QEMU_OPT_STRING,
 463         },{
 464             .name = "ipv4",
 465             .type = QEMU_OPT_BOOL,
 466         },{
 467             .name = "ipv6",
 468             .type = QEMU_OPT_BOOL,
 469         },{
 470             .name = "password",
 471             .type = QEMU_OPT_STRING,
 472         },{
 473             .name = "disable-ticketing",
 474             .type = QEMU_OPT_BOOL,
 475         },{
 476             .name = "disable-copy-paste",
 477             .type = QEMU_OPT_BOOL,
 478         },{
 479             .name = "sasl",
 480             .type = QEMU_OPT_BOOL,
 481         },{
 482             .name = "x509-dir",
 483             .type = QEMU_OPT_STRING,
 484         },{
 485             .name = "x509-key-file",
 486             .type = QEMU_OPT_STRING,
 487         },{
 488             .name = "x509-key-password",
 489             .type = QEMU_OPT_STRING,
 490         },{
 491             .name = "x509-cert-file",
 492             .type = QEMU_OPT_STRING,
 493         },{
 494             .name = "x509-cacert-file",
 495             .type = QEMU_OPT_STRING,
 496         },{
 497             .name = "x509-dh-key-file",
 498             .type = QEMU_OPT_STRING,
 499         },{
 500             .name = "tls-ciphers",
 501             .type = QEMU_OPT_STRING,
 502         },{
 503             .name = "tls-channel",
 504             .type = QEMU_OPT_STRING,
 505         },{
 506             .name = "plaintext-channel",
 507             .type = QEMU_OPT_STRING,
 508         },{
 509             .name = "image-compression",
 510             .type = QEMU_OPT_STRING,
 511         },{
 512             .name = "jpeg-wan-compression",
 513             .type = QEMU_OPT_STRING,
 514         },{
 515             .name = "zlib-glz-wan-compression",
 516             .type = QEMU_OPT_STRING,
 517         },{
 518             .name = "streaming-video",
 519             .type = QEMU_OPT_STRING,
 520         },{
 521             .name = "agent-mouse",
 522             .type = QEMU_OPT_BOOL,
 523         },{
 524             .name = "playback-compression",
 525             .type = QEMU_OPT_BOOL,
 526         },
 527         { /* end of list */ }
 528     },
 529 };
 530
 531 QemuOptsList qemu_option_rom_opts = {
 532     .name = "option-rom",
 533     .implied_opt_name = "romfile",
 534     .head = QTAILQ_HEAD_INITIALIZER(qemu_option_rom_opts.head),
 535     .desc = {
 536         {
 537             .name = "bootindex",
 538             .type = QEMU_OPT_NUMBER,
 539         }, {
 540             .name = "romfile",
 541             .type = QEMU_OPT_STRING,
 542         },
 543         { /* end of list */ }
 544     },
 545 };
 546
 547 static QemuOptsList qemu_machine_opts = {
 548     .name = "machine",
 549     .implied_opt_name = "type",
 550     .merge_lists = true,
 551     .head = QTAILQ_HEAD_INITIALIZER(qemu_machine_opts.head),
 552     .desc = {
 553         {
 554             .name = "type",
 555             .type = QEMU_OPT_STRING,
 556             .help = "emulated machine"
 557         }, {
 558             .name = "accel",
 559             .type = QEMU_OPT_STRING,
 560             .help = "accelerator list",
 561         }, {
 562             .name = "kernel_irqchip",
 563             .type = QEMU_OPT_BOOL,
 564             .help = "use KVM in-kernel irqchip",
 565         }, {
 566             .name = "kvm_shadow_mem",
 567             .type = QEMU_OPT_SIZE,
 568             .help = "KVM shadow MMU size",
 569         }, {
 570             .name = "kernel",
 571             .type = QEMU_OPT_STRING,
 572             .help = "Linux kernel image file",
 573         }, {
 574             .name = "initrd",
 575             .type = QEMU_OPT_STRING,
 576             .help = "Linux initial ramdisk file",
 577         }, {
 578             .name = "append",
 579             .type = QEMU_OPT_STRING,
 580             .help = "Linux kernel command line",
 581         },
 582         { /* End of list */ }
 583     },
 584 };
 585
 586 QemuOptsList qemu_boot_opts = {
 587     .name = "boot-opts",
 588     .head = QTAILQ_HEAD_INITIALIZER(qemu_boot_opts.head),
 589     .desc = {
 590         /* the three names below are not used now */
 591         {
 592             .name = "order",
 593             .type = QEMU_OPT_STRING,
 594         }, {
 595             .name = "once",
 596             .type = QEMU_OPT_STRING,
 597         }, {
 598             .name = "menu",
 599             .type = QEMU_OPT_STRING,
 600         /* following are really used */
 601         }, {
 602             .name = "splash",
 603             .type = QEMU_OPT_STRING,
 604         }, {
 605             .name = "splash-time",
 606             .type = QEMU_OPT_STRING,
 607         },
 608         { /*End of list */ }
 609     },
 610 };
 611
 612 static QemuOptsList *vm_config_groups[32] = {
 613     &qemu_drive_opts,
 614     &qemu_chardev_opts,
 615     &qemu_device_opts,
 616     &qemu_netdev_opts,
 617     &qemu_net_opts,
 618     &qemu_rtc_opts,
 619     &qemu_global_opts,
 620     &qemu_mon_opts,
 621     &qemu_cpudef_opts,
 622     &qemu_trace_opts,
 623     &qemu_option_rom_opts,
 624     &qemu_machine_opts,
 625     &qemu_boot_opts,
 626     &qemu_iscsi_opts,
 627     NULL,
 628 };
 629
 630 static QemuOptsList *find_list(QemuOptsList **lists, const char *group)
 631 {
 632     int i;
 633
 634     for (i = 0; lists[i] != NULL; i++) {
 635         if (strcmp(lists[i]->name, group) == 0)
 636             break;
 637     }
 638     if (lists[i] == NULL) {
 639         error_report("there is no option group \"%s\"", group);
 640     }
 641     return lists[i];
 642 }
 643
 644 QemuOptsList *qemu_find_opts(const char *group)
 645 {
 646     return find_list(vm_config_groups, group);
 647 }
 648
 649 void qemu_add_opts(QemuOptsList *list)
 650 {
 651     int entries, i;
 652
 653     entries = ARRAY_SIZE(vm_config_groups);
 654     entries--; /* keep list NULL terminated */
 655     for (i = 0; i < entries; i++) {
 656         if (vm_config_groups[i] == NULL) {
 657             vm_config_groups[i] = list;
 658             return;
 659         }
 660     }
 661     fprintf(stderr, "ran out of space in vm_config_groups");
 662     abort();
 663 }
 664
 665 int qemu_set_option(const char *str)
 666 {
 667     char group[64], id[64], arg[64];
 668     QemuOptsList *list;
 669     QemuOpts *opts;
 670     int rc, offset;
 671
 672     rc = sscanf(str, "%63[^.].%63[^.].%63[^=]%n", group, id, arg, &offset);
 673     if (rc < 3 || str[offset] != '=') {
 674         error_report("can't parse: \"%s\"", str);
 675         return -1;
 676     }
 677
 678     list = qemu_find_opts(group);
 679     if (list == NULL) {
 680         return -1;
 681     }
 682
 683     opts = qemu_opts_find(list, id);
 684     if (!opts) {
 685         error_report("there is no %s \"%s\" defined",
 686                      list->name, id);
 687         return -1;
 688     }
 689
 690     if (qemu_opt_set(opts, arg, str+offset+1) == -1) {
 691         return -1;
 692     }
 693     return 0;
 694 }
 695
 696 int qemu_global_option(const char *str)
 697 {
 698     char driver[64], property[64];
 699     QemuOpts *opts;
 700     int rc, offset;
 701
 702     rc = sscanf(str, "%63[^.].%63[^=]%n", driver, property, &offset);
 703     if (rc < 2 || str[offset] != '=') {
 704         error_report("can't parse: \"%s\"", str);
 705         return -1;
 706     }
 707
 708     opts = qemu_opts_create(&qemu_global_opts, NULL, 0);
 709     qemu_opt_set(opts, "driver", driver);
 710     qemu_opt_set(opts, "property", property);
 711     qemu_opt_set(opts, "value", str+offset+1);
 712     return 0;
 713 }
 714
 715 struct ConfigWriteData {
 716     QemuOptsList *list;
 717     FILE *fp;
 718 };
 719
 720 static int config_write_opt(const char *name, const char *value, void *opaque)
 721 {
 722     struct ConfigWriteData *data = opaque;
 723
 724     fprintf(data->fp, "  %s = \"%s\"\n", name, value);
 725     return 0;
 726 }
 727
 728 static int config_write_opts(QemuOpts *opts, void *opaque)
 729 {
 730     struct ConfigWriteData *data = opaque;
 731     const char *id = qemu_opts_id(opts);
 732
 733     if (id) {
 734         fprintf(data->fp, "[%s \"%s\"]\n", data->list->name, id);
 735     } else {
 736         fprintf(data->fp, "[%s]\n", data->list->name);
 737     }
 738     qemu_opt_foreach(opts, config_write_opt, data, 0);
 739     fprintf(data->fp, "\n");
 740     return 0;
 741 }
 742
 743 void qemu_config_write(FILE *fp)
 744 {
 745     struct ConfigWriteData data = { .fp = fp };
 746     QemuOptsList **lists = vm_config_groups;
 747     int i;
 748
 749     fprintf(fp, "# qemu config file\n\n");
 750     for (i = 0; lists[i] != NULL; i++) {
 751         data.list = lists[i];
 752         qemu_opts_foreach(data.list, config_write_opts, &data, 0);
 753     }
 754 }
 755
 756 int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname)
 757 {
 758     char line[1024], group[64], id[64], arg[64], value[1024];
 759     Location loc;
 760     QemuOptsList *list = NULL;
 761     QemuOpts *opts = NULL;
 762     int res = -1, lno = 0;
 763
 764     loc_push_none(&loc);
 765     while (fgets(line, sizeof(line), fp) != NULL) {
 766         loc_set_file(fname, ++lno);
 767         if (line[0] == '\n') {
 768             /* skip empty lines */
 769             continue;
 770         }
 771         if (line[0] == '#') {
 772             /* comment */
 773             continue;
 774         }
 775         if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) {
 776             /* group with id */
 777             list = find_list(lists, group);
 778             if (list == NULL)
 779                 goto out;
 780             opts = qemu_opts_create(list, id, 1);
 781             continue;
 782         }
 783         if (sscanf(line, "[%63[^]]]", group) == 1) {
 784             /* group without id */
 785             list = find_list(lists, group);
 786             if (list == NULL)
 787                 goto out;
 788             opts = qemu_opts_create(list, NULL, 0);
 789             continue;
 790         }
 791         if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2) {
 792             /* arg = value */
 793             if (opts == NULL) {
 794                 error_report("no group defined");
 795                 goto out;
 796             }
 797             if (qemu_opt_set(opts, arg, value) != 0) {
 798                 goto out;
 799             }
 800             continue;
 801         }
 802         error_report("parse error");
 803         goto out;
 804     }
 805     if (ferror(fp)) {
 806         error_report("error reading file");
 807         goto out;
 808     }
 809     res = 0;
 810 out:
 811     loc_pop(&loc);
 812     return res;
 813 }
 814
 815 int qemu_read_config_file(const char *filename)
 816 {
 817     FILE *f = fopen(filename, "r");
 818     int ret;
 819
 820     if (f == NULL) {
 821         return -errno;
 822     }
 823
 824     ret = qemu_config_parse(f, vm_config_groups, filename);
 825     fclose(f);
 826
 827     if (ret == 0) {
 828         return 0;
 829     } else {
 830         return -EINVAL;
 831     }
 832 }