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             .name = "boot",
 118             .type = QEMU_OPT_BOOL,
 119             .help = "(deprecated, ignored)",
 120         },
 121         { /* end of list */ }
 122     },
 123 };
 124
 125 static QemuOptsList qemu_iscsi_opts = {
 126     .name = "iscsi",
 127     .head = QTAILQ_HEAD_INITIALIZER(qemu_iscsi_opts.head),
 128     .desc = {
 129         {
 130             .name = "user",
 131             .type = QEMU_OPT_STRING,
 132             .help = "username for CHAP authentication to target",
 133         },{
 134             .name = "password",
 135             .type = QEMU_OPT_STRING,
 136             .help = "password for CHAP authentication to target",
 137         },{
 138             .name = "header-digest",
 139             .type = QEMU_OPT_STRING,
 140             .help = "HeaderDigest setting. "
 141                     "{CRC32C|CRC32C-NONE|NONE-CRC32C|NONE}",
 142         },{
 143             .name = "initiator-name",
 144             .type = QEMU_OPT_STRING,
 145             .help = "Initiator iqn name to use when connecting",
 146         },
 147         { /* end of list */ }
 148     },
 149 };
 150
 151 static QemuOptsList qemu_chardev_opts = {
 152     .name = "chardev",
 153     .implied_opt_name = "backend",
 154     .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
 155     .desc = {
 156         {
 157             .name = "backend",
 158             .type = QEMU_OPT_STRING,
 159         },{
 160             .name = "path",
 161             .type = QEMU_OPT_STRING,
 162         },{
 163             .name = "host",
 164             .type = QEMU_OPT_STRING,
 165         },{
 166             .name = "port",
 167             .type = QEMU_OPT_STRING,
 168         },{
 169             .name = "localaddr",
 170             .type = QEMU_OPT_STRING,
 171         },{
 172             .name = "localport",
 173             .type = QEMU_OPT_STRING,
 174         },{
 175             .name = "to",
 176             .type = QEMU_OPT_NUMBER,
 177         },{
 178             .name = "ipv4",
 179             .type = QEMU_OPT_BOOL,
 180         },{
 181             .name = "ipv6",
 182             .type = QEMU_OPT_BOOL,
 183         },{
 184             .name = "wait",
 185             .type = QEMU_OPT_BOOL,
 186         },{
 187             .name = "server",
 188             .type = QEMU_OPT_BOOL,
 189         },{
 190             .name = "delay",
 191             .type = QEMU_OPT_BOOL,
 192         },{
 193             .name = "telnet",
 194             .type = QEMU_OPT_BOOL,
 195         },{
 196             .name = "width",
 197             .type = QEMU_OPT_NUMBER,
 198         },{
 199             .name = "height",
 200             .type = QEMU_OPT_NUMBER,
 201         },{
 202             .name = "cols",
 203             .type = QEMU_OPT_NUMBER,
 204         },{
 205             .name = "rows",
 206             .type = QEMU_OPT_NUMBER,
 207         },{
 208             .name = "mux",
 209             .type = QEMU_OPT_BOOL,
 210         },{
 211             .name = "signal",
 212             .type = QEMU_OPT_BOOL,
 213         },{
 214             .name = "name",
 215             .type = QEMU_OPT_STRING,
 216         },{
 217             .name = "debug",
 218             .type = QEMU_OPT_NUMBER,
 219         },
 220         { /* end of list */ }
 221     },
 222 };
 223
 224 QemuOptsList qemu_fsdev_opts = {
 225     .name = "fsdev",
 226     .implied_opt_name = "fsdriver",
 227     .head = QTAILQ_HEAD_INITIALIZER(qemu_fsdev_opts.head),
 228     .desc = {
 229         {
 230             .name = "fsdriver",
 231             .type = QEMU_OPT_STRING,
 232         }, {
 233             .name = "path",
 234             .type = QEMU_OPT_STRING,
 235         }, {
 236             .name = "security_model",
 237             .type = QEMU_OPT_STRING,
 238         }, {
 239             .name = "writeout",
 240             .type = QEMU_OPT_STRING,
 241         }, {
 242             .name = "readonly",
 243             .type = QEMU_OPT_BOOL,
 244
 245         }, {
 246             .name = "socket",
 247             .type = QEMU_OPT_STRING,
 248         }, {
 249             .name = "sock_fd",
 250             .type = QEMU_OPT_NUMBER,
 251         },
 252
 253         { /*End of list */ }
 254     },
 255 };
 256
 257 QemuOptsList qemu_virtfs_opts = {
 258     .name = "virtfs",
 259     .implied_opt_name = "fsdriver",
 260     .head = QTAILQ_HEAD_INITIALIZER(qemu_virtfs_opts.head),
 261     .desc = {
 262         {
 263             .name = "fsdriver",
 264             .type = QEMU_OPT_STRING,
 265         }, {
 266             .name = "path",
 267             .type = QEMU_OPT_STRING,
 268         }, {
 269             .name = "mount_tag",
 270             .type = QEMU_OPT_STRING,
 271         }, {
 272             .name = "security_model",
 273             .type = QEMU_OPT_STRING,
 274         }, {
 275             .name = "writeout",
 276             .type = QEMU_OPT_STRING,
 277         }, {
 278             .name = "readonly",
 279             .type = QEMU_OPT_BOOL,
 280         }, {
 281             .name = "socket",
 282             .type = QEMU_OPT_STRING,
 283         }, {
 284             .name = "sock_fd",
 285             .type = QEMU_OPT_NUMBER,
 286         },
 287
 288         { /*End of list */ }
 289     },
 290 };
 291
 292 static QemuOptsList qemu_device_opts = {
 293     .name = "device",
 294     .implied_opt_name = "driver",
 295     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 296     .desc = {
 297         /*
 298          * no elements => accept any
 299          * sanity checking will happen later
 300          * when setting device properties
 301          */
 302         { /* end of list */ }
 303     },
 304 };
 305
 306 static QemuOptsList qemu_netdev_opts = {
 307     .name = "netdev",
 308     .implied_opt_name = "type",
 309     .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head),
 310     .desc = {
 311         /*
 312          * no elements => accept any params
 313          * validation will happen later
 314          */
 315         { /* end of list */ }
 316     },
 317 };
 318
 319 static QemuOptsList qemu_net_opts = {
 320     .name = "net",
 321     .implied_opt_name = "type",
 322     .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head),
 323     .desc = {
 324         /*
 325          * no elements => accept any params
 326          * validation will happen later
 327          */
 328         { /* end of list */ }
 329     },
 330 };
 331
 332 static QemuOptsList qemu_rtc_opts = {
 333     .name = "rtc",
 334     .head = QTAILQ_HEAD_INITIALIZER(qemu_rtc_opts.head),
 335     .desc = {
 336         {
 337             .name = "base",
 338             .type = QEMU_OPT_STRING,
 339         },{
 340             .name = "clock",
 341             .type = QEMU_OPT_STRING,
 342         },{
 343             .name = "driftfix",
 344             .type = QEMU_OPT_STRING,
 345         },
 346         { /* end of list */ }
 347     },
 348 };
 349
 350 static QemuOptsList qemu_global_opts = {
 351     .name = "global",
 352     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 353     .desc = {
 354         {
 355             .name = "driver",
 356             .type = QEMU_OPT_STRING,
 357         },{
 358             .name = "property",
 359             .type = QEMU_OPT_STRING,
 360         },{
 361             .name = "value",
 362             .type = QEMU_OPT_STRING,
 363         },
 364         { /* end of list */ }
 365     },
 366 };
 367
 368 static QemuOptsList qemu_mon_opts = {
 369     .name = "mon",
 370     .implied_opt_name = "chardev",
 371     .head = QTAILQ_HEAD_INITIALIZER(qemu_mon_opts.head),
 372     .desc = {
 373         {
 374             .name = "mode",
 375             .type = QEMU_OPT_STRING,
 376         },{
 377             .name = "chardev",
 378             .type = QEMU_OPT_STRING,
 379         },{
 380             .name = "default",
 381             .type = QEMU_OPT_BOOL,
 382         },{
 383             .name = "pretty",
 384             .type = QEMU_OPT_BOOL,
 385         },
 386         { /* end of list */ }
 387     },
 388 };
 389
 390 static QemuOptsList qemu_trace_opts = {
 391     .name = "trace",
 392     .implied_opt_name = "trace",
 393     .head = QTAILQ_HEAD_INITIALIZER(qemu_trace_opts.head),
 394     .desc = {
 395         {
 396             .name = "events",
 397             .type = QEMU_OPT_STRING,
 398         },{
 399             .name = "file",
 400             .type = QEMU_OPT_STRING,
 401         },
 402         { /* end of list */ }
 403     },
 404 };
 405
 406 static QemuOptsList qemu_cpudef_opts = {
 407     .name = "cpudef",
 408     .head = QTAILQ_HEAD_INITIALIZER(qemu_cpudef_opts.head),
 409     .desc = {
 410         {
 411             .name = "name",
 412             .type = QEMU_OPT_STRING,
 413         },{
 414             .name = "level",
 415             .type = QEMU_OPT_NUMBER,
 416         },{
 417             .name = "vendor",
 418             .type = QEMU_OPT_STRING,
 419         },{
 420             .name = "family",
 421             .type = QEMU_OPT_NUMBER,
 422         },{
 423             .name = "model",
 424             .type = QEMU_OPT_NUMBER,
 425         },{
 426             .name = "stepping",
 427             .type = QEMU_OPT_NUMBER,
 428         },{
 429             .name = "feature_edx",      /* cpuid 0000_0001.edx */
 430             .type = QEMU_OPT_STRING,
 431         },{
 432             .name = "feature_ecx",      /* cpuid 0000_0001.ecx */
 433             .type = QEMU_OPT_STRING,
 434         },{
 435             .name = "extfeature_edx",   /* cpuid 8000_0001.edx */
 436             .type = QEMU_OPT_STRING,
 437         },{
 438             .name = "extfeature_ecx",   /* cpuid 8000_0001.ecx */
 439             .type = QEMU_OPT_STRING,
 440         },{
 441             .name = "xlevel",
 442             .type = QEMU_OPT_NUMBER,
 443         },{
 444             .name = "model_id",
 445             .type = QEMU_OPT_STRING,
 446         },{
 447             .name = "vendor_override",
 448             .type = QEMU_OPT_NUMBER,
 449         },
 450         { /* end of list */ }
 451     },
 452 };
 453
 454 QemuOptsList qemu_spice_opts = {
 455     .name = "spice",
 456     .head = QTAILQ_HEAD_INITIALIZER(qemu_spice_opts.head),
 457     .desc = {
 458         {
 459             .name = "port",
 460             .type = QEMU_OPT_NUMBER,
 461         },{
 462             .name = "tls-port",
 463             .type = QEMU_OPT_NUMBER,
 464         },{
 465             .name = "addr",
 466             .type = QEMU_OPT_STRING,
 467         },{
 468             .name = "ipv4",
 469             .type = QEMU_OPT_BOOL,
 470         },{
 471             .name = "ipv6",
 472             .type = QEMU_OPT_BOOL,
 473         },{
 474             .name = "password",
 475             .type = QEMU_OPT_STRING,
 476         },{
 477             .name = "disable-ticketing",
 478             .type = QEMU_OPT_BOOL,
 479         },{
 480             .name = "disable-copy-paste",
 481             .type = QEMU_OPT_BOOL,
 482         },{
 483             .name = "sasl",
 484             .type = QEMU_OPT_BOOL,
 485         },{
 486             .name = "x509-dir",
 487             .type = QEMU_OPT_STRING,
 488         },{
 489             .name = "x509-key-file",
 490             .type = QEMU_OPT_STRING,
 491         },{
 492             .name = "x509-key-password",
 493             .type = QEMU_OPT_STRING,
 494         },{
 495             .name = "x509-cert-file",
 496             .type = QEMU_OPT_STRING,
 497         },{
 498             .name = "x509-cacert-file",
 499             .type = QEMU_OPT_STRING,
 500         },{
 501             .name = "x509-dh-key-file",
 502             .type = QEMU_OPT_STRING,
 503         },{
 504             .name = "tls-ciphers",
 505             .type = QEMU_OPT_STRING,
 506         },{
 507             .name = "tls-channel",
 508             .type = QEMU_OPT_STRING,
 509         },{
 510             .name = "plaintext-channel",
 511             .type = QEMU_OPT_STRING,
 512         },{
 513             .name = "image-compression",
 514             .type = QEMU_OPT_STRING,
 515         },{
 516             .name = "jpeg-wan-compression",
 517             .type = QEMU_OPT_STRING,
 518         },{
 519             .name = "zlib-glz-wan-compression",
 520             .type = QEMU_OPT_STRING,
 521         },{
 522             .name = "streaming-video",
 523             .type = QEMU_OPT_STRING,
 524         },{
 525             .name = "agent-mouse",
 526             .type = QEMU_OPT_BOOL,
 527         },{
 528             .name = "playback-compression",
 529             .type = QEMU_OPT_BOOL,
 530         },
 531         { /* end of list */ }
 532     },
 533 };
 534
 535 QemuOptsList qemu_option_rom_opts = {
 536     .name = "option-rom",
 537     .implied_opt_name = "romfile",
 538     .head = QTAILQ_HEAD_INITIALIZER(qemu_option_rom_opts.head),
 539     .desc = {
 540         {
 541             .name = "bootindex",
 542             .type = QEMU_OPT_NUMBER,
 543         }, {
 544             .name = "romfile",
 545             .type = QEMU_OPT_STRING,
 546         },
 547         { /* end of list */ }
 548     },
 549 };
 550
 551 static QemuOptsList qemu_machine_opts = {
 552     .name = "machine",
 553     .implied_opt_name = "type",
 554     .merge_lists = true,
 555     .head = QTAILQ_HEAD_INITIALIZER(qemu_machine_opts.head),
 556     .desc = {
 557         {
 558             .name = "type",
 559             .type = QEMU_OPT_STRING,
 560             .help = "emulated machine"
 561         }, {
 562             .name = "accel",
 563             .type = QEMU_OPT_STRING,
 564             .help = "accelerator list",
 565         }, {
 566             .name = "kernel_irqchip",
 567             .type = QEMU_OPT_BOOL,
 568             .help = "use KVM in-kernel irqchip",
 569         }, {
 570             .name = "kvm_shadow_mem",
 571             .type = QEMU_OPT_SIZE,
 572             .help = "KVM shadow MMU size",
 573         }, {
 574             .name = "kernel",
 575             .type = QEMU_OPT_STRING,
 576             .help = "Linux kernel image file",
 577         }, {
 578             .name = "initrd",
 579             .type = QEMU_OPT_STRING,
 580             .help = "Linux initial ramdisk file",
 581         }, {
 582             .name = "append",
 583             .type = QEMU_OPT_STRING,
 584             .help = "Linux kernel command line",
 585         }, {
 586             .name = "dtb",
 587             .type = QEMU_OPT_STRING,
 588             .help = "Linux kernel device tree file",
 589         },
 590         { /* End of list */ }
 591     },
 592 };
 593
 594 QemuOptsList qemu_boot_opts = {
 595     .name = "boot-opts",
 596     .head = QTAILQ_HEAD_INITIALIZER(qemu_boot_opts.head),
 597     .desc = {
 598         /* the three names below are not used now */
 599         {
 600             .name = "order",
 601             .type = QEMU_OPT_STRING,
 602         }, {
 603             .name = "once",
 604             .type = QEMU_OPT_STRING,
 605         }, {
 606             .name = "menu",
 607             .type = QEMU_OPT_STRING,
 608         /* following are really used */
 609         }, {
 610             .name = "splash",
 611             .type = QEMU_OPT_STRING,
 612         }, {
 613             .name = "splash-time",
 614             .type = QEMU_OPT_STRING,
 615         },
 616         { /*End of list */ }
 617     },
 618 };
 619
 620 static QemuOptsList *vm_config_groups[32] = {
 621     &qemu_drive_opts,
 622     &qemu_chardev_opts,
 623     &qemu_device_opts,
 624     &qemu_netdev_opts,
 625     &qemu_net_opts,
 626     &qemu_rtc_opts,
 627     &qemu_global_opts,
 628     &qemu_mon_opts,
 629     &qemu_cpudef_opts,
 630     &qemu_trace_opts,
 631     &qemu_option_rom_opts,
 632     &qemu_machine_opts,
 633     &qemu_boot_opts,
 634     &qemu_iscsi_opts,
 635     NULL,
 636 };
 637
 638 static QemuOptsList *find_list(QemuOptsList **lists, const char *group)
 639 {
 640     int i;
 641
 642     for (i = 0; lists[i] != NULL; i++) {
 643         if (strcmp(lists[i]->name, group) == 0)
 644             break;
 645     }
 646     if (lists[i] == NULL) {
 647         error_report("there is no option group \"%s\"", group);
 648     }
 649     return lists[i];
 650 }
 651
 652 QemuOptsList *qemu_find_opts(const char *group)
 653 {
 654     return find_list(vm_config_groups, group);
 655 }
 656
 657 void qemu_add_opts(QemuOptsList *list)
 658 {
 659     int entries, i;
 660
 661     entries = ARRAY_SIZE(vm_config_groups);
 662     entries--; /* keep list NULL terminated */
 663     for (i = 0; i < entries; i++) {
 664         if (vm_config_groups[i] == NULL) {
 665             vm_config_groups[i] = list;
 666             return;
 667         }
 668     }
 669     fprintf(stderr, "ran out of space in vm_config_groups");
 670     abort();
 671 }
 672
 673 int qemu_set_option(const char *str)
 674 {
 675     char group[64], id[64], arg[64];
 676     QemuOptsList *list;
 677     QemuOpts *opts;
 678     int rc, offset;
 679
 680     rc = sscanf(str, "%63[^.].%63[^.].%63[^=]%n", group, id, arg, &offset);
 681     if (rc < 3 || str[offset] != '=') {
 682         error_report("can't parse: \"%s\"", str);
 683         return -1;
 684     }
 685
 686     list = qemu_find_opts(group);
 687     if (list == NULL) {
 688         return -1;
 689     }
 690
 691     opts = qemu_opts_find(list, id);
 692     if (!opts) {
 693         error_report("there is no %s \"%s\" defined",
 694                      list->name, id);
 695         return -1;
 696     }
 697
 698     if (qemu_opt_set(opts, arg, str+offset+1) == -1) {
 699         return -1;
 700     }
 701     return 0;
 702 }
 703
 704 int qemu_global_option(const char *str)
 705 {
 706     char driver[64], property[64];
 707     QemuOpts *opts;
 708     int rc, offset;
 709
 710     rc = sscanf(str, "%63[^.].%63[^=]%n", driver, property, &offset);
 711     if (rc < 2 || str[offset] != '=') {
 712         error_report("can't parse: \"%s\"", str);
 713         return -1;
 714     }
 715
 716     opts = qemu_opts_create(&qemu_global_opts, NULL, 0);
 717     qemu_opt_set(opts, "driver", driver);
 718     qemu_opt_set(opts, "property", property);
 719     qemu_opt_set(opts, "value", str+offset+1);
 720     return 0;
 721 }
 722
 723 struct ConfigWriteData {
 724     QemuOptsList *list;
 725     FILE *fp;
 726 };
 727
 728 static int config_write_opt(const char *name, const char *value, void *opaque)
 729 {
 730     struct ConfigWriteData *data = opaque;
 731
 732     fprintf(data->fp, "  %s = \"%s\"\n", name, value);
 733     return 0;
 734 }
 735
 736 static int config_write_opts(QemuOpts *opts, void *opaque)
 737 {
 738     struct ConfigWriteData *data = opaque;
 739     const char *id = qemu_opts_id(opts);
 740
 741     if (id) {
 742         fprintf(data->fp, "[%s \"%s\"]\n", data->list->name, id);
 743     } else {
 744         fprintf(data->fp, "[%s]\n", data->list->name);
 745     }
 746     qemu_opt_foreach(opts, config_write_opt, data, 0);
 747     fprintf(data->fp, "\n");
 748     return 0;
 749 }
 750
 751 void qemu_config_write(FILE *fp)
 752 {
 753     struct ConfigWriteData data = { .fp = fp };
 754     QemuOptsList **lists = vm_config_groups;
 755     int i;
 756
 757     fprintf(fp, "# qemu config file\n\n");
 758     for (i = 0; lists[i] != NULL; i++) {
 759         data.list = lists[i];
 760         qemu_opts_foreach(data.list, config_write_opts, &data, 0);
 761     }
 762 }
 763
 764 int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname)
 765 {
 766     char line[1024], group[64], id[64], arg[64], value[1024];
 767     Location loc;
 768     QemuOptsList *list = NULL;
 769     QemuOpts *opts = NULL;
 770     int res = -1, lno = 0;
 771
 772     loc_push_none(&loc);
 773     while (fgets(line, sizeof(line), fp) != NULL) {
 774         loc_set_file(fname, ++lno);
 775         if (line[0] == '\n') {
 776             /* skip empty lines */
 777             continue;
 778         }
 779         if (line[0] == '#') {
 780             /* comment */
 781             continue;
 782         }
 783         if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) {
 784             /* group with id */
 785             list = find_list(lists, group);
 786             if (list == NULL)
 787                 goto out;
 788             opts = qemu_opts_create(list, id, 1);
 789             continue;
 790         }
 791         if (sscanf(line, "[%63[^]]]", group) == 1) {
 792             /* group without id */
 793             list = find_list(lists, group);
 794             if (list == NULL)
 795                 goto out;
 796             opts = qemu_opts_create(list, NULL, 0);
 797             continue;
 798         }
 799         if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2) {
 800             /* arg = value */
 801             if (opts == NULL) {
 802                 error_report("no group defined");
 803                 goto out;
 804             }
 805             if (qemu_opt_set(opts, arg, value) != 0) {
 806                 goto out;
 807             }
 808             continue;
 809         }
 810         error_report("parse error");
 811         goto out;
 812     }
 813     if (ferror(fp)) {
 814         error_report("error reading file");
 815         goto out;
 816     }
 817     res = 0;
 818 out:
 819     loc_pop(&loc);
 820     return res;
 821 }
 822
 823 int qemu_read_config_file(const char *filename)
 824 {
 825     FILE *f = fopen(filename, "r");
 826     int ret;
 827
 828     if (f == NULL) {
 829         return -errno;
 830     }
 831
 832     ret = qemu_config_parse(f, vm_config_groups, filename);
 833     fclose(f);
 834
 835     if (ret == 0) {
 836         return 0;
 837     } else {
 838         return -EINVAL;
 839     }
 840 }