config.c

   1 /*
   2  * mdadm - manage Linux "md" devices aka RAID arrays.
   3  *
   4  * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de>
   5  *
   6  *
   7  *    This program is free software; you can redistribute it and/or modify
   8  *    it under the terms of the GNU General Public License as published by
   9  *    the Free Software Foundation; either version 2 of the License, or
  10  *    (at your option) any later version.
  11  *
  12  *    This program is distributed in the hope that it will be useful,
  13  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *    GNU General Public License for more details.
  16  *
  17  *    You should have received a copy of the GNU General Public License
  18  *    along with this program; if not, write to the Free Software
  19  *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  *
  21  *    Author: Neil Brown
  22  *    Email: <neilb@cse.unsw.edu.au>
  23  *    Paper: Neil Brown
  24  *           School of Computer Science and Engineering
  25  *           The University of New South Wales
  26  *           Sydney, 2052
  27  *           Australia
  28  */
  29
  30 #include        "mdadm.h"
  31 #include        "dlink.h"
  32 #include        <sys/dir.h>
  33 #include        <glob.h>
  34 #include        <fnmatch.h>
  35 #include        <ctype.h>
  36 #include        <pwd.h>
  37 #include        <grp.h>
  38
  39 /*
  40  * Read the config file
  41  *
  42  * conf_get_uuids gets a list of devicename+uuid pairs
  43  * conf_get_devs gets device names after expanding wildcards
  44  *
  45  * Each keeps the returned list and frees it when asked to make
  46  * a new list.
  47  *
  48  * The format of the config file needs to be fairly extensible.
  49  * Now, arrays only have names and uuids and devices merely are.
  50  * But later arrays might want names, and devices might want superblock
  51  * versions, and who knows what else.
  52  * I like free format, abhore backslash line continuation, adore
  53  *   indentation for structure and am ok about # comments.
  54  *
  55  * So, each line that isn't blank or a #comment must either start
  56  *  with a key word, and not be indented, or must start with a
  57  *  non-key-word and must be indented.
  58  *
  59  * Keywords are DEVICE and ARRAY
  60  * DEV{ICE} introduces some devices that might contain raid components.
  61  * e.g.
  62  *   DEV style=0 /dev/sda* /dev/hd*
  63  *   DEV style=1 /dev/sd[b-f]*
  64  * ARR{AY} describes an array giving md device and attributes like uuid=whatever
  65  * e.g.
  66  *   ARRAY /dev/md0 uuid=whatever name=something
  67  * Spaces separate words on each line.  Quoting, with "" or '' protects them,
  68  * but may not wrap over lines
  69  *
  70  */
  71
  72 #ifndef CONFFILE
  73 #define CONFFILE "/etc/mdadm.conf"
  74 #endif
  75 #ifndef CONFFILE2
  76 /* for Debian compatibility .... */
  77 #define CONFFILE2 "/etc/mdadm/mdadm.conf"
  78 #endif
  79 char DefaultConfFile[] = CONFFILE;
  80 char DefaultAltConfFile[] = CONFFILE2;
  81
  82 enum linetype { Devices, Array, Mailaddr, Mailfrom, Program, CreateDev, Homehost, LTEnd };
  83 char *keywords[] = {
  84         [Devices]  = "devices",
  85         [Array]    = "array",
  86         [Mailaddr] = "mailaddr",
  87         [Mailfrom] = "mailfrom",
  88         [Program]  = "program",
  89         [CreateDev]   = "create",
  90         [Homehost] = "homehost",
  91         [LTEnd]    = NULL
  92 };
  93
  94 /*
  95  * match_keyword returns an index into the keywords array, or -1 for no match
  96  * case is ignored, and at least three characters must be given
  97  */
  98
  99 int match_keyword(char *word)
 100 {
 101         int len = strlen(word);
 102         int n;
 103
 104         if (len < 3) return -1;
 105         for (n=0; keywords[n]; n++) {
 106                 if (strncasecmp(word, keywords[n], len)==0)
 107                         return n;
 108         }
 109         return -1;
 110 }
 111
 112 /* conf_word gets one word from the conf file.
 113  * if "allow_key", then accept words at the start of a line,
 114  * otherwise stop when such a word is found.
 115  * We assume that the file pointer is at the end of a word, so the
 116  * next character is a space, or a newline.  If not, it is the start of a line.
 117  */
 118
 119 char *conf_word(FILE *file, int allow_key)
 120 {
 121         int wsize = 100;
 122         int len = 0;
 123         int c;
 124         int quote;
 125         int wordfound = 0;
 126         char *word = malloc(wsize);
 127
 128         if (!word) abort();
 129
 130         while (wordfound==0) {
 131                 /* at the end of a word.. */
 132                 c = getc(file);
 133                 if (c == '#')
 134                         while (c != EOF && c != '\n')
 135                                 c = getc(file);
 136                 if (c == EOF) break;
 137                 if (c == '\n') continue;
 138
 139                 if (c != ' ' && c != '\t' && ! allow_key) {
 140                         ungetc(c, file);
 141                         break;
 142                 }
 143                 /* looks like it is safe to get a word here, if there is one */
 144                 quote = 0;
 145                 /* first, skip any spaces */
 146                 while (c == ' ' || c == '\t')
 147                         c = getc(file);
 148                 if (c != EOF && c != '\n' && c != '#') {
 149                         /* we really have a character of a word, so start saving it */
 150                         while (c != EOF && c != '\n' && (quote || (c!=' ' && c != '\t'))) {
 151                                 wordfound = 1;
 152                                 if (quote && c == quote) quote = 0;
 153                                 else if (quote == 0 && (c == '\'' || c == '"'))
 154                                         quote = c;
 155                                 else {
 156                                         if (len == wsize-1) {
 157                                                 wsize += 100;
 158                                                 word = realloc(word, wsize);
 159                                                 if (!word) abort();
 160                                         }
 161                                         word[len++] = c;
 162                                 }
 163                                 c = getc(file);
 164                         }
 165                 }
 166                 if (c != EOF) ungetc(c, file);
 167         }
 168         word[len] = 0;
 169 /*    printf("word is <%s>\n", word); */
 170         if (!wordfound) {
 171                 free(word);
 172                 word = NULL;
 173         }
 174         return word;
 175 }
 176
 177 /*
 178  * conf_line reads one logical line from the conffile.
 179  * It skips comments and continues until it finds a line that starts
 180  * with a non blank/comment.  This character is pushed back for the next call
 181  * A doubly linked list of words is returned.
 182  * the first word will be a keyword.  Other words will have had quotes removed.
 183  */
 184
 185 char *conf_line(FILE *file)
 186 {
 187         char *w;
 188         char *list;
 189
 190         w = conf_word(file, 1);
 191         if (w == NULL) return NULL;
 192
 193         list = dl_strdup(w);
 194         free(w);
 195         dl_init(list);
 196
 197         while ((w = conf_word(file,0))){
 198                 char *w2 = dl_strdup(w);
 199                 free(w);
 200                 dl_add(list, w2);
 201         }
 202 /*    printf("got a line\n");*/
 203         return list;
 204 }
 205
 206 void free_line(char *line)
 207 {
 208         char *w;
 209         for (w=dl_next(line); w != line; w=dl_next(line)) {
 210                 dl_del(w);
 211                 dl_free(w);
 212         }
 213         dl_free(line);
 214 }
 215
 216
 217 struct conf_dev {
 218     struct conf_dev *next;
 219     char *name;
 220 } *cdevlist = NULL;
 221
 222 mddev_dev_t load_partitions(void)
 223 {
 224         FILE *f = fopen("/proc/partitions", "r");
 225         char buf[1024];
 226         mddev_dev_t rv = NULL;
 227         if (f == NULL) {
 228                 fprintf(stderr, Name ": cannot open /proc/partitions\n");
 229                 return NULL;
 230         }
 231         while (fgets(buf, 1024, f)) {
 232                 int major, minor;
 233                 char *name, *mp;
 234                 mddev_dev_t d;
 235
 236                 buf[1023] = '\0';
 237                 if (buf[0] != ' ')
 238                         continue;
 239                 major = strtoul(buf, &mp, 10);
 240                 if (mp == buf || *mp != ' ')
 241                         continue;
 242                 minor = strtoul(mp, NULL, 10);
 243
 244                 name = map_dev(major, minor, 1);
 245
 246                 d = malloc(sizeof(*d));
 247                 d->devname = strdup(name);
 248                 d->next = rv;
 249                 d->used = 0;
 250                 rv = d;
 251         }
 252         fclose(f);
 253         return rv;
 254 }
 255
 256 struct createinfo createinfo = {
 257 #ifdef DEBIAN
 258         .gid = 6, /* disk */
 259         .mode = 0660,
 260 #else
 261         .mode = 0600,
 262 #endif
 263 };
 264
 265 int parse_auto(char *str, char *msg, int config)
 266 {
 267         int autof;
 268         if (str == NULL || *str == 0)
 269                 autof = 2;
 270         else if (strcasecmp(str,"no")==0)
 271                 autof = 1;
 272         else if (strcasecmp(str,"yes")==0)
 273                 autof = 2;
 274         else if (strcasecmp(str,"md")==0)
 275                 autof = config?5:3;
 276         else {
 277                 /* There might be digits, and maybe a hypen, at the end */
 278                 char *e = str + strlen(str);
 279                 int num = 4;
 280                 int len;
 281                 while (e > str && isdigit(e[-1]))
 282                         e--;
 283                 if (*e) {
 284                         num = atoi(e);
 285                         if (num <= 0) num = 1;
 286                 }
 287                 if (e > str && e[-1] == '-')
 288                         e--;
 289                 len = e - str;
 290                 if ((len == 2 && strncasecmp(str,"md",2)==0)) {
 291                         autof = config ? 5 : 3;
 292                 } else if ((len == 3 && strncasecmp(str,"mdp",3)==0)) {
 293                         autof = config ? 6 : 4;
 294                 } else if ((len == 1 && strncasecmp(str,"p",1)==0) ||
 295                            (len >= 4 && strncasecmp(str,"part",4)==0)) {
 296                         autof = 6;
 297                 } else {
 298                         fprintf(stderr, Name ": %s arg of \"%s\" unrecognised: use no,yes,md,mdp,part\n"
 299                                 "        optionally followed by a number.\n",
 300                                 msg, str);
 301                         exit(2);
 302                 }
 303                 autof |= num << 3;
 304         }
 305         return autof;
 306 }
 307
 308 static void createline(char *line)
 309 {
 310         char *w;
 311         char *ep;
 312
 313         for (w=dl_next(line); w!=line; w=dl_next(w)) {
 314                 if (strncasecmp(w, "auto=", 5) == 0)
 315                         createinfo.autof = parse_auto(w+5, "auto=", 1);
 316                 else if (strncasecmp(w, "owner=", 6) == 0) {
 317                         if (w[6] == 0) {
 318                                 fprintf(stderr, Name ": missing owner name\n");
 319                                 continue;
 320                         }
 321                         createinfo.uid = strtoul(w+6, &ep, 10);
 322                         if (*ep != 0) {
 323                                 struct passwd *pw;
 324                                 /* must be a name */
 325                                 pw = getpwnam(w+6);
 326                                 if (pw)
 327                                         createinfo.uid = pw->pw_uid;
 328                                 else
 329                                         fprintf(stderr, Name ": CREATE user %s not found\n", w+6);
 330                         }
 331                 } else if (strncasecmp(w, "group=", 6) == 0) {
 332                         if (w[6] == 0) {
 333                                 fprintf(stderr, Name ": missing group name\n");
 334                                 continue;
 335                         }
 336                         createinfo.gid = strtoul(w+6, &ep, 10);
 337                         if (*ep != 0) {
 338                                 struct group *gr;
 339                                 /* must be a name */
 340                                 gr = getgrnam(w+6);
 341                                 if (gr)
 342                                         createinfo.gid = gr->gr_gid;
 343                                 else
 344                                         fprintf(stderr, Name ": CREATE group %s not found\n", w+6);
 345                         }
 346                 } else if (strncasecmp(w, "mode=", 5) == 0) {
 347                         if (w[5] == 0) {
 348                                 fprintf(stderr, Name ": missing CREATE mode\n");
 349                                 continue;
 350                         }
 351                         createinfo.mode = strtoul(w+5, &ep, 8);
 352                         if (*ep != 0) {
 353                                 createinfo.mode = 0600;
 354                                 fprintf(stderr, Name ": unrecognised CREATE mode %s\n",
 355                                         w+5);
 356                         }
 357                 } else {
 358                         fprintf(stderr, Name ": unrecognised word on CREATE line: %s\n",
 359                                 w);
 360                 }
 361         }
 362 }
 363
 364 void devline(char *line)
 365 {
 366         char *w;
 367         struct conf_dev *cd;
 368
 369         for (w=dl_next(line); w != line; w=dl_next(w)) {
 370                 if (w[0] == '/' || strcasecmp(w, "partitions") == 0) {
 371                         cd = malloc(sizeof(*cd));
 372                         cd->name = strdup(w);
 373                         cd->next = cdevlist;
 374                         cdevlist = cd;
 375                 } else {
 376                         fprintf(stderr, Name ": unreconised word on DEVICE line: %s\n",
 377                                 w);
 378                 }
 379         }
 380 }
 381
 382 mddev_ident_t mddevlist = NULL;
 383 mddev_ident_t *mddevlp = &mddevlist;
 384
 385 void arrayline(char *line)
 386 {
 387         char *w;
 388
 389         struct mddev_ident_s mis;
 390         mddev_ident_t mi;
 391
 392         mis.uuid_set = 0;
 393         mis.super_minor = UnSet;
 394         mis.level = UnSet;
 395         mis.raid_disks = UnSet;
 396         mis.spare_disks = 0;
 397         mis.devices = NULL;
 398         mis.devname = NULL;
 399         mis.spare_group = NULL;
 400         mis.autof = 0;
 401         mis.next = NULL;
 402         mis.st = NULL;
 403         mis.bitmap_fd = -1;
 404         mis.bitmap_file = NULL;
 405         mis.name[0] = 0;
 406
 407         for (w=dl_next(line); w!=line; w=dl_next(w)) {
 408                 if (w[0] == '/') {
 409                         if (mis.devname)
 410                                 fprintf(stderr, Name ": only give one device per ARRAY line: %s and %s\n",
 411                                         mis.devname, w);
 412                         else mis.devname = w;
 413                 } else if (strncasecmp(w, "uuid=", 5)==0 ) {
 414                         if (mis.uuid_set)
 415                                 fprintf(stderr, Name ": only specify uuid once, %s ignored.\n",
 416                                         w);
 417                         else {
 418                                 if (parse_uuid(w+5, mis.uuid))
 419                                         mis.uuid_set = 1;
 420                                 else
 421                                         fprintf(stderr, Name ": bad uuid: %s\n", w);
 422                         }
 423                 } else if (strncasecmp(w, "super-minor=", 12)==0 ) {
 424                         if (mis.super_minor != UnSet)
 425                                 fprintf(stderr, Name ": only specify super-minor once, %s ignored.\n",
 426                                         w);
 427                         else {
 428                                 char *endptr;
 429                                 mis.super_minor= strtol(w+12, &endptr, 10);
 430                                 if (w[12]==0 || endptr[0]!=0 || mis.super_minor < 0) {
 431                                         fprintf(stderr, Name ": invalid super-minor number: %s\n",
 432                                                 w);
 433                                         mis.super_minor = UnSet;
 434                                 }
 435                         }
 436                 } else if (strncasecmp(w, "name=", 5)==0) {
 437                         if (mis.name[0])
 438                                 fprintf(stderr, Name ": only specify name once, %s ignored.\n",
 439                                         w);
 440                         else if (strlen(w+5) > 32)
 441                                 fprintf(stderr, Name ": name too long, ignoring %s\n", w);
 442                         else
 443                                 strcpy(mis.name, w+5);
 444
 445                 } else if (strncasecmp(w, "bitmap=", 7) == 0) {
 446                         if (mis.bitmap_file)
 447                                 fprintf(stderr, Name ": only specify bitmap file once. %s ignored\n",
 448                                         w);
 449                         else
 450                                 mis.bitmap_file = w+7;
 451
 452                 } else if (strncasecmp(w, "devices=", 8 ) == 0 ) {
 453                         if (mis.devices)
 454                                 fprintf(stderr, Name ": only specify devices once (use a comma separated list). %s ignored\n",
 455                                         w);
 456                         else
 457                                 mis.devices = strdup(w+8);
 458                 } else if (strncasecmp(w, "spare-group=", 12) == 0 ) {
 459                         if (mis.spare_group)
 460                                 fprintf(stderr, Name ": only specify one spare group per array. %s ignored.\n",
 461                                         w);
 462                         else
 463                                 mis.spare_group = strdup(w+12);
 464                 } else if (strncasecmp(w, "level=", 6) == 0 ) {
 465                         /* this is mainly for compatability with --brief output */
 466                         mis.level = map_name(pers, w+6);
 467                 } else if (strncasecmp(w, "disks=", 6) == 0 ) {
 468                         /* again, for compat */
 469                         mis.raid_disks = atoi(w+6);
 470                 } else if (strncasecmp(w, "num-devices=", 12) == 0 ) {
 471                         /* again, for compat */
 472                         mis.raid_disks = atoi(w+12);
 473                 } else if (strncasecmp(w, "spares=", 7) == 0 ) {
 474                         /* for warning if not all spares present */
 475                         mis.spare_disks = atoi(w+7);
 476                 } else if (strncasecmp(w, "metadata=", 9) == 0) {
 477                         /* style of metadata on the devices. */
 478                         int i;
 479
 480                         for(i=0; superlist[i] && !mis.st; i++)
 481                                 mis.st = superlist[i]->match_metadata_desc(w+9);
 482
 483                         if (!mis.st)
 484                                 fprintf(stderr, Name ": metadata format %s unknown, ignored.\n", w+9);
 485                 } else if (strncasecmp(w, "auto=", 5) == 0 ) {
 486                         /* whether to create device special files as needed */
 487                         mis.autof = parse_auto(w+5, "auto type", 0);
 488                 } else {
 489                         fprintf(stderr, Name ": unrecognised word on ARRAY line: %s\n",
 490                                 w);
 491                 }
 492         }
 493         if (mis.devname == NULL)
 494                 fprintf(stderr, Name ": ARRAY line with no device\n");
 495         else if (mis.uuid_set == 0 && mis.devices == NULL && mis.super_minor == UnSet && mis.name[0] == 0)
 496                 fprintf(stderr, Name ": ARRAY line %s has no identity information.\n", mis.devname);
 497         else {
 498                 mi = malloc(sizeof(*mi));
 499                 *mi = mis;
 500                 mi->devname = strdup(mis.devname);
 501                 mi->next = NULL;
 502                 *mddevlp = mi;
 503                 mddevlp = &mi->next;
 504         }
 505 }
 506
 507 static char *alert_email = NULL;
 508 void mailline(char *line)
 509 {
 510         char *w;
 511
 512         for (w=dl_next(line); w != line ; w=dl_next(w)) {
 513                 if (alert_email == NULL)
 514                         alert_email = strdup(w);
 515                 else
 516                         fprintf(stderr, Name ": excess address on MAIL line: %s - ignored\n",
 517                                 w);
 518         }
 519 }
 520
 521 static char *alert_mail_from = NULL;
 522 void mailfromline(char *line)
 523 {
 524         char *w;
 525
 526         for (w=dl_next(line); w != line ; w=dl_next(w)) {
 527                 if (alert_mail_from == NULL)
 528                         alert_mail_from = strdup(w);
 529                 else {
 530                         char *t= NULL;
 531                         asprintf(&t, "%s %s", alert_mail_from, w);
 532                         free(alert_mail_from);
 533                         alert_mail_from = t;
 534                 }
 535         }
 536 }
 537
 538
 539 static char *alert_program = NULL;
 540 void programline(char *line)
 541 {
 542         char *w;
 543
 544         for (w=dl_next(line); w != line ; w=dl_next(w)) {
 545                 if (alert_program == NULL)
 546                         alert_program = strdup(w);
 547                 else
 548                         fprintf(stderr, Name ": excess program on PROGRAM line: %s - ignored\n",
 549                                 w);
 550         }
 551 }
 552
 553 static char *home_host = NULL;
 554 void homehostline(char *line)
 555 {
 556         char *w;
 557
 558         for (w=dl_next(line); w != line ; w=dl_next(w)) {
 559                 if (home_host == NULL)
 560                         home_host = strdup(w);
 561                 else
 562                         fprintf(stderr, Name ": excess host name on HOMEHOST line: %s - ignored\n",
 563                                 w);
 564         }
 565 }
 566
 567
 568 int loaded = 0;
 569
 570 void load_conffile(char *conffile)
 571 {
 572         FILE *f;
 573         char *line;
 574
 575         if (loaded) return;
 576         if (conffile == NULL)
 577                 conffile = DefaultConfFile;
 578
 579         if (strcmp(conffile, "none") == 0) {
 580                 loaded = 1;
 581                 return;
 582         }
 583         if (strcmp(conffile, "partitions")==0) {
 584                 char *list = dl_strdup("DEV");
 585                 dl_init(list);
 586                 dl_add(list, dl_strdup("partitions"));
 587                 devline(list);
 588                 free_line(list);
 589                 loaded = 1;
 590                 return;
 591         }
 592         f = fopen(conffile, "r");
 593         /* Debian chose to relocate mdadm.conf into /etc/mdadm/.
 594          * To allow Debian users to compile from clean source and still
 595          * have a working mdadm, we read /etc/mdadm/mdadm.conf
 596          * if /etc/mdadm.conf doesn't exist
 597          */
 598         if (f == NULL &&
 599             conffile == DefaultConfFile) {
 600                 f = fopen(DefaultAltConfFile, "r");
 601                 if (f)
 602                         conffile = DefaultAltConfFile;
 603         }
 604         if (f == NULL)
 605                 return;
 606
 607         loaded = 1;
 608         while ((line=conf_line(f))) {
 609                 switch(match_keyword(line)) {
 610                 case Devices:
 611                         devline(line);
 612                         break;
 613                 case Array:
 614                         arrayline(line);
 615                         break;
 616                 case Mailaddr:
 617                         mailline(line);
 618                         break;
 619                 case Mailfrom:
 620                         mailfromline(line);
 621                         break;
 622                 case Program:
 623                         programline(line);
 624                         break;
 625                 case CreateDev:
 626                         createline(line);
 627                         break;
 628                 case Homehost:
 629                         homehostline(line);
 630                         break;
 631                 default:
 632                         fprintf(stderr, Name ": Unknown keyword %s\n", line);
 633                 }
 634                 free_line(line);
 635         }
 636
 637         fclose(f);
 638
 639 /*    printf("got file\n"); */
 640 }
 641
 642 char *conf_get_mailaddr(char *conffile)
 643 {
 644         load_conffile(conffile);
 645         return alert_email;
 646 }
 647
 648 char *conf_get_mailfrom(char *conffile)
 649 {
 650         load_conffile(conffile);
 651         return alert_mail_from;
 652 }
 653
 654 char *conf_get_program(char *conffile)
 655 {
 656         load_conffile(conffile);
 657         return alert_program;
 658 }
 659
 660 char *conf_get_homehost(char *conffile)
 661 {
 662         load_conffile(conffile);
 663         return home_host;
 664 }
 665
 666 struct createinfo *conf_get_create_info(char *conffile)
 667 {
 668         load_conffile(conffile);
 669         return &createinfo;
 670 }
 671
 672 mddev_ident_t conf_get_ident(char *conffile, char *dev)
 673 {
 674         mddev_ident_t rv;
 675         load_conffile(conffile);
 676         rv = mddevlist;
 677         while (dev && rv && strcmp(dev, rv->devname)!=0)
 678                 rv = rv->next;
 679         return rv;
 680 }
 681
 682 mddev_dev_t conf_get_devs(char *conffile)
 683 {
 684         glob_t globbuf;
 685         struct conf_dev *cd;
 686         int flags = 0;
 687         static mddev_dev_t dlist = NULL;
 688         unsigned int i;
 689
 690         while (dlist) {
 691                 mddev_dev_t t = dlist;
 692                 dlist = dlist->next;
 693                 free(t->devname);
 694                 free(t);
 695         }
 696
 697         load_conffile(conffile);
 698
 699         if (cdevlist == NULL)
 700                 /* default to 'partitions */
 701                 dlist = load_partitions();
 702
 703         for (cd=cdevlist; cd; cd=cd->next) {
 704                 if (strcasecmp(cd->name, "partitions")==0 && dlist == NULL)
 705                         dlist = load_partitions();
 706                 else {
 707                         glob(cd->name, flags, NULL, &globbuf);
 708                         flags |= GLOB_APPEND;
 709                 }
 710         }
 711         if (flags & GLOB_APPEND) {
 712                 for (i=0; i<globbuf.gl_pathc; i++) {
 713                         mddev_dev_t t = malloc(sizeof(*t));
 714                         t->devname = strdup(globbuf.gl_pathv[i]);
 715                         t->next = dlist;
 716                         t->used = 0;
 717                         dlist = t;
 718 /*      printf("one dev is %s\n", t->devname);*/
 719                 }
 720                 globfree(&globbuf);
 721         }
 722
 723         return dlist;
 724 }
 725
 726 int match_oneof(char *devices, char *devname)
 727 {
 728     /* check if one of the comma separated patterns in devices
 729      * matches devname
 730      */
 731
 732
 733     while (devices && *devices) {
 734         char patn[1024];
 735         char *p = devices;
 736         devices = strchr(devices, ',');
 737         if (!devices)
 738             devices = p + strlen(p);
 739         if (devices-p < 1024) {
 740                 strncpy(patn, p, devices-p);
 741                 patn[devices-p] = 0;
 742                 if (fnmatch(patn, devname, FNM_PATHNAME)==0)
 743                         return 1;
 744         }
 745         if (*devices == ',')
 746                 devices++;
 747     }
 748     return 0;
 749 }