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        <dirent.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 ... and several others.
  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,
  83                 Homehost, AutoMode, LTEnd };
  84 char *keywords[] = {
  85         [Devices]  = "devices",
  86         [Array]    = "array",
  87         [Mailaddr] = "mailaddr",
  88         [Mailfrom] = "mailfrom",
  89         [Program]  = "program",
  90         [CreateDev]= "create",
  91         [Homehost] = "homehost",
  92         [AutoMode] = "auto",
  93         [LTEnd]    = NULL
  94 };
  95
  96 /*
  97  * match_keyword returns an index into the keywords array, or -1 for no match
  98  * case is ignored, and at least three characters must be given
  99  */
 100
 101 int match_keyword(char *word)
 102 {
 103         int len = strlen(word);
 104         int n;
 105
 106         if (len < 3) return -1;
 107         for (n=0; keywords[n]; n++) {
 108                 if (strncasecmp(word, keywords[n], len)==0)
 109                         return n;
 110         }
 111         return -1;
 112 }
 113
 114 /* conf_word gets one word from the conf file.
 115  * if "allow_key", then accept words at the start of a line,
 116  * otherwise stop when such a word is found.
 117  * We assume that the file pointer is at the end of a word, so the
 118  * next character is a space, or a newline.  If not, it is the start of a line.
 119  */
 120
 121 char *conf_word(FILE *file, int allow_key)
 122 {
 123         int wsize = 100;
 124         int len = 0;
 125         int c;
 126         int quote;
 127         int wordfound = 0;
 128         char *word = malloc(wsize);
 129
 130         if (!word) abort();
 131
 132         while (wordfound==0) {
 133                 /* at the end of a word.. */
 134                 c = getc(file);
 135                 if (c == '#')
 136                         while (c != EOF && c != '\n')
 137                                 c = getc(file);
 138                 if (c == EOF) break;
 139                 if (c == '\n') continue;
 140
 141                 if (c != ' ' && c != '\t' && ! allow_key) {
 142                         ungetc(c, file);
 143                         break;
 144                 }
 145                 /* looks like it is safe to get a word here, if there is one */
 146                 quote = 0;
 147                 /* first, skip any spaces */
 148                 while (c == ' ' || c == '\t')
 149                         c = getc(file);
 150                 if (c != EOF && c != '\n' && c != '#') {
 151                         /* we really have a character of a word, so start saving it */
 152                         while (c != EOF && c != '\n' && (quote || (c!=' ' && c != '\t'))) {
 153                                 wordfound = 1;
 154                                 if (quote && c == quote) quote = 0;
 155                                 else if (quote == 0 && (c == '\'' || c == '"'))
 156                                         quote = c;
 157                                 else {
 158                                         if (len == wsize-1) {
 159                                                 wsize += 100;
 160                                                 word = realloc(word, wsize);
 161                                                 if (!word) abort();
 162                                         }
 163                                         word[len++] = c;
 164                                 }
 165                                 c = getc(file);
 166                                 /* Hack for broken kernels (2.6.14-.24) that put
 167                                  *        "active(auto-read-only)"
 168                                  * in /proc/mdstat instead of
 169                                  *        "active (auto-read-only)"
 170                                  */
 171                                 if (c == '(' && len >= 6
 172                                     && strncmp(word+len-6, "active", 6) == 0)
 173                                         c = ' ';
 174                         }
 175                 }
 176                 if (c != EOF) ungetc(c, file);
 177         }
 178         word[len] = 0;
 179
 180         /* Further HACK for broken kernels.. 2.6.14-2.6.24 */
 181         if (strcmp(word, "auto-read-only)") == 0)
 182                 strcpy(word, "(auto-read-only)");
 183
 184 /*    printf("word is <%s>\n", word); */
 185         if (!wordfound) {
 186                 free(word);
 187                 word = NULL;
 188         }
 189         return word;
 190 }
 191
 192 /*
 193  * conf_line reads one logical line from the conffile.
 194  * It skips comments and continues until it finds a line that starts
 195  * with a non blank/comment.  This character is pushed back for the next call
 196  * A doubly linked list of words is returned.
 197  * the first word will be a keyword.  Other words will have had quotes removed.
 198  */
 199
 200 char *conf_line(FILE *file)
 201 {
 202         char *w;
 203         char *list;
 204
 205         w = conf_word(file, 1);
 206         if (w == NULL) return NULL;
 207
 208         list = dl_strdup(w);
 209         free(w);
 210         dl_init(list);
 211
 212         while ((w = conf_word(file,0))){
 213                 char *w2 = dl_strdup(w);
 214                 free(w);
 215                 dl_add(list, w2);
 216         }
 217 /*    printf("got a line\n");*/
 218         return list;
 219 }
 220
 221 void free_line(char *line)
 222 {
 223         char *w;
 224         for (w=dl_next(line); w != line; w=dl_next(line)) {
 225                 dl_del(w);
 226                 dl_free(w);
 227         }
 228         dl_free(line);
 229 }
 230
 231
 232 struct conf_dev {
 233     struct conf_dev *next;
 234     char *name;
 235 } *cdevlist = NULL;
 236
 237 mddev_dev_t load_partitions(void)
 238 {
 239         FILE *f = fopen("/proc/partitions", "r");
 240         char buf[1024];
 241         mddev_dev_t rv = NULL;
 242         if (f == NULL) {
 243                 fprintf(stderr, Name ": cannot open /proc/partitions\n");
 244                 return NULL;
 245         }
 246         while (fgets(buf, 1024, f)) {
 247                 int major, minor;
 248                 char *name, *mp;
 249                 mddev_dev_t d;
 250
 251                 buf[1023] = '\0';
 252                 if (buf[0] != ' ')
 253                         continue;
 254                 major = strtoul(buf, &mp, 10);
 255                 if (mp == buf || *mp != ' ')
 256                         continue;
 257                 minor = strtoul(mp, NULL, 10);
 258
 259                 name = map_dev(major, minor, 1);
 260                 if (!name)
 261                         continue;
 262                 d = malloc(sizeof(*d));
 263                 d->devname = strdup(name);
 264                 d->next = rv;
 265                 d->used = 0;
 266                 d->content = NULL;
 267                 rv = d;
 268         }
 269         fclose(f);
 270         return rv;
 271 }
 272
 273 mddev_dev_t load_containers(void)
 274 {
 275         struct mdstat_ent *mdstat = mdstat_read(1, 0);
 276         struct mdstat_ent *ent;
 277         mddev_dev_t d;
 278         mddev_dev_t rv = NULL;
 279
 280         if (!mdstat)
 281                 return NULL;
 282
 283         for (ent = mdstat; ent; ent = ent->next)
 284                 if (ent->metadata_version &&
 285                     strncmp(ent->metadata_version, "external:", 9) == 0 &&
 286                     !is_subarray(&ent->metadata_version[9])) {
 287                         d = malloc(sizeof(*d));
 288                         if (!d)
 289                                 continue;
 290                         if (asprintf(&d->devname, "/dev/%s", ent->dev) < 0) {
 291                                 free(d);
 292                                 continue;
 293                         }
 294                         d->next = rv;
 295                         d->used = 0;
 296                         d->content = NULL;
 297                         rv = d;
 298                 }
 299         free_mdstat(mdstat);
 300
 301         return rv;
 302 }
 303
 304 struct createinfo createinfo = {
 305         .autof = 2, /* by default, create devices with standard names */
 306         .symlinks = 1,
 307 #ifdef DEBIAN
 308         .gid = 6, /* disk */
 309         .mode = 0660,
 310 #else
 311         .mode = 0600,
 312 #endif
 313 };
 314
 315 int parse_auto(char *str, char *msg, int config)
 316 {
 317         int autof;
 318         if (str == NULL || *str == 0)
 319                 autof = 2;
 320         else if (strcasecmp(str,"no")==0)
 321                 autof = 1;
 322         else if (strcasecmp(str,"yes")==0)
 323                 autof = 2;
 324         else if (strcasecmp(str,"md")==0)
 325                 autof = config?5:3;
 326         else {
 327                 /* There might be digits, and maybe a hypen, at the end */
 328                 char *e = str + strlen(str);
 329                 int num = 4;
 330                 int len;
 331                 while (e > str && isdigit(e[-1]))
 332                         e--;
 333                 if (*e) {
 334                         num = atoi(e);
 335                         if (num <= 0) num = 1;
 336                 }
 337                 if (e > str && e[-1] == '-')
 338                         e--;
 339                 len = e - str;
 340                 if ((len == 2 && strncasecmp(str,"md",2)==0)) {
 341                         autof = config ? 5 : 3;
 342                 } else if ((len == 3 && strncasecmp(str,"yes",3)==0)) {
 343                         autof = 2;
 344                 } else if ((len == 3 && strncasecmp(str,"mdp",3)==0)) {
 345                         autof = config ? 6 : 4;
 346                 } else if ((len == 1 && strncasecmp(str,"p",1)==0) ||
 347                            (len >= 4 && strncasecmp(str,"part",4)==0)) {
 348                         autof = 6;
 349                 } else {
 350                         fprintf(stderr, Name ": %s arg of \"%s\" unrecognised: use no,yes,md,mdp,part\n"
 351                                 "        optionally followed by a number.\n",
 352                                 msg, str);
 353                         exit(2);
 354                 }
 355                 autof |= num << 3;
 356         }
 357         return autof;
 358 }
 359
 360 static void createline(char *line)
 361 {
 362         char *w;
 363         char *ep;
 364
 365         for (w=dl_next(line); w!=line; w=dl_next(w)) {
 366                 if (strncasecmp(w, "auto=", 5) == 0)
 367                         createinfo.autof = parse_auto(w+5, "auto=", 1);
 368                 else if (strncasecmp(w, "owner=", 6) == 0) {
 369                         if (w[6] == 0) {
 370                                 fprintf(stderr, Name ": missing owner name\n");
 371                                 continue;
 372                         }
 373                         createinfo.uid = strtoul(w+6, &ep, 10);
 374                         if (*ep != 0) {
 375                                 struct passwd *pw;
 376                                 /* must be a name */
 377                                 pw = getpwnam(w+6);
 378                                 if (pw)
 379                                         createinfo.uid = pw->pw_uid;
 380                                 else
 381                                         fprintf(stderr, Name ": CREATE user %s not found\n", w+6);
 382                         }
 383                 } else if (strncasecmp(w, "group=", 6) == 0) {
 384                         if (w[6] == 0) {
 385                                 fprintf(stderr, Name ": missing group name\n");
 386                                 continue;
 387                         }
 388                         createinfo.gid = strtoul(w+6, &ep, 10);
 389                         if (*ep != 0) {
 390                                 struct group *gr;
 391                                 /* must be a name */
 392                                 gr = getgrnam(w+6);
 393                                 if (gr)
 394                                         createinfo.gid = gr->gr_gid;
 395                                 else
 396                                         fprintf(stderr, Name ": CREATE group %s not found\n", w+6);
 397                         }
 398                 } else if (strncasecmp(w, "mode=", 5) == 0) {
 399                         if (w[5] == 0) {
 400                                 fprintf(stderr, Name ": missing CREATE mode\n");
 401                                 continue;
 402                         }
 403                         createinfo.mode = strtoul(w+5, &ep, 8);
 404                         if (*ep != 0) {
 405                                 createinfo.mode = 0600;
 406                                 fprintf(stderr, Name ": unrecognised CREATE mode %s\n",
 407                                         w+5);
 408                         }
 409                 } else if (strncasecmp(w, "metadata=", 9) == 0) {
 410                         /* style of metadata to use by default */
 411                         int i;
 412                         for (i=0; superlist[i] && !createinfo.supertype; i++)
 413                                 createinfo.supertype =
 414                                         superlist[i]->match_metadata_desc(w+9);
 415                         if (!createinfo.supertype)
 416                                 fprintf(stderr, Name ": metadata format %s unknown, ignoring\n",
 417                                         w+9);
 418                 } else if (strncasecmp(w, "symlinks=yes", 12) == 0)
 419                         createinfo.symlinks = 1;
 420                 else if  (strncasecmp(w, "symlinks=no", 11) == 0)
 421                         createinfo.symlinks = 0;
 422                 else {
 423                         fprintf(stderr, Name ": unrecognised word on CREATE line: %s\n",
 424                                 w);
 425                 }
 426         }
 427 }
 428
 429 void devline(char *line)
 430 {
 431         char *w;
 432         struct conf_dev *cd;
 433
 434         for (w=dl_next(line); w != line; w=dl_next(w)) {
 435                 if (w[0] == '/' || strcasecmp(w, "partitions") == 0 ||
 436                     strcasecmp(w, "containers") == 0) {
 437                         cd = malloc(sizeof(*cd));
 438                         cd->name = strdup(w);
 439                         cd->next = cdevlist;
 440                         cdevlist = cd;
 441                 } else {
 442                         fprintf(stderr, Name ": unreconised word on DEVICE line: %s\n",
 443                                 w);
 444                 }
 445         }
 446 }
 447
 448 mddev_ident_t mddevlist = NULL;
 449 mddev_ident_t *mddevlp = &mddevlist;
 450
 451 void arrayline(char *line)
 452 {
 453         char *w;
 454
 455         struct mddev_ident_s mis;
 456         mddev_ident_t mi;
 457
 458         mis.uuid_set = 0;
 459         mis.super_minor = UnSet;
 460         mis.level = UnSet;
 461         mis.raid_disks = UnSet;
 462         mis.spare_disks = 0;
 463         mis.devices = NULL;
 464         mis.devname = NULL;
 465         mis.spare_group = NULL;
 466         mis.autof = 0;
 467         mis.next = NULL;
 468         mis.st = NULL;
 469         mis.bitmap_fd = -1;
 470         mis.bitmap_file = NULL;
 471         mis.name[0] = 0;
 472         mis.container = NULL;
 473         mis.member = NULL;
 474
 475         for (w=dl_next(line); w!=line; w=dl_next(w)) {
 476                 if (w[0] == '/' || strcasecmp(w, "<ignore>") == 0) {
 477                         if (mis.devname)
 478                                 fprintf(stderr, Name ": only give one device per ARRAY line: %s and %s\n",
 479                                         mis.devname, w);
 480                         else mis.devname = w;
 481                 } else if (strncasecmp(w, "uuid=", 5)==0 ) {
 482                         if (mis.uuid_set)
 483                                 fprintf(stderr, Name ": only specify uuid once, %s ignored.\n",
 484                                         w);
 485                         else {
 486                                 if (parse_uuid(w+5, mis.uuid))
 487                                         mis.uuid_set = 1;
 488                                 else
 489                                         fprintf(stderr, Name ": bad uuid: %s\n", w);
 490                         }
 491                 } else if (strncasecmp(w, "super-minor=", 12)==0 ) {
 492                         if (mis.super_minor != UnSet)
 493                                 fprintf(stderr, Name ": only specify super-minor once, %s ignored.\n",
 494                                         w);
 495                         else {
 496                                 char *endptr;
 497                                 mis.super_minor= strtol(w+12, &endptr, 10);
 498                                 if (w[12]==0 || endptr[0]!=0 || mis.super_minor < 0) {
 499                                         fprintf(stderr, Name ": invalid super-minor number: %s\n",
 500                                                 w);
 501                                         mis.super_minor = UnSet;
 502                                 }
 503                         }
 504                 } else if (strncasecmp(w, "name=", 5)==0) {
 505                         if (mis.name[0])
 506                                 fprintf(stderr, Name ": only specify name once, %s ignored.\n",
 507                                         w);
 508                         else if (strlen(w+5) > 32)
 509                                 fprintf(stderr, Name ": name too long, ignoring %s\n", w);
 510                         else
 511                                 strcpy(mis.name, w+5);
 512
 513                 } else if (strncasecmp(w, "bitmap=", 7) == 0) {
 514                         if (mis.bitmap_file)
 515                                 fprintf(stderr, Name ": only specify bitmap file once. %s ignored\n",
 516                                         w);
 517                         else
 518                                 mis.bitmap_file = strdup(w+7);
 519
 520                 } else if (strncasecmp(w, "devices=", 8 ) == 0 ) {
 521                         if (mis.devices)
 522                                 fprintf(stderr, Name ": only specify devices once (use a comma separated list). %s ignored\n",
 523                                         w);
 524                         else
 525                                 mis.devices = strdup(w+8);
 526                 } else if (strncasecmp(w, "spare-group=", 12) == 0 ) {
 527                         if (mis.spare_group)
 528                                 fprintf(stderr, Name ": only specify one spare group per array. %s ignored.\n",
 529                                         w);
 530                         else
 531                                 mis.spare_group = strdup(w+12);
 532                 } else if (strncasecmp(w, "level=", 6) == 0 ) {
 533                         /* this is mainly for compatability with --brief output */
 534                         mis.level = map_name(pers, w+6);
 535                 } else if (strncasecmp(w, "disks=", 6) == 0 ) {
 536                         /* again, for compat */
 537                         mis.raid_disks = atoi(w+6);
 538                 } else if (strncasecmp(w, "num-devices=", 12) == 0 ) {
 539                         /* again, for compat */
 540                         mis.raid_disks = atoi(w+12);
 541                 } else if (strncasecmp(w, "spares=", 7) == 0 ) {
 542                         /* for warning if not all spares present */
 543                         mis.spare_disks = atoi(w+7);
 544                 } else if (strncasecmp(w, "metadata=", 9) == 0) {
 545                         /* style of metadata on the devices. */
 546                         int i;
 547
 548                         for(i=0; superlist[i] && !mis.st; i++)
 549                                 mis.st = superlist[i]->match_metadata_desc(w+9);
 550
 551                         if (!mis.st)
 552                                 fprintf(stderr, Name ": metadata format %s unknown, ignored.\n", w+9);
 553                 } else if (strncasecmp(w, "auto=", 5) == 0 ) {
 554                         /* whether to create device special files as needed */
 555                         mis.autof = parse_auto(w+5, "auto type", 0);
 556                 } else if (strncasecmp(w, "member=", 7) == 0) {
 557                         /* subarray within a container */
 558                         mis.member = strdup(w+7);
 559                 } else if (strncasecmp(w, "container=", 10) == 0) {
 560                         /* the container holding this subarray.  Either a device name
 561                          * or a uuid */
 562                         mis.container = strdup(w+10);
 563                 } else {
 564                         fprintf(stderr, Name ": unrecognised word on ARRAY line: %s\n",
 565                                 w);
 566                 }
 567         }
 568         if (mis.uuid_set == 0 && mis.devices == NULL &&
 569             mis.super_minor == UnSet && mis.name[0] == 0 &&
 570             (mis.container == NULL && mis.member == NULL))
 571                 fprintf(stderr, Name ": ARRAY line %s has no identity information.\n", mis.devname);
 572         else {
 573                 mi = malloc(sizeof(*mi));
 574                 *mi = mis;
 575                 mi->devname = mis.devname ? strdup(mis.devname) : NULL;
 576                 mi->next = NULL;
 577                 *mddevlp = mi;
 578                 mddevlp = &mi->next;
 579         }
 580 }
 581
 582 static char *alert_email = NULL;
 583 void mailline(char *line)
 584 {
 585         char *w;
 586
 587         for (w=dl_next(line); w != line ; w=dl_next(w)) {
 588                 if (alert_email == NULL)
 589                         alert_email = strdup(w);
 590                 else
 591                         fprintf(stderr, Name ": excess address on MAIL line: %s - ignored\n",
 592                                 w);
 593         }
 594 }
 595
 596 static char *alert_mail_from = NULL;
 597 void mailfromline(char *line)
 598 {
 599         char *w;
 600
 601         for (w=dl_next(line); w != line ; w=dl_next(w)) {
 602                 if (alert_mail_from == NULL)
 603                         alert_mail_from = strdup(w);
 604                 else {
 605                         char *t = NULL;
 606
 607                         if (xasprintf(&t, "%s %s", alert_mail_from, w) > 0) {
 608                                 free(alert_mail_from);
 609                                 alert_mail_from = t;
 610                         }
 611                 }
 612         }
 613 }
 614
 615
 616 static char *alert_program = NULL;
 617 void programline(char *line)
 618 {
 619         char *w;
 620
 621         for (w=dl_next(line); w != line ; w=dl_next(w)) {
 622                 if (alert_program == NULL)
 623                         alert_program = strdup(w);
 624                 else
 625                         fprintf(stderr, Name ": excess program on PROGRAM line: %s - ignored\n",
 626                                 w);
 627         }
 628 }
 629
 630 static char *home_host = NULL;
 631 void homehostline(char *line)
 632 {
 633         char *w;
 634
 635         for (w=dl_next(line); w != line ; w=dl_next(w)) {
 636                 if (home_host == NULL)
 637                         home_host = strdup(w);
 638                 else
 639                         fprintf(stderr, Name ": excess host name on HOMEHOST line: %s - ignored\n",
 640                                 w);
 641         }
 642 }
 643
 644 static char *auto_options = NULL;
 645 void autoline(char *line)
 646 {
 647         if (auto_options) {
 648                 fprintf(stderr, Name ": AUTO line may only be give once."
 649                         "  Subsequent lines ignored\n");
 650                 return;
 651         }
 652         auto_options = line;
 653 }
 654
 655 int loaded = 0;
 656
 657 static char *conffile = NULL;
 658 void set_conffile(char *file)
 659 {
 660         conffile = file;
 661 }
 662
 663 void load_conffile(void)
 664 {
 665         FILE *f;
 666         char *line;
 667
 668         if (loaded) return;
 669         if (conffile == NULL)
 670                 conffile = DefaultConfFile;
 671
 672         if (strcmp(conffile, "none") == 0) {
 673                 loaded = 1;
 674                 return;
 675         }
 676         if (strcmp(conffile, "partitions")==0) {
 677                 char *list = dl_strdup("DEV");
 678                 dl_init(list);
 679                 dl_add(list, dl_strdup("partitions"));
 680                 devline(list);
 681                 free_line(list);
 682                 loaded = 1;
 683                 return;
 684         }
 685         f = fopen(conffile, "r");
 686         /* Debian chose to relocate mdadm.conf into /etc/mdadm/.
 687          * To allow Debian users to compile from clean source and still
 688          * have a working mdadm, we read /etc/mdadm/mdadm.conf
 689          * if /etc/mdadm.conf doesn't exist
 690          */
 691         if (f == NULL &&
 692             conffile == DefaultConfFile) {
 693                 f = fopen(DefaultAltConfFile, "r");
 694                 if (f)
 695                         conffile = DefaultAltConfFile;
 696         }
 697         if (f == NULL)
 698                 return;
 699
 700         loaded = 1;
 701         while ((line=conf_line(f))) {
 702                 switch(match_keyword(line)) {
 703                 case Devices:
 704                         devline(line);
 705                         break;
 706                 case Array:
 707                         arrayline(line);
 708                         break;
 709                 case Mailaddr:
 710                         mailline(line);
 711                         break;
 712                 case Mailfrom:
 713                         mailfromline(line);
 714                         break;
 715                 case Program:
 716                         programline(line);
 717                         break;
 718                 case CreateDev:
 719                         createline(line);
 720                         break;
 721                 case Homehost:
 722                         homehostline(line);
 723                         break;
 724                 case AutoMode:
 725                         autoline(line);
 726                         break;
 727                 default:
 728                         fprintf(stderr, Name ": Unknown keyword %s\n", line);
 729                 }
 730                 free_line(line);
 731         }
 732
 733         fclose(f);
 734
 735 /*    printf("got file\n"); */
 736 }
 737
 738 char *conf_get_mailaddr(void)
 739 {
 740         load_conffile();
 741         return alert_email;
 742 }
 743
 744 char *conf_get_mailfrom(void)
 745 {
 746         load_conffile();
 747         return alert_mail_from;
 748 }
 749
 750 char *conf_get_program(void)
 751 {
 752         load_conffile();
 753         return alert_program;
 754 }
 755
 756 char *conf_get_homehost(void)
 757 {
 758         load_conffile();
 759         return home_host;
 760 }
 761
 762 struct createinfo *conf_get_create_info(void)
 763 {
 764         load_conffile();
 765         return &createinfo;
 766 }
 767
 768 mddev_ident_t conf_get_ident(char *dev)
 769 {
 770         mddev_ident_t rv;
 771         load_conffile();
 772         rv = mddevlist;
 773         while (dev && rv && (rv->devname == NULL
 774                              || strcmp(dev, rv->devname)!=0))
 775                 rv = rv->next;
 776         return rv;
 777 }
 778
 779 static void append_dlist(mddev_dev_t *dlp, mddev_dev_t list)
 780 {
 781         while (*dlp)
 782                 dlp = &(*dlp)->next;
 783         *dlp = list;
 784 }
 785
 786 mddev_dev_t conf_get_devs()
 787 {
 788         glob_t globbuf;
 789         struct conf_dev *cd;
 790         int flags = 0;
 791         static mddev_dev_t dlist = NULL;
 792         unsigned int i;
 793
 794         while (dlist) {
 795                 mddev_dev_t t = dlist;
 796                 dlist = dlist->next;
 797                 free(t->devname);
 798                 free(t);
 799         }
 800
 801         load_conffile();
 802
 803         if (cdevlist == NULL) {
 804                 /* default to 'partitions' and 'containers' */
 805                 dlist = load_partitions();
 806                 append_dlist(&dlist, load_containers());
 807         }
 808
 809         for (cd=cdevlist; cd; cd=cd->next) {
 810                 if (strcasecmp(cd->name, "partitions")==0)
 811                         append_dlist(&dlist, load_partitions());
 812                 else if (strcasecmp(cd->name, "containers")==0)
 813                         append_dlist(&dlist, load_containers());
 814                 else {
 815                         glob(cd->name, flags, NULL, &globbuf);
 816                         flags |= GLOB_APPEND;
 817                 }
 818         }
 819         if (flags & GLOB_APPEND) {
 820                 for (i=0; i<globbuf.gl_pathc; i++) {
 821                         mddev_dev_t t = malloc(sizeof(*t));
 822                         t->devname = strdup(globbuf.gl_pathv[i]);
 823                         t->next = dlist;
 824                         t->used = 0;
 825                         t->content = NULL;
 826                         dlist = t;
 827 /*      printf("one dev is %s\n", t->devname);*/
 828                 }
 829                 globfree(&globbuf);
 830         }
 831
 832         return dlist;
 833 }
 834
 835 int conf_test_dev(char *devname)
 836 {
 837         struct conf_dev *cd;
 838         if (cdevlist == NULL)
 839                 /* allow anything by default */
 840                 return 1;
 841         for (cd = cdevlist ; cd ; cd = cd->next) {
 842                 if (strcasecmp(cd->name, "partitions") == 0)
 843                         return 1;
 844                 if (fnmatch(cd->name, devname, FNM_PATHNAME) == 0)
 845                         return 1;
 846         }
 847         return 0;
 848 }
 849
 850 int conf_test_metadata(const char *version)
 851 {
 852         /* Check if the given metadata version is allowed
 853          * to be auto-assembled.
 854          * The default is 'yes' but the 'auto' line might over-ride that.
 855          * Word in auto_options are processed in order with the first
 856          * match winning.
 857          * word can be:
 858          *   +version   - that version can be assembled
 859          *   -version   - that version cannot be auto-assembled
 860          *   yes or +all - any other version can be assembled
 861          *   no or -all  - no other version can be assembled.
 862          */
 863         char *w;
 864         load_conffile();
 865         if (!auto_options)
 866                 return 1;
 867         for (w = dl_next(auto_options); w != auto_options; w = dl_next(w)) {
 868                 int rv;
 869                 if (strcasecmp(w, "yes") == 0)
 870                         return 1;
 871                 if (strcasecmp(w, "no") == 0)
 872                         return 0;
 873                 if (w[0] == '+')
 874                         rv = 1;
 875                 else if (w[0] == '-')
 876                         rv = 0;
 877                 else continue;
 878
 879                 if (strcasecmp(w+1, "all") == 0)
 880                         return rv;
 881                 if (strcasecmp(w+1, version) == 0)
 882                         return rv;
 883                 /* allow  '0' to match version '0.90'
 884                  * and 1 or 1.whatever to match version '1.x'
 885                  */
 886                 if (version[1] == '.' &&
 887                     strlen(w+1) == 1 &&
 888                     w[1] == version[0])
 889                         return rv;
 890                 if (version[1] == '.' && version[2] == 'x' &&
 891                     strncmp(w+1, version, 2) == 0)
 892                         return rv;
 893         }
 894         return 1;
 895 }
 896
 897 int match_oneof(char *devices, char *devname)
 898 {
 899     /* check if one of the comma separated patterns in devices
 900      * matches devname
 901      */
 902
 903
 904     while (devices && *devices) {
 905         char patn[1024];
 906         char *p = devices;
 907         devices = strchr(devices, ',');
 908         if (!devices)
 909             devices = p + strlen(p);
 910         if (devices-p < 1024) {
 911                 strncpy(patn, p, devices-p);
 912                 patn[devices-p] = 0;
 913                 if (fnmatch(patn, devname, FNM_PATHNAME)==0)
 914                         return 1;
 915         }
 916         if (*devices == ',')
 917                 devices++;
 918     }
 919     return 0;
 920 }