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