modprobe.c

   1 /* modprobe.c: add or remove a module from the kernel, intelligently.
   2     Copyright (C) 2001  Rusty Russell.
   3     Copyright (C) 2002, 2003  Rusty Russell, IBM Corporation.
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18 */
  19 #define _GNU_SOURCE /* asprintf */
  20
  21 #include <sys/utsname.h>
  22 #include <sys/types.h>
  23 #include <sys/stat.h>
  24 #include <sys/mman.h>
  25 #include <fcntl.h>
  26 #include <stdarg.h>
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <ctype.h>
  30 #include <string.h>
  31 #include <errno.h>
  32 #include <unistd.h>
  33 #include <dirent.h>
  34 #include <limits.h>
  35 #include <elf.h>
  36 #include <getopt.h>
  37 #include <fnmatch.h>
  38 #include <asm/unistd.h>
  39 #include <sys/wait.h>
  40 #include <syslog.h>
  41
  42 #define streq(a,b) (strcmp((a),(b)) == 0)
  43 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
  44
  45 #include "zlibsupport.h"
  46 #include "logging.h"
  47 #include "index.h"
  48 #include "list.h"
  49 #include "config_filter.h"
  50
  51 #include "testing.h"
  52
  53 int use_binary_indexes = 1; /* default to enabled. */
  54
  55 extern long init_module(void *, unsigned long, const char *);
  56 extern long delete_module(const char *, unsigned int);
  57
  58 struct module {
  59         struct list_head list;
  60         char *modname;
  61         char filename[0];
  62 };
  63
  64 #ifndef MODULE_DIR
  65 #define MODULE_DIR "/lib/modules"
  66 #endif
  67
  68 typedef void (*errfn_t)(const char *fmt, ...);
  69
  70 static void grammar(const char *cmd, const char *filename, unsigned int line)
  71 {
  72         warn("%s line %u: ignoring bad line starting with '%s'\n",
  73              filename, line, cmd);
  74 }
  75
  76 static void print_usage(const char *progname)
  77 {
  78         fprintf(stderr,
  79                 "Usage: %s [-v] [-V] [-C config-file] [-d <dirname> ] [-n] [-i] [-q] [-b] [-o <modname>] [ --dump-modversions ] <modname> [parameters...]\n"
  80                 "%s -r [-n] [-i] [-v] <modulename> ...\n"
  81                 "%s -l -t <dirname> [ -a <modulename> ...]\n",
  82                 progname, progname, progname);
  83         exit(1);
  84 }
  85
  86 static char *getline_wrapped(FILE *file, unsigned int *linenum)
  87 {
  88         int size = 256;
  89         int i = 0;
  90         char *buf = NOFAIL(malloc(size));
  91         for(;;) {
  92                 int ch = getc_unlocked(file);
  93
  94                 switch(ch) {
  95                 case EOF:
  96                         if (i == 0) {
  97                                 free(buf);
  98                                 return NULL;
  99                         }
 100                         /* else fall through */
 101
 102                 case '\n':
 103                         if (linenum)
 104                                 (*linenum)++;
 105                         if (i == size)
 106                                 buf = NOFAIL(realloc(buf, size + 1));
 107                         buf[i] = '\0';
 108                         return buf;
 109
 110                 case '\\':
 111                         ch = getc_unlocked(file);
 112
 113                         if (ch == '\n') {
 114                                 if (linenum)
 115                                         (*linenum)++;
 116                                 continue;
 117                         }
 118                         /* else fall through */
 119
 120                 default:
 121                         buf[i++] = ch;
 122
 123                         if (i == size) {
 124                                 size *= 2;
 125                                 buf = NOFAIL(realloc(buf, size));
 126                         }
 127                 }
 128         }
 129 }
 130
 131 static struct module *find_module(const char *filename, struct list_head *list)
 132 {
 133         struct module *i;
 134
 135         list_for_each_entry(i, list, list) {
 136                 if (strcmp(i->filename, filename) == 0)
 137                         return i;
 138         }
 139         return NULL;
 140 }
 141
 142 /* Convert filename to the module name.  Works if filename == modname, too. */
 143 static void filename2modname(char *modname, const char *filename)
 144 {
 145         const char *afterslash;
 146         unsigned int i;
 147
 148         afterslash = strrchr(filename, '/');
 149         if (!afterslash)
 150                 afterslash = filename;
 151         else
 152                 afterslash++;
 153
 154         /* Convert to underscores, stop at first . */
 155         for (i = 0; afterslash[i] && afterslash[i] != '.'; i++) {
 156                 if (afterslash[i] == '-')
 157                         modname[i] = '_';
 158                 else
 159                         modname[i] = afterslash[i];
 160         }
 161         modname[i] = '\0';
 162 }
 163
 164 static int lock_file(const char *filename)
 165 {
 166         int fd = open(filename, O_RDWR, 0);
 167
 168         if (fd >= 0) {
 169                 struct flock lock;
 170                 lock.l_type = F_WRLCK;
 171                 lock.l_whence = SEEK_SET;
 172                 lock.l_start = 0;
 173                 lock.l_len = 1;
 174                 fcntl(fd, F_SETLKW, &lock);
 175         } else
 176                 /* Read-only filesystem?  There goes locking... */
 177                 fd = open(filename, O_RDONLY, 0);
 178         return fd;
 179 }
 180
 181 static void unlock_file(int fd)
 182 {
 183         /* Valgrind is picky... */
 184         close(fd);
 185 }
 186
 187 static void add_module(char *filename, int namelen, struct list_head *list)
 188 {
 189         struct module *mod;
 190
 191         /* If it's a duplicate: move it to the end, so it gets
 192            inserted where it is *first* required. */
 193         mod = find_module(filename, list);
 194         if (mod)
 195                 list_del(&mod->list);
 196         else {
 197                 /* No match.  Create a new module. */
 198                 mod = NOFAIL(malloc(sizeof(struct module) + namelen + 1));
 199                 memcpy(mod->filename, filename, namelen);
 200                 mod->filename[namelen] = '\0';
 201                 mod->modname = NOFAIL(malloc(namelen + 1));
 202                 filename2modname(mod->modname, mod->filename);
 203         }
 204
 205         list_add_tail(&mod->list, list);
 206 }
 207
 208 /* Compare len chars of a to b, with _ and - equivalent. */
 209 static int modname_equal(const char *a, const char *b, unsigned int len)
 210 {
 211         unsigned int i;
 212
 213         if (strlen(b) != len)
 214                 return 0;
 215
 216         for (i = 0; i < len; i++) {
 217                 if ((a[i] == '_' || a[i] == '-')
 218                     && (b[i] == '_' || b[i] == '-'))
 219                         continue;
 220                 if (a[i] != b[i])
 221                         return 0;
 222         }
 223         return 1;
 224 }
 225
 226 /* Fills in list of modules if this is the line we want. */
 227 static int add_modules_dep_line(char *line,
 228                                 const char *name,
 229                                 struct list_head *list,
 230                                 const char *dirname)
 231 {
 232         char *ptr;
 233         int len;
 234         char *modname, *fullpath;
 235
 236         /* Ignore lines without : or which start with a # */
 237         ptr = strchr(line, ':');
 238         if (ptr == NULL || line[strspn(line, "\t ")] == '#')
 239                 return 0;
 240
 241         /* Is this the module we are looking for? */
 242         *ptr = '\0';
 243         if (strrchr(line, '/'))
 244                 modname = strrchr(line, '/') + 1;
 245         else
 246                 modname = line;
 247
 248         len = strlen(modname);
 249         if (strchr(modname, '.'))
 250                 len = strchr(modname, '.') - modname;
 251         if (!modname_equal(modname, name, len))
 252                 return 0;
 253
 254         /* Create the list. */
 255         if ('/' == line[0]) {   /* old style deps - absolute path specified */
 256                 add_module(line, ptr - line, list);
 257         } else {
 258                 nofail_asprintf(&fullpath, "%s/%s", dirname, line);
 259                 add_module(fullpath, strlen(dirname)+1+(ptr - line), list);
 260                 free(fullpath);
 261         }
 262
 263         ptr++;
 264         for(;;) {
 265                 char *dep_start;
 266                 ptr += strspn(ptr, " \t");
 267                 if (*ptr == '\0')
 268                         break;
 269                 dep_start = ptr;
 270                 ptr += strcspn(ptr, " \t");
 271                 if ('/' == dep_start[0]) {      /* old style deps */
 272                         add_module(dep_start, ptr - dep_start, list);
 273                 } else {
 274                         nofail_asprintf(&fullpath, "%s/%s", dirname, dep_start);
 275                         add_module(fullpath,
 276                                    strlen(dirname)+1+(ptr - dep_start), list);
 277                         free(fullpath);
 278                 }
 279         }
 280         return 1;
 281 }
 282
 283 static int read_depends_bin(const char *dirname,
 284                          const char *start_name,
 285                          struct list_head *list)
 286 {
 287         char *modules_dep_name;
 288         char *line;
 289         FILE *modules_dep;
 290
 291         nofail_asprintf(&modules_dep_name, "%s/%s", dirname, "modules.dep.bin");
 292         modules_dep = fopen(modules_dep_name, "r");
 293         if (!modules_dep) {
 294                 free(modules_dep_name);
 295                 return 0;
 296         }
 297
 298         line = index_search(modules_dep, start_name);
 299         if (line) {
 300                 /* Value is standard dependency line format */
 301                 if (!add_modules_dep_line(line, start_name, list, dirname))
 302                         fatal("Module index is inconsistent\n");
 303                 free(line);
 304         }
 305
 306         fclose(modules_dep);
 307         free(modules_dep_name);
 308
 309         return 1;
 310 }
 311
 312 static void read_depends(const char *dirname,
 313                          const char *start_name,
 314                          struct list_head *list)
 315 {
 316         char *modules_dep_name;
 317         char *line;
 318         FILE *modules_dep;
 319         int done = 0;
 320
 321         if (read_depends_bin(dirname, start_name, list))
 322                 return;
 323
 324         nofail_asprintf(&modules_dep_name, "%s/%s", dirname, "modules.dep");
 325         modules_dep = fopen(modules_dep_name, "r");
 326         if (!modules_dep)
 327                 fatal("Could not load %s: %s\n",
 328                       modules_dep_name, strerror(errno));
 329
 330         /* Stop at first line, as we can have duplicates (eg. symlinks
 331            from boot/ */
 332         while (!done && (line = getline_wrapped(modules_dep, NULL)) != NULL) {
 333                 done = add_modules_dep_line(line, start_name, list, dirname);
 334                 free(line);
 335         }
 336         fclose(modules_dep);
 337         free(modules_dep_name);
 338 }
 339
 340 /* We use error numbers in a loose translation... */
 341 static const char *insert_moderror(int err)
 342 {
 343         switch (err) {
 344         case ENOEXEC:
 345                 return "Invalid module format";
 346         case ENOENT:
 347                 return "Unknown symbol in module, or unknown parameter (see dmesg)";
 348         case ENOSYS:
 349                 return "Kernel does not have module support";
 350         default:
 351                 return strerror(err);
 352         }
 353 }
 354
 355 static const char *remove_moderror(int err)
 356 {
 357         switch (err) {
 358         case ENOENT:
 359                 return "No such module";
 360         case ENOSYS:
 361                 return "Kernel does not have module unloading support";
 362         default:
 363                 return strerror(err);
 364         }
 365 }
 366
 367 static void replace_modname(struct module *module,
 368                             void *mem, unsigned long len,
 369                             const char *oldname, const char *newname)
 370 {
 371         char *p;
 372
 373         /* 64 - sizeof(unsigned long) - 1 */
 374         if (strlen(newname) > 55)
 375                 fatal("New name %s is too long\n", newname);
 376
 377         /* Find where it is in the module structure.  Don't assume layout! */
 378         for (p = mem; p < (char *)mem + len - strlen(oldname); p++) {
 379                 if (memcmp(p, oldname, strlen(oldname)) == 0) {
 380                         strcpy(p, newname);
 381                         return;
 382                 }
 383         }
 384
 385         warn("Could not find old name in %s to replace!\n", module->filename);
 386 }
 387
 388 static void *get_section32(void *file,
 389                            unsigned long size,
 390                            const char *name,
 391                            unsigned long *secsize)
 392 {
 393         Elf32_Ehdr *hdr = file;
 394         Elf32_Shdr *sechdrs = file + hdr->e_shoff;
 395         const char *secnames;
 396         unsigned int i;
 397
 398         /* Too short? */
 399         if (size < sizeof(*hdr))
 400                 return NULL;
 401         if (size < hdr->e_shoff + hdr->e_shnum * sizeof(sechdrs[0]))
 402                 return NULL;
 403         if (size < sechdrs[hdr->e_shstrndx].sh_offset)
 404                 return NULL;
 405
 406         secnames = file + sechdrs[hdr->e_shstrndx].sh_offset;
 407         for (i = 1; i < hdr->e_shnum; i++)
 408                 if (strcmp(secnames + sechdrs[i].sh_name, name) == 0) {
 409                         *secsize = sechdrs[i].sh_size;
 410                         return file + sechdrs[i].sh_offset;
 411                 }
 412         return NULL;
 413 }
 414
 415 static void *get_section64(void *file,
 416                            unsigned long size,
 417                            const char *name,
 418                            unsigned long *secsize)
 419 {
 420         Elf64_Ehdr *hdr = file;
 421         Elf64_Shdr *sechdrs = file + hdr->e_shoff;
 422         const char *secnames;
 423         unsigned int i;
 424
 425         /* Too short? */
 426         if (size < sizeof(*hdr))
 427                 return NULL;
 428         if (size < hdr->e_shoff + hdr->e_shnum * sizeof(sechdrs[0]))
 429                 return NULL;
 430         if (size < sechdrs[hdr->e_shstrndx].sh_offset)
 431                 return NULL;
 432
 433         secnames = file + sechdrs[hdr->e_shstrndx].sh_offset;
 434         for (i = 1; i < hdr->e_shnum; i++)
 435                 if (strcmp(secnames + sechdrs[i].sh_name, name) == 0) {
 436                         *secsize = sechdrs[i].sh_size;
 437                         return file + sechdrs[i].sh_offset;
 438                 }
 439         return NULL;
 440 }
 441
 442 static int elf_ident(void *mod, unsigned long size)
 443 {
 444         /* "\177ELF" <byte> where byte = 001 for 32-bit, 002 for 64 */
 445         char *ident = mod;
 446
 447         if (size < EI_CLASS || memcmp(mod, ELFMAG, SELFMAG) != 0)
 448                 return ELFCLASSNONE;
 449         return ident[EI_CLASS];
 450 }
 451
 452 static void *get_section(void *file,
 453                          unsigned long size,
 454                          const char *name,
 455                          unsigned long *secsize)
 456 {
 457         switch (elf_ident(file, size)) {
 458         case ELFCLASS32:
 459                 return get_section32(file, size, name, secsize);
 460         case ELFCLASS64:
 461                 return get_section64(file, size, name, secsize);
 462         default:
 463                 return NULL;
 464         }
 465 }
 466
 467 static void rename_module(struct module *module,
 468                           void *mod,
 469                           unsigned long len,
 470                           const char *newname)
 471 {
 472         void *modstruct;
 473         unsigned long modstruct_len;
 474
 475         /* Old-style */
 476         modstruct = get_section(mod, len, ".gnu.linkonce.this_module",
 477                                 &modstruct_len);
 478         /* New-style */
 479         if (!modstruct)
 480                 modstruct = get_section(mod, len, "__module", &modstruct_len);
 481         if (!modstruct)
 482                 warn("Could not find module name to change in %s\n",
 483                      module->filename);
 484         else
 485                 replace_modname(module, modstruct, modstruct_len,
 486                                 module->modname, newname);
 487 }
 488
 489 /* Kernel told to ignore these sections if SHF_ALLOC not set. */
 490 static void invalidate_section32(void *mod, const char *secname)
 491 {
 492         Elf32_Ehdr *hdr = mod;
 493         Elf32_Shdr *sechdrs = mod + hdr->e_shoff;
 494         const char *secnames = mod + sechdrs[hdr->e_shstrndx].sh_offset;
 495         unsigned int i;
 496
 497         for (i = 1; i < hdr->e_shnum; i++)
 498                 if (strcmp(secnames+sechdrs[i].sh_name, secname) == 0)
 499                         sechdrs[i].sh_flags &= ~SHF_ALLOC;
 500 }
 501
 502 static void invalidate_section64(void *mod, const char *secname)
 503 {
 504         Elf64_Ehdr *hdr = mod;
 505         Elf64_Shdr *sechdrs = mod + hdr->e_shoff;
 506         const char *secnames = mod + sechdrs[hdr->e_shstrndx].sh_offset;
 507         unsigned int i;
 508
 509         for (i = 1; i < hdr->e_shnum; i++)
 510                 if (strcmp(secnames+sechdrs[i].sh_name, secname) == 0)
 511                         sechdrs[i].sh_flags &= ~(unsigned long long)SHF_ALLOC;
 512 }
 513
 514 static void strip_section(struct module *module,
 515                           void *mod,
 516                           unsigned long len,
 517                           const char *secname)
 518 {
 519         switch (elf_ident(mod, len)) {
 520         case ELFCLASS32:
 521                 invalidate_section32(mod, secname);
 522                 break;
 523         case ELFCLASS64:
 524                 invalidate_section64(mod, secname);
 525                 break;
 526         default:
 527                 warn("Unknown module format in %s: not forcing version\n",
 528                      module->filename);
 529         }
 530 }
 531
 532 static const char *next_string(const char *string, unsigned long *secsize)
 533 {
 534         /* Skip non-zero chars */
 535         while (string[0]) {
 536                 string++;
 537                 if ((*secsize)-- <= 1)
 538                         return NULL;
 539         }
 540
 541         /* Skip any zero padding. */
 542         while (!string[0]) {
 543                 string++;
 544                 if ((*secsize)-- <= 1)
 545                         return NULL;
 546         }
 547         return string;
 548 }
 549
 550 static void clear_magic(struct module *module, void *mod, unsigned long len)
 551 {
 552         const char *p;
 553         unsigned long modlen;
 554
 555         /* Old-style: __vermagic section */
 556         strip_section(module, mod, len, "__vermagic");
 557
 558         /* New-style: in .modinfo section */
 559         for (p = get_section(mod, len, ".modinfo", &modlen);
 560              p;
 561              p = next_string(p, &modlen)) {
 562                 if (strncmp(p, "vermagic=", strlen("vermagic=")) == 0) {
 563                         memset((char *)p, 0, strlen(p));
 564                         return;
 565                 }
 566         }
 567 }
 568
 569 struct module_options
 570 {
 571         struct module_options *next;
 572         char *modulename;
 573         char *options;
 574 };
 575
 576 struct module_command
 577 {
 578         struct module_command *next;
 579         char *modulename;
 580         char *command;
 581 };
 582
 583 struct module_alias
 584 {
 585         struct module_alias *next;
 586         char *module;
 587 };
 588
 589 struct module_blacklist
 590 {
 591         struct module_blacklist *next;
 592         char *modulename;
 593 };
 594
 595 /* Link in a new option line from the config file. */
 596 static struct module_options *
 597 add_options(const char *modname,
 598             const char *option,
 599             struct module_options *options)
 600 {
 601         struct module_options *new;
 602         char *tab;
 603
 604         new = NOFAIL(malloc(sizeof(*new)));
 605         new->modulename = NOFAIL(strdup(modname));
 606         new->options = NOFAIL(strdup(option));
 607         /* We can handle tabs, kernel can't. */
 608         for (tab = strchr(new->options, '\t'); tab; tab = strchr(tab, '\t'))
 609                 *tab = ' ';
 610         new->next = options;
 611         return new;
 612 }
 613
 614 /* Link in a new install line from the config file. */
 615 static struct module_command *
 616 add_command(const char *modname,
 617                const char *command,
 618                struct module_command *commands)
 619 {
 620         struct module_command *new;
 621
 622         new = NOFAIL(malloc(sizeof(*new)));
 623         new->modulename = NOFAIL(strdup(modname));
 624         new->command = NOFAIL(strdup(command));
 625         new->next = commands;
 626         return new;
 627 }
 628
 629 /* Link in a new alias line from the config file. */
 630 static struct module_alias *
 631 add_alias(const char *modname, struct module_alias *aliases)
 632 {
 633         struct module_alias *new;
 634
 635         new = NOFAIL(malloc(sizeof(*new)));
 636         new->module = NOFAIL(strdup(modname));
 637         new->next = aliases;
 638         return new;
 639 }
 640
 641 /* Link in a new blacklist line from the config file. */
 642 static struct module_blacklist *
 643 add_blacklist(const char *modname, struct module_blacklist *blacklist)
 644 {
 645         struct module_blacklist *new;
 646
 647         new = NOFAIL(malloc(sizeof(*new)));
 648         new->modulename = NOFAIL(strdup(modname));
 649         new->next = blacklist;
 650         return new;
 651 }
 652
 653 /* Find blacklist commands if any. */
 654 static  int
 655 find_blacklist(const char *modname, const struct module_blacklist *blacklist)
 656 {
 657         while (blacklist) {
 658                 if (strcmp(blacklist->modulename, modname) == 0)
 659                         return 1;
 660                 blacklist = blacklist->next;
 661         }
 662         return 0;
 663 }
 664
 665 /* return a new alias list, with backlisted elems filtered out */
 666 static struct module_alias *
 667 apply_blacklist(const struct module_alias *aliases,
 668                 const struct module_blacklist *blacklist)
 669 {
 670         struct module_alias *result = NULL;
 671         while (aliases) {
 672                 char *modname = aliases->module;
 673                 if (!find_blacklist(modname, blacklist))
 674                         result = add_alias(modname, result);
 675                 aliases = aliases->next;
 676         }
 677         return result;
 678 }
 679
 680 /* Find install commands if any. */
 681 static const char *find_command(const char *modname,
 682                                 const struct module_command *commands)
 683 {
 684         while (commands) {
 685                 if (fnmatch(commands->modulename, modname, 0) == 0)
 686                         return commands->command;
 687                 commands = commands->next;
 688         }
 689         return NULL;
 690 }
 691
 692 static char *append_option(char *options, const char *newoption)
 693 {
 694         options = NOFAIL(realloc(options, strlen(options) + 1
 695                                  + strlen(newoption) + 1));
 696         if (strlen(options)) strcat(options, " ");
 697         strcat(options, newoption);
 698         return options;
 699 }
 700
 701 /* Add to options */
 702 static char *add_extra_options(const char *modname,
 703                                char *optstring,
 704                                const struct module_options *options)
 705 {
 706         while (options) {
 707                 if (strcmp(options->modulename, modname) == 0)
 708                         optstring = append_option(optstring, options->options);
 709                 options = options->next;
 710         }
 711         return optstring;
 712 }
 713
 714 /* Read sysfs attribute into a buffer.
 715  * returns: 1 = ok, 0 = attribute missing,
 716  * -1 = file error (or empty file, but we don't care).
 717  */
 718 static int read_attribute(const char *filename, char *buf, size_t buflen)
 719 {
 720         FILE *file;
 721         char *s;
 722
 723         file = fopen(filename, "r");
 724         if (file == NULL)
 725                 return (errno == ENOENT) ? 0 : -1;
 726         s = fgets(buf, buflen, file);
 727         fclose(file);
 728
 729         return (s == NULL) ? -1 : 1;
 730 }
 731
 732 /* Is module in /sys/module?  If so, fill in usecount if not NULL.
 733    0 means no, 1 means yes, -1 means unknown.
 734  */
 735 static int module_in_kernel(const char *modname, unsigned int *usecount)
 736 {
 737         int ret;
 738         char *name;
 739         struct stat finfo;
 740
 741         const int ATTR_LEN = 16;
 742         char attr[ATTR_LEN];
 743
 744         /* Find module. We assume sysfs is mounted. */
 745         nofail_asprintf(&name, "/sys/module/%s", modname);
 746         ret = stat(name, &finfo);
 747         free(name);
 748         if (ret < 0)
 749                 return (errno == ENOENT) ? 0 : -1; /* Not found or unknown. */
 750
 751         /* Wait for the existing module to either go live or disappear. */
 752         nofail_asprintf(&name, "/sys/module/%s/initstate", modname);
 753         while (1) {
 754                 ret = read_attribute(name, attr, ATTR_LEN);
 755                 if (ret != 1 || streq(attr, "live\n"))
 756                         break;
 757
 758                 usleep(100000);
 759         }
 760         free(name);
 761
 762         if (ret != 1)
 763                 return ret;
 764
 765         /* Get reference count, if it exists. */
 766         if (usecount != NULL) {
 767                 nofail_asprintf(&name, "/sys/module/%s/refcnt", modname);
 768                 ret = read_attribute(name, attr, ATTR_LEN);
 769                 free(name);
 770                 if (ret == 1)
 771                         *usecount = atoi(attr);
 772         }
 773
 774         return 1;
 775 }
 776
 777 /* If we don't flush, then child processes print before we do */
 778 static void verbose_printf(int verbose, const char *fmt, ...)
 779 {
 780         va_list arglist;
 781
 782         if (verbose) {
 783                 va_start(arglist, fmt);
 784                 vprintf(fmt, arglist);
 785                 fflush(stdout);
 786                 va_end(arglist);
 787         }
 788 }
 789
 790 /* Do an install/remove command: replace $CMDLINE_OPTS if it's specified. */
 791 static void do_command(const char *modname,
 792                        const char *command,
 793                        int verbose, int dry_run,
 794                        errfn_t error,
 795                        const char *type,
 796                        const char *cmdline_opts)
 797 {
 798         int ret;
 799         char *p, *replaced_cmd = NOFAIL(strdup(command));
 800
 801         while ((p = strstr(replaced_cmd, "$CMDLINE_OPTS")) != NULL) {
 802                 char *new;
 803                 nofail_asprintf(&new, "%.*s%s%s",
 804                          (int)(p - replaced_cmd), replaced_cmd, cmdline_opts,
 805                          p + strlen("$CMDLINE_OPTS"));
 806                 free(replaced_cmd);
 807                 replaced_cmd = new;
 808         }
 809
 810         verbose_printf(verbose, "%s %s\n", type, replaced_cmd);
 811         if (dry_run)
 812                 return;
 813
 814         setenv("MODPROBE_MODULE", modname, 1);
 815         ret = system(replaced_cmd);
 816         if (ret == -1 || WEXITSTATUS(ret))
 817                 error("Error running %s command for %s\n", type, modname);
 818         free(replaced_cmd);
 819 }
 820
 821 /* Actually do the insert.  Frees second arg. */
 822 static void insmod(struct list_head *list,
 823                    char *optstring,
 824                    const char *newname,
 825                    int first_time,
 826                    errfn_t error,
 827                    int dry_run,
 828                    int verbose,
 829                    const struct module_options *options,
 830                    const struct module_command *commands,
 831                    int ignore_commands,
 832                    int ignore_proc,
 833                    int strip_vermagic,
 834                    int strip_modversion,
 835                    const char *cmdline_opts)
 836 {
 837         int ret, fd;
 838         unsigned long len;
 839         void *map;
 840         const char *command;
 841         struct module *mod = list_entry(list->next, struct module, list);
 842
 843         /* Take us off the list. */
 844         list_del(&mod->list);
 845
 846         /* Do things we (or parent) depend on first, but don't die if
 847          * they fail. */
 848         if (!list_empty(list)) {
 849                 insmod(list, NOFAIL(strdup("")), NULL, 0, warn,
 850                        dry_run, verbose, options, commands, 0, ignore_proc,
 851                        strip_vermagic, strip_modversion, "");
 852         }
 853
 854         /* Lock before we look, in case it's initializing. */
 855         fd = lock_file(mod->filename);
 856         if (fd < 0) {
 857                 error("Could not open '%s': %s\n",
 858                       mod->filename, strerror(errno));
 859                 goto out_optstring;
 860         }
 861
 862         /* Don't do ANYTHING if already in kernel. */
 863         if (!ignore_proc
 864             && module_in_kernel(newname ?: mod->modname, NULL) == 1) {
 865                 if (first_time)
 866                         error("Module %s already in kernel.\n",
 867                               newname ?: mod->modname);
 868                 goto out_unlock;
 869         }
 870
 871         command = find_command(mod->modname, commands);
 872         if (command && !ignore_commands) {
 873                 /* It might recurse: unlock. */
 874                 unlock_file(fd);
 875                 do_command(mod->modname, command, verbose, dry_run, error,
 876                            "install", cmdline_opts);
 877                 goto out_optstring;
 878         }
 879
 880         map = grab_fd(fd, &len);
 881         if (!map) {
 882                 error("Could not read '%s': %s\n",
 883                       mod->filename, strerror(errno));
 884                 goto out_unlock;
 885         }
 886
 887         /* Rename it? */
 888         if (newname)
 889                 rename_module(mod, map, len, newname);
 890
 891         if (strip_modversion)
 892                 strip_section(mod, map, len, "__versions");
 893         if (strip_vermagic)
 894                 clear_magic(mod, map, len);
 895
 896         /* Config file might have given more options */
 897         optstring = add_extra_options(mod->modname, optstring, options);
 898
 899         verbose_printf(verbose, "insmod %s %s\n", mod->filename, optstring);
 900
 901         if (dry_run)
 902                 goto out;
 903
 904         ret = init_module(map, len, optstring);
 905         if (ret != 0) {
 906                 if (errno == EEXIST) {
 907                         if (first_time)
 908                                 error("Module %s already in kernel.\n",
 909                                       newname ?: mod->modname);
 910                         goto out_unlock;
 911                 }
 912                 /* don't warn noisely if we're loading multiple aliases. */
 913                 /* one of the aliases may try to use hardware we don't have. */
 914                 if ((error != warn) || (verbose))
 915                         error("Error inserting %s (%s): %s\n",
 916                               mod->modname, mod->filename,
 917                               insert_moderror(errno));
 918         }
 919  out:
 920         release_file(map, len);
 921  out_unlock:
 922         unlock_file(fd);
 923  out_optstring:
 924         free(optstring);
 925         return;
 926 }
 927
 928 /* Do recursive removal. */
 929 static void rmmod(struct list_head *list,
 930                   const char *name,
 931                   int first_time,
 932                   errfn_t error,
 933                   int dry_run,
 934                   int verbose,
 935                   struct module_command *commands,
 936                   int ignore_commands,
 937                   int ignore_inuse,
 938                   const char *cmdline_opts,
 939                   int flags)
 940 {
 941         const char *command;
 942         unsigned int usecount = 0;
 943         int lock;
 944         struct module *mod = list_entry(list->next, struct module, list);
 945
 946         /* Take first one off the list. */
 947         list_del(&mod->list);
 948
 949         /* Ignore failure; it's best effort here. */
 950         lock = lock_file(mod->filename);
 951
 952         if (!name)
 953                 name = mod->modname;
 954
 955         /* Even if renamed, find commands to orig. name. */
 956         command = find_command(mod->modname, commands);
 957         if (command && !ignore_commands) {
 958                 /* It might recurse: unlock. */
 959                 unlock_file(lock);
 960                 do_command(mod->modname, command, verbose, dry_run, error,
 961                            "remove", cmdline_opts);
 962                 goto remove_rest_no_unlock;
 963         }
 964
 965         if (module_in_kernel(name, &usecount) == 0)
 966                 goto nonexistent_module;
 967
 968         if (usecount != 0) {
 969                 if (!ignore_inuse)
 970                         error("Module %s is in use.\n", name);
 971                 goto remove_rest;
 972         }
 973
 974         verbose_printf(verbose, "rmmod %s\n", mod->filename);
 975
 976         if (dry_run)
 977                 goto remove_rest;
 978
 979         if (delete_module(name, O_EXCL) != 0) {
 980                 if (errno == ENOENT)
 981                         goto nonexistent_module;
 982                 error("Error removing %s (%s): %s\n",
 983                       name, mod->filename,
 984                       remove_moderror(errno));
 985         }
 986
 987  remove_rest:
 988         unlock_file(lock);
 989  remove_rest_no_unlock:
 990         /* Now do things we depend. */
 991         if (!list_empty(list))
 992                 rmmod(list, NULL, 0, warn, dry_run, verbose, commands,
 993                       0, 1, "", flags);
 994         return;
 995
 996 nonexistent_module:
 997         if (first_time)
 998                 fatal("Module %s is not in kernel.\n", mod->modname);
 999         goto remove_rest;
1000 }
1001
1002 struct modver32_info
1003 {
1004        uint32_t crc;
1005        char name[64 - sizeof(uint32_t)];
1006 };
1007
1008 struct modver64_info
1009 {
1010        uint64_t crc;
1011        char name[64 - sizeof(uint64_t)];
1012 };
1013
1014 const char *skip_dot(const char *str)
1015 {
1016        /* For our purposes, .foo matches foo.  PPC64 needs this. */
1017        if (str && str[0] == '.')
1018                return str + 1;
1019        return str;
1020 }
1021
1022 void dump_modversions(const char *filename, errfn_t error)
1023 {
1024        unsigned long size, secsize;
1025        void *file = grab_file(filename, &size);
1026        struct modver32_info *info32;
1027        struct modver64_info *info64;
1028        int n;
1029
1030        if (!file) {
1031                error("%s: %s\n", filename, strerror(errno));
1032                return;
1033        }
1034        switch (elf_ident(file, size)) {
1035        case ELFCLASS32:
1036                info32 = get_section32(file, size, "__versions", &secsize);
1037                if (!info32)
1038                        return;  /* Does not seem to be a kernel module */
1039                if (secsize % sizeof(struct modver32_info))
1040                        error("Wrong section size in %s\n", filename);
1041                for (n = 0; n < secsize / sizeof(struct modver32_info); n++)
1042                        printf("0x%08lx\t%s\n", (unsigned long)
1043                               info32[n].crc, skip_dot(info32[n].name));
1044                break;
1045
1046        case ELFCLASS64:
1047                info64 = get_section64(file, size, "__versions", &secsize);
1048                if (!info64)
1049                        return;  /* Does not seem to be a kernel module */
1050                if (secsize % sizeof(struct modver64_info))
1051                        error("Wrong section size in %s\n", filename);
1052                for (n = 0; n < secsize / sizeof(struct modver64_info); n++)
1053                        printf("0x%08llx\t%s\n", (unsigned long long)
1054                               info64[n].crc, skip_dot(info64[n].name));
1055                break;
1056
1057        default:
1058                error("%s: ELF class not recognized\n", filename);
1059        }
1060 }
1061
1062
1063 /* Does path contain directory(s) subpath? */
1064 static int type_matches(const char *path, const char *subpath)
1065 {
1066         char *subpath_with_slashes;
1067         int ret;
1068
1069         nofail_asprintf(&subpath_with_slashes, "/%s/", subpath);
1070
1071         ret = (strstr(path, subpath_with_slashes) != NULL);
1072         free(subpath_with_slashes);
1073         return ret;
1074 }
1075
1076 /* Careful!  Don't munge - in [ ] as per Debian Bug#350915 */
1077 static char *underscores(char *string)
1078 {
1079         if (string) {
1080                 unsigned int i;
1081                 int inbracket = 0;
1082                 for (i = 0; string[i]; i++) {
1083                         switch (string[i]) {
1084                         case '[':
1085                                 inbracket++;
1086                                 break;
1087                         case ']':
1088                                 inbracket--;
1089                                 break;
1090                         case '-':
1091                                 if (!inbracket)
1092                                         string[i] = '_';
1093                         }
1094                 }
1095                 if (inbracket)
1096                         warn("Unmatched bracket in %s\n", string);
1097         }
1098         return string;
1099 }
1100
1101 static int do_wildcard(const char *dirname,
1102                        const char *type,
1103                        const char *wildcard)
1104 {
1105         char *modules_dep_name;
1106         char *line, *wcard;
1107         FILE *modules_dep;
1108
1109         /* Canonicalize wildcard */
1110         wcard = strdup(wildcard);
1111         underscores(wcard);
1112
1113         nofail_asprintf(&modules_dep_name, "%s/%s", dirname, "modules.dep");
1114         modules_dep = fopen(modules_dep_name, "r");
1115         if (!modules_dep)
1116                 fatal("Could not load %s: %s\n",
1117                       modules_dep_name, strerror(errno));
1118
1119         while ((line = getline_wrapped(modules_dep, NULL)) != NULL) {
1120                 char *ptr;
1121
1122                 /* Ignore lines without : or which start with a # */
1123                 ptr = strchr(line, ':');
1124                 if (ptr == NULL || line[strspn(line, "\t ")] == '#')
1125                         goto next;
1126                 *ptr = '\0';
1127
1128                 /* "type" must match complete directory component(s). */
1129                 if (!type || type_matches(line, type)) {
1130                         char modname[strlen(line)+1];
1131
1132                         filename2modname(modname, line);
1133                         if (fnmatch(wcard, modname, 0) == 0)
1134                                 printf("%s\n", line);
1135                 }
1136         next:
1137                 free(line);
1138         }
1139
1140         free(modules_dep_name);
1141         free(wcard);
1142         return 0;
1143 }
1144
1145 static char *strsep_skipspace(char **string, char *delim)
1146 {
1147         if (!*string)
1148                 return NULL;
1149         *string += strspn(*string, delim);
1150         return strsep(string, delim);
1151 }
1152
1153 /* Recursion */
1154 static int read_config(const char *filename,
1155                        const char *name,
1156                        int dump_only,
1157                        int removing,
1158                        struct module_options **options,
1159                        struct module_command **commands,
1160                        struct module_alias **alias,
1161                        struct module_blacklist **blacklist);
1162
1163 /* FIXME: Maybe should be extended to "alias a b [and|or c]...". --RR */
1164 static int read_config_file(const char *filename,
1165                             const char *name,
1166                             int dump_only,
1167                             int removing,
1168                             struct module_options **options,
1169                             struct module_command **commands,
1170                             struct module_alias **aliases,
1171                             struct module_blacklist **blacklist)
1172 {
1173         char *line;
1174         unsigned int linenum = 0;
1175         FILE *cfile;
1176
1177         cfile = fopen(filename, "r");
1178         if (!cfile)
1179                 return 0;
1180
1181         while ((line = getline_wrapped(cfile, &linenum)) != NULL) {
1182                 char *ptr = line;
1183                 char *cmd, *modname;
1184
1185                 if (dump_only)
1186                         printf("%s\n", line);
1187
1188                 cmd = strsep_skipspace(&ptr, "\t ");
1189                 if (cmd == NULL || cmd[0] == '#' || cmd[0] == '\0') {
1190                         free(line);
1191                         continue;
1192                 }
1193
1194                 if (strcmp(cmd, "alias") == 0) {
1195                         char *wildcard
1196                                 = underscores(strsep_skipspace(&ptr, "\t "));
1197                         char *realname
1198                                 = underscores(strsep_skipspace(&ptr, "\t "));
1199
1200                         if (!wildcard || !realname)
1201                                 grammar(cmd, filename, linenum);
1202                         else if (fnmatch(wildcard,name,0) == 0)
1203                                 *aliases = add_alias(realname, *aliases);
1204                 } else if (strcmp(cmd, "include") == 0) {
1205                         struct module_alias *newalias = NULL;
1206                         char *newfilename;
1207
1208                         newfilename = strsep_skipspace(&ptr, "\t ");
1209                         if (!newfilename)
1210                                 grammar(cmd, filename, linenum);
1211                         else {
1212                                 if (!read_config(newfilename, name,
1213                                                  dump_only, removing,
1214                                                  options, commands, &newalias,
1215                                                  blacklist))
1216                                         warn("Failed to open included"
1217                                               " config file %s: %s\n",
1218                                               newfilename, strerror(errno));
1219
1220                                 /* Files included override aliases,
1221                                    etc that was already set ... */
1222                                 if (newalias)
1223                                         *aliases = newalias;
1224                         }
1225                 } else if (strcmp(cmd, "options") == 0) {
1226                         modname = strsep_skipspace(&ptr, "\t ");
1227                         if (!modname || !ptr)
1228                                 grammar(cmd, filename, linenum);
1229                         else {
1230                                 ptr += strspn(ptr, "\t ");
1231                                 *options = add_options(underscores(modname),
1232                                                        ptr, *options);
1233                         }
1234                 } else if (strcmp(cmd, "install") == 0) {
1235                         modname = strsep_skipspace(&ptr, "\t ");
1236                         if (!modname || !ptr)
1237                                 grammar(cmd, filename, linenum);
1238                         else if (!removing) {
1239                                 ptr += strspn(ptr, "\t ");
1240                                 *commands = add_command(underscores(modname),
1241                                                         ptr, *commands);
1242                         }
1243                 } else if (strcmp(cmd, "blacklist") == 0) {
1244                         modname = strsep_skipspace(&ptr, "\t ");
1245                         if (!modname)
1246                                 grammar(cmd, filename, linenum);
1247                         else if (!removing) {
1248                                 *blacklist = add_blacklist(underscores(modname),
1249                                                         *blacklist);
1250                         }
1251                 } else if (strcmp(cmd, "remove") == 0) {
1252                         modname = strsep_skipspace(&ptr, "\t ");
1253                         if (!modname || !ptr)
1254                                 grammar(cmd, filename, linenum);
1255                         else if (removing) {
1256                                 ptr += strspn(ptr, "\t ");
1257                                 *commands = add_command(underscores(modname),
1258                                                         ptr, *commands);
1259                         }
1260                 } else if (strcmp(cmd, "config") == 0) {
1261                         char *tmp = strsep_skipspace(&ptr, "\t ");
1262                         if (strcmp(tmp, "binary_indexes") == 0) {
1263                                 tmp = strsep_skipspace(&ptr, "\t ");
1264                                 if (strcmp(tmp, "yes") == 0)
1265                                         use_binary_indexes = 1;
1266                                 if (strcmp(tmp, "no") == 0)
1267                                         use_binary_indexes = 0;
1268                         }
1269                 } else
1270                         grammar(cmd, filename, linenum);
1271
1272                 free(line);
1273         }
1274         fclose(cfile);
1275         return 1;
1276 }
1277
1278 /* Simple format, ignore lines starting with #, one command per line.
1279    Returns true or false. */
1280 static int read_config(const char *filename,
1281                        const char *name,
1282                        int dump_only,
1283                        int removing,
1284                        struct module_options **options,
1285                        struct module_command **commands,
1286                        struct module_alias **aliases,
1287                        struct module_blacklist **blacklist)
1288 {
1289         DIR *dir;
1290         int ret = 0;
1291
1292         /* Reiser4 has file/directory duality: treat it as both. */
1293         dir = opendir(filename);
1294         if (dir) {
1295                 struct dirent *i;
1296                 while ((i = readdir(dir)) != NULL) {
1297                         if (!streq(i->d_name,".") && !streq(i->d_name,"..")
1298                             && config_filter(i->d_name)) {
1299                                 char sub[strlen(filename) + 1
1300                                          + strlen(i->d_name) + 1];
1301
1302                                 sprintf(sub, "%s/%s", filename, i->d_name);
1303                                 if (!read_config(sub, name,
1304                                                  dump_only, removing, options,
1305                                                  commands, aliases, blacklist))
1306                                         warn("Failed to open"
1307                                              " config file %s: %s\n",
1308                                              sub, strerror(errno));
1309                         }
1310                 }
1311                 closedir(dir);
1312                 ret = 1;
1313         }
1314
1315         if (read_config_file(filename, name, dump_only, removing,
1316                              options, commands, aliases, blacklist))
1317                 ret = 1;
1318
1319         return ret;
1320 }
1321
1322 /* Read binary index file containing aliases only */
1323 /* fallback to legacy aliases file as necessary */
1324 static int read_config_file_bin(const char *filename,
1325                             const char *name,
1326                             int dump_only,
1327                             int removing,
1328                             struct module_options **options,
1329                             struct module_command **commands,
1330                             struct module_alias **aliases,
1331                             struct module_blacklist **blacklist)
1332 {
1333         struct index_value *realname;
1334         char *binfile;
1335         FILE *cfile;
1336
1337         nofail_asprintf(&binfile, "%s.bin", filename);
1338         cfile = fopen(binfile, "r");
1339         if (!cfile) {
1340                 free(binfile);
1341
1342                 return read_config_file(filename, name, dump_only, removing,
1343                                         options, commands, aliases, blacklist);
1344         }
1345
1346         if (dump_only) {
1347                 index_dump(cfile, stdout, "alias ");
1348                 free(binfile);
1349                 fclose(cfile);
1350                 return 1;
1351         }
1352
1353         realname = index_searchwild(cfile, name);
1354         while(realname) {
1355                 struct index_value *next = realname->next;
1356                 *aliases = add_alias(realname->value, *aliases);
1357
1358                 free(realname);
1359                 realname = next;
1360         }
1361
1362         free(binfile);
1363         fclose(cfile);
1364         return 1;
1365 }
1366
1367 static const char *default_configs[] =
1368 {
1369         "/etc/modprobe.conf",
1370         "/etc/modprobe.d",
1371 };
1372
1373 static void read_toplevel_config(const char *filename,
1374                                  const char *name,
1375                                  int dump_only,
1376                                  int removing,
1377                                  struct module_options **options,
1378                                  struct module_command **commands,
1379                                  struct module_alias **aliases,
1380                                  struct module_blacklist **blacklist)
1381 {
1382         unsigned int i;
1383
1384         if (filename) {
1385                 if (!read_config(filename, name, dump_only, removing,
1386                                  options, commands, aliases, blacklist))
1387                         fatal("Failed to open config file %s: %s\n",
1388                               filename, strerror(errno));
1389                 return;
1390         }
1391
1392         /* Try defaults. */
1393         for (i = 0; i < ARRAY_SIZE(default_configs); i++) {
1394                 read_config(default_configs[i], name, dump_only, removing,
1395                                 options, commands, aliases, blacklist);
1396         }
1397 }
1398
1399 /* Read possible module arguments from the kernel command line. */
1400 static int read_kcmdline(int dump_only, struct module_options **options)
1401 {
1402         char *line;
1403         unsigned int linenum = 0;
1404         FILE *kcmdline;
1405
1406         kcmdline = fopen("/proc/cmdline", "r");
1407         if (!kcmdline)
1408                 return 0;
1409
1410         while ((line = getline_wrapped(kcmdline, &linenum)) != NULL) {
1411                 char *ptr = line;
1412                 char *arg;
1413
1414                 while ((arg = strsep_skipspace(&ptr, "\t ")) != NULL) {
1415                         char *sep, *modname, *opt;
1416
1417                         sep = strchr(arg, '.');
1418                         if (sep) {
1419                                 if (!strchr(sep, '='))
1420                                         continue;
1421                                 modname = arg;
1422                                 *sep = '\0';
1423                                 opt = ++sep;
1424
1425                                 if (dump_only)
1426                                         printf("options %s %s\n", modname, opt);
1427
1428                                 *options = add_options(underscores(modname),
1429                                                        opt, *options);
1430                         }
1431                 }
1432
1433                 free(line);
1434         }
1435         fclose(kcmdline);
1436         return 1;
1437 }
1438
1439 static void add_to_env_var(const char *option)
1440 {
1441         const char *oldenv;
1442
1443         if ((oldenv = getenv("MODPROBE_OPTIONS")) != NULL) {
1444                 char *newenv;
1445                 nofail_asprintf(&newenv, "%s %s", oldenv, option);
1446                 setenv("MODPROBE_OPTIONS", newenv, 1);
1447         } else
1448                 setenv("MODPROBE_OPTIONS", option, 1);
1449 }
1450
1451 /* Prepend options from environment. */
1452 static char **merge_args(char *args, char *argv[], int *argc)
1453 {
1454         char *arg, *argstring;
1455         char **newargs = NULL;
1456         unsigned int i, num_env = 0;
1457
1458         if (!args)
1459                 return argv;
1460
1461         argstring = NOFAIL(strdup(args));
1462         for (arg = strtok(argstring, " "); arg; arg = strtok(NULL, " ")) {
1463                 num_env++;
1464                 newargs = NOFAIL(realloc(newargs,
1465                                          sizeof(newargs[0])
1466                                          * (num_env + *argc + 1)));
1467                 newargs[num_env] = arg;
1468         }
1469
1470         /* Append commandline args */
1471         newargs[0] = argv[0];
1472         for (i = 1; i <= *argc; i++)
1473                 newargs[num_env+i] = argv[i];
1474
1475         *argc += num_env;
1476         return newargs;
1477 }
1478
1479 static char *gather_options(char *argv[])
1480 {
1481         char *optstring = NOFAIL(strdup(""));
1482
1483         /* Rest is module options */
1484         while (*argv) {
1485                 /* Quote value if it contains spaces. */
1486                 unsigned int eq = strcspn(*argv, "=");
1487
1488                 if (strchr(*argv+eq, ' ') && !strchr(*argv, '"')) {
1489                         char quoted[strlen(*argv) + 3];
1490                         (*argv)[eq] = '\0';
1491                         sprintf(quoted, "%s=\"%s\"", *argv, *argv+eq+1);
1492                         optstring = append_option(optstring, quoted);
1493                 } else
1494                         optstring = append_option(optstring, *argv);
1495                 argv++;
1496         }
1497         return optstring;
1498 }
1499
1500 static void handle_module(const char *modname,
1501                           struct list_head *todo_list,
1502                           const char *newname,
1503                           int remove,
1504                           char *options,
1505                           int first_time,
1506                           errfn_t error,
1507                           int dry_run,
1508                           int verbose,
1509                           struct module_options *modoptions,
1510                           struct module_command *commands,
1511                           int ignore_commands,
1512                           int ignore_proc,
1513                           int strip_vermagic,
1514                           int strip_modversion,
1515                           int unknown_silent,
1516                           const char *cmdline_opts,
1517                           int flags)
1518 {
1519         struct stat finfo;
1520
1521         if (stat("/sys/module", &finfo) < 0)
1522                 fatal("/sys is not mounted.\n");
1523
1524         if (list_empty(todo_list)) {
1525                 const char *command;
1526
1527                 /* The dependencies have to be real modules, but
1528                    handle case where the first is completely bogus. */
1529                 command = find_command(modname, commands);
1530                 if (command && !ignore_commands) {
1531                         do_command(modname, command, verbose, dry_run, error,
1532                                    remove ? "remove":"install", cmdline_opts);
1533                         return;
1534                 }
1535
1536                 if (unknown_silent)
1537                         exit(1);
1538                 error("Module %s not found.\n", modname);
1539                 return;
1540         }
1541
1542         if (remove)
1543                 rmmod(todo_list, newname, first_time, error, dry_run, verbose,
1544                       commands, ignore_commands, 0, cmdline_opts, flags);
1545         else
1546                 insmod(todo_list, NOFAIL(strdup(options)), newname,
1547                        first_time, error, dry_run, verbose, modoptions,
1548                        commands, ignore_commands, ignore_proc, strip_vermagic,
1549                        strip_modversion, cmdline_opts);
1550 }
1551
1552 static struct option options[] = { { "verbose", 0, NULL, 'v' },
1553                                    { "version", 0, NULL, 'V' },
1554                                    { "config", 1, NULL, 'C' },
1555                                    { "name", 1, NULL, 'o' },
1556                                    { "remove", 0, NULL, 'r' },
1557                                    { "wait", 0, NULL, 'w' },
1558                                    { "showconfig", 0, NULL, 'c' },
1559                                    { "autoclean", 0, NULL, 'k' },
1560                                    { "quiet", 0, NULL, 'q' },
1561                                    { "show", 0, NULL, 'n' },
1562                                    { "dry-run", 0, NULL, 'n' },
1563                                    { "syslog", 0, NULL, 's' },
1564                                    { "type", 1, NULL, 't' },
1565                                    { "list", 0, NULL, 'l' },
1566                                    { "all", 0, NULL, 'a' },
1567                                    { "ignore-install", 0, NULL, 'i' },
1568                                    { "ignore-remove", 0, NULL, 'i' },
1569                                    { "force", 0, NULL, 'f' },
1570                                    { "force-vermagic", 0, NULL, 1 },
1571                                    { "force-modversion", 0, NULL, 2 },
1572                                    { "set-version", 1, NULL, 'S' },
1573                                    { "show-depends", 0, NULL, 'D' },
1574                                    { "dirname", 1, NULL, 'd' },
1575                                    { "first-time", 0, NULL, 3 },
1576                                    { "dump-modversions", 0, NULL, 4 },
1577                                    { "use-blacklist", 0, NULL, 'b' },
1578                                    { NULL, 0, NULL, 0 } };
1579
1580 int main(int argc, char *argv[])
1581 {
1582         struct utsname buf;
1583         struct stat statbuf;
1584         int opt;
1585         int dump_only = 0;
1586         int dry_run = 0;
1587         int remove = 0;
1588         int verbose = 0;
1589         int unknown_silent = 0;
1590         int list_only = 0;
1591         int all = 0;
1592         int ignore_commands = 0;
1593         int strip_vermagic = 0;
1594         int strip_modversion = 0;
1595         int ignore_proc = 0;
1596         int first_time = 0;
1597         int dump_modver = 0;
1598         int use_blacklist = 0;
1599         unsigned int i, num_modules;
1600         char *type = NULL;
1601         const char *config = NULL;
1602         char *dirname = NULL;
1603         char *optstring = NULL;
1604         char *newname = NULL;
1605         char *aliasfilename, *symfilename;
1606         errfn_t error = fatal;
1607         int flags = O_NONBLOCK|O_EXCL;
1608
1609         /* Prepend options from environment. */
1610         argv = merge_args(getenv("MODPROBE_OPTIONS"), argv, &argc);
1611
1612         uname(&buf);
1613         while ((opt = getopt_long(argc, argv, "vVC:o:rknqQsclt:aifbwd:", options, NULL)) != -1){
1614                 switch (opt) {
1615                 case 'v':
1616                         add_to_env_var("-v");
1617                         verbose = 1;
1618                         break;
1619                 case 'V':
1620                         puts(PACKAGE " version " VERSION);
1621                         exit(0);
1622                 case 'S':
1623                         strncpy(buf.release, optarg, sizeof(buf.release));
1624                         buf.release[sizeof(buf.release)-1] = '\0';
1625                         break;
1626                 case 'C':
1627                         config = optarg;
1628                         add_to_env_var("-C");
1629                         add_to_env_var(config);
1630                         break;
1631                 case 'q':
1632                         unknown_silent = 1;
1633                         add_to_env_var("-q");
1634                         break;
1635                 case 'D':
1636                         dry_run = 1;
1637                         ignore_proc = 1;
1638                         verbose = 1;
1639                         add_to_env_var("-D");
1640                         break;
1641                 case 'o':
1642                         newname = optarg;
1643                         break;
1644                 case 'r':
1645                         remove = 1;
1646                         break;
1647                 case 'c':
1648                         dump_only = 1;
1649                         break;
1650                 case 't':
1651                         type = optarg;
1652                         break;
1653                 case 'l':
1654                         list_only = 1;
1655                         break;
1656                 case 'a':
1657                         all = 1;
1658                         error = warn;
1659                         break;
1660                 case 'k':
1661                         /* FIXME: This should actually do something */
1662                         break;
1663                 case 'n':
1664                         dry_run = 1;
1665                         break;
1666                 case 's':
1667                         add_to_env_var("-s");
1668                         logging = 1;
1669                         break;
1670                 case 'i':
1671                         ignore_commands = 1;
1672                         break;
1673                 case 'f':
1674                         strip_vermagic = 1;
1675                         strip_modversion = 1;
1676                         break;
1677                 case 'b':
1678                         use_blacklist = 1;
1679                         break;
1680                 case 'w':
1681                         flags &= ~O_NONBLOCK;
1682                         break;
1683                 case 'd':
1684                         nofail_asprintf(&dirname, "%s/%s/%s", optarg,
1685                                         MODULE_DIR, buf.release);
1686                         break;
1687                 case 1:
1688                         strip_vermagic = 1;
1689                         break;
1690                 case 2:
1691                         strip_modversion = 1;
1692                         break;
1693                 case 3:
1694                         first_time = 1;
1695                         break;
1696                 case 4:
1697                         dump_modver = 1;
1698                         break;
1699                 default:
1700                         print_usage(argv[0]);
1701                 }
1702         }
1703
1704         /* If stderr not open, go to syslog */
1705         if (logging || fstat(STDERR_FILENO, &statbuf) != 0) {
1706                 openlog("modprobe", LOG_CONS, LOG_DAEMON);
1707                 logging = 1;
1708         }
1709
1710         if (argc < optind + 1 && !dump_only && !list_only && !remove)
1711                 print_usage(argv[0]);
1712
1713         if (!dirname)
1714                 nofail_asprintf(&dirname, "%s/%s", MODULE_DIR, buf.release);
1715         nofail_asprintf(&aliasfilename, "%s/modules.alias", dirname);
1716         nofail_asprintf(&symfilename, "%s/modules.symbols", dirname);
1717
1718         /* Old-style -t xxx wildcard?  Only with -l. */
1719         if (list_only) {
1720                 if (optind+1 < argc)
1721                         fatal("Can't have multiple wildcards\n");
1722                 /* fprintf(stderr, "man find\n"); return 1; */
1723                 return do_wildcard(dirname, type, argv[optind]?:"*");
1724         }
1725         if (type)
1726                 fatal("-t only supported with -l");
1727
1728         if (dump_only) {
1729                 struct module_command *commands = NULL;
1730                 struct module_options *modoptions = NULL;
1731                 struct module_alias *aliases = NULL;
1732                 struct module_blacklist *blacklist = NULL;
1733
1734                 read_toplevel_config(config, "", 1, 0,
1735                              &modoptions, &commands, &aliases, &blacklist);
1736                 read_kcmdline(1, &modoptions);
1737                 if (use_binary_indexes) {
1738                         read_config_file_bin(aliasfilename, "", 1, 0,
1739                              &modoptions, &commands, &aliases, &blacklist);
1740                         read_config_file_bin(symfilename, "", 1, 0,
1741                              &modoptions, &commands, &aliases, &blacklist);
1742                 } else {
1743                         read_config(aliasfilename, "", 1, 0,
1744                              &modoptions, &commands, &aliases, &blacklist);
1745                         read_config(symfilename, "", 1, 0,
1746                              &modoptions, &commands, &aliases, &blacklist);
1747                 }
1748                 exit(0);
1749         }
1750
1751         if (remove || all) {
1752                 num_modules = argc - optind;
1753                 optstring = NOFAIL(strdup(""));
1754         } else {
1755                 num_modules = 1;
1756                 optstring = gather_options(argv+optind+1);
1757         }
1758
1759         /* num_modules is always 1 except for -r or -a. */
1760         for (i = 0; i < num_modules; i++) {
1761                 struct module_command *commands = NULL;
1762                 struct module_options *modoptions = NULL;
1763                 struct module_alias *aliases = NULL;
1764                 struct module_blacklist *blacklist = NULL;
1765                 LIST_HEAD(list);
1766                 char *modulearg = argv[optind + i];
1767
1768                 if (dump_modver) {
1769                         dump_modversions(modulearg, error);
1770                         continue;
1771                 }
1772
1773                 /* Convert name we are looking for */
1774                 underscores(modulearg);
1775
1776                 /* Returns the resolved alias, options */
1777                 read_toplevel_config(config, modulearg, 0,
1778                      remove, &modoptions, &commands, &aliases, &blacklist);
1779
1780                 /* Read module options from kernel command line */
1781                 read_kcmdline(0, &modoptions);
1782
1783                 /* No luck?  Try symbol names, if starts with symbol:. */
1784                 if (!aliases
1785                     && strncmp(modulearg, "symbol:", strlen("symbol:")) == 0) {
1786                         if (use_binary_indexes)
1787                                 read_config_file_bin(symfilename, modulearg, 0,
1788                                         remove, &modoptions, &commands,
1789                                         &aliases, &blacklist);
1790                         else
1791                                 read_config(symfilename, modulearg, 0,
1792                                         remove, &modoptions, &commands,
1793                                         &aliases, &blacklist);
1794                 }
1795                 if (!aliases) {
1796                         if(!strchr(modulearg, ':'))
1797                                 read_depends(dirname, modulearg, &list);
1798
1799                         /* We only use canned aliases as last resort. */
1800                         if (list_empty(&list)
1801                             && !find_command(modulearg, commands))
1802                         {
1803                                 if (use_binary_indexes)
1804                                         read_config_file_bin(aliasfilename,
1805                                                 modulearg, 0, remove,
1806                                                 &modoptions, &commands,
1807                                                 &aliases, &blacklist);
1808                                 else
1809                                         read_config(aliasfilename,
1810                                                 modulearg, 0, remove,
1811                                                 &modoptions, &commands,
1812                                                 &aliases, &blacklist);
1813                         }
1814                 }
1815
1816                 aliases = apply_blacklist(aliases, blacklist);
1817                 if (aliases) {
1818                         errfn_t err = error;
1819
1820                         /* More than one alias?  Don't bail out on failure. */
1821                         if (aliases->next)
1822                                 err = warn;
1823                         while (aliases) {
1824                                 /* Add the options for this alias. */
1825                                 char *opts = NOFAIL(strdup(optstring));
1826                                 opts = add_extra_options(modulearg,
1827                                                          opts, modoptions);
1828
1829                                 read_depends(dirname, aliases->module, &list);
1830                                 handle_module(aliases->module, &list, newname,
1831                                               remove, opts, first_time, err,
1832                                               dry_run, verbose, modoptions,
1833                                               commands, ignore_commands,
1834                                               ignore_proc, strip_vermagic,
1835                                               strip_modversion,
1836                                               unknown_silent,
1837                                               optstring, flags);
1838
1839                                 aliases = aliases->next;
1840                                 INIT_LIST_HEAD(&list);
1841                         }
1842                 } else {
1843                         if (use_blacklist
1844                             && find_blacklist(modulearg, blacklist))
1845                                 continue;
1846
1847                         handle_module(modulearg, &list, newname, remove,
1848                                       optstring, first_time, error, dry_run,
1849                                       verbose, modoptions, commands,
1850                                       ignore_commands, ignore_proc,
1851                                       strip_vermagic, strip_modversion,
1852                                       unknown_silent, optstring, flags);
1853                 }
1854         }
1855         if (logging)
1856                 closelog();
1857
1858         free(dirname);
1859         free(aliasfilename);
1860         free(symfilename);
1861         free(optstring);
1862
1863         return 0;
1864 }