tools/modprobe.c

   1 /*
   2  * kmod-modprobe - manage linux kernel modules using libkmod.
   3  *
   4  * Copyright (C) 2011-2013  ProFUSION embedded systems
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <assert.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <stdbool.h>
  24 #include <getopt.h>
  25 #include <errno.h>
  26 #include <string.h>
  27 #include <sys/types.h>
  28 #include <sys/stat.h>
  29 #include <sys/utsname.h>
  30 #include <sys/wait.h>
  31 #include <unistd.h>
  32 #include <limits.h>
  33
  34 #include "libkmod.h"
  35 #include "libkmod-array.h"
  36 #include "macro.h"
  37
  38 #include "kmod.h"
  39
  40 static int log_priority = LOG_CRIT;
  41 static int use_syslog = 0;
  42 #define LOG(...) log_printf(log_priority, __VA_ARGS__)
  43
  44 #define DEFAULT_VERBOSE LOG_WARNING
  45 static int verbose = DEFAULT_VERBOSE;
  46 static int do_show = 0;
  47 static int dry_run = 0;
  48 static int ignore_loaded = 0;
  49 static int lookup_only = 0;
  50 static int first_time = 0;
  51 static int ignore_commands = 0;
  52 static int use_blacklist = 0;
  53 static int force = 0;
  54 static int strip_modversion = 0;
  55 static int strip_vermagic = 0;
  56 static int remove_dependencies = 0;
  57 static int quiet_inuse = 0;
  58
  59 static const char cmdopts_s[] = "arRibfDcnC:d:S:sqvVh";
  60 static const struct option cmdopts[] = {
  61         {"all", no_argument, 0, 'a'},
  62         {"remove", no_argument, 0, 'r'},
  63         {"remove-dependencies", no_argument, 0, 5},
  64         {"resolve-alias", no_argument, 0, 'R'},
  65         {"first-time", no_argument, 0, 3},
  66         {"ignore-install", no_argument, 0, 'i'},
  67         {"ignore-remove", no_argument, 0, 'i'},
  68         {"use-blacklist", no_argument, 0, 'b'},
  69         {"force", no_argument, 0, 'f'},
  70         {"force-modversion", no_argument, 0, 2},
  71         {"force-vermagic", no_argument, 0, 1},
  72
  73         {"show-depends", no_argument, 0, 'D'},
  74         {"showconfig", no_argument, 0, 'c'},
  75         {"show-config", no_argument, 0, 'c'},
  76         {"show-modversions", no_argument, 0, 4},
  77         {"dump-modversions", no_argument, 0, 4},
  78
  79         {"dry-run", no_argument, 0, 'n'},
  80         {"show", no_argument, 0, 'n'},
  81
  82         {"config", required_argument, 0, 'C'},
  83         {"dirname", required_argument, 0, 'd'},
  84         {"set-version", required_argument, 0, 'S'},
  85
  86         {"syslog", no_argument, 0, 's'},
  87         {"quiet", no_argument, 0, 'q'},
  88         {"verbose", no_argument, 0, 'v'},
  89         {"version", no_argument, 0, 'V'},
  90         {"help", no_argument, 0, 'h'},
  91         {NULL, 0, 0, 0}
  92 };
  93
  94 static void help(void)
  95 {
  96         printf("Usage:\n"
  97                 "\t%s [options] [-i] [-b] modulename\n"
  98                 "\t%s [options] -a [-i] [-b] modulename [modulename...]\n"
  99                 "\t%s [options] -r [-i] modulename\n"
 100                 "\t%s [options] -r -a [-i] modulename [modulename...]\n"
 101                 "\t%s [options] -c\n"
 102                 "\t%s [options] --dump-modversions filename\n"
 103                 "Management Options:\n"
 104                 "\t-a, --all                   Consider every non-argument to\n"
 105                 "\t                            be a module name to be inserted\n"
 106                 "\t                            or removed (-r)\n"
 107                 "\t-r, --remove                Remove modules instead of inserting\n"
 108                 "\t    --remove-dependencies   Also remove modules depending on it\n"
 109                 "\t-R, --resolve-alias         Only lookup and print alias and exit\n"
 110                 "\t    --first-time            Fail if module already inserted or removed\n"
 111                 "\t-i, --ignore-install        Ignore install commands\n"
 112                 "\t-i, --ignore-remove         Ignore remove commands\n"
 113                 "\t-b, --use-blacklist         Apply blacklist to resolved alias.\n"
 114                 "\t-f, --force                 Force module insertion or removal.\n"
 115                 "\t                            implies --force-modversions and\n"
 116                 "\t                            --force-vermagic\n"
 117                 "\t    --force-modversion      Ignore module's version\n"
 118                 "\t    --force-vermagic        Ignore module's version magic\n"
 119                 "\n"
 120                 "Query Options:\n"
 121                 "\t-D, --show-depends          Only print module dependencies and exit\n"
 122                 "\t-c, --showconfig            Print out known configuration and exit\n"
 123                 "\t-c, --show-config           Same as --showconfig\n"
 124                 "\t    --show-modversions      Dump module symbol version and exit\n"
 125                 "\t    --dump-modversions      Same as --show-modversions\n"
 126                 "\n"
 127                 "General Options:\n"
 128                 "\t-n, --dry-run               Do not execute operations, just print out\n"
 129                 "\t-n, --show                  Same as --dry-run\n"
 130
 131                 "\t-C, --config=FILE           Use FILE instead of default search paths\n"
 132                 "\t-d, --dirname=DIR           Use DIR as filesystem root for /lib/modules\n"
 133                 "\t-S, --set-version=VERSION   Use VERSION instead of `uname -r`\n"
 134
 135                 "\t-s, --syslog                print to syslog, not stderr\n"
 136                 "\t-q, --quiet                 disable messages\n"
 137                 "\t-v, --verbose               enables more messages\n"
 138                 "\t-V, --version               show version\n"
 139                 "\t-h, --help                  show this help\n",
 140                 program_invocation_short_name, program_invocation_short_name,
 141                 program_invocation_short_name, program_invocation_short_name,
 142                 program_invocation_short_name, program_invocation_short_name);
 143 }
 144
 145 static inline void _show(const char *fmt, ...)
 146 {
 147         va_list args;
 148
 149         if (!do_show && verbose <= DEFAULT_VERBOSE)
 150                 return;
 151
 152         va_start(args, fmt);
 153         vfprintf(stdout, fmt, args);
 154         fflush(stdout);
 155         va_end(args);
 156 }
 157 #define SHOW(...) _show(__VA_ARGS__)
 158
 159 static int show_config(struct kmod_ctx *ctx)
 160 {
 161         struct config_iterators {
 162                 const char *name;
 163                 struct kmod_config_iter *(*get_iter)(const struct kmod_ctx *ctx);
 164         } ci[] = {
 165                 { "blacklist", kmod_config_get_blacklists },
 166                 { "install", kmod_config_get_install_commands },
 167                 { "remove", kmod_config_get_remove_commands },
 168                 { "alias", kmod_config_get_aliases },
 169                 { "options", kmod_config_get_options },
 170                 { "softdep", kmod_config_get_softdeps },
 171         };
 172         size_t i;
 173
 174         for (i = 0;  i < ARRAY_SIZE(ci); i++) {
 175                 struct kmod_config_iter *iter = ci[i].get_iter(ctx);
 176
 177                 if (iter == NULL)
 178                         continue;
 179
 180                 while (kmod_config_iter_next(iter)) {
 181                         const char *val;
 182
 183                         printf("%s %s", ci[i].name,
 184                                         kmod_config_iter_get_key(iter));
 185                         val = kmod_config_iter_get_value(iter);
 186                         if (val != NULL) {
 187                                 putchar(' ');
 188                                 puts(val);
 189                         } else
 190                                 putchar('\n');
 191                 }
 192
 193                 kmod_config_iter_free_iter(iter);
 194         }
 195
 196         puts("\n# End of configuration files. Dumping indexes now:\n");
 197         fflush(stdout);
 198
 199         kmod_dump_index(ctx, KMOD_INDEX_MODULES_ALIAS, STDOUT_FILENO);
 200         kmod_dump_index(ctx, KMOD_INDEX_MODULES_SYMBOL, STDOUT_FILENO);
 201
 202         return 0;
 203 }
 204
 205 static int show_modversions(struct kmod_ctx *ctx, const char *filename)
 206 {
 207         struct kmod_list *l, *list = NULL;
 208         struct kmod_module *mod;
 209         int err = kmod_module_new_from_path(ctx, filename, &mod);
 210         if (err < 0) {
 211                 LOG("Module %s not found.\n", filename);
 212                 return err;
 213         }
 214
 215         err = kmod_module_get_versions(mod, &list);
 216         if (err < 0) {
 217                 LOG("could not get modversions of %s: %s\n",
 218                         filename, strerror(-err));
 219                 kmod_module_unref(mod);
 220                 return err;
 221         }
 222
 223         kmod_list_foreach(l, list) {
 224                 const char *symbol = kmod_module_version_get_symbol(l);
 225                 uint64_t crc = kmod_module_version_get_crc(l);
 226                 printf("0x%08"PRIx64"\t%s\n", crc, symbol);
 227         }
 228         kmod_module_versions_free_list(list);
 229         kmod_module_unref(mod);
 230         return 0;
 231 }
 232
 233 static int command_do(struct kmod_module *module, const char *type,
 234                                 const char *command, const char *cmdline_opts)
 235 {
 236         const char *modname = kmod_module_get_name(module);
 237         char *p, *cmd = NULL;
 238         size_t cmdlen, cmdline_opts_len, varlen;
 239         int ret = 0;
 240
 241         if (cmdline_opts == NULL)
 242                 cmdline_opts = "";
 243         cmdline_opts_len = strlen(cmdline_opts);
 244
 245         cmd = strdup(command);
 246         if (cmd == NULL)
 247                 return -ENOMEM;
 248         cmdlen = strlen(cmd);
 249         varlen = sizeof("$CMDLINE_OPTS") - 1;
 250         while ((p = strstr(cmd, "$CMDLINE_OPTS")) != NULL) {
 251                 size_t prefixlen = p - cmd;
 252                 size_t suffixlen = cmdlen - prefixlen - varlen;
 253                 size_t slen = cmdlen - varlen + cmdline_opts_len;
 254                 char *suffix = p + varlen;
 255                 char *s = malloc(slen + 1);
 256                 if (s == NULL) {
 257                         free(cmd);
 258                         return -ENOMEM;
 259                 }
 260                 memcpy(s, cmd, p - cmd);
 261                 memcpy(s + prefixlen, cmdline_opts, cmdline_opts_len);
 262                 memcpy(s + prefixlen + cmdline_opts_len, suffix, suffixlen);
 263                 s[slen] = '\0';
 264
 265                 free(cmd);
 266                 cmd = s;
 267                 cmdlen = slen;
 268         }
 269
 270         SHOW("%s %s\n", type, cmd);
 271         if (dry_run)
 272                 goto end;
 273
 274         setenv("MODPROBE_MODULE", modname, 1);
 275         ret = system(cmd);
 276         unsetenv("MODPROBE_MODULE");
 277         if (ret == -1 || WEXITSTATUS(ret)) {
 278                 LOG("Error running %s command for %s\n", type, modname);
 279                 if (ret != -1)
 280                         ret = -WEXITSTATUS(ret);
 281         }
 282
 283 end:
 284         free(cmd);
 285         return ret;
 286 }
 287
 288 static int rmmod_do_remove_module(struct kmod_module *mod)
 289 {
 290         const char *modname = kmod_module_get_name(mod);
 291         struct kmod_list *deps, *itr;
 292         int flags = 0, err;
 293
 294         SHOW("rmmod %s\n", kmod_module_get_name(mod));
 295
 296         if (dry_run)
 297                 return 0;
 298
 299         if (force)
 300                 flags |= KMOD_REMOVE_FORCE;
 301
 302         err = kmod_module_remove_module(mod, flags);
 303         if (err == -EEXIST) {
 304                 if (!first_time)
 305                         err = 0;
 306                 else
 307                         LOG("Module %s is not in kernel.\n", modname);
 308         }
 309
 310         deps = kmod_module_get_dependencies(mod);
 311         if (deps != NULL) {
 312                 kmod_list_foreach(itr, deps) {
 313                         struct kmod_module *dep = kmod_module_get_module(itr);
 314                         if (kmod_module_get_refcnt(dep) == 0)
 315                                 rmmod_do_remove_module(dep);
 316                         kmod_module_unref(dep);
 317                 }
 318                 kmod_module_unref_list(deps);
 319         }
 320
 321         return err;
 322 }
 323
 324 static int rmmod_do_module(struct kmod_module *mod, bool do_dependencies);
 325
 326 static int rmmod_do_deps_list(struct kmod_list *list, bool stop_on_errors)
 327 {
 328         struct kmod_list *l;
 329
 330         kmod_list_foreach_reverse(l, list) {
 331                 struct kmod_module *m = kmod_module_get_module(l);
 332                 int r = rmmod_do_module(m, false);
 333                 kmod_module_unref(m);
 334
 335                 if (r < 0 && stop_on_errors)
 336                         return r;
 337         }
 338
 339         return 0;
 340 }
 341
 342 static int rmmod_do_module(struct kmod_module *mod, bool do_dependencies)
 343 {
 344         const char *modname = kmod_module_get_name(mod);
 345         struct kmod_list *pre = NULL, *post = NULL;
 346         const char *cmd = NULL;
 347         int err;
 348
 349         if (!ignore_commands) {
 350                 err = kmod_module_get_softdeps(mod, &pre, &post);
 351                 if (err < 0) {
 352                         WRN("could not get softdeps of '%s': %s\n",
 353                                                 modname, strerror(-err));
 354                         return err;
 355                 }
 356
 357                 cmd = kmod_module_get_remove_commands(mod);
 358         }
 359
 360         if (cmd == NULL && !ignore_loaded) {
 361                 int state = kmod_module_get_initstate(mod);
 362
 363                 if (state < 0) {
 364                         if (first_time) {
 365                                 LOG("Module %s is not in kernel.\n", modname);
 366                                 err = -ENOENT;
 367                         } else {
 368                                 err = 0;
 369                         }
 370                         goto error;
 371                 } else if (state == KMOD_MODULE_BUILTIN) {
 372                         LOG("Module %s is builtin.\n", modname);
 373                         err = -ENOENT;
 374                         goto error;
 375                 }
 376         }
 377
 378         rmmod_do_deps_list(post, false);
 379
 380         if (do_dependencies && remove_dependencies) {
 381                 struct kmod_list *deps = kmod_module_get_dependencies(mod);
 382
 383                 err = rmmod_do_deps_list(deps, true);
 384                 if (err < 0)
 385                         goto error;
 386         }
 387
 388         if (!ignore_loaded) {
 389                 int usage = kmod_module_get_refcnt(mod);
 390
 391                 if (usage > 0) {
 392                         if (!quiet_inuse)
 393                                 LOG("Module %s is in use.\n", modname);
 394
 395                         err = -EBUSY;
 396                         goto error;
 397                 }
 398         }
 399
 400         if (cmd == NULL)
 401                 err = rmmod_do_remove_module(mod);
 402         else
 403                 err = command_do(mod, "remove", cmd, NULL);
 404
 405         if (err < 0)
 406                 goto error;
 407
 408         rmmod_do_deps_list(pre, false);
 409
 410 error:
 411         kmod_module_unref_list(pre);
 412         kmod_module_unref_list(post);
 413
 414         return err;
 415 }
 416
 417 static int rmmod(struct kmod_ctx *ctx, const char *alias)
 418 {
 419         struct kmod_list *l, *list = NULL;
 420         int err;
 421
 422         err = kmod_module_new_from_lookup(ctx, alias, &list);
 423         if (err < 0)
 424                 return err;
 425
 426         if (list == NULL) {
 427                 LOG("Module %s not found.\n", alias);
 428                 err = -ENOENT;
 429         }
 430
 431         kmod_list_foreach(l, list) {
 432                 struct kmod_module *mod = kmod_module_get_module(l);
 433                 err = rmmod_do_module(mod, true);
 434                 kmod_module_unref(mod);
 435                 if (err < 0)
 436                         break;
 437         }
 438
 439         kmod_module_unref_list(list);
 440         return err;
 441 }
 442
 443 static int rmmod_all(struct kmod_ctx *ctx, char **args, int nargs)
 444 {
 445         int i, err = 0;
 446
 447         for (i = 0; i < nargs; i++) {
 448                 int r = rmmod(ctx, args[i]);
 449                 if (r < 0)
 450                         err = r;
 451         }
 452
 453         return err;
 454 }
 455
 456 static int handle_failed_lookup(struct kmod_ctx *ctx, const char *alias)
 457 {
 458         struct kmod_module *mod;
 459         int state, err;
 460
 461         DBG("lookup failed - trying to check if it's builtin\n");
 462
 463         err = kmod_module_new_from_name(ctx, alias, &mod);
 464         if (err < 0)
 465                 return err;
 466
 467         state = kmod_module_get_initstate(mod);
 468         kmod_module_unref(mod);
 469
 470         if (state != KMOD_MODULE_BUILTIN) {
 471                 LOG("Module %s not found.\n", alias);
 472                 return -ENOENT;
 473         }
 474
 475         if (first_time) {
 476                 LOG("Module %s already in kernel (builtin).\n", alias);
 477                 return -ENOENT;
 478         }
 479
 480         SHOW("builtin %s\n", alias);
 481         return 0;
 482 }
 483
 484 static void print_action(struct kmod_module *m, bool install,
 485                                                         const char *options)
 486 {
 487         const char *path;
 488
 489         if (install) {
 490                 printf("install %s %s\n", kmod_module_get_install_commands(m),
 491                                                                 options);
 492                 return;
 493         }
 494
 495         path = kmod_module_get_path(m);
 496
 497         if (path == NULL) {
 498                 assert(kmod_module_get_initstate(m) == KMOD_MODULE_BUILTIN);
 499                 printf("builtin %s\n", kmod_module_get_name(m));
 500         } else
 501                 printf("insmod %s %s\n", kmod_module_get_path(m), options);
 502 }
 503
 504 static int insmod(struct kmod_ctx *ctx, const char *alias,
 505                                                 const char *extra_options)
 506 {
 507         struct kmod_list *l, *list = NULL;
 508         int err, flags = 0;
 509
 510         void (*show)(struct kmod_module *m, bool install,
 511                                                 const char *options) = NULL;
 512
 513         err = kmod_module_new_from_lookup(ctx, alias, &list);
 514         if (err < 0)
 515                 return err;
 516
 517         if (list == NULL)
 518                 return handle_failed_lookup(ctx, alias);
 519
 520         if (strip_modversion || force)
 521                 flags |= KMOD_PROBE_FORCE_MODVERSION;
 522         if (strip_vermagic || force)
 523                 flags |= KMOD_PROBE_FORCE_VERMAGIC;
 524         if (ignore_commands)
 525                 flags |= KMOD_PROBE_IGNORE_COMMAND;
 526         if (ignore_loaded)
 527                 flags |= KMOD_PROBE_IGNORE_LOADED;
 528         if (dry_run)
 529                 flags |= KMOD_PROBE_DRY_RUN;
 530         if (do_show || verbose > DEFAULT_VERBOSE)
 531                 show = &print_action;
 532
 533         flags |= KMOD_PROBE_APPLY_BLACKLIST_ALIAS_ONLY;
 534
 535         if (use_blacklist)
 536                 flags |= KMOD_PROBE_APPLY_BLACKLIST;
 537         if (first_time)
 538                 flags |= KMOD_PROBE_FAIL_ON_LOADED;
 539
 540         kmod_list_foreach(l, list) {
 541                 struct kmod_module *mod = kmod_module_get_module(l);
 542
 543                 if (lookup_only)
 544                         printf("%s\n", kmod_module_get_name(mod));
 545                 else {
 546                         err = kmod_module_probe_insert_module(mod, flags,
 547                                         extra_options, NULL, NULL, show);
 548                 }
 549
 550                 if (err >= 0)
 551                         /* ignore flag return values such as a mod being blacklisted */
 552                         err = 0;
 553                 else {
 554                         switch (err) {
 555                         case -EEXIST:
 556                                 ERR("could not insert '%s': Module already in kernel\n",
 557                                                         kmod_module_get_name(mod));
 558                                 break;
 559                         case -ENOENT:
 560                                 ERR("could not insert '%s': Unknown symbol in module, "
 561                                                 "or unknown parameter (see dmesg)\n",
 562                                                 kmod_module_get_name(mod));
 563                                 break;
 564                         default:
 565                                 ERR("could not insert '%s': %s\n",
 566                                                 kmod_module_get_name(mod),
 567                                                 strerror(-err));
 568                                 break;
 569                         }
 570                 }
 571
 572                 kmod_module_unref(mod);
 573         }
 574
 575         kmod_module_unref_list(list);
 576         return err;
 577 }
 578
 579 static int insmod_all(struct kmod_ctx *ctx, char **args, int nargs)
 580 {
 581         int i, err = 0;
 582
 583         for (i = 0; i < nargs; i++) {
 584                 int r = insmod(ctx, args[i], NULL);
 585                 if (r < 0)
 586                         err = r;
 587         }
 588
 589         return err;
 590 }
 591
 592 static void env_modprobe_options_append(const char *value)
 593 {
 594         const char *old = getenv("MODPROBE_OPTIONS");
 595         char *env;
 596
 597         if (old == NULL) {
 598                 setenv("MODPROBE_OPTIONS", value, 1);
 599                 return;
 600         }
 601
 602         if (asprintf(&env, "%s %s", old, value) < 0) {
 603                 ERR("could not append value to $MODPROBE_OPTIONS\n");
 604                 return;
 605         }
 606
 607         if (setenv("MODPROBE_OPTIONS", env, 1) < 0)
 608                 ERR("could not setenv(MODPROBE_OPTIONS, \"%s\")\n", env);
 609         free(env);
 610 }
 611
 612 static int options_from_array(char **args, int nargs, char **output)
 613 {
 614         char *opts = NULL;
 615         size_t optslen = 0;
 616         int i, err = 0;
 617
 618         for (i = 1; i < nargs; i++) {
 619                 size_t len = strlen(args[i]);
 620                 size_t qlen = 0;
 621                 const char *value;
 622                 void *tmp;
 623
 624                 value = strchr(args[i], '=');
 625                 if (value) {
 626                         value++;
 627                         if (*value != '"' && *value != '\'') {
 628                                 if (strchr(value, ' '))
 629                                         qlen = 2;
 630                         }
 631                 }
 632
 633                 tmp = realloc(opts, optslen + len + qlen + 2);
 634                 if (!tmp) {
 635                         err = -errno;
 636                         free(opts);
 637                         opts = NULL;
 638                         ERR("could not gather module options: out-of-memory\n");
 639                         break;
 640                 }
 641                 opts = tmp;
 642                 if (optslen > 0) {
 643                         opts[optslen] = ' ';
 644                         optslen++;
 645                 }
 646                 if (qlen == 0) {
 647                         memcpy(opts + optslen, args[i], len + 1);
 648                         optslen += len;
 649                 } else {
 650                         size_t keylen = value - args[i];
 651                         size_t valuelen = len - keylen;
 652                         memcpy(opts + optslen, args[i], keylen);
 653                         optslen += keylen;
 654                         opts[optslen] = '"';
 655                         optslen++;
 656                         memcpy(opts + optslen, value, valuelen);
 657                         optslen += valuelen;
 658                         opts[optslen] = '"';
 659                         optslen++;
 660                         opts[optslen] = '\0';
 661                 }
 662         }
 663
 664         *output = opts;
 665         return err;
 666 }
 667
 668 static char **prepend_options_from_env(int *p_argc, char **orig_argv)
 669 {
 670         const char *p, *env = getenv("MODPROBE_OPTIONS");
 671         char **new_argv, *str_start, *str_end, *str, *s, *quote;
 672         int i, argc = *p_argc;
 673         size_t envlen, space_count = 0;
 674
 675         if (env == NULL)
 676                 return orig_argv;
 677
 678         for (p = env; *p != '\0'; p++) {
 679                 if (*p == ' ')
 680                         space_count++;
 681         }
 682
 683         envlen = p - env;
 684         new_argv = malloc(sizeof(char *) * (argc + space_count + 3 + envlen));
 685         if (new_argv == NULL)
 686                 return NULL;
 687
 688         new_argv[0] = orig_argv[0];
 689         str_start = str = (char *) (new_argv + argc + space_count + 3);
 690         memcpy(str, env, envlen + 1);
 691
 692         str_end = str_start + envlen;
 693
 694         quote = NULL;
 695         for (i = 1, s = str; *s != '\0'; s++) {
 696                 if (quote == NULL) {
 697                         if (*s == ' ') {
 698                                 new_argv[i] = str;
 699                                 i++;
 700                                 *s = '\0';
 701                                 str = s + 1;
 702                         } else if (*s == '"' || *s == '\'')
 703                                 quote = s;
 704                 } else {
 705                         if (*s == *quote) {
 706                                 if (quote == str) {
 707                                         new_argv[i] = str + 1;
 708                                         i++;
 709                                         *s = '\0';
 710                                         str = s + 1;
 711                                 } else {
 712                                         char *it;
 713                                         for (it = quote; it < s - 1; it++)
 714                                                 it[0] = it[1];
 715                                         for (it = s - 1; it < str_end - 2; it++)
 716                                                 it[0] = it[2];
 717                                         str_end -= 2;
 718                                         *str_end = '\0';
 719                                         s -= 2;
 720                                 }
 721                                 quote = NULL;
 722                         }
 723                 }
 724         }
 725         if (str < s) {
 726                 new_argv[i] = str;
 727                 i++;
 728         }
 729
 730         memcpy(new_argv + i, orig_argv + 1, sizeof(char *) * (argc - 1));
 731         new_argv[i + argc] = NULL;
 732         *p_argc = i + argc - 1;
 733
 734         return new_argv;
 735 }
 736
 737 static int do_modprobe(int argc, char **orig_argv)
 738 {
 739         struct kmod_ctx *ctx;
 740         char **args = NULL, **argv;
 741         const char **config_paths = NULL;
 742         int nargs = 0, n_config_paths = 0;
 743         char dirname_buf[PATH_MAX];
 744         const char *dirname = NULL;
 745         const char *root = NULL;
 746         const char *kversion = NULL;
 747         int use_all = 0;
 748         int do_remove = 0;
 749         int do_show_config = 0;
 750         int do_show_modversions = 0;
 751         int err;
 752
 753         argv = prepend_options_from_env(&argc, orig_argv);
 754         if (argv == NULL) {
 755                 ERR("Could not prepend options from command line\n");
 756                 return EXIT_FAILURE;
 757         }
 758
 759         for (;;) {
 760                 int c, idx = 0;
 761                 c = getopt_long(argc, argv, cmdopts_s, cmdopts, &idx);
 762                 if (c == -1)
 763                         break;
 764                 switch (c) {
 765                 case 'a':
 766                         log_priority = LOG_WARNING;
 767                         use_all = 1;
 768                         break;
 769                 case 'r':
 770                         do_remove = 1;
 771                         break;
 772                 case 5:
 773                         remove_dependencies = 1;
 774                         break;
 775                 case 'R':
 776                         lookup_only = 1;
 777                         break;
 778                 case 3:
 779                         first_time = 1;
 780                         break;
 781                 case 'i':
 782                         ignore_commands = 1;
 783                         break;
 784                 case 'b':
 785                         use_blacklist = 1;
 786                         break;
 787                 case 'f':
 788                         force = 1;
 789                         break;
 790                 case 2:
 791                         strip_modversion = 1;
 792                         break;
 793                 case 1:
 794                         strip_vermagic = 1;
 795                         break;
 796                 case 'D':
 797                         ignore_loaded = 1;
 798                         dry_run = 1;
 799                         do_show = 1;
 800                         break;
 801                 case 'c':
 802                         do_show_config = 1;
 803                         break;
 804                 case 4:
 805                         do_show_modversions = 1;
 806                         break;
 807                 case 'n':
 808                         dry_run = 1;
 809                         break;
 810                 case 'C': {
 811                         size_t bytes = sizeof(char *) * (n_config_paths + 2);
 812                         void *tmp = realloc(config_paths, bytes);
 813                         if (!tmp) {
 814                                 ERR("out-of-memory\n");
 815                                 err = -1;
 816                                 goto done;
 817                         }
 818                         config_paths = tmp;
 819                         config_paths[n_config_paths] = optarg;
 820                         n_config_paths++;
 821                         config_paths[n_config_paths] = NULL;
 822
 823                         env_modprobe_options_append("-C");
 824                         env_modprobe_options_append(optarg);
 825                         break;
 826                 }
 827                 case 'd':
 828                         root = optarg;
 829                         break;
 830                 case 'S':
 831                         kversion = optarg;
 832                         break;
 833                 case 's':
 834                         env_modprobe_options_append("-s");
 835                         use_syslog = 1;
 836                         break;
 837                 case 'q':
 838                         env_modprobe_options_append("-q");
 839                         verbose = LOG_EMERG;
 840                         break;
 841                 case 'v':
 842                         env_modprobe_options_append("-v");
 843                         verbose++;
 844                         break;
 845                 case 'V':
 846                         puts(PACKAGE " version " VERSION);
 847                         err = 0;
 848                         goto done;
 849                 case 'h':
 850                         help();
 851                         err = 0;
 852                         goto done;
 853                 case '?':
 854                         err = -1;
 855                         goto done;
 856                 default:
 857                         ERR("unexpected getopt_long() value '%c'.\n", c);
 858                         err = -1;
 859                         goto done;
 860                 }
 861         }
 862
 863         args = argv + optind;
 864         nargs = argc - optind;
 865
 866         log_open(use_syslog);
 867
 868         if (!do_show_config) {
 869                 if (nargs == 0) {
 870                         ERR("missing parameters. See -h.\n");
 871                         err = -1;
 872                         goto done;
 873                 }
 874         }
 875
 876         if (root != NULL || kversion != NULL) {
 877                 struct utsname u;
 878                 if (root == NULL)
 879                         root = "";
 880                 if (kversion == NULL) {
 881                         if (uname(&u) < 0) {
 882                                 ERR("uname() failed: %m\n");
 883                                 err = -1;
 884                                 goto done;
 885                         }
 886                         kversion = u.release;
 887                 }
 888                 snprintf(dirname_buf, sizeof(dirname_buf),
 889                                 "%s/lib/modules/%s", root,
 890                                 kversion);
 891                 dirname = dirname_buf;
 892         }
 893
 894         ctx = kmod_new(dirname, config_paths);
 895         if (!ctx) {
 896                 ERR("kmod_new() failed!\n");
 897                 err = -1;
 898                 goto done;
 899         }
 900
 901         log_setup_kmod_log(ctx, verbose);
 902
 903         kmod_load_resources(ctx);
 904
 905         if (do_show_config)
 906                 err = show_config(ctx);
 907         else if (do_show_modversions)
 908                 err = show_modversions(ctx, args[0]);
 909         else if (do_remove)
 910                 err = rmmod_all(ctx, args, nargs);
 911         else if (use_all)
 912                 err = insmod_all(ctx, args, nargs);
 913         else {
 914                 char *opts;
 915                 err = options_from_array(args, nargs, &opts);
 916                 if (err == 0) {
 917                         err = insmod(ctx, args[0], opts);
 918                         free(opts);
 919                 }
 920         }
 921
 922         kmod_unref(ctx);
 923
 924 done:
 925         log_close();
 926
 927         if (argv != orig_argv)
 928                 free(argv);
 929
 930         free(config_paths);
 931
 932         return err >= 0 ? EXIT_SUCCESS : EXIT_FAILURE;
 933 }
 934
 935 const struct kmod_cmd kmod_cmd_compat_modprobe = {
 936         .name = "modprobe",
 937         .cmd = do_modprobe,
 938         .help = "compat modprobe command",
 939 };