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 _printf_format_(1, 2)
 146 static inline void _show(const char *fmt, ...)
 147 {
 148         va_list args;
 149
 150         if (!do_show && verbose <= DEFAULT_VERBOSE)
 151                 return;
 152
 153         va_start(args, fmt);
 154         vfprintf(stdout, fmt, args);
 155         fflush(stdout);
 156         va_end(args);
 157 }
 158 #define SHOW(...) _show(__VA_ARGS__)
 159
 160 static int show_config(struct kmod_ctx *ctx)
 161 {
 162         struct config_iterators {
 163                 const char *name;
 164                 struct kmod_config_iter *(*get_iter)(const struct kmod_ctx *ctx);
 165         } ci[] = {
 166                 { "blacklist", kmod_config_get_blacklists },
 167                 { "install", kmod_config_get_install_commands },
 168                 { "remove", kmod_config_get_remove_commands },
 169                 { "alias", kmod_config_get_aliases },
 170                 { "options", kmod_config_get_options },
 171                 { "softdep", kmod_config_get_softdeps },
 172         };
 173         size_t i;
 174
 175         for (i = 0;  i < ARRAY_SIZE(ci); i++) {
 176                 struct kmod_config_iter *iter = ci[i].get_iter(ctx);
 177
 178                 if (iter == NULL)
 179                         continue;
 180
 181                 while (kmod_config_iter_next(iter)) {
 182                         const char *val;
 183
 184                         printf("%s %s", ci[i].name,
 185                                         kmod_config_iter_get_key(iter));
 186                         val = kmod_config_iter_get_value(iter);
 187                         if (val != NULL) {
 188                                 putchar(' ');
 189                                 puts(val);
 190                         } else
 191                                 putchar('\n');
 192                 }
 193
 194                 kmod_config_iter_free_iter(iter);
 195         }
 196
 197         puts("\n# End of configuration files. Dumping indexes now:\n");
 198         fflush(stdout);
 199
 200         kmod_dump_index(ctx, KMOD_INDEX_MODULES_ALIAS, STDOUT_FILENO);
 201         kmod_dump_index(ctx, KMOD_INDEX_MODULES_SYMBOL, STDOUT_FILENO);
 202
 203         return 0;
 204 }
 205
 206 static int show_modversions(struct kmod_ctx *ctx, const char *filename)
 207 {
 208         struct kmod_list *l, *list = NULL;
 209         struct kmod_module *mod;
 210         int err = kmod_module_new_from_path(ctx, filename, &mod);
 211         if (err < 0) {
 212                 LOG("Module %s not found.\n", filename);
 213                 return err;
 214         }
 215
 216         err = kmod_module_get_versions(mod, &list);
 217         if (err < 0) {
 218                 LOG("could not get modversions of %s: %s\n",
 219                         filename, strerror(-err));
 220                 kmod_module_unref(mod);
 221                 return err;
 222         }
 223
 224         kmod_list_foreach(l, list) {
 225                 const char *symbol = kmod_module_version_get_symbol(l);
 226                 uint64_t crc = kmod_module_version_get_crc(l);
 227                 printf("0x%08"PRIx64"\t%s\n", crc, symbol);
 228         }
 229         kmod_module_versions_free_list(list);
 230         kmod_module_unref(mod);
 231         return 0;
 232 }
 233
 234 static int command_do(struct kmod_module *module, const char *type,
 235                                 const char *command, const char *cmdline_opts)
 236 {
 237         const char *modname = kmod_module_get_name(module);
 238         char *p, *cmd = NULL;
 239         size_t cmdlen, cmdline_opts_len, varlen;
 240         int ret = 0;
 241
 242         if (cmdline_opts == NULL)
 243                 cmdline_opts = "";
 244         cmdline_opts_len = strlen(cmdline_opts);
 245
 246         cmd = strdup(command);
 247         if (cmd == NULL)
 248                 return -ENOMEM;
 249         cmdlen = strlen(cmd);
 250         varlen = sizeof("$CMDLINE_OPTS") - 1;
 251         while ((p = strstr(cmd, "$CMDLINE_OPTS")) != NULL) {
 252                 size_t prefixlen = p - cmd;
 253                 size_t suffixlen = cmdlen - prefixlen - varlen;
 254                 size_t slen = cmdlen - varlen + cmdline_opts_len;
 255                 char *suffix = p + varlen;
 256                 char *s = malloc(slen + 1);
 257                 if (s == NULL) {
 258                         free(cmd);
 259                         return -ENOMEM;
 260                 }
 261                 memcpy(s, cmd, p - cmd);
 262                 memcpy(s + prefixlen, cmdline_opts, cmdline_opts_len);
 263                 memcpy(s + prefixlen + cmdline_opts_len, suffix, suffixlen);
 264                 s[slen] = '\0';
 265
 266                 free(cmd);
 267                 cmd = s;
 268                 cmdlen = slen;
 269         }
 270
 271         SHOW("%s %s\n", type, cmd);
 272         if (dry_run)
 273                 goto end;
 274
 275         setenv("MODPROBE_MODULE", modname, 1);
 276         ret = system(cmd);
 277         unsetenv("MODPROBE_MODULE");
 278         if (ret == -1 || WEXITSTATUS(ret)) {
 279                 LOG("Error running %s command for %s\n", type, modname);
 280                 if (ret != -1)
 281                         ret = -WEXITSTATUS(ret);
 282         }
 283
 284 end:
 285         free(cmd);
 286         return ret;
 287 }
 288
 289 static int rmmod_do_remove_module(struct kmod_module *mod)
 290 {
 291         const char *modname = kmod_module_get_name(mod);
 292         struct kmod_list *deps, *itr;
 293         int flags = 0, err;
 294
 295         SHOW("rmmod %s\n", kmod_module_get_name(mod));
 296
 297         if (dry_run)
 298                 return 0;
 299
 300         if (force)
 301                 flags |= KMOD_REMOVE_FORCE;
 302
 303         err = kmod_module_remove_module(mod, flags);
 304         if (err == -EEXIST) {
 305                 if (!first_time)
 306                         err = 0;
 307                 else
 308                         LOG("Module %s is not in kernel.\n", modname);
 309         }
 310
 311         deps = kmod_module_get_dependencies(mod);
 312         if (deps != NULL) {
 313                 kmod_list_foreach(itr, deps) {
 314                         struct kmod_module *dep = kmod_module_get_module(itr);
 315                         if (kmod_module_get_refcnt(dep) == 0)
 316                                 rmmod_do_remove_module(dep);
 317                         kmod_module_unref(dep);
 318                 }
 319                 kmod_module_unref_list(deps);
 320         }
 321
 322         return err;
 323 }
 324
 325 static int rmmod_do_module(struct kmod_module *mod, bool do_dependencies);
 326
 327 static int rmmod_do_deps_list(struct kmod_list *list, bool stop_on_errors)
 328 {
 329         struct kmod_list *l;
 330
 331         kmod_list_foreach_reverse(l, list) {
 332                 struct kmod_module *m = kmod_module_get_module(l);
 333                 int r = rmmod_do_module(m, false);
 334                 kmod_module_unref(m);
 335
 336                 if (r < 0 && stop_on_errors)
 337                         return r;
 338         }
 339
 340         return 0;
 341 }
 342
 343 static int rmmod_do_module(struct kmod_module *mod, bool do_dependencies)
 344 {
 345         const char *modname = kmod_module_get_name(mod);
 346         struct kmod_list *pre = NULL, *post = NULL;
 347         const char *cmd = NULL;
 348         int err;
 349
 350         if (!ignore_commands) {
 351                 err = kmod_module_get_softdeps(mod, &pre, &post);
 352                 if (err < 0) {
 353                         WRN("could not get softdeps of '%s': %s\n",
 354                                                 modname, strerror(-err));
 355                         return err;
 356                 }
 357
 358                 cmd = kmod_module_get_remove_commands(mod);
 359         }
 360
 361         if (cmd == NULL && !ignore_loaded) {
 362                 int state = kmod_module_get_initstate(mod);
 363
 364                 if (state < 0) {
 365                         if (first_time) {
 366                                 LOG("Module %s is not in kernel.\n", modname);
 367                                 err = -ENOENT;
 368                         } else {
 369                                 err = 0;
 370                         }
 371                         goto error;
 372                 } else if (state == KMOD_MODULE_BUILTIN) {
 373                         LOG("Module %s is builtin.\n", modname);
 374                         err = -ENOENT;
 375                         goto error;
 376                 }
 377         }
 378
 379         rmmod_do_deps_list(post, false);
 380
 381         if (do_dependencies && remove_dependencies) {
 382                 struct kmod_list *deps = kmod_module_get_dependencies(mod);
 383
 384                 err = rmmod_do_deps_list(deps, true);
 385                 if (err < 0)
 386                         goto error;
 387         }
 388
 389         if (!ignore_loaded) {
 390                 int usage = kmod_module_get_refcnt(mod);
 391
 392                 if (usage > 0) {
 393                         if (!quiet_inuse)
 394                                 LOG("Module %s is in use.\n", modname);
 395
 396                         err = -EBUSY;
 397                         goto error;
 398                 }
 399         }
 400
 401         if (cmd == NULL)
 402                 err = rmmod_do_remove_module(mod);
 403         else
 404                 err = command_do(mod, "remove", cmd, NULL);
 405
 406         if (err < 0)
 407                 goto error;
 408
 409         rmmod_do_deps_list(pre, false);
 410
 411 error:
 412         kmod_module_unref_list(pre);
 413         kmod_module_unref_list(post);
 414
 415         return err;
 416 }
 417
 418 static int rmmod(struct kmod_ctx *ctx, const char *alias)
 419 {
 420         struct kmod_list *l, *list = NULL;
 421         int err;
 422
 423         err = kmod_module_new_from_lookup(ctx, alias, &list);
 424         if (err < 0)
 425                 return err;
 426
 427         if (list == NULL) {
 428                 LOG("Module %s not found.\n", alias);
 429                 err = -ENOENT;
 430         }
 431
 432         kmod_list_foreach(l, list) {
 433                 struct kmod_module *mod = kmod_module_get_module(l);
 434                 err = rmmod_do_module(mod, true);
 435                 kmod_module_unref(mod);
 436                 if (err < 0)
 437                         break;
 438         }
 439
 440         kmod_module_unref_list(list);
 441         return err;
 442 }
 443
 444 static int rmmod_all(struct kmod_ctx *ctx, char **args, int nargs)
 445 {
 446         int i, err = 0;
 447
 448         for (i = 0; i < nargs; i++) {
 449                 int r = rmmod(ctx, args[i]);
 450                 if (r < 0)
 451                         err = r;
 452         }
 453
 454         return err;
 455 }
 456
 457 static int handle_failed_lookup(struct kmod_ctx *ctx, const char *alias)
 458 {
 459         struct kmod_module *mod;
 460         int state, err;
 461
 462         DBG("lookup failed - trying to check if it's builtin\n");
 463
 464         err = kmod_module_new_from_name(ctx, alias, &mod);
 465         if (err < 0)
 466                 return err;
 467
 468         state = kmod_module_get_initstate(mod);
 469         kmod_module_unref(mod);
 470
 471         if (state != KMOD_MODULE_BUILTIN) {
 472                 LOG("Module %s not found.\n", alias);
 473                 return -ENOENT;
 474         }
 475
 476         if (first_time) {
 477                 LOG("Module %s already in kernel (builtin).\n", alias);
 478                 return -ENOENT;
 479         }
 480
 481         SHOW("builtin %s\n", alias);
 482         return 0;
 483 }
 484
 485 static void print_action(struct kmod_module *m, bool install,
 486                                                         const char *options)
 487 {
 488         const char *path;
 489
 490         if (install) {
 491                 printf("install %s %s\n", kmod_module_get_install_commands(m),
 492                                                                 options);
 493                 return;
 494         }
 495
 496         path = kmod_module_get_path(m);
 497
 498         if (path == NULL) {
 499                 /*
 500                  * Either a builtin module, or an alias, print only for
 501                  * builtin
 502                  */
 503                 if (kmod_module_get_initstate(m) == KMOD_MODULE_BUILTIN)
 504                         printf("builtin %s\n", kmod_module_get_name(m));
 505         } else
 506                 printf("insmod %s %s\n", kmod_module_get_path(m), options);
 507 }
 508
 509 static int insmod(struct kmod_ctx *ctx, const char *alias,
 510                                                 const char *extra_options)
 511 {
 512         struct kmod_list *l, *list = NULL;
 513         int err, flags = 0;
 514
 515         void (*show)(struct kmod_module *m, bool install,
 516                                                 const char *options) = NULL;
 517
 518         err = kmod_module_new_from_lookup(ctx, alias, &list);
 519         if (err < 0)
 520                 return err;
 521
 522         if (list == NULL)
 523                 return handle_failed_lookup(ctx, alias);
 524
 525         if (strip_modversion || force)
 526                 flags |= KMOD_PROBE_FORCE_MODVERSION;
 527         if (strip_vermagic || force)
 528                 flags |= KMOD_PROBE_FORCE_VERMAGIC;
 529         if (ignore_commands)
 530                 flags |= KMOD_PROBE_IGNORE_COMMAND;
 531         if (ignore_loaded)
 532                 flags |= KMOD_PROBE_IGNORE_LOADED;
 533         if (dry_run)
 534                 flags |= KMOD_PROBE_DRY_RUN;
 535         if (do_show || verbose > DEFAULT_VERBOSE)
 536                 show = &print_action;
 537
 538         flags |= KMOD_PROBE_APPLY_BLACKLIST_ALIAS_ONLY;
 539
 540         if (use_blacklist)
 541                 flags |= KMOD_PROBE_APPLY_BLACKLIST;
 542         if (first_time)
 543                 flags |= KMOD_PROBE_FAIL_ON_LOADED;
 544
 545         kmod_list_foreach(l, list) {
 546                 struct kmod_module *mod = kmod_module_get_module(l);
 547
 548                 if (lookup_only)
 549                         printf("%s\n", kmod_module_get_name(mod));
 550                 else {
 551                         err = kmod_module_probe_insert_module(mod, flags,
 552                                         extra_options, NULL, NULL, show);
 553                 }
 554
 555                 if (err >= 0)
 556                         /* ignore flag return values such as a mod being blacklisted */
 557                         err = 0;
 558                 else {
 559                         switch (err) {
 560                         case -EEXIST:
 561                                 ERR("could not insert '%s': Module already in kernel\n",
 562                                                         kmod_module_get_name(mod));
 563                                 break;
 564                         case -ENOENT:
 565                                 ERR("could not insert '%s': Unknown symbol in module, "
 566                                                 "or unknown parameter (see dmesg)\n",
 567                                                 kmod_module_get_name(mod));
 568                                 break;
 569                         default:
 570                                 ERR("could not insert '%s': %s\n",
 571                                                 kmod_module_get_name(mod),
 572                                                 strerror(-err));
 573                                 break;
 574                         }
 575                 }
 576
 577                 kmod_module_unref(mod);
 578         }
 579
 580         kmod_module_unref_list(list);
 581         return err;
 582 }
 583
 584 static int insmod_all(struct kmod_ctx *ctx, char **args, int nargs)
 585 {
 586         int i, err = 0;
 587
 588         for (i = 0; i < nargs; i++) {
 589                 int r = insmod(ctx, args[i], NULL);
 590                 if (r < 0)
 591                         err = r;
 592         }
 593
 594         return err;
 595 }
 596
 597 static void env_modprobe_options_append(const char *value)
 598 {
 599         const char *old = getenv("MODPROBE_OPTIONS");
 600         char *env;
 601
 602         if (old == NULL) {
 603                 setenv("MODPROBE_OPTIONS", value, 1);
 604                 return;
 605         }
 606
 607         if (asprintf(&env, "%s %s", old, value) < 0) {
 608                 ERR("could not append value to $MODPROBE_OPTIONS\n");
 609                 return;
 610         }
 611
 612         if (setenv("MODPROBE_OPTIONS", env, 1) < 0)
 613                 ERR("could not setenv(MODPROBE_OPTIONS, \"%s\")\n", env);
 614         free(env);
 615 }
 616
 617 static int options_from_array(char **args, int nargs, char **output)
 618 {
 619         char *opts = NULL;
 620         size_t optslen = 0;
 621         int i, err = 0;
 622
 623         for (i = 1; i < nargs; i++) {
 624                 size_t len = strlen(args[i]);
 625                 size_t qlen = 0;
 626                 const char *value;
 627                 void *tmp;
 628
 629                 value = strchr(args[i], '=');
 630                 if (value) {
 631                         value++;
 632                         if (*value != '"' && *value != '\'') {
 633                                 if (strchr(value, ' '))
 634                                         qlen = 2;
 635                         }
 636                 }
 637
 638                 tmp = realloc(opts, optslen + len + qlen + 2);
 639                 if (!tmp) {
 640                         err = -errno;
 641                         free(opts);
 642                         opts = NULL;
 643                         ERR("could not gather module options: out-of-memory\n");
 644                         break;
 645                 }
 646                 opts = tmp;
 647                 if (optslen > 0) {
 648                         opts[optslen] = ' ';
 649                         optslen++;
 650                 }
 651                 if (qlen == 0) {
 652                         memcpy(opts + optslen, args[i], len + 1);
 653                         optslen += len;
 654                 } else {
 655                         size_t keylen = value - args[i];
 656                         size_t valuelen = len - keylen;
 657                         memcpy(opts + optslen, args[i], keylen);
 658                         optslen += keylen;
 659                         opts[optslen] = '"';
 660                         optslen++;
 661                         memcpy(opts + optslen, value, valuelen);
 662                         optslen += valuelen;
 663                         opts[optslen] = '"';
 664                         optslen++;
 665                         opts[optslen] = '\0';
 666                 }
 667         }
 668
 669         *output = opts;
 670         return err;
 671 }
 672
 673 static char **prepend_options_from_env(int *p_argc, char **orig_argv)
 674 {
 675         const char *p, *env = getenv("MODPROBE_OPTIONS");
 676         char **new_argv, *str_start, *str_end, *str, *s, *quote;
 677         int i, argc = *p_argc;
 678         size_t envlen, space_count = 0;
 679
 680         if (env == NULL)
 681                 return orig_argv;
 682
 683         for (p = env; *p != '\0'; p++) {
 684                 if (*p == ' ')
 685                         space_count++;
 686         }
 687
 688         envlen = p - env;
 689         new_argv = malloc(sizeof(char *) * (argc + space_count + 3 + envlen));
 690         if (new_argv == NULL)
 691                 return NULL;
 692
 693         new_argv[0] = orig_argv[0];
 694         str_start = str = (char *) (new_argv + argc + space_count + 3);
 695         memcpy(str, env, envlen + 1);
 696
 697         str_end = str_start + envlen;
 698
 699         quote = NULL;
 700         for (i = 1, s = str; *s != '\0'; s++) {
 701                 if (quote == NULL) {
 702                         if (*s == ' ') {
 703                                 new_argv[i] = str;
 704                                 i++;
 705                                 *s = '\0';
 706                                 str = s + 1;
 707                         } else if (*s == '"' || *s == '\'')
 708                                 quote = s;
 709                 } else {
 710                         if (*s == *quote) {
 711                                 if (quote == str) {
 712                                         new_argv[i] = str + 1;
 713                                         i++;
 714                                         *s = '\0';
 715                                         str = s + 1;
 716                                 } else {
 717                                         char *it;
 718                                         for (it = quote; it < s - 1; it++)
 719                                                 it[0] = it[1];
 720                                         for (it = s - 1; it < str_end - 2; it++)
 721                                                 it[0] = it[2];
 722                                         str_end -= 2;
 723                                         *str_end = '\0';
 724                                         s -= 2;
 725                                 }
 726                                 quote = NULL;
 727                         }
 728                 }
 729         }
 730         if (str < s) {
 731                 new_argv[i] = str;
 732                 i++;
 733         }
 734
 735         memcpy(new_argv + i, orig_argv + 1, sizeof(char *) * (argc - 1));
 736         new_argv[i + argc] = NULL;
 737         *p_argc = i + argc - 1;
 738
 739         return new_argv;
 740 }
 741
 742 static int do_modprobe(int argc, char **orig_argv)
 743 {
 744         struct kmod_ctx *ctx;
 745         char **args = NULL, **argv;
 746         const char **config_paths = NULL;
 747         int nargs = 0, n_config_paths = 0;
 748         char dirname_buf[PATH_MAX];
 749         const char *dirname = NULL;
 750         const char *root = NULL;
 751         const char *kversion = NULL;
 752         int use_all = 0;
 753         int do_remove = 0;
 754         int do_show_config = 0;
 755         int do_show_modversions = 0;
 756         int err;
 757
 758         argv = prepend_options_from_env(&argc, orig_argv);
 759         if (argv == NULL) {
 760                 ERR("Could not prepend options from command line\n");
 761                 return EXIT_FAILURE;
 762         }
 763
 764         for (;;) {
 765                 int c, idx = 0;
 766                 c = getopt_long(argc, argv, cmdopts_s, cmdopts, &idx);
 767                 if (c == -1)
 768                         break;
 769                 switch (c) {
 770                 case 'a':
 771                         log_priority = LOG_WARNING;
 772                         use_all = 1;
 773                         break;
 774                 case 'r':
 775                         do_remove = 1;
 776                         break;
 777                 case 5:
 778                         remove_dependencies = 1;
 779                         break;
 780                 case 'R':
 781                         lookup_only = 1;
 782                         break;
 783                 case 3:
 784                         first_time = 1;
 785                         break;
 786                 case 'i':
 787                         ignore_commands = 1;
 788                         break;
 789                 case 'b':
 790                         use_blacklist = 1;
 791                         break;
 792                 case 'f':
 793                         force = 1;
 794                         break;
 795                 case 2:
 796                         strip_modversion = 1;
 797                         break;
 798                 case 1:
 799                         strip_vermagic = 1;
 800                         break;
 801                 case 'D':
 802                         ignore_loaded = 1;
 803                         dry_run = 1;
 804                         do_show = 1;
 805                         break;
 806                 case 'c':
 807                         do_show_config = 1;
 808                         break;
 809                 case 4:
 810                         do_show_modversions = 1;
 811                         break;
 812                 case 'n':
 813                         dry_run = 1;
 814                         break;
 815                 case 'C': {
 816                         size_t bytes = sizeof(char *) * (n_config_paths + 2);
 817                         void *tmp = realloc(config_paths, bytes);
 818                         if (!tmp) {
 819                                 ERR("out-of-memory\n");
 820                                 err = -1;
 821                                 goto done;
 822                         }
 823                         config_paths = tmp;
 824                         config_paths[n_config_paths] = optarg;
 825                         n_config_paths++;
 826                         config_paths[n_config_paths] = NULL;
 827
 828                         env_modprobe_options_append("-C");
 829                         env_modprobe_options_append(optarg);
 830                         break;
 831                 }
 832                 case 'd':
 833                         root = optarg;
 834                         break;
 835                 case 'S':
 836                         kversion = optarg;
 837                         break;
 838                 case 's':
 839                         env_modprobe_options_append("-s");
 840                         use_syslog = 1;
 841                         break;
 842                 case 'q':
 843                         env_modprobe_options_append("-q");
 844                         verbose = LOG_EMERG;
 845                         break;
 846                 case 'v':
 847                         env_modprobe_options_append("-v");
 848                         verbose++;
 849                         break;
 850                 case 'V':
 851                         puts(PACKAGE " version " VERSION);
 852                         err = 0;
 853                         goto done;
 854                 case 'h':
 855                         help();
 856                         err = 0;
 857                         goto done;
 858                 case '?':
 859                         err = -1;
 860                         goto done;
 861                 default:
 862                         ERR("unexpected getopt_long() value '%c'.\n", c);
 863                         err = -1;
 864                         goto done;
 865                 }
 866         }
 867
 868         args = argv + optind;
 869         nargs = argc - optind;
 870
 871         log_open(use_syslog);
 872
 873         if (!do_show_config) {
 874                 if (nargs == 0) {
 875                         ERR("missing parameters. See -h.\n");
 876                         err = -1;
 877                         goto done;
 878                 }
 879         }
 880
 881         if (root != NULL || kversion != NULL) {
 882                 struct utsname u;
 883                 if (root == NULL)
 884                         root = "";
 885                 if (kversion == NULL) {
 886                         if (uname(&u) < 0) {
 887                                 ERR("uname() failed: %m\n");
 888                                 err = -1;
 889                                 goto done;
 890                         }
 891                         kversion = u.release;
 892                 }
 893                 snprintf(dirname_buf, sizeof(dirname_buf),
 894                                 "%s/lib/modules/%s", root,
 895                                 kversion);
 896                 dirname = dirname_buf;
 897         }
 898
 899         ctx = kmod_new(dirname, config_paths);
 900         if (!ctx) {
 901                 ERR("kmod_new() failed!\n");
 902                 err = -1;
 903                 goto done;
 904         }
 905
 906         log_setup_kmod_log(ctx, verbose);
 907
 908         kmod_load_resources(ctx);
 909
 910         if (do_show_config)
 911                 err = show_config(ctx);
 912         else if (do_show_modversions)
 913                 err = show_modversions(ctx, args[0]);
 914         else if (do_remove)
 915                 err = rmmod_all(ctx, args, nargs);
 916         else if (use_all)
 917                 err = insmod_all(ctx, args, nargs);
 918         else {
 919                 char *opts;
 920                 err = options_from_array(args, nargs, &opts);
 921                 if (err == 0) {
 922                         err = insmod(ctx, args[0], opts);
 923                         free(opts);
 924                 }
 925         }
 926
 927         kmod_unref(ctx);
 928
 929 done:
 930         log_close();
 931
 932         if (argv != orig_argv)
 933                 free(argv);
 934
 935         free(config_paths);
 936
 937         return err >= 0 ? EXIT_SUCCESS : EXIT_FAILURE;
 938 }
 939
 940 const struct kmod_cmd kmod_cmd_compat_modprobe = {
 941         .name = "modprobe",
 942         .cmd = do_modprobe,
 943         .help = "compat modprobe command",
 944 };