LXR busybox/modutils/rmmod.c

   1/* vi: set sw=4 ts=4: */
   2/*
   3 * Mini rmmod implementation for busybox
   4 *
   5 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
   6 * Copyright (C) 2008 Timo Teras <timo.teras@iki.fi>
   7 *
   8 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
   9 */
  10
  11#include "libbb.h"
  12#include "modutils.h"
  13
  14int rmmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  15int rmmod_main(int argc UNUSED_PARAM, char **argv)
  16{
  17        int n;
  18        unsigned flags = O_NONBLOCK | O_EXCL;
  19
  20        /* Parse command line. */
  21        n = getopt32(argv, "wfas"); // -s ignored
  22        argv += optind;
  23        if (n & 1)      // --wait
  24                flags &= ~O_NONBLOCK;
  25        if (n & 2)      // --force
  26                flags |= O_TRUNC;
  27        if (n & 4) {
  28                /* Unload _all_ unused modules via NULL delete_module() call */
  29                if (bb_delete_module(NULL, flags) != 0 && errno != EFAULT)
  30                        bb_perror_msg_and_die("rmmod");
  31                return EXIT_SUCCESS;
  32        }
  33
  34        if (!*argv)
  35                bb_show_usage();
  36
  37        n = ENABLE_FEATURE_2_4_MODULES && get_linux_version_code() < KERNEL_VERSION(2,6,0);
  38        while (*argv) {
  39                char modname[MODULE_NAME_LEN];
  40                const char *bname;
  41
  42                bname = bb_basename(*argv++);
  43                if (n)
  44                        safe_strncpy(modname, bname, MODULE_NAME_LEN);
  45                else
  46                        filename2modname(bname, modname);
  47                if (bb_delete_module(modname, flags))
  48                        bb_error_msg_and_die("can't unload '%s': %s",
  49                                             modname, moderror(errno));
  50        }
  51
  52        return EXIT_SUCCESS;
  53}
  54