sbin/kldunload/kldunload.c

   1 /*-
   2  * Copyright (c) 1997 Doug Rabson
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #include <sys/cdefs.h>
  28 __FBSDID("$FreeBSD$");
  29
  30 #include <sys/param.h>
  31 #include <sys/linker.h>
  32
  33 #include <err.h>
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <sysexits.h>
  37 #include <unistd.h>
  38
  39 static void
  40 usage(void)
  41 {
  42         fprintf(stderr, "usage: kldunload [-fv] -i id ...\n");
  43         fprintf(stderr, "       kldunload [-fv] [-n] name ...\n");
  44         exit(EX_USAGE);
  45 }
  46
  47 #define OPT_NULL        0x00
  48 #define OPT_ID          0x01
  49 #define OPT_VERBOSE     0x02
  50 #define OPT_FORCE       0x04
  51
  52 int
  53 main(int argc, char** argv)
  54 {
  55         struct kld_file_stat stat;
  56         int c, fileid, force, opt;
  57         char *filename;
  58
  59         filename = NULL;
  60         opt = OPT_NULL;
  61
  62         while ((c = getopt(argc, argv, "finv")) != -1) {
  63                 switch (c) {
  64                 case 'f':
  65                         opt |= OPT_FORCE;
  66                         break;
  67                 case 'i':
  68                         opt |= OPT_ID;
  69                         break;
  70                 case 'n':
  71                         /*
  72                          * XXX: For backward compatibility. Currently does
  73                          * nothing
  74                          */
  75                         break;
  76                 case 'v':
  77                         opt |= OPT_VERBOSE;
  78                         break;
  79                 default:
  80                         usage();
  81                 }
  82         }
  83
  84         argc -= optind;
  85         argv += optind;
  86
  87         if (argc == 0)
  88                 usage();
  89
  90         while ((filename = *argv++) != NULL) {
  91                 if (opt & OPT_ID) {
  92                         fileid = atoi(filename);
  93                         if (fileid < 0)
  94                                 errx(EXIT_FAILURE, "Invalid ID %s", optarg);
  95                 } else {
  96                         if ((fileid = kldfind(filename)) < 0)
  97                                 errx(EXIT_FAILURE, "can't find file %s",
  98                                     filename);
  99                 }
 100                 if (opt & OPT_VERBOSE) {
 101                         stat.version = sizeof(stat);
 102                         if (kldstat(fileid, &stat) < 0)
 103                                 err(EXIT_FAILURE, "can't stat file");
 104                         (void) printf("Unloading %s, id=%d\n", stat.name,
 105                             fileid);
 106                 }
 107                 if (opt & OPT_FORCE)
 108                         force = LINKER_UNLOAD_FORCE;
 109                 else
 110                         force = LINKER_UNLOAD_NORMAL;
 111
 112                 if (kldunloadf(fileid, force) < 0)
 113                         err(EXIT_FAILURE, "can't unload file");
 114         }
 115
 116         return (EXIT_SUCCESS);
 117 }