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  * $FreeBSD: src/sbin/kldunload/kldunload.c,v 1.10 1999/09/08 05:46:47 bde Exp $
  27  * $DragonFly: src/sbin/kldunload/kldunload.c,v 1.5 2007/11/25 18:10:07 swildner Exp $
  28  */
  29 #include <sys/param.h>
  30 #include <sys/linker.h>
  31
  32 #include <err.h>
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <unistd.h>
  36
  37 static void
  38 usage(void)
  39 {
  40     fprintf(stderr, "usage: kldunload [-v] -i id\n");
  41     fprintf(stderr, "       kldunload [-v] [-n] name\n");
  42     exit(1);
  43 }
  44
  45 int
  46 main(int argc, char** argv)
  47 {
  48     int c;
  49     int verbose = 0;
  50     int fileid = 0;
  51     long tmp;
  52     char *ep;
  53     char* filename = NULL;
  54
  55     while ((c = getopt(argc, argv, "i:n:v")) != -1)
  56         switch (c) {
  57         case 'i':
  58             tmp = strtol(optarg, &ep, 10);
  59             if (*ep != '\0' || tmp < INT_MIN || tmp > INT_MAX)
  60                 errx(1, "invalid file id: %s", optarg);
  61             fileid = (int)tmp;
  62             break;
  63         case 'n':
  64             filename = optarg;
  65             break;
  66         case 'v':
  67             verbose = 1;
  68             break;
  69         default:
  70             usage();
  71         }
  72     argc -= optind;
  73     argv += optind;
  74
  75     if (!fileid && filename == NULL && (argc == 1)) {
  76         filename = *argv;
  77         argc--;
  78     }
  79
  80     if (argc != 0 || (fileid && filename != NULL))
  81         usage();
  82
  83     if (fileid == 0 && filename == NULL)
  84         usage();
  85
  86     if (filename != NULL) {
  87         if ((fileid = kldfind(filename)) < 0)
  88             err(1, "can't find file %s", filename);
  89     }
  90
  91     if (verbose) {
  92         struct kld_file_stat stat;
  93         stat.version = sizeof stat;
  94         if (kldstat(fileid, &stat) < 0)
  95             err(1, "can't stat file");
  96         printf("Unloading %s, id=%d\n", stat.name, fileid);
  97     }
  98
  99     if (kldunload(fileid) < 0)
 100         err(1, "can't unload file");
 101
 102     return 0;
 103 }