65a311fcb2
Add a MOD_QUIESCE event for modules. This should return error (EBUSY) of the module is in use. MOD_UNLOAD should now only fail if it is impossible (as opposed to inconvenient) to unload the module. Valid reasons are memory references into the module which cannot be tracked down and eliminated. When kldunloading, we abandon if MOD_UNLOAD fails, and if -force is not given, MOD_QUIESCE failing will also prevent the unload. For backwards compatibility, we treat EOPNOTSUPP from MOD_QUIESCE as success. Document that modules should return EOPNOTSUPP for unknown events.
105 lines
2.8 KiB
C
105 lines
2.8 KiB
C
/*-
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* Copyright (c) 1997 Doug Rabson
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/param.h>
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#include <sys/linker.h>
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static void
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usage(void)
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{
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fprintf(stderr, "usage: kldunload [-v] -i id\n");
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fprintf(stderr, " kldunload [-v] [-n] name\n");
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exit(1);
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}
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int
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main(int argc, char** argv)
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{
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int c;
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int verbose = 0;
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int fileid = 0;
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int force = LINKER_UNLOAD_NORMAL;
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char* filename = NULL;
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while ((c = getopt(argc, argv, "fi:n:v")) != -1)
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switch (c) {
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case 'f':
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force = LINKER_UNLOAD_FORCE;
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break;
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case 'i':
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fileid = atoi(optarg);
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if (!fileid)
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errx(1, "Invalid ID %s", optarg);
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break;
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case 'n':
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filename = optarg;
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break;
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case 'v':
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verbose = 1;
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break;
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (fileid == 0 && filename == NULL && (argc == 1)) {
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filename = *argv;
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argc--;
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}
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if (argc != 0 || (fileid != 0 && filename != NULL))
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usage();
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if (fileid == 0 && filename == NULL)
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usage();
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if (filename != NULL) {
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if ((fileid = kldfind(filename)) < 0)
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err(1, "can't find file %s", filename);
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}
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if (verbose) {
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struct kld_file_stat stat;
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stat.version = sizeof stat;
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if (kldstat(fileid, &stat) < 0)
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err(1, "can't stat file");
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printf("Unloading %s, id=%d\n", stat.name, fileid);
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}
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if (kldunloadf(fileid, force) < 0)
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err(1, "can't unload file");
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return 0;
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}
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