[821] | 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 | *
|
---|
| 7 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
|
---|
| 8 | */
|
---|
| 9 |
|
---|
[1770] | 10 | #include "libbb.h"
|
---|
[821] | 11 | #include <sys/syscall.h>
|
---|
| 12 |
|
---|
[1770] | 13 | #if ENABLE_FEATURE_2_6_MODULES
|
---|
[821] | 14 | static inline void filename2modname(char *modname, const char *afterslash)
|
---|
| 15 | {
|
---|
| 16 | unsigned int i;
|
---|
| 17 | int kr_chk = 1;
|
---|
| 18 |
|
---|
[1770] | 19 | if (ENABLE_FEATURE_2_4_MODULES
|
---|
| 20 | && get_linux_version_code() <= KERNEL_VERSION(2,6,0))
|
---|
| 21 | kr_chk = 0;
|
---|
| 22 |
|
---|
[821] | 23 | /* Convert to underscores, stop at first . */
|
---|
| 24 | for (i = 0; afterslash[i] && afterslash[i] != '.'; i++) {
|
---|
| 25 | if (kr_chk && (afterslash[i] == '-'))
|
---|
| 26 | modname[i] = '_';
|
---|
| 27 | else
|
---|
| 28 | modname[i] = afterslash[i];
|
---|
| 29 | }
|
---|
| 30 | modname[i] = '\0';
|
---|
| 31 | }
|
---|
[1770] | 32 | #else
|
---|
| 33 | void filename2modname(char *modname, const char *afterslash);
|
---|
[821] | 34 | #endif
|
---|
| 35 |
|
---|
[1770] | 36 | // There really should be a header file for this...
|
---|
| 37 |
|
---|
| 38 | int query_module(const char *name, int which, void *buf,
|
---|
| 39 | size_t bufsize, size_t *ret);
|
---|
| 40 |
|
---|
| 41 | int rmmod_main(int argc, char **argv);
|
---|
[821] | 42 | int rmmod_main(int argc, char **argv)
|
---|
| 43 | {
|
---|
| 44 | int n, ret = EXIT_SUCCESS;
|
---|
| 45 | unsigned int flags = O_NONBLOCK|O_EXCL;
|
---|
| 46 |
|
---|
[1770] | 47 | #define misc_buf bb_common_bufsiz1
|
---|
| 48 |
|
---|
[821] | 49 | /* Parse command line. */
|
---|
[1770] | 50 | n = getopt32(argv, "wfa");
|
---|
| 51 | if (n & 1) // --wait
|
---|
[821] | 52 | flags &= ~O_NONBLOCK;
|
---|
[1770] | 53 | if (n & 2) // --force
|
---|
[821] | 54 | flags |= O_TRUNC;
|
---|
[1770] | 55 | if (n & 4) {
|
---|
[821] | 56 | /* Unload _all_ unused modules via NULL delete_module() call */
|
---|
| 57 | /* until the number of modules does not change */
|
---|
| 58 | size_t nmod = 0; /* number of modules */
|
---|
| 59 | size_t pnmod = -1; /* previous number of modules */
|
---|
| 60 |
|
---|
| 61 | while (nmod != pnmod) {
|
---|
| 62 | if (syscall(__NR_delete_module, NULL, flags) != 0) {
|
---|
[1770] | 63 | if (errno == EFAULT)
|
---|
| 64 | return ret;
|
---|
[821] | 65 | bb_perror_msg_and_die("rmmod");
|
---|
| 66 | }
|
---|
| 67 | pnmod = nmod;
|
---|
[1770] | 68 | // the 1 here is QM_MODULES.
|
---|
| 69 | if (ENABLE_FEATURE_QUERY_MODULE_INTERFACE && query_module(NULL,
|
---|
| 70 | 1, misc_buf, sizeof(misc_buf),
|
---|
| 71 | &nmod))
|
---|
| 72 | {
|
---|
[821] | 73 | bb_perror_msg_and_die("QM_MODULES");
|
---|
| 74 | }
|
---|
| 75 | }
|
---|
| 76 | return EXIT_SUCCESS;
|
---|
| 77 | }
|
---|
| 78 |
|
---|
| 79 | if (optind == argc)
|
---|
| 80 | bb_show_usage();
|
---|
| 81 |
|
---|
| 82 | for (n = optind; n < argc; n++) {
|
---|
[1770] | 83 | if (ENABLE_FEATURE_2_6_MODULES) {
|
---|
| 84 | filename2modname(misc_buf, bb_basename(argv[n]));
|
---|
| 85 | }
|
---|
[821] | 86 |
|
---|
[1770] | 87 | if (syscall(__NR_delete_module, ENABLE_FEATURE_2_6_MODULES ? misc_buf : argv[n], flags)) {
|
---|
[821] | 88 | bb_perror_msg("%s", argv[n]);
|
---|
| 89 | ret = EXIT_FAILURE;
|
---|
| 90 | }
|
---|
| 91 | }
|
---|
| 92 |
|
---|
[1770] | 93 | return ret;
|
---|
[821] | 94 | }
|
---|