[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 |
|
---|
| 10 | #include "busybox.h"
|
---|
| 11 | #include <stdio.h>
|
---|
| 12 | #include <errno.h>
|
---|
| 13 | #include <unistd.h>
|
---|
| 14 | #include <stdlib.h>
|
---|
| 15 | #include <getopt.h>
|
---|
| 16 | #include <fcntl.h>
|
---|
| 17 | #include <string.h>
|
---|
| 18 | #include <sys/utsname.h>
|
---|
| 19 | #include <sys/syscall.h>
|
---|
| 20 |
|
---|
| 21 | #ifdef CONFIG_FEATURE_2_6_MODULES
|
---|
| 22 | static inline void filename2modname(char *modname, const char *afterslash)
|
---|
| 23 | {
|
---|
| 24 | unsigned int i;
|
---|
| 25 |
|
---|
| 26 | #if ENABLE_FEATURE_2_4_MODULES
|
---|
| 27 | int kr_chk = 1;
|
---|
| 28 | if (get_linux_version_code() <= KERNEL_VERSION(2,6,0))
|
---|
| 29 | kr_chk = 0;
|
---|
| 30 | #else
|
---|
| 31 | #define kr_chk 1
|
---|
| 32 | #endif
|
---|
| 33 |
|
---|
| 34 | /* Convert to underscores, stop at first . */
|
---|
| 35 | for (i = 0; afterslash[i] && afterslash[i] != '.'; i++) {
|
---|
| 36 | if (kr_chk && (afterslash[i] == '-'))
|
---|
| 37 | modname[i] = '_';
|
---|
| 38 | else
|
---|
| 39 | modname[i] = afterslash[i];
|
---|
| 40 | }
|
---|
| 41 | modname[i] = '\0';
|
---|
| 42 | }
|
---|
| 43 | #endif
|
---|
| 44 |
|
---|
| 45 | int rmmod_main(int argc, char **argv)
|
---|
| 46 | {
|
---|
| 47 | int n, ret = EXIT_SUCCESS;
|
---|
| 48 | unsigned int flags = O_NONBLOCK|O_EXCL;
|
---|
| 49 | #ifdef CONFIG_FEATURE_QUERY_MODULE_INTERFACE
|
---|
| 50 | /* bb_common_bufsiz1 hold the module names which we ignore
|
---|
| 51 | but must get */
|
---|
| 52 | size_t bufsize = sizeof(bb_common_bufsiz1);
|
---|
| 53 | #endif
|
---|
| 54 |
|
---|
| 55 | /* Parse command line. */
|
---|
| 56 | n = bb_getopt_ulflags(argc, argv, "wfa");
|
---|
| 57 | if((n & 1)) // --wait
|
---|
| 58 | flags &= ~O_NONBLOCK;
|
---|
| 59 | if((n & 2)) // --force
|
---|
| 60 | flags |= O_TRUNC;
|
---|
| 61 | if((n & 4)) {
|
---|
| 62 | /* Unload _all_ unused modules via NULL delete_module() call */
|
---|
| 63 | /* until the number of modules does not change */
|
---|
| 64 | size_t nmod = 0; /* number of modules */
|
---|
| 65 | size_t pnmod = -1; /* previous number of modules */
|
---|
| 66 |
|
---|
| 67 | while (nmod != pnmod) {
|
---|
| 68 | if (syscall(__NR_delete_module, NULL, flags) != 0) {
|
---|
| 69 | if (errno==EFAULT)
|
---|
| 70 | return(ret);
|
---|
| 71 | bb_perror_msg_and_die("rmmod");
|
---|
| 72 | }
|
---|
| 73 | pnmod = nmod;
|
---|
| 74 | #ifdef CONFIG_FEATURE_QUERY_MODULE_INTERFACE
|
---|
| 75 | /* 1 == QM_MODULES */
|
---|
| 76 | if (my_query_module(NULL, 1, &bb_common_bufsiz1, &bufsize, &nmod)) {
|
---|
| 77 | bb_perror_msg_and_die("QM_MODULES");
|
---|
| 78 | }
|
---|
| 79 | #endif
|
---|
| 80 | }
|
---|
| 81 | return EXIT_SUCCESS;
|
---|
| 82 | }
|
---|
| 83 |
|
---|
| 84 | if (optind == argc)
|
---|
| 85 | bb_show_usage();
|
---|
| 86 |
|
---|
| 87 | for (n = optind; n < argc; n++) {
|
---|
| 88 | #ifdef CONFIG_FEATURE_2_6_MODULES
|
---|
| 89 | const char *afterslash;
|
---|
| 90 | char *module_name;
|
---|
| 91 |
|
---|
| 92 | afterslash = strrchr(argv[n], '/');
|
---|
| 93 | if (!afterslash)
|
---|
| 94 | afterslash = argv[n];
|
---|
| 95 | else
|
---|
| 96 | afterslash++;
|
---|
| 97 | module_name = alloca(strlen(afterslash) + 1);
|
---|
| 98 | filename2modname(module_name, afterslash);
|
---|
| 99 | #else
|
---|
| 100 | #define module_name argv[n]
|
---|
| 101 | #endif
|
---|
| 102 | if (syscall(__NR_delete_module, module_name, flags) != 0) {
|
---|
| 103 | bb_perror_msg("%s", argv[n]);
|
---|
| 104 | ret = EXIT_FAILURE;
|
---|
| 105 | }
|
---|
| 106 | }
|
---|
| 107 |
|
---|
| 108 | return(ret);
|
---|
| 109 | }
|
---|