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100 lines
2.4 KiB
C
100 lines
2.4 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini rmmod implementation for busybox
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*
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* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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#include "libbb.h"
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#include <sys/syscall.h>
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#ifdef CONFIG_FEATURE_2_6_MODULES
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static inline void filename2modname(char *modname, const char *afterslash)
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{
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unsigned int i;
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int kr_chk = 1;
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if (ENABLE_FEATURE_2_4_MODULES
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&& get_linux_version_code() <= KERNEL_VERSION(2,6,0))
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kr_chk = 0;
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/* Convert to underscores, stop at first . */
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for (i = 0; afterslash[i] && afterslash[i] != '.'; i++) {
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if (kr_chk && (afterslash[i] == '-'))
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modname[i] = '_';
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else
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modname[i] = afterslash[i];
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}
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modname[i] = '\0';
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}
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#else
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void filename2modname(char *modname, const char *afterslash);
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#endif
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// There really should be a header file for this...
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int query_module(const char *name, int which, void *buf,
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size_t bufsize, size_t *ret);
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int rmmod_main(int argc, char **argv);
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int rmmod_main(int argc, char **argv)
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{
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int n, ret = EXIT_SUCCESS;
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unsigned int flags = O_NONBLOCK|O_EXCL;
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#define misc_buf bb_common_bufsiz1
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/* Parse command line. */
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n = getopt32(argc, argv, "wfa");
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if (n & 1) // --wait
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flags &= ~O_NONBLOCK;
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if (n & 2) // --force
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flags |= O_TRUNC;
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if (n & 4) {
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/* Unload _all_ unused modules via NULL delete_module() call */
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/* until the number of modules does not change */
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size_t nmod = 0; /* number of modules */
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size_t pnmod = -1; /* previous number of modules */
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while (nmod != pnmod) {
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if (syscall(__NR_delete_module, NULL, flags) != 0) {
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if (errno == EFAULT)
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return ret;
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bb_perror_msg_and_die("rmmod");
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}
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pnmod = nmod;
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// the 1 here is QM_MODULES.
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if (ENABLE_FEATURE_QUERY_MODULE_INTERFACE && query_module(NULL,
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1, misc_buf, sizeof(misc_buf),
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&nmod))
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{
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bb_perror_msg_and_die("QM_MODULES");
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}
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}
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return EXIT_SUCCESS;
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}
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if (optind == argc)
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bb_show_usage();
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for (n = optind; n < argc; n++) {
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if (ENABLE_FEATURE_2_6_MODULES) {
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const char *afterslash;
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afterslash = strrchr(argv[n], '/');
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if (!afterslash) afterslash = argv[n];
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else afterslash++;
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filename2modname(misc_buf, afterslash);
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}
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if (syscall(__NR_delete_module, ENABLE_FEATURE_2_6_MODULES ? misc_buf : argv[n], flags)) {
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bb_perror_msg("%s", argv[n]);
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ret = EXIT_FAILURE;
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}
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}
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return ret;
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}
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