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