/* 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 "busybox.h" #include <stdio.h> #include <errno.h> #include <unistd.h> #include <stdlib.h> #include <getopt.h> #include <fcntl.h> #include <string.h> #include <sys/utsname.h> #include <sys/syscall.h> #ifdef CONFIG_FEATURE_2_6_MODULES static inline void filename2modname(char *modname, const char *afterslash) { unsigned int i; #if ENABLE_FEATURE_2_4_MODULES int kr_chk = 1; if (get_linux_version_code() <= KERNEL_VERSION(2,6,0)) kr_chk = 0; #else #define kr_chk 1 #endif /* 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'; } #endif int rmmod_main(int argc, char **argv) { int n, ret = EXIT_SUCCESS; unsigned int flags = O_NONBLOCK|O_EXCL; #ifdef CONFIG_FEATURE_QUERY_MODULE_INTERFACE /* bb_common_bufsiz1 hold the module names which we ignore but must get */ size_t bufsize = sizeof(bb_common_bufsiz1); #endif /* Parse command line. */ n = bb_getopt_ulflags(argc, 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; #ifdef CONFIG_FEATURE_QUERY_MODULE_INTERFACE /* 1 == QM_MODULES */ if (my_query_module(NULL, 1, &bb_common_bufsiz1, &bufsize, &nmod)) { bb_perror_msg_and_die("QM_MODULES"); } #endif } return EXIT_SUCCESS; } if (optind == argc) bb_show_usage(); for (n = optind; n < argc; n++) { #ifdef CONFIG_FEATURE_2_6_MODULES const char *afterslash; char *module_name; afterslash = strrchr(argv[n], '/'); if (!afterslash) afterslash = argv[n]; else afterslash++; module_name = alloca(strlen(afterslash) + 1); filename2modname(module_name, afterslash); #else #define module_name argv[n] #endif if (syscall(__NR_delete_module, module_name, flags) != 0) { bb_perror_msg("%s", argv[n]); ret = EXIT_FAILURE; } } return(ret); }