mirror of
https://github.com/topjohnwu/ndk-busybox.git
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123 lines
3.1 KiB
C
123 lines
3.1 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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <stdio.h>
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#include <errno.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <getopt.h>
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#include <fcntl.h>
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#include <string.h>
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#include <sys/utsname.h>
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#include <sys/syscall.h>
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#include "busybox.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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#if ENABLE_FEATURE_2_4_MODULES
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int kr_chk = 1;
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if (get_kernel_revision() <= 2*65536+6*256)
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kr_chk = 0;
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#else
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#define kr_chk 1
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#endif
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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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#endif
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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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#ifdef CONFIG_FEATURE_QUERY_MODULE_INTERFACE
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/* bb_common_bufsiz1 hold the module names which we ignore
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but must get */
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size_t bufsize = sizeof(bb_common_bufsiz1);
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#endif
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/* Parse command line. */
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n = bb_getopt_ulflags(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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#ifdef CONFIG_FEATURE_QUERY_MODULE_INTERFACE
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/* 1 == QM_MODULES */
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if (my_query_module(NULL, 1, &bb_common_bufsiz1, &bufsize, &nmod)) {
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bb_perror_msg_and_die("QM_MODULES");
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}
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#endif
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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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#ifdef CONFIG_FEATURE_2_6_MODULES
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const char *afterslash;
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char *module_name;
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afterslash = strrchr(argv[n], '/');
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if (!afterslash)
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afterslash = argv[n];
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else
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afterslash++;
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module_name = alloca(strlen(afterslash) + 1);
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filename2modname(module_name, afterslash);
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#else
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#define module_name argv[n]
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#endif
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if (syscall(__NR_delete_module, module_name, flags) != 0) {
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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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