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https://github.com/sheumann/hush.git
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1daa0c6097
half way converted, and still used the old delete_module(), call rather than a syscall, in one spot.
84 lines
2.3 KiB
C
84 lines
2.3 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 <sys/syscall.h>
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#include "busybox.h"
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extern int rmmod_main(int argc, char **argv)
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{
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int n, ret = EXIT_SUCCESS;
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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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void *buf; /* hold the module names which we ignore but must get */
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size_t bufsize = 0;
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unsigned int flags = O_NONBLOCK|O_EXCL;
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/* Parse command line. */
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while ((n = getopt(argc, argv, "a")) != EOF) {
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switch (n) {
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case 'w': // --wait
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flags &= ~O_NONBLOCK;
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break;
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case 'f': // --force
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flags |= O_TRUNC;
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break;
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case 'a':
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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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buf = xmalloc(bufsize = 256);
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while (nmod != pnmod) {
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if (syscall(__NR_delete_module, NULL, flags) < 0)
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bb_perror_msg_and_die("rmmod");
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pnmod = nmod;
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/* 1 == QM_MODULES */
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if (my_query_module(NULL, 1, &buf, &bufsize, &nmod)) {
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bb_perror_msg_and_die("QM_MODULES");
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}
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}
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#ifdef CONFIG_FEATURE_CLEAN_UP
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free(buf);
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#endif
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return EXIT_SUCCESS;
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default:
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bb_show_usage();
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}
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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 (syscall(__NR_delete_module, argv[n], 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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