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/* vi: set sw=4 ts=4: */
/*
* Mini rmmod implementation for busybox
*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#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>
#include "busybox.h"
#ifdef CONFIG_FEATURE_2_6_MODULES
static inline void filename2modname(char *modname, const char *filename)
{
const char *afterslash;
unsigned int i;
afterslash = strrchr(filename, '/');
if (!afterslash)
afterslash = filename;
else
afterslash++;
/* Convert to underscores, stop at first . */
for (i = 0; afterslash[i] && afterslash[i] != '.'; i++) {
int kr_chk = 1;
if (ENABLE_FEATURE_2_4_MODULES) {
struct utsname uname_info;
if (uname(&uname_info) == -1)
bb_error_msg_and_die("cannot get uname data");
if (strcmp(uname_info.release, "2.6") < 0)
kr_chk = 0;
}
if (kr_chk && (afterslash[i] == '-'))
modname[i] = '_';
else
modname[i] = afterslash[i];
}
modname[i] = '\0';
}
#endif
extern int rmmod_main(int argc, char **argv)
{
int n, ret = EXIT_SUCCESS;
size_t nmod = 0; /* number of modules */
size_t pnmod = -1; /* previous number of modules */
unsigned int flags = O_NONBLOCK|O_EXCL;
#ifdef CONFIG_FEATURE_QUERY_MODULE_INTERFACE
void *buf; /* hold the module names which we ignore but must get */
size_t bufsize = 0;
#endif
/* Parse command line. */
while ((n = getopt(argc, argv, "a")) != EOF) {
switch (n) {
case 'w': // --wait
flags &= ~O_NONBLOCK;
break;
case 'f': // --force
flags |= O_TRUNC;
break;
case 'a':
/* Unload _all_ unused modules via NULL delete_module() call */
/* until the number of modules does not change */
#ifdef CONFIG_FEATURE_QUERY_MODULE_INTERFACE
buf = xmalloc(bufsize = 256);
#endif
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, &buf, &bufsize, &nmod)) {
bb_perror_msg_and_die("QM_MODULES");
}
#endif
}
#if defined CONFIG_FEATURE_CLEAN_UP && CONFIG_FEATURE_QUERY_MODULE_INTERFACE
free(buf);
#endif
return EXIT_SUCCESS;
default:
bb_show_usage();
}
}
if (optind == argc)
bb_show_usage();
{
for (n = optind; n < argc; n++) {
#ifdef CONFIG_FEATURE_2_6_MODULES
char module_name[strlen(argv[n]) + 1];
filename2modname(module_name, argv[n]);
#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);
}
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