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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>
*
* 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);
}
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