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/* vi: set sw=4 ts=4:
*
* rmmod.c - Remove a module from the Linux kernel.
*
* Copyright 2012 Elie De Brauwer <eliedebrauwer@gmail.com>
*
* Not in SUSv4.
USE_RMMOD(NEWTOY(rmmod, "<1wf", TOYFLAG_BIN|TOYFLAG_NEEDROOT))
config RMMOD
bool "rmmod"
default y
help
usage: rmmod [-wf] [MODULE]
Unload the module named MODULE from the Linux kernel.
-f Force unload of a module
-w Wait until the module is no longer used.
*/
#include "toys.h"
#include <sys/syscall.h>
#define delete_module(mod, flags) syscall(__NR_delete_module, mod, flags)
void rmmod_main(void)
{
unsigned int flags = O_NONBLOCK|O_EXCL;
char * mod_name;
int len;
// Basename
mod_name = strrchr(toys.optargs[0],'/');
if (mod_name)
mod_name++;
else
mod_name = toys.optargs[0];
// Remove .ko if present
len = strlen(mod_name);
if (len > 3 && !strcmp(&mod_name[len-3], ".ko" ))
mod_name[len-3] = 0;
if (toys.optflags & 1) flags |= O_TRUNC;
if (toys.optflags & 2) flags &= ~O_NONBLOCK;
if (delete_module(mod_name, flags))
perror_exit("failed to unload %s", mod_name);
}
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