1 /* rmmod.c - Remove a module from the Linux kernel. 2 * 3 * Copyright 2012 Elie De Brauwer <eliedebrauwer (at) gmail.com> 4 5 USE_RMMOD(NEWTOY(rmmod, "<1wf", TOYFLAG_SBIN|TOYFLAG_NEEDROOT)) 6 7 config RMMOD 8 bool "rmmod" 9 default y 10 help 11 usage: rmmod [-wf] [MODULE] 12 13 Unload the module named MODULE from the Linux kernel. 14 -f Force unload of a module 15 -w Wait until the module is no longer used 16 17 */ 18 19 #define FOR_rmmod 20 #include "toys.h" 21 22 #include <sys/syscall.h> 23 #define delete_module(mod, flags) syscall(__NR_delete_module, mod, flags) 24 25 void rmmod_main(void) 26 { 27 unsigned int flags = O_NONBLOCK|O_EXCL; 28 char * mod_name; 29 int len; 30 31 // Basename 32 mod_name = basename(*toys.optargs); 33 34 // Remove .ko if present 35 len = strlen(mod_name); 36 if (len > 3 && !strcmp(&mod_name[len-3], ".ko" )) mod_name[len-3] = 0; 37 38 if (toys.optflags & FLAG_f) flags |= O_TRUNC; 39 if (toys.optflags & FLAG_w) flags &= ~O_NONBLOCK; 40 41 if (delete_module(mod_name, flags)) 42 perror_exit("failed to unload %s", mod_name); 43 } 44
