1 /* insmod.c - Load a module into the Linux kernel. 2 * 3 * Copyright 2012 Elie De Brauwer <eliedebrauwer (at) gmail.com> 4 5 USE_INSMOD(NEWTOY(insmod, "<1", TOYFLAG_SBIN|TOYFLAG_NEEDROOT)) 6 7 config INSMOD 8 bool "insmod" 9 default y 10 help 11 usage: insmod MODULE [MODULE_OPTIONS] 12 13 Load the module named MODULE passing options if given. 14 */ 15 16 #include "toys.h" 17 18 #include <sys/syscall.h> 19 #ifdef SYS_finit_module 20 #define finit_module(fd, opts, flags) syscall(SYS_finit_module, fd, opts, flags) 21 #else 22 #define finit_module(a, b, c) (errno = ENOSYS) 23 #endif 24 #define init_module(mod, len, opts) syscall(SYS_init_module, mod, len, opts) 25 26 void insmod_main(void) 27 { 28 int fd = xopenro(*toys.optargs); 29 int i, rc; 30 31 i = 1; 32 while (toys.optargs[i] && 33 strlen(toybuf) + strlen(toys.optargs[i]) + 2 < sizeof(toybuf)) 34 { 35 strcat(toybuf, toys.optargs[i++]); 36 strcat(toybuf, " "); 37 } 38 39 // finit_module was new in Linux 3.8, and doesn't work on stdin, 40 // so we fall back to init_module if necessary. 41 rc = finit_module(fd, toybuf, 0); 42 if (rc && (fd == 0 || errno == ENOSYS)) { 43 off_t len = 0; 44 char *path = !strcmp(*toys.optargs, "-") ? "/dev/stdin" : *toys.optargs; 45 char *buf = readfileat(AT_FDCWD, path, NULL, &len); 46 47 rc = init_module(buf, len, toybuf); 48 if (CFG_TOYBOX_FREE) free(buf); 49 } 50 51 if (rc) perror_exit("failed to load %s", toys.optargs[0]); 52 53 if (CFG_TOYBOX_FREE) close(fd); 54 } 55
