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annotate toys/insmod.c @ 489:d473dff476e2

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Adding insmod and rmmod
author Elie De Brauwer <eliedebrauwer@gmail.com>
date Sat, 18 Feb 2012 13:25:36 +0100
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d473dff476e2 Adding insmod and rmmod
Elie De Brauwer <eliedebrauwer@gmail.com>
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1 /* vi: set sw=4 ts=4:
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2 *
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3 * insmod.c - Load a module into the Linux kernel.
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4 *
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5 * Copyright 2012 Elie De Brauwer <eliedebrauwer@gmail.com>
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6 *
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7 * Not in SUSv4.
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8
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9 USE_INSMOD(NEWTOY(insmod, "<1", TOYFLAG_BIN|TOYFLAG_NEEDROOT))
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10
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11 config INSMOD
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12 bool "insmod"
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13 default y
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14 help
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15 usage: insmod MODULE [MODULE_OPTIONS]
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16
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17 Load the module named MODULE passing options if given.
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18 */
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19
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20 #include "toys.h"
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21
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22 #include <sys/syscall.h>
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23 #define init_module(mod, len, opts) syscall(__NR_init_module, mod, len, opts)
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24
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25 void insmod_main(void)
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26 {
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27 char * buf = NULL;
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28 int len, res, i;
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29 int fd = xopen(toys.optargs[0], O_RDONLY);
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30
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31 len = fdlength(fd);
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32 buf = xmalloc(len);
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33 xreadall(fd, buf, len);
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34
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35 i = 1;
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36 while(toys.optargs[i] &&
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37 strlen(toybuf) + strlen(toys.optargs[i]) + 2 < sizeof(toybuf)) {
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38 strcat(toybuf, toys.optargs[i++]);
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39 strcat(toybuf, " ");
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40 }
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41
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42 res = init_module(buf, len, toybuf);
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43 if (CFG_TOYBOX_FREE && buf != toybuf) free(buf);
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44
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45 if (res)
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46 perror_exit("failed to load %s", toys.optargs[0]);
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47 }