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annotate toys/other/insmod.c @ 1518:4bfbd8b96f66 draft

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Various bugfixes (mostly resource leaks) from Ashwini Sharma's static analysis, plus occasional tweak by me while reviewing them.
author Rob Landley <rob@landley.net>
date Thu, 09 Oct 2014 13:43:32 -0500
parents 786841fdb1e0
children 57f2a26fa92c
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1 /* insmod.c - Load a module into the Linux kernel.
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2 *
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3 * Copyright 2012 Elie De Brauwer <eliedebrauwer@gmail.com>
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4
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5 USE_INSMOD(NEWTOY(insmod, "<1", TOYFLAG_BIN|TOYFLAG_NEEDROOT))
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7 config INSMOD
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8 bool "insmod"
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9 default y
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10 help
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11 usage: insmod MODULE [MODULE_OPTIONS]
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13 Load the module named MODULE passing options if given.
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14 */
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16 #include "toys.h"
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18 #include <sys/syscall.h>
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19 #define init_module(mod, len, opts) syscall(__NR_init_module, mod, len, opts)
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20
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21 void insmod_main(void)
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22 {
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23 char * buf = NULL;
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24 int len, res, i;
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25 int fd = xopen(*toys.optargs, O_RDONLY);
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27 len = fdlength(fd);
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28 buf = xmalloc(len);
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29 xreadall(fd, buf, len);
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31 i = 1;
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32 while(toys.optargs[i] &&
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33 strlen(toybuf) + strlen(toys.optargs[i]) + 2 < sizeof(toybuf))
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34 {
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35 strcat(toybuf, toys.optargs[i++]);
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36 strcat(toybuf, " ");
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37 }
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39 res = init_module(buf, len, toybuf);
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40 if (CFG_TOYBOX_FREE) {
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41 if (buf != toybuf) free(buf);
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42 close(fd);
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43 }
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45 if (res) perror_exit("failed to load %s", toys.optargs[0]);
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46 }