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annotate toys/lsb/mknod.c @ 667:40bc0523ae61

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Cleanup mknod.
author Rob Landley <rob@landley.net>
date Fri, 05 Oct 2012 23:33:36 -0500
parents 6df4ccc0acbe
children 7e846e281e38
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1 /* vi: set sw=4 ts=4:
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2 *
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3 * mknod.c - make block or character special file
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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 * http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/mknod.html
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8
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9 USE_MKNOD(NEWTOY(mknod, "<2>4", TOYFLAG_BIN))
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10
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11 config MKNOD
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12 bool "mknod"
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13 default y
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14 help
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15 usage: mknod NAME TYPE [MAJOR MINOR]
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16
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17 Create a special file NAME with a given type, possible types are
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18 b block device
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19 c or u character device
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20 p named pipe (ignores MAJOR/MINOR)
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21 */
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22
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23 #include "toys.h"
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24
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25 void mknod_main(void)
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26 {
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27 mode_t modes[] = {S_IFIFO, S_IFCHR, S_IFCHR, S_IFBLK};
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28 int major=0, minor=0, type;
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29 int mode = 0660;
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30
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31 type = stridx("pcub", *toys.optargs[1]);
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32 if (type == -1) perror_exit("bad type '%c'", *toys.optargs[1]);
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33 if (type) {
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34 if (toys.optc != 4) perror_exit("need major/minor");
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36 major = atoi(toys.optargs[2]);
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37 minor = atoi(toys.optargs[3]);
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38 }
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39
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40 if (mknod(toys.optargs[0], mode | modes[type], makedev(major, minor)))
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41 perror_exit("mknod %s failed", toys.optargs[0]);
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42
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43 }