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/* vi: set sw=4 ts=4:
*
* mknod.c - make block or character special file
*
* Copyright 2012 Elie De Brauwer <eliedebrauwer@gmail.com>
*
* Not in SUSv3.
USE_MKNOD(NEWTOY(mknod, "<2>4", TOYFLAG_BIN))
config MKNOD
bool "mknod"
default y
help
usage: mknod NAME TYPE [MAJOR MINOR]
Create a special file NAME with a given type, possible types are
b create a block device with the given MAJOR/MINOR
c or u create a character device with the given MAJOR/MINOR
p create a named pipe ignoring MAJOR/MINOR
*/
#include "toys.h"
static const char modes_char[] = {'p', 'c', 'u', 'b'};
static const mode_t modes[] = {S_IFIFO, S_IFCHR, S_IFCHR, S_IFBLK};
void mknod_main(void)
{
int major=0, minor=0, type;
char * tmp;
int mode = 0660;
tmp = strchr(modes_char, toys.optargs[1][0]);
if (!tmp)
perror_exit("unknown special device type %c", toys.optargs[1][0]);
type = modes[tmp-modes_char];
if (type == S_IFCHR || type == S_IFBLK) {
if (toys.optc != 4)
perror_exit("creating a block/char device requires major/minor");
major = atoi(toys.optargs[2]);
minor = atoi(toys.optargs[3]);
}
if (mknod(toys.optargs[0], mode | type, makedev(major, minor)))
perror_exit("mknod %s failed", toys.optargs[0]);
}
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