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/* mknod.c - make block or character special file
*
* Copyright 2012 Elie De Brauwer <eliedebrauwer@gmail.com>
*
* http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/mknod.html
USE_MKNOD(NEWTOY(mknod, "<2>4m(mode):", TOYFLAG_BIN|TOYFLAG_UMASK))
config MKNOD
bool "mknod"
default y
help
usage: mknod [-m MODE] NAME TYPE [MAJOR MINOR]
Create a special file NAME with a given type. TYPE is b for block device,
c or u for character device, p for named pipe (which ignores MAJOR/MINOR).
-m Mode (file permissions) of new device, in octal or u+x format
*/
#define FOR_mknod
#include "toys.h"
GLOBALS(
char *m;
)
void mknod_main(void)
{
mode_t modes[] = {S_IFIFO, S_IFCHR, S_IFCHR, S_IFBLK};
int major=0, minor=0, type;
int mode = TT.m ? string_to_mode(TT.m, 0777) : 0660;
type = stridx("pcub", *toys.optargs[1]);
if (type == -1) perror_exit("bad type '%c'", *toys.optargs[1]);
if (type) {
if (toys.optc != 4) perror_exit("need major/minor");
major = atoi(toys.optargs[2]);
minor = atoi(toys.optargs[3]);
}
if (mknod(toys.optargs[0], mode | modes[type], makedev(major, minor)))
perror_exit("mknod %s failed", toys.optargs[0]);
}
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