view toys/lsb/mknod.c @ 674:7e846e281e38

New build infrastructure to generate FLAG_ macros and TT alias, #define FOR_commandname before #including toys.h to trigger it. Rename DEFINE_GLOBALS() to just GLOBALS() (because I could never remember if it was DECLARE_GLOBALS). Convert existing commands to use new infrastructure, and replace optflag constants with FLAG_ macros where appropriate.
author Rob Landley <>
date Mon, 08 Oct 2012 00:02:30 -0500
parents 40bc0523ae61
children 786841fdb1e0
line wrap: on
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/* vi: set sw=4 ts=4:
 * mknod.c - make block or character special file
 * Copyright 2012 Elie De Brauwer <>


config MKNOD
	bool "mknod"
	default y
	  usage: mknod NAME TYPE [MAJOR MINOR]

	  Create a special file NAME with a given type, possible types are
	  b	block device
	  c or u	character device
	  p	named pipe (ignores MAJOR/MINOR)

#define FOR_mknod
#include "toys.h"

void mknod_main(void)
	mode_t modes[] = {S_IFIFO, S_IFCHR, S_IFCHR, S_IFBLK};
	int major=0, minor=0, type;
	int mode = 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]);