Mercurial > hg > toybox
changeset 488:9e64ca0e3b79
Adding mknod
author | Elie De Brauwer <eliedebrauwer@gmail.com> |
---|---|
date | Mon, 13 Feb 2012 19:58:48 +0100 |
parents | 9c43d4191337 |
children | d473dff476e2 |
files | toys/mknod.c |
diffstat | 1 files changed, 51 insertions(+), 0 deletions(-) [+] |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/toys/mknod.c Mon Feb 13 19:58:48 2012 +0100 @@ -0,0 +1,51 @@ +/* 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]); + +}