| /* 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]); |
| |
| } |