96 lines
3 KiB
C
96 lines
3 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2014, The Android Open Source Project
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or without
|
||
|
|
* modification, are permitted provided that the following conditions
|
||
|
|
* are met:
|
||
|
|
* * Redistributions of source code must retain the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer.
|
||
|
|
* * Redistributions in binary form must reproduce the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer in
|
||
|
|
* the documentation and/or other materials provided with the
|
||
|
|
* distribution.
|
||
|
|
* * Neither the name of Google, Inc. nor the names of its contributors
|
||
|
|
* may be used to endorse or promote products derived from this
|
||
|
|
* software without specific prior written permission.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
||
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
||
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
|
||
|
|
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||
|
|
* SUCH DAMAGE.
|
||
|
|
*/
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <sys/stat.h>
|
||
|
|
|
||
|
|
static int print_usage() {
|
||
|
|
fprintf(stderr, "mknod <path> [b|c|u|p] <major> <minor>\n");
|
||
|
|
return EXIT_FAILURE;
|
||
|
|
}
|
||
|
|
|
||
|
|
int mknod_main(int argc, char **argv) {
|
||
|
|
char *path = NULL;
|
||
|
|
int major = 0;
|
||
|
|
int minor = 0;
|
||
|
|
int args = 0;
|
||
|
|
mode_t mode = 0660;
|
||
|
|
|
||
|
|
/* Check correct argument count is 3 or 5 */
|
||
|
|
if (argc != 3 && argc != 5) {
|
||
|
|
fprintf(stderr, "Incorrect argument count\n");
|
||
|
|
return print_usage();
|
||
|
|
}
|
||
|
|
|
||
|
|
path = argv[1];
|
||
|
|
|
||
|
|
const char node_type = *argv[2];
|
||
|
|
switch (node_type) {
|
||
|
|
case 'b':
|
||
|
|
mode |= S_IFBLK;
|
||
|
|
args = 5;
|
||
|
|
break;
|
||
|
|
case 'c':
|
||
|
|
case 'u':
|
||
|
|
mode |= S_IFCHR;
|
||
|
|
args = 5;
|
||
|
|
break;
|
||
|
|
case 'p':
|
||
|
|
mode |= S_IFIFO;
|
||
|
|
args = 3;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
fprintf(stderr, "Invalid node type '%c'\n", node_type);
|
||
|
|
return print_usage();
|
||
|
|
}
|
||
|
|
|
||
|
|
if (argc != args) {
|
||
|
|
if (args == 5) {
|
||
|
|
fprintf(stderr, "Node type '%c' requires <major> and <minor>\n", node_type);
|
||
|
|
} else {
|
||
|
|
fprintf(stderr, "Node type '%c' does not require <major> and <minor>\n", node_type);
|
||
|
|
}
|
||
|
|
return print_usage();
|
||
|
|
}
|
||
|
|
|
||
|
|
if (args == 5) {
|
||
|
|
major = atoi(argv[3]);
|
||
|
|
minor = atoi(argv[4]);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (mknod(path, mode, makedev(major, minor))) {
|
||
|
|
perror("Unable to create node");
|
||
|
|
return EXIT_FAILURE;
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|