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