diff options
Diffstat (limited to 'toolbox/mknod.c')
-rw-r--r-- | toolbox/mknod.c | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/toolbox/mknod.c b/toolbox/mknod.c new file mode 100644 index 0000000..0fedece --- /dev/null +++ b/toolbox/mknod.c @@ -0,0 +1,95 @@ +/* + * 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; +} |