82 lines
1.6 KiB
C
82 lines
1.6 KiB
C
#include <sys/sysmacros.h>
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#include <sys/stat.h>
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#include <string.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <stdio.h>
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unsigned int parse_int(const char *str) {
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char *ptr = NULL;
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unsigned int value = (unsigned int)strtol(str, &ptr, 10);
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if (*ptr) {
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fprintf(stderr, "mknod: not a number: %s\n", str);
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exit(1);
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}
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else if (value < 1) {
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fprintf(stderr, "mknod: number is negative: %s\n", str);
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exit(1);
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}
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return value;
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}
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int main(const int argc, const char **argv) {
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mode_t mode = 0666;
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int i;
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for (i = 1; i < argc; i++) {
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if (argv[i][0] != '-')
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break;
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else if (!strncmp("-m=", argv[i], 3)) {
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char *ptr = NULL;
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mode = (mode_t)strtol(argv[i] + 3, &ptr, 8);
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if (*ptr) {
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fprintf(stderr, "mknod: invalid mode %s\n", argv[i] + 3);
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return 1;
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}
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}
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}
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unsigned int major = 0;
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unsigned int minor = 0;
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dev_t dev = 0;
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if (argc - i >= 2 && argc - i != 3) {
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if (argc - i == 4) {
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major = parse_int(argv[i + 2]);
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minor = parse_int(argv[i + 3]);
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dev = makedev(major, minor);
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}
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if (!strncmp("b", argv[i + 1], 1))
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mode |= S_IFBLK;
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else if (!strncmp("c", argv[i + 1], 1) || !strncmp("u", argv[i + 1], 1))
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mode |= S_IFCHR;
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else if (!strncmp("p", argv[i + 1], 1))
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mode |= S_IFIFO;
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else if (!strncmp("s", argv[i + 1], 1))
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mode |= S_IFSOCK;
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if (mknod(argv[i], mode, dev) < 0) {
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fprintf(stderr, "mknod: %s\n", strerror(errno));
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return 1;
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}
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}
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else {
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printf("mknod [-m=mode] [NAME] [TYPE] [MAJOR MINOR]\n");
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printf("Types:\n b - block deviece\n c or u - character device\n p - named pipe (MAJOR MINOR must be omitted)\n s - socket\n");
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return 0;
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}
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return 0;
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}
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