Загрузить файлы в «src»

src/ln.c

@@ -25,8 +25,8 @@ int main(const int argc, const char **argv) {
 			s_flag = 1;
 
 		else {
-			fprintf(stderr, "ln: invalid argument: %s\n", argv[i]);
-			return 1;
+			printf("ln [-s] [TARGET] [LINK/DIR]\n");
+			return 0;
 		}
 	}
 

src/mknod.c

@@ -0,0 +1,81 @@
+#include <sys/sysmacros.h>
+#include <sys/stat.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <stdio.h>
+
+unsigned int parse_int(const char *str) {
+	char *ptr = NULL;
+	unsigned int value = (unsigned int)strtol(str, &ptr, 10);
+
+	if (*ptr) {
+		fprintf(stderr, "mknod: not a number: %s\n", str);
+		exit(1);
+	}
+
+	else if (value < 1) {
+		fprintf(stderr, "mknod: number is negative: %s\n", str);
+		exit(1);
+	}
+
+	return value;
+}
+
+int main(const int argc, const char **argv) {
+	mode_t mode = 0666;
+
+	int i;
+	for (i = 1; i < argc; i++) {
+		if (argv[i][0] != '-')
+			break;
+
+		else if (!strncmp("-m=", argv[i], 3)) {
+			char *ptr = NULL;
+			mode = (mode_t)strtol(argv[i] + 3, &ptr, 8);
+			if (*ptr) {
+				fprintf(stderr, "mknod: invalid mode %s\n", argv[i] + 3);
+				return 1;
+			}
+		}
+	}
+
+	unsigned int major = 0;
+	unsigned int minor = 0;
+	dev_t dev = 0;
+
+	if (argc - i >= 2 && argc - i != 3) {
+		if (argc - i == 4) {
+			major = parse_int(argv[i + 2]);
+			minor = parse_int(argv[i + 3]);
+			dev = makedev(major, minor);
+		}
+
+
+		if (!strncmp("b", argv[i + 1], 1))
+			mode |= S_IFBLK;
+
+		else if (!strncmp("c", argv[i + 1], 1) || !strncmp("u", argv[i + 1], 1))
+			mode |= S_IFCHR;
+
+		else if (!strncmp("p", argv[i + 1], 1))
+			mode |= S_IFIFO;
+
+		else if (!strncmp("s", argv[i + 1], 1))
+			mode |= S_IFSOCK;
+
+		if (mknod(argv[i], mode, dev) < 0) {
+			fprintf(stderr, "mknod: %s\n", strerror(errno));
+			return 1;
+		}
+
+	}
+
+	else {
+		printf("mknod [-m=mode] [NAME] [TYPE] [MAJOR MINOR]\n");
+		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");
+		return 0;
+	}
+
+	return 0;
+}