added readlink

src/coreutils/cp/cp.c

@@ -185,7 +185,7 @@ int main(int argc, char **argv) {
 				break;
 
 			default:
-				printf("cp [rfv] [src1 src2...] [dst]\n\t-f Silent\n\t-r Recursive\n\t-v Verbose\n\t-L Follow all symlinks\n");
+				printf("cp [frvL] [src1 src2...] [dst]\n\t-f Silent\n\t-r Recursive\n\t-v Verbose\n\t-L Follow all symlinks\n");
 				return 0;
 		}
 	}

src/coreutils/readlink/build.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+project_dir=$(pwd)
+echo ./*.c $CFLAGS -o $OUTPUT$(basename $project_dir) | xargs $CC

src/coreutils/readlink/readlink.c

@@ -0,0 +1,48 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <limits.h>
+#include <errno.h>
+
+int main(int argc, char **argv) {
+	char n_flag = 0;
+
+	int opt;
+	while ((opt = getopt(argc, argv, "n")) != -1) {
+		switch (opt) {
+			case 'n':
+				n_flag = 1;
+				break;
+
+			default:
+				printf("readlink [n] [file1 file2...]\n\t-n Don't add newline\n");
+				return 0;
+		}
+	}
+
+	argv += optind;
+	argc -= optind;
+
+	for (int i = 0; i < argc; i++) {
+		char path[PATH_MAX + 1];
+		ssize_t r = readlink(argv[i], path, sizeof(path));
+		if (r < 0) {
+			fprintf(stderr, "readlink: %s: %s\n", argv[i], strerror(errno));
+			return 1;
+		}
+
+		if (r > (ssize_t)sizeof(path)) {
+			fprintf(stderr, "readlink: %s: path too long\n", argv[i]);
+			return 1;
+		}
+
+		if (n_flag)
+			fputs(path, stdout);
+
+		else
+			puts(path);
+	}
+
+	return 0;
+}