1 files changed, 51 insertions, 0 deletions
diff --git a/ln.c b/ln.c
new file mode 100644
index 0000000..f9b2e19
--- /dev/null
+++ b/ln.c
@@ -0,0 +1,51 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
+/*
+ * Copyright (C) 2022, 2023 Ferass El Hafidi <vitali64pmemail@protonmail.com>
+ */
+#include <unistd.h>
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+
+#define REQ_PRINT_USAGE /* Require print_usage() from common.h */
+#define REQ_ERRPRINT /* Require errprint() from common.h */
+#define DESCRIPTION "Link files."
+#define OPERANDS    "[-fs] [-P|-L] source_file target_file"
+#include "common.h"
+
+int  getopt(int argc, char *const argv[], const char *optstring);
+
+#ifdef FASESBOX
+int ln_main(int argc, char *argv[]) {
+#else
+int main(int argc, char *argv[]) {
+#endif
+	int argument;
+	char param[256], *buffer = NULL, *argv0 = strdup(argv[0]);
+
+	while ((argument = getopt(argc, argv, "fsPL")) != -1) {
+		if (argument == '?') {
+			print_usage(argv[0], DESCRIPTION, OPERANDS, VERSION);
+			return 1;
+		}
+		param[argument] = argument;
+	} argc -= optind; argv += optind;
+	if (argc != 2) {
+		print_usage(argv[0], DESCRIPTION, OPERANDS, VERSION);
+		return 1;
+	}
+	if (param['f']) remove(argv[1]);
+	if (errno && errno != ENOENT) return errprint(argv0, argv[0], errno);
+	errno = 0; /* Not reached if errno == ENOENT (no such file) */
+	if (param['s']) symlink(argv[0], argv[1]);
+	/* The -P option is the default behavior (at least on musl), 
+	 * so no if statement. 
+	 */
+	else if (param['L']) {
+		readlink(argv[0], buffer, strlen(buffer)); /* Read the link */
+		if (errno) return errprint(argv0, argv[0], errno);
+		link(buffer, argv[1]);
+	}
+	else link(argv[0], argv[1]);
+	return errprint(argv0, argv[0], errno);
+}