symlink stuff

apps/ln.c

@@ -0,0 +1,60 @@
+/* vim: tabstop=4 shiftwidth=4 noexpandtab
+ * This file is part of ToaruOS and is released under the terms
+ * of the NCSA / University of Illinois License - see LICENSE.md
+ * Copyright (C) 2015 Mike Gerow
+ *               2018 K. Lange
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+
+static const char usage[] =
+"Usage: %s [-s] TARGET NAME\n"
+"    -s: Create a symbolic link.\n"
+"    -h: Print this help message and exit.\n";
+
+int main(int argc, char * argv[]) {
+	int symlink_flag = 0;
+
+	int c;
+	while ((c = getopt(argc, argv, "sh")) != -1) {
+		switch (c) {
+			case 's':
+				symlink_flag = 1;
+				break;
+			case 'h':
+				fprintf(stdout, usage, argv[0]);
+				exit(EXIT_SUCCESS);
+			default:
+				fprintf(stderr, usage, argv[0]);
+				exit(EXIT_FAILURE);
+		}
+	}
+	if (argc - optind < 2) {
+		fprintf(stderr, usage, argv[0]);
+		exit(EXIT_FAILURE);
+	}
+	char * target = argv[optind];
+	char * name = argv[optind + 1];
+
+	if (symlink_flag) {
+		if(symlink(target, name) < 0) {
+			fprintf(stderr, "%s: %s: %s\n", argv[0], name, strerror(errno));
+			exit(EXIT_FAILURE);
+		}
+		exit(EXIT_SUCCESS);
+	}
+
+#ifdef link
+	if (link(target, name) < 0) {
+		fprintf(stderr, "%s: %s: %s\n", argv[0], name, strerror(errno));
+		exit(EXIT_FAILURE);
+	}
+#else
+	fprintf(stderr, "%s: %s: hard link not supported\n", argv[0], name);
+#endif
+
+	exit(EXIT_SUCCESS);
+}

modules/tmpfs.c

@@ -74,6 +74,10 @@ static int symlink_tmpfs(fs_node_t * parent, char * target, char * name) {
 	debug_print(NOTICE, "symlink target is [%s]", target);
 	t->target = strdup(target);
 
+	t->mask = 0777;
+	t->uid = current_process->user;
+	t->gid = current_process->user;
+
 	spin_lock(tmpfs_lock);
 	list_insert(d->files, t);
 	spin_unlock(tmpfs_lock);