1 files changed, 64 insertions, 0 deletions

diff --git a/util-linux/losetup.c b/util-linux/losetup.c
new file mode 100644
index 000000000..c7eb85a91
--- /dev/null
+++ b/util-linux/losetup.c
@@ -0,0 +1,64 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini losetup implementation for busybox
+ *
+ * Copyright (C) 2002  Matt Kraai.
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+
+#include <getopt.h>
+#include <stdlib.h>
+
+#include "busybox.h"
+
+int losetup_main(int argc, char **argv)
+{
+        unsigned opt;
+        char *opt_o;
+        unsigned long long offset = 0;
+
+        opt = getopt32(argc, argv, "do:", &opt_o);
+        argc -= optind;
+        argv += optind;
+
+        if (opt == 0x3) // -d + -o (illegal)
+                bb_show_usage();
+
+        if (opt == 0x1) { // -d
+                /* detach takes exactly one argument */
+                if (argc != 1)
+                        bb_show_usage();
+                if (!del_loop(argv[0]))
+                        return EXIT_SUCCESS;
+                bb_perror_nomsg_and_die();
+        }
+
+        if (opt == 0x2) // -o
+                offset = xatoull(opt_o);
+
+        /* -o or no option */
+
+        if (argc == 2) {
+                if (set_loop(&argv[0], argv[1], offset) < 0)
+                        bb_perror_nomsg_and_die();
+        } else if (argc == 1) {
+                char *s = query_loop(argv[0]);
+                if (!s) bb_perror_nomsg_and_die();
+                printf("%s: %s\n", argv[0], s);
+                if (ENABLE_FEATURE_CLEAN_UP) free(s);
+        } else {
+                char dev[sizeof(LOOP_NAME"0")] = LOOP_NAME"0";
+                char c;
+                for (c = '0'; c <= '9'; ++c) {
+                        char *s;
+                        dev[sizeof(LOOP_NAME"0")-2] = c;
+                        s = query_loop(dev);
+                        if (s) {
+                                printf("%s: %s\n", dev, s);
+                                if (ENABLE_FEATURE_CLEAN_UP) free(s);
+                        }
+                }
+        }
+        return EXIT_SUCCESS;
+}