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path: root/i/pc104/initrd/conf/busybox/util-linux/losetup.c
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Diffstat (limited to 'i/pc104/initrd/conf/busybox/util-linux/losetup.c')
-rw-r--r--i/pc104/initrd/conf/busybox/util-linux/losetup.c65
1 files changed, 65 insertions, 0 deletions
diff --git a/i/pc104/initrd/conf/busybox/util-linux/losetup.c b/i/pc104/initrd/conf/busybox/util-linux/losetup.c
new file mode 100644
index 0000000..b220c98
--- /dev/null
+++ b/i/pc104/initrd/conf/busybox/util-linux/losetup.c
@@ -0,0 +1,65 @@
+/* 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);
+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;
+}