* include/applets.h (CONFIG_LOSETUP): New.

* include/usage.h (losetup_trivial_usage, losetup_full_usage): New.
* util-linux/Makefile: Add losetup.o.
* util-linux/config.in: Add losetup prompt.
* util-linux/losetup.c: New.

include/applets.h

@@ -269,6 +269,9 @@
 #ifdef CONFIG_LOGREAD
 	APPLET(logread, logread_main, _BB_DIR_SBIN)
 #endif
+#ifdef CONFIG_LOSETUP
+	APPLET(losetup, losetup_main, _BB_DIR_SBIN)
+#endif
 #ifdef CONFIG_LS
 	APPLET(ls, ls_main, _BB_DIR_BIN)
 #endif

include/usage.h

@@ -989,6 +989,15 @@
 #define logread_full_usage \
         "Shows the messages from syslogd (using circular buffer)."
 
+#define losetup_trivial_usage \
+	"[OPTION]... LOOPDEVICE FILE\n" \
+	"or: losetup [OPTION]... -d LOOPDEVICE"
+#define losetup_full_usage \
+	"Associate LOOPDEVICE with FILE.\n\n" \
+	"Options:\n" \
+	"\t-d\t\tDisassociate LOOPDEVICE.\n" \
+	"\t-o OFFSET\tStart OFFSET bytes into FILE.\n"
+
 #ifdef CONFIG_FEATURE_LS_TIMESTAMPS
   #define USAGE_LS_TIMESTAMPS(a) a
 #else

util-linux/Makefile

@@ -31,6 +31,7 @@ obj-$(CONFIG_FREERAMDISK)	+= freeramdisk.o
 obj-$(CONFIG_FSCK_MINIX)	+= fsck_minix.o
 obj-$(CONFIG_GETOPT)		+= getopt.o
 obj-$(CONFIG_HEXDUMP)		+= hexdump.o
+obj-$(CONFIG_LOSETUP)		+= losetup.o
 obj-$(CONFIG_MKFS_MINIX)	+= mkfs_minix.o
 obj-$(CONFIG_MKSWAP)		+= mkswap.o
 obj-$(CONFIG_MORE)		+= more.o

util-linux/config.in

@@ -23,6 +23,7 @@ if [ "$CONFIG_FSCK_MINIX" = "y" -o "$CONFIG_MKFS_MINIX" = "y" ]; then
 fi
 bool 'getopt'		    CONFIG_GETOPT
 bool 'hexdump'  	    CONFIG_HEXDUMP  
+bool 'losetup'              CONFIG_LOSETUP
 bool 'mkswap'		    CONFIG_MKSWAP
 bool 'more'		    CONFIG_MORE
 if [ "$CONFIG_MORE" = "y" ]; then

util-linux/losetup.c

@@ -0,0 +1,58 @@
+/*
+ * Mini losetup implementation for busybox
+ *
+ * Copyright (C) 2002  Matt Kraai.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <getopt.h>
+#include <stdlib.h>
+
+#include "busybox.h"
+
+int
+losetup_main (int argc, char **argv)
+{
+  int delete = 0;
+  int offset = 0;
+  int opt;
+
+  while ((opt = getopt (argc, argv, "do:")) != -1)
+    switch (opt)
+      {
+      case 'd':
+	delete = 1;
+	break;
+
+      case 'o':
+	offset = parse_number (optarg, NULL);
+	break;
+
+      default:
+	show_usage ();
+      }
+
+  if ((delete && (offset || optind + 1 != argc))
+      || (!delete && optind + 2 != argc))
+    show_usage ();
+
+  if (delete)
+    return del_loop (argv[optind]) ? EXIT_SUCCESS : EXIT_FAILURE;
+  else
+    return set_loop (argv[optind], argv[optind + 1], offset, &opt)
+      ? EXIT_FAILURE : EXIT_SUCCESS;
+}