* fhandler_tape.cc (mtinfo_drive::create_partitions): Allow partitioning

	of drives supporting select partitions.
	(mtinfo_drive::get_status): Fill in current partition and number of
	partitions on tape into mt_resid.
	* include/cygwin/mtio.h (struct mtget): Align mt_resid comment to
	aforementioned change.
	* include/cygwin/version.h (CYGWIN_VERSION_API_MINOR): Bump.

5 files changed, 30 insertions, 6 deletions

diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index 83fc78955..b42a8c641 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,13 @@
+2013-08-21  Corinna Vinschen  <corinna@vinschen.de>
+
+	* fhandler_tape.cc (mtinfo_drive::create_partitions): Allow partitioning
+	of drives supporting select partitions.
+	(mtinfo_drive::get_status): Fill in current partition and number of
+	partitions on tape into mt_resid.
+	* include/cygwin/mtio.h (struct mtget): Align mt_resid comment to
+	aforementioned change.
+	* include/cygwin/version.h (CYGWIN_VERSION_API_MINOR): Bump.
+
 2013-08-20  Corinna Vinschen  <corinna@vinschen.de>
 
 	* fhandler_tape.cc (mtinfo_drive::create_partitions): Fix long-standing
diff --git a/winsup/cygwin/fhandler_tape.cc b/winsup/cygwin/fhandler_tape.cc
index 8002b955d..969ee7653 100644
--- a/winsup/cygwin/fhandler_tape.cc
+++ b/winsup/cygwin/fhandler_tape.cc
@@ -560,6 +560,11 @@ mtinfo_drive::create_partitions (HANDLE mt, int32_t count)
       TAPE_FUNC (CreateTapePartition (mt, TAPE_INITIATOR_PARTITIONS,
 				      count <= 0 ? 0 : 2, (DWORD) count));
     }
+  else if (get_feature (TAPE_DRIVE_SELECT))
+    {
+      TAPE_FUNC (CreateTapePartition (mt, TAPE_SELECT_PARTITIONS,
+				      count <= 0 ? 0 : 2, 0));
+    }
   else if (get_feature (TAPE_DRIVE_FIXED))
     {
       /* This is supposed to work for Tandberg SLR drivers up to version
@@ -798,7 +803,8 @@ mtinfo_drive::get_status (HANDLE mt, struct mtget *get)
 
   if (!notape)
     {
-      get->mt_resid = partition;
+      get->mt_resid = (partition & 0xffff)
+		      | ((mp ()->PartitionCount & 0xffff) << 16);
       get->mt_fileno = part (partition)->file;
       get->mt_blkno = part (partition)->fblock;
 
diff --git a/winsup/cygwin/include/cygwin/mtio.h b/winsup/cygwin/include/cygwin/mtio.h
index f18f27bd6..ae3aa8d33 100644
--- a/winsup/cygwin/include/cygwin/mtio.h
+++ b/winsup/cygwin/include/cygwin/mtio.h
@@ -1,6 +1,6 @@
 /* cygwin/mtio.h
 
-   Copyright 1999, 2000, 2001, 2004 Red Hat, Inc.
+   Copyright 1999, 2000, 2001, 2004, 2013 Red Hat, Inc.
 
    Written by Corinna Vinschen <corinna@vinschen.de>
 
@@ -85,9 +85,12 @@ struct	mtget {
 				 *	number of bytes ignored, or
 				 *	number of files not skipped, or
 				 *	number of records not skipped.
-				 *  Cygwin: remaining KB until 1.5.7.
-				 *          active partition since 1.5.8
-				 *          (same as on GNU-Linux).
+				 *  Cygwin:
+				 *      remaining KB until 1.5.7.
+				 *      active partition until 1.7.24.
+				 *      active partition in low 16 bits,
+				 *      number of partitions on this tape
+				 *      in next 16 bits, since 1.7.25.
 				 */
 	/* the following registers are device dependent */
 	long	mt_dsreg;	/* status register, Contains blocksize and
diff --git a/winsup/cygwin/include/cygwin/version.h b/winsup/cygwin/include/cygwin/version.h
index 6681a9955..e0c666bf9 100644
--- a/winsup/cygwin/include/cygwin/version.h
+++ b/winsup/cygwin/include/cygwin/version.h
@@ -439,12 +439,14 @@ details. */
       267: Export rawmemchr.
       268: Export GetCommandLineA, GetCommandLineW
       269: Allow application override of posix_memalign.
+      270: Redefine mtget.mt_resid field to contain current partition as well
+           as number of partitions on tape.
      */
 
      /* Note that we forgot to bump the api for ualarm, strtoll, strtoull */
 
 #define CYGWIN_VERSION_API_MAJOR 0
-#define CYGWIN_VERSION_API_MINOR 269
+#define CYGWIN_VERSION_API_MINOR 270
 
      /* There is also a compatibity version number associated with the
 	shared memory regions.  It is incremented when incompatible
diff --git a/winsup/cygwin/release/1.7.25 b/winsup/cygwin/release/1.7.25
index b3fb78043..6a1f55dbf 100644
--- a/winsup/cygwin/release/1.7.25
+++ b/winsup/cygwin/release/1.7.25
@@ -5,6 +5,9 @@ What's new:
 What changed:
 -------------
 
+- Redefine content of mtget tape info struct to allow fetching the number of
+  partitions on a tape.
+
 
 Bug fixes:
 ----------