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Corinna Vinschen d5dcb484c7 Cygwin: lseek: check for file sparseness, not for mount point sparseness 
The code introducing the lseek(2) code for the GNU extensions
SEEK_DATA and SEEK_HOLE accidentally checks if the mount point
has the "sparse" flag set and, if not, emulates SEEK_DATA/SEEK_HOLE
per the Linux specs.

However, the mount point "sparse" flag only determines whether
files should be made sparse or not.  Files may be sparse independently
of that, obviously.

Fix that by checking for the FILE_ATTRIBUTE_SPARSE_FILE attribute
instead.

Fixes: edfa581d3c ("Cygwin: lseek: implement SEEK_DATA and SEEK_HOLE for files")
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
 		2023-11-25 18:07:23 +01:00
..
CVSChangeLogs.old
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cygserver Revert "sys/types.h: Don't include sys/_stdint.h" 2022-05-04 15:08:44 +02:00
cygwin Cygwin: lseek: check for file sparseness, not for mount point sparseness 2023-11-25 18:07:23 +01:00
doc Cygwin: Document /dev/disk/by-* subdirectories 2023-11-17 20:37:29 +01:00
testsuite Cygwin: testsuite: Tweak lseek03 after addition of SEEK_HOLE 2023-08-11 14:38:25 +01:00
utils Fix profiler error() definition and usage 2023-11-14 11:48:11 +01:00
CONTRIBUTORS Cygwin: Add Ben Wijen to list of contributors 2021-01-18 12:01:19 +01:00
COPYING
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COPYING.LIB
…
CYGWIN_LICENSE
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Makefile.am Cygwin: Conditionally build documentation 2021-12-17 22:28:16 +00:00
Makefile.am.common Cygwin: automake: change @INCLUDES@ to @AM_CPPFLAGS@ to avoid warnings 2021-04-29 11:28:14 +02:00
README
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acinclude.m4 Cygwin: Reorganize cygwin source dir 2022-08-05 12:02:11 +02:00
autogen.sh Cygwin: autogen.sh: Allow running from any directory 2021-05-06 10:56:20 +02:00
configure.ac Cygwin: testsuite: Drop using DejaGnu to run tests 2023-07-22 17:16:37 +01:00

README 

THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESSED OR
IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

Cygwin documentation is available on the net at https://cygwin.com
You might especially be interested in

https://cygwin.com/faq/faq.html#faq.programming.building-cygwin