w32api:

        * include/winioctl.h (FSCTL_SET_SPARSE): Define.

cygwin:

        * wincap.h (wincaps::supports_sparse_files): New flag.
        (wincapc::supports_sparse_files): New method.
        * wincap.cc (wincap_unknown): Define value for the new flag.
        (wincap_95): Ditto.
        (wincap_95osr2): Ditto.
        (wincap_98): Ditto.
        (wincap_98se): Ditto.
        (wincap_me): Ditto.
        (wincap_nt3): Ditto.
        (wincap_nt4): Ditto.
        (wincap_nt4sp4): Ditto.
        (wincap_2000): Ditto.
        (wincap_xp): Ditto.
        * path.h (path_conv::fs_flags): New method.
        * fhandler_disk_file.cc: Include winioctl.h for DeviceIoControl.
        (fhandler_disk_file::open): Set newly created and truncated files as
        sparse on platforms that support it.

1 files changed, 22 insertions, 11 deletions

diff --git a/winsup/cygwin/wincap.cc b/winsup/cygwin/wincap.cc
index e70a362da..b5671c558 100644
--- a/winsup/cygwin/wincap.cc
+++ b/winsup/cygwin/wincap.cc
@@ -47,7 +47,8 @@ static NO_COPY wincaps wincap_unknown = {
   has_64bit_file_access:false,
   has_process_io_counters:false,
   supports_reading_modem_output_lines:false,
-  needs_memory_protection:false
+  needs_memory_protection:false,
+  supports_sparse_files:false
 };
 
 static NO_COPY wincaps wincap_95 = {
@@ -86,7 +87,8 @@ static NO_COPY wincaps wincap_95 = {
   has_64bit_file_access:false,
   has_process_io_counters:false,
   supports_reading_modem_output_lines:false,
-  needs_memory_protection:false
+  needs_memory_protection:false,
+  supports_sparse_files:false
 };
 
 static NO_COPY wincaps wincap_95osr2 = {
@@ -125,7 +127,8 @@ static NO_COPY wincaps wincap_95osr2 = {
   has_64bit_file_access:false,
   has_process_io_counters:false,
   supports_reading_modem_output_lines:false,
-  needs_memory_protection:false
+  needs_memory_protection:false,
+  supports_sparse_files:false
 };
 
 static NO_COPY wincaps wincap_98 = {
@@ -164,7 +167,8 @@ static NO_COPY wincaps wincap_98 = {
   has_64bit_file_access:false,
   has_process_io_counters:false,
   supports_reading_modem_output_lines:false,
-  needs_memory_protection:false
+  needs_memory_protection:false,
+  supports_sparse_files:false
 };
 
 static NO_COPY wincaps wincap_98se = {
@@ -203,7 +207,8 @@ static NO_COPY wincaps wincap_98se = {
   has_64bit_file_access:false,
   has_process_io_counters:false,
   supports_reading_modem_output_lines:false,
-  needs_memory_protection:false
+  needs_memory_protection:false,
+  supports_sparse_files:false
 };
 
 static NO_COPY wincaps wincap_me = {
@@ -242,7 +247,8 @@ static NO_COPY wincaps wincap_me = {
   has_64bit_file_access:false,
   has_process_io_counters:false,
   supports_reading_modem_output_lines:false,
-  needs_memory_protection:false
+  needs_memory_protection:false,
+  supports_sparse_files:false
 };
 
 static NO_COPY wincaps wincap_nt3 = {
@@ -281,7 +287,8 @@ static NO_COPY wincaps wincap_nt3 = {
   has_64bit_file_access:true,
   has_process_io_counters:false,
   supports_reading_modem_output_lines:true,
-  needs_memory_protection:true
+  needs_memory_protection:true,
+  supports_sparse_files:false
 };
 
 static NO_COPY wincaps wincap_nt4 = {
@@ -320,7 +327,8 @@ static NO_COPY wincaps wincap_nt4 = {
   has_64bit_file_access:true,
   has_process_io_counters:false,
   supports_reading_modem_output_lines:true,
-  needs_memory_protection:true
+  needs_memory_protection:true,
+  supports_sparse_files:false
 };
 
 static NO_COPY wincaps wincap_nt4sp4 = {
@@ -359,7 +367,8 @@ static NO_COPY wincaps wincap_nt4sp4 = {
   has_64bit_file_access:true,
   has_process_io_counters:false,
   supports_reading_modem_output_lines:true,
-  needs_memory_protection:true
+  needs_memory_protection:true,
+  supports_sparse_files:false
 };
 
 static NO_COPY wincaps wincap_2000 = {
@@ -398,7 +407,8 @@ static NO_COPY wincaps wincap_2000 = {
   has_64bit_file_access:true,
   has_process_io_counters:true,
   supports_reading_modem_output_lines:true,
-  needs_memory_protection:true
+  needs_memory_protection:true,
+  supports_sparse_files:true
 };
 
 static NO_COPY wincaps wincap_xp = {
@@ -437,7 +447,8 @@ static NO_COPY wincaps wincap_xp = {
   has_64bit_file_access:true,
   has_process_io_counters:true,
   supports_reading_modem_output_lines:true,
-  needs_memory_protection:true
+  needs_memory_protection:true,
+  supports_sparse_files:true
 };
 
 wincapc wincap;