Skip to content
Projects
Groups
Snippets
Help
This project
Loading...
Sign in / Register
Toggle navigation
W
wine-winehq
Project
Project
Details
Activity
Cycle Analytics
Repository
Repository
Files
Commits
Branches
Tags
Contributors
Graph
Compare
Charts
Issues
0
Issues
0
List
Board
Labels
Milestones
Merge Requests
0
Merge Requests
0
CI / CD
CI / CD
Pipelines
Jobs
Schedules
Charts
Registry
Registry
Wiki
Wiki
Snippets
Snippets
Members
Members
Collapse sidebar
Close sidebar
Activity
Graph
Charts
Create a new issue
Jobs
Commits
Issue Boards
Open sidebar
wine
wine-winehq
Commits
86e5efb6
Commit
86e5efb6
authored
Jan 29, 2002
by
Alexandre Julliard
Browse files
Options
Browse Files
Download
Email Patches
Plain Diff
Work around ftruncate implementations that don't support extending
files.
parent
5d93b6ed
Hide whitespace changes
Inline
Side-by-side
Showing
1 changed file
with
41 additions
and
17 deletions
+41
-17
file.c
server/file.c
+41
-17
No files found.
server/file.c
View file @
86e5efb6
...
...
@@ -456,29 +456,46 @@ static int set_file_pointer( handle_t handle, unsigned int *low, int *high, int
return
1
;
}
static
int
truncate_file
(
handle_t
handle
)
/* extend a file beyond the current end of file */
static
int
extend_file
(
struct
file
*
file
,
off_t
size
)
{
struct
file
*
file
;
off_t
result
;
static
const
char
zero
;
if
(
!
(
file
=
get_file_obj
(
current
->
process
,
handle
,
GENERIC_WRITE
)))
return
0
;
if
((
(
result
=
lseek
(
file
->
obj
.
fd
,
0
,
SEEK_CUR
))
==
-
1
)
||
(
ftruncate
(
file
->
obj
.
fd
,
result
)
=
=
-
1
))
/* extend the file one byte beyond the requested size and then truncate it */
/* this should work around ftruncate implementations that can't extend files */
if
((
lseek
(
file
->
obj
.
fd
,
size
,
SEEK_SET
)
!=
-
1
)
&&
(
write
(
file
->
obj
.
fd
,
&
zero
,
1
)
!
=
-
1
))
{
file_set_error
();
release_object
(
file
);
return
0
;
ftruncate
(
file
->
obj
.
fd
,
size
);
return
1
;
}
release_object
(
file
);
return
1
;
file_set_error
();
return
0
;
}
/* truncate file at current position */
static
int
truncate_file
(
struct
file
*
file
)
{
int
ret
=
0
;
off_t
pos
=
lseek
(
file
->
obj
.
fd
,
0
,
SEEK_CUR
);
off_t
eof
=
lseek
(
file
->
obj
.
fd
,
0
,
SEEK_END
);
if
(
eof
<
pos
)
ret
=
extend_file
(
file
,
pos
);
else
{
if
(
ftruncate
(
file
->
obj
.
fd
,
pos
)
!=
-
1
)
ret
=
1
;
else
file_set_error
();
}
lseek
(
file
->
obj
.
fd
,
pos
,
SEEK_SET
);
/* restore file pos */
return
ret
;
}
/* try to grow the file to the specified size */
int
grow_file
(
struct
file
*
file
,
int
size_high
,
int
size_low
)
{
int
ret
=
0
;
struct
stat
st
;
off_t
size
=
size_low
+
(((
off_t
)
size_high
)
<<
32
);
off_t
old_pos
,
size
=
size_low
+
(((
off_t
)
size_high
)
<<
32
);
if
(
fstat
(
file
->
obj
.
fd
,
&
st
)
==
-
1
)
{
...
...
@@ -486,9 +503,10 @@ int grow_file( struct file *file, int size_high, int size_low )
return
0
;
}
if
(
st
.
st_size
>=
size
)
return
1
;
/* already large enough */
if
(
ftruncate
(
file
->
obj
.
fd
,
size
)
!=
-
1
)
return
1
;
file_set_error
();
return
0
;
old_pos
=
lseek
(
file
->
obj
.
fd
,
0
,
SEEK_CUR
);
/* save old pos */
ret
=
extend_file
(
file
,
size
);
lseek
(
file
->
obj
.
fd
,
old_pos
,
SEEK_SET
);
/* restore file pos */
return
ret
;
}
static
int
set_file_time
(
handle_t
handle
,
time_t
access_time
,
time_t
write_time
)
...
...
@@ -604,7 +622,13 @@ DECL_HANDLER(set_file_pointer)
/* truncate (or extend) a file */
DECL_HANDLER
(
truncate_file
)
{
truncate_file
(
req
->
handle
);
struct
file
*
file
;
if
((
file
=
get_file_obj
(
current
->
process
,
req
->
handle
,
GENERIC_WRITE
)))
{
truncate_file
(
file
);
release_object
(
file
);
}
}
/* flush a file buffers */
...
...
Write
Preview
Markdown
is supported
0%
Try again
or
attach a new file
Attach a file
Cancel
You are about to add
0
people
to the discussion. Proceed with caution.
Finish editing this message first!
Cancel
Please
register
or
sign in
to comment