diff options
| author | Kirk Allan <kallan@suse.com> | 2015-11-10 16:19:11 -0700 |
|---|---|---|
| committer | Michael Roth <mdroth@linux.vnet.ibm.com> | 2015-11-11 10:21:02 -0600 |
| commit | 52074d0f662fc51293d4cde8077631f754784405 (patch) | |
| tree | 84027a52585955b142e0d0e889b7b8f867afa7c3 /qga/commands-win32.c | |
| parent | 3c07587d49458341510360557c849e93e9afaf59 (diff) | |
qga: fix append file open modes for win32
For append file open modes, use FILE_APPEND_DATA for the desired access
for writing at the end of the file.
Version 2:
For "a+", "ab+", and "a+b" modes use FILE_APPEND_DATA|GENERIC_READ.
ORing in GENERIC_READ starts a read at the begining of the file. All
writes will append to the end fo the file.
Added white space to maintain the alignment of the guest_file_open_modes[].
Signed-off-by: Kirk Allan <kallan@suse.com>
Cc: qemu-stable@nongnu.org
* use FILE_GENERIC_APPEND macro, which provides same semantics as
FILE_APPEND_DATA, but retains other flags from GENERIC_WRITE
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Diffstat (limited to 'qga/commands-win32.c')
| -rw-r--r-- | qga/commands-win32.c | 29 |
1 files changed, 15 insertions, 14 deletions
diff --git a/qga/commands-win32.c b/qga/commands-win32.c index a5306e76b0..41f6dd9fed 100644 --- a/qga/commands-win32.c +++ b/qga/commands-win32.c @@ -59,6 +59,7 @@ static struct { .filehandles = QTAILQ_HEAD_INITIALIZER(guest_file_state.filehandles), }; +#define FILE_GENERIC_APPEND (FILE_GENERIC_WRITE & ~FILE_WRITE_DATA) typedef struct OpenFlags { const char *forms; @@ -66,20 +67,20 @@ typedef struct OpenFlags { DWORD creation_disposition; } OpenFlags; static OpenFlags guest_file_open_modes[] = { - {"r", GENERIC_READ, OPEN_EXISTING}, - {"rb", GENERIC_READ, OPEN_EXISTING}, - {"w", GENERIC_WRITE, CREATE_ALWAYS}, - {"wb", GENERIC_WRITE, CREATE_ALWAYS}, - {"a", GENERIC_WRITE, OPEN_ALWAYS }, - {"r+", GENERIC_WRITE|GENERIC_READ, OPEN_EXISTING}, - {"rb+", GENERIC_WRITE|GENERIC_READ, OPEN_EXISTING}, - {"r+b", GENERIC_WRITE|GENERIC_READ, OPEN_EXISTING}, - {"w+", GENERIC_WRITE|GENERIC_READ, CREATE_ALWAYS}, - {"wb+", GENERIC_WRITE|GENERIC_READ, CREATE_ALWAYS}, - {"w+b", GENERIC_WRITE|GENERIC_READ, CREATE_ALWAYS}, - {"a+", GENERIC_WRITE|GENERIC_READ, OPEN_ALWAYS }, - {"ab+", GENERIC_WRITE|GENERIC_READ, OPEN_ALWAYS }, - {"a+b", GENERIC_WRITE|GENERIC_READ, OPEN_ALWAYS } + {"r", GENERIC_READ, OPEN_EXISTING}, + {"rb", GENERIC_READ, OPEN_EXISTING}, + {"w", GENERIC_WRITE, CREATE_ALWAYS}, + {"wb", GENERIC_WRITE, CREATE_ALWAYS}, + {"a", FILE_GENERIC_APPEND, OPEN_ALWAYS }, + {"r+", GENERIC_WRITE|GENERIC_READ, OPEN_EXISTING}, + {"rb+", GENERIC_WRITE|GENERIC_READ, OPEN_EXISTING}, + {"r+b", GENERIC_WRITE|GENERIC_READ, OPEN_EXISTING}, + {"w+", GENERIC_WRITE|GENERIC_READ, CREATE_ALWAYS}, + {"wb+", GENERIC_WRITE|GENERIC_READ, CREATE_ALWAYS}, + {"w+b", GENERIC_WRITE|GENERIC_READ, CREATE_ALWAYS}, + {"a+", FILE_GENERIC_APPEND|GENERIC_READ, OPEN_ALWAYS }, + {"ab+", FILE_GENERIC_APPEND|GENERIC_READ, OPEN_ALWAYS }, + {"a+b", FILE_GENERIC_APPEND|GENERIC_READ, OPEN_ALWAYS } }; static OpenFlags *find_open_flag(const char *mode_str) |