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>
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@ -59,6 +59,7 @@ static struct {
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.filehandles = QTAILQ_HEAD_INITIALIZER(guest_file_state.filehandles),
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.filehandles = QTAILQ_HEAD_INITIALIZER(guest_file_state.filehandles),
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};
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};
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#define FILE_GENERIC_APPEND (FILE_GENERIC_WRITE & ~FILE_WRITE_DATA)
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typedef struct OpenFlags {
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typedef struct OpenFlags {
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const char *forms;
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const char *forms;
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@ -70,16 +71,16 @@ static OpenFlags guest_file_open_modes[] = {
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{"rb", GENERIC_READ, OPEN_EXISTING},
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{"rb", GENERIC_READ, OPEN_EXISTING},
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{"w", GENERIC_WRITE, CREATE_ALWAYS},
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{"w", GENERIC_WRITE, CREATE_ALWAYS},
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{"wb", GENERIC_WRITE, CREATE_ALWAYS},
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{"wb", GENERIC_WRITE, CREATE_ALWAYS},
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{"a", GENERIC_WRITE, OPEN_ALWAYS },
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{"a", FILE_GENERIC_APPEND, OPEN_ALWAYS },
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{"r+", GENERIC_WRITE|GENERIC_READ, OPEN_EXISTING},
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{"r+", GENERIC_WRITE|GENERIC_READ, OPEN_EXISTING},
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{"rb+", GENERIC_WRITE|GENERIC_READ, OPEN_EXISTING},
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{"rb+", GENERIC_WRITE|GENERIC_READ, OPEN_EXISTING},
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{"r+b", GENERIC_WRITE|GENERIC_READ, OPEN_EXISTING},
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{"r+b", GENERIC_WRITE|GENERIC_READ, OPEN_EXISTING},
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{"w+", GENERIC_WRITE|GENERIC_READ, CREATE_ALWAYS},
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{"w+", GENERIC_WRITE|GENERIC_READ, CREATE_ALWAYS},
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{"wb+", GENERIC_WRITE|GENERIC_READ, CREATE_ALWAYS},
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{"wb+", GENERIC_WRITE|GENERIC_READ, CREATE_ALWAYS},
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{"w+b", GENERIC_WRITE|GENERIC_READ, CREATE_ALWAYS},
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{"w+b", GENERIC_WRITE|GENERIC_READ, CREATE_ALWAYS},
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{"a+", GENERIC_WRITE|GENERIC_READ, OPEN_ALWAYS },
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{"a+", FILE_GENERIC_APPEND|GENERIC_READ, OPEN_ALWAYS },
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{"ab+", GENERIC_WRITE|GENERIC_READ, OPEN_ALWAYS },
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{"ab+", FILE_GENERIC_APPEND|GENERIC_READ, OPEN_ALWAYS },
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{"a+b", GENERIC_WRITE|GENERIC_READ, OPEN_ALWAYS }
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{"a+b", FILE_GENERIC_APPEND|GENERIC_READ, OPEN_ALWAYS }
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};
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};
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static OpenFlags *find_open_flag(const char *mode_str)
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static OpenFlags *find_open_flag(const char *mode_str)
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