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net: truncate output file when using dump backend 

This prevents data of a previous run to be seen in the new dump file.

Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Hervé Poussineau 2011-11-30 21:35:37 +01:00 committed by Anthony Liguori
parent bc7c9eccfe
commit 6514ed528c
1 changed files with 1 additions and 1 deletions
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2
net/dump.c
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@ -106,7 +106,7 @@ static int net_dump_init(VLANState *vlan, const char *device,
DumpState *s;
int fd;
fd = open(filename, O_CREAT | O_WRONLY | O_BINARY, 0644);
fd = open(filename, O_CREAT | O_TRUNC | O_WRONLY | O_BINARY, 0644);
if (fd < 0) {
error_report("-net dump: can't open %s", filename);
return -1;