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block/raw-posix: Strip protocol prefix on creation

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The hdev_create() implementation in block/raw-posix.c is used by the
"host_device", "host_cdrom" and "host_floppy" protocol block drivers
together. Thus, any of the associated prefixes may occur and exactly one
should should be stripped, if it does (thus,
"host_device:host_cdrom:/dev/cdrom" is not shortened to "/dev/cdrom").

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Benoit Canet <benoit@irqsave.net>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Max Reitz 2014-03-08 00:39:44 +01:00 committed by Stefan Hajnoczi
parent 18fa1c42a3
commit cc28c6aa46
1 changed files with 12 additions and 0 deletions
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12
block/raw-posix.c
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@ -1776,6 +1776,18 @@ static int hdev_create(const char *filename, QEMUOptionParameter *options,
int ret = 0;
struct stat stat_buf;
int64_t total_size = 0;
bool has_prefix;
/* This function is used by all three protocol block drivers and therefore
* any of these three prefixes may be given.
* The return value has to be stored somewhere, otherwise this is an error
* due to -Werror=unused-value. */
has_prefix =
strstart(filename, "host_device:", &filename) ||
strstart(filename, "host_cdrom:" , &filename) ||
strstart(filename, "host_floppy:", &filename);
(void)has_prefix;
/* Read out options */
while (options && options->name) {