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qemu-img: Allow creating zero sized images 

A size of 0 should be valid and cannot be treated as "missing value". Use -1
for this purpose instead.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Kevin Wolf 2009-10-28 11:36:07 +01:00 committed by Anthony Liguori
parent 5819c91806
commit 9f56640c85
1 changed files with 6 additions and 3 deletions
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9
qemu-img.c
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@ -297,13 +297,16 @@ static int img_create(int argc, char **argv)
return 0;
}
/* Create parameter list with default values */
param = parse_option_parameters("", drv->create_options, param);
set_option_parameter_int(param, BLOCK_OPT_SIZE, -1);
/* Parse -o options */
if (options) {
param = parse_option_parameters(options, drv->create_options, param);
if (param == NULL) {
error("Invalid options for file format '%s'.", fmt);
}
} else {
param = parse_option_parameters("", drv->create_options, param);
}
/* Get the filename */
@ -321,7 +324,7 @@ static int img_create(int argc, char **argv)
// The size for the image must always be specified, with one exception:
// If we are using a backing file, we can obtain the size from there
if (get_option_parameter(param, BLOCK_OPT_SIZE)->value.n == 0) {
if (get_option_parameter(param, BLOCK_OPT_SIZE)->value.n == -1) {
QEMUOptionParameter *backing_file =
get_option_parameter(param, BLOCK_OPT_BACKING_FILE);