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storage: Add comment to picking return value of qemu-img

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Commit d7b2679253504d6defa9fc7159b572cfd6a25a95 introduced
a return value picking of qemu-img on '-h', but without any comment.
This commit is contained in:
Michal Privoznik 2011-05-24 08:54:37 +02:00
parent bb1c5423b9
commit 5f88d198bd
1 changed files with 3 additions and 0 deletions
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src/storage/storage_backend.c
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@ -628,6 +628,9 @@ static int virStorageBackendQEMUImgBackingFormat(const char *qemuimg)
virCommandSetOutputBuffer(cmd, &help); virCommandSetOutputBuffer(cmd, &help);
virCommandClearCaps(cmd); virCommandClearCaps(cmd);
/* qemuimg doesn't return zero exit status on -h,
* therefore we need to provide pointer for storing
* exit status, although we don't parse it any later */
if (virCommandRun(cmd, &exitstatus) < 0) if (virCommandRun(cmd, &exitstatus) < 0)
goto cleanup; goto cleanup;