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storage: Check stderr when matching parted output

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In old version of parted like parted-2.1-25, error message is shown in
stdout when printing a disk info without disk label.

    Error: /dev/sda: unrecognised disk label

This line has been moved to stderr in newer version of parted. So we
should check both stdout and stderr when locating this message.

This should fix bug:
    https://bugzilla.redhat.com/show_bug.cgi?id=1172468

Signed-off-by: Hao Liu <hliu@redhat.com>
This commit is contained in:
Hao Liu 2014-12-10 15:14:26 +08:00 committed by Michal Privoznik
parent 57023c0a3a
commit 9788007892
1 changed files with 6 additions and 1 deletions
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7
src/storage/storage_backend_disk.c
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@ -370,21 +370,26 @@ virStorageBackendDiskFindLabel(const char* device)
}; };
virCommandPtr cmd = virCommandNew(PARTED); virCommandPtr cmd = virCommandNew(PARTED);
char *output = NULL; char *output = NULL;
char *error = NULL;
int ret = -1; int ret = -1;
virCommandAddArgSet(cmd, args); virCommandAddArgSet(cmd, args);
virCommandAddEnvString(cmd, "LC_ALL=C"); virCommandAddEnvString(cmd, "LC_ALL=C");
virCommandSetOutputBuffer(cmd, &output); virCommandSetOutputBuffer(cmd, &output);
virCommandSetErrorBuffer(cmd, &error);
/* if parted succeeds we have a valid partition table */ /* if parted succeeds we have a valid partition table */
ret = virCommandRun(cmd, NULL); ret = virCommandRun(cmd, NULL);
if (ret < 0) { if (ret < 0) {
if (strstr(output, "unrecognised disk label")) if (strstr(output, "unrecognised disk label") ||
strstr(error, "unrecognised disk label")) {
ret = 1; ret = 1;
} }
}
virCommandFree(cmd); virCommandFree(cmd);
VIR_FREE(output); VIR_FREE(output);
VIR_FREE(error);
return ret; return ret;
} }