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dtc: Check return value from fwrite()

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There's one place in flattree.c where we currently ignore the return
value from fwrite().  On some gcc/glibc versions, where fwrite() is
declared with attribute warn_unused_result, this causes a warning.

This patch fixes the warning, by checking the fwrite() result.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
David Gibson 2008-11-07 11:41:11 +11:00 • committed by Jon Loeliger
parent f99cd158a9
commit 0783d7e705
1 changed files with 7 additions and 4 deletions
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11
flattree.c
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@ -413,10 +413,13 @@ void dt_to_blob(FILE *f, struct boot_info *bi, int version)
if (padlen > 0) if (padlen > 0)
blob = data_append_zeroes(blob, padlen); blob = data_append_zeroes(blob, padlen);
fwrite(blob.val, blob.len, 1, f); if (fwrite(blob.val, blob.len, 1, f) != 1) {
if (ferror(f))
if (ferror(f)) die("Error writing device tree blob: %s\n",
die("Error writing device tree blob: %s\n", strerror(errno)); strerror(errno));
else
die("Short write on device tree blob\n");
}
/* /*
* data_merge() frees the right-hand element so only the blob * data_merge() frees the right-hand element so only the blob