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do not check odb_mkstemp return value for errors

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The odb_mkstemp function does not return an error; it dies
on failure instead. But many of its callers compare the
resulting descriptor against -1 and die themselves.

Mostly this is just pointless, but it does raise a question
when looking at the callers: if they show the results of the
"template" buffer after a failure, what's in it? The answer
is: it doesn't matter, because it cannot happen.

So let's make that clear by removing the bogus error checks.
In bitmap_writer_finish(), we can drop the error-handling
code entirely. In the other two cases, it's shared with the
open() in another code path; we can just move the
error-check next to that open() call.

And while we're at it, let's flesh out the function's
docstring a bit to make the error behavior clear.

Signed-off-by: Jeff King <peff@peff.net>
This commit is contained in:
Jeff King
2017-03-28 15:45:25 -04:00
committed by Junio C Hamano
parent e1104a5ee5
commit 892e723afd
4 changed files with 10 additions and 8 deletions
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7
builtin/index-pack.c
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@ -311,10 +311,11 @@ static const char *open_pack_file(const char *pack_name)
output_fd = odb_mkstemp(tmp_file, sizeof(tmp_file),
"pack/tmp_pack_XXXXXX");
pack_name = xstrdup(tmp_file);
} else
} else {
output_fd = open(pack_name, O_CREAT|O_EXCL|O_RDWR, 0600);
if (output_fd < 0)
die_errno(_("unable to create '%s'"), pack_name);
if (output_fd < 0)
die_errno(_("unable to create '%s'"), pack_name);
}
nothread_data.pack_fd = output_fd;
} else {
input_fd = open(pack_name, O_RDONLY);