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refs: print errno for read_raw_ref if GIT_TRACE_REFS is set
The ref backend API uses errno as a sideband error channel. Signed-off-by: Han-Wen Nienhuys <hanwen@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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@ -244,6 +244,7 @@ static int debug_read_raw_ref(struct ref_store *ref_store, const char *refname,
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int res = 0;
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oidcpy(oid, &null_oid);
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errno = 0;
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res = drefs->refs->be->read_raw_ref(drefs->refs, refname, oid, referent,
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type);
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@ -251,7 +252,9 @@ static int debug_read_raw_ref(struct ref_store *ref_store, const char *refname,
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trace_printf_key(&trace_refs, "read_raw_ref: %s: %s (=> %s) type %x: %d\n",
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refname, oid_to_hex(oid), referent->buf, *type, res);
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} else {
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trace_printf_key(&trace_refs, "read_raw_ref: %s: %d\n", refname, res);
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trace_printf_key(&trace_refs,
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"read_raw_ref: %s: %d (errno %d)\n", refname,
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res, errno);
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}
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return res;
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}
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