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Better error reporting if the link target is too long
This situation won't set errno, so using %m will give an incorrect error message.
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1f422db663
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@ -287,9 +287,12 @@ pg_tablespace_location(PG_FUNCTION_ARGS)
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*/
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snprintf(sourcepath, sizeof(sourcepath), "pg_tblspc/%u", tablespaceOid);
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rllen =readlink(sourcepath, targetpath, sizeof(targetpath));
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if (rllen < 0 || rllen >= sizeof(targetpath))
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if (rllen < 0)
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ereport(ERROR,
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(errmsg("could not read symbolic link \"%s\": %m", sourcepath)));
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else if (rllen >= sizeof(targetpath))
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ereport(ERROR,
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(errmsg("symbolic link \"%s\" target is too long", sourcepath)));
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targetpath[rllen] = '\0';
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PG_RETURN_TEXT_P(cstring_to_text(targetpath));
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