David Herrmann
7cd4dbe9ca
Lets look at an example where we add arg0="/foo/bar/waldo" to a bloom-filter. The following strings are added: "arg0:/foo/bar/waldo" "arg0-slash-prefix:/foo/bar" "arg0-slash-prefix:/foo" Two problems arise: 1) If we match on "arg0path=/foo/bar/waldo", the dbus-spec explicitly states that equal strings are also considered prefixes. However, in the bloom-match, we can only provide a single match-filter. Therefore, we have to add "arg0-slash-prefix:/foo/bar/waldo" there, but this never occured in the bloom-mask of the message. Hence, this patch makes sure bloom_add_prefixes() adds the full path as prefix, too. 2) If we match on "arg0path=/foo/", the dbus-spec states that arg0path does prefix-matching with the trailing slash _included_, unlike path_namespace= matches, which does *not* include them. This is inconsistent, but we have to support the specs. Therefore, we must add prefixes with _and_ without trailing separators. Hence, this patch makes sure bloom_add_prefixes() adds all prefixes with the trailing slash included. The final set of strings added therefore is: "arg0:/foo/bar/waldo" "arg0-slash-prefix:/foo/bar/waldo" "arg0-slash-prefix:/foo/bar/" "arg0-slash-prefix:/foo/bar" "arg0-slash-prefix:/foo/" "arg0-slash-prefix:/foo" "arg0-slash-prefix:/"
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