rpm -qf questions

[Tan]

hello all,

firstly, i have a particular need to quickly query for package info given a
batch of files so, i've tried the following:

rpm -qf `cat files.list` --nodigest --nosignature

where files.list contains approximately 650 files. this query took 1s on my
machine to complete while repeatedly invoking the same query for each
filename took 1 min.  however, rpm man page doesn't mention the -f (--file)
option can take a list of files so i'm quite hesitant to use this in my
script. can i reliably depend on this behavior?

secondly, i'd like to have the package name and the filename used in the
query to be printed in the format <package-name>:<filename>, so i've added a
--qf '%{NAME}:%{FILENAMES}\n' to the query. this does what i want but it
seems like a strange thing to do as FILENAMES is a list and should be
enclosed in the [ ] brackets.  i've read the doc and my usage should output
something similarly to <package-name>: (array)  instead.  how can i print
out the package name and filename properly?  thanks alot.

cheers,

tan
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