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The search service can find package by either name (apache), provides(webserver), absolute file names (/usr/bin/apache), binaries (gprof) or shared libraries (libXm.so.2) in standard path. It does not support multiple arguments yet...
The System and Arch are optional added filters, for example System could be "redhat", "redhat-7.2", "mandrake" or "gnome", Arch could be "i386" or "src", etc. depending on your system.
Proc::SafeExec provides an easy, safe way to execute external programs. It replaces all of Perl's questionable ways of accomodating this, including system(), open() with a pipe, exec(), back-ticks, etc. This module will never automatically invoke /bin/sh. This module is easy enough to use that /bin/sh should be unnecessary, even for complex pipelines. For all errors, this module dies setting $@. Errors from exec() in the child are reported gracefully to the parent. This means that if anything fails in the child, the error is reported through $@ with die just like any other error. This also reports $@ if child_callback dies when it is called between fork() and exec(). This is accomplished by passing $@ through an extra pipe that's closed when exec succeeds. Note: A side-effect of this is $@ is stringified if it isn't a string.
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