Two years ago I suggested that net-snmp doesn't need to do -lrpm:
http://www.usenet-forums.com/snmp-coders/286442-re-unsnarling- rpmdb-hr-mib.html
in order to populate the HR MIB.Since there was little interest from net-snmp at the time (note "Ugh!" comments),
I dinna bother to pursue sending the patch.Since then, rpm-5.0 has been released, and is now "masked" in Gentoo because
net-snmp doesn't link with -lrpm. So its time for me to attempt to fix the problem in net-snmp for Gentoo.(aside) Note also that rpm-4.6 from @rpm.org is being released, which, unlike rpm-5.x, has a -D_RPM_4_4_COMPAT flag for the *transition* to Yet Another Incompatible API.
Caveat emptor, note "transition" ...Hence I believe its finally time to _REALLY_ solve the development issue of net-snmp <-> rpm
linkage forever.There is no reason that I know of that the HR MIB *must* link -lrpm (and Berkeley DB and ...),
the HR MIB can be populated in other ways.In fact, all non-rpm based systems *already* populate the HR MIB without linking in Berkeley DB.
What is present in rpm-4.4.6 and later is the ability to pass all the information needed to populate the HR MIB using 0b files in a directory. The name of the file carries the necessary name-version-release.arch information, and the timestamp on the file carries the installtime.
The 0b files are maintained synchronously with rpmdb entries in rpm-4.4.6 and later, so one will get the same answer whether you walk the directory, or query an rpmdb.
The mechanism of reading 0b files from a directory is currently in use with PLD linux
net-snmp and is known to work.A very simple script, possibly run by cron, or triggered by an event timer, can be run for *all* version of rpm, not just rpm-4.4.6 which maintains the files internally.
The script used by PLD is attached.Which means that the code in net-snmp becomes extremely simple, basically just walking files in a directory, and running stat to get the install time. This code is *already* present in net-snmp, and a extremely minor change is necessary to
specify which directory path to walk.I assure you that opendir(3) and stat(2) are much easier coding than Berkeley DB and
forked RPM API's. But YMMV as always ...So what sort of patch do you wish? I suggest ripping -lrpm entirely as described above.
Alternatively, I can/will send along the necessary AutoFu in order to teach net-snmp
to recognize and link against RPM 5.0, and delver the same to Gentoo. 73 de Jeff
hrmib-cache
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