Fixes#21. The problem was caused when the double-fork logic used in "servald
start" was clobbered in 5103176. This meant that the servald daemon process on
Android no longer had a PPID=1, but the PID of the long-lived
"org.servalproject" parent process which called the JNI entry point. Killing
the servald process then caused it to become a zombie process, since the
org.servalproject does not habitually call wait(2). That caused the "servald
stop" logic to send five SIGHUPs to the zombie without any error, making it
appear that the process was not dying.
Reinstated the double-fork logic and added a new test case to ensure that the
daemon process does not become a zombie on being killed prematurely.
Must be enabled by using rhizome.api.addfile.*
Certainly polishing to be done, including using filename supplied
during HTTP POST. Now to fix that, and make it all work with
final rhizomeprotocol test case.
rhizomeprotocol test cases 8 and 9 currently fail post-merge. #9
All test cases pass on Solaris (see issue #16) except the 'jni' tests because
there is no Java compiler available on Solaris, and the new 'rhizomeprotocol'
tests from the rhizomedirect branch, which have always failed.
serval_packetvisualise() is now replaced by DEBUG_packet_visualise() which uses
logging system not stderr (so now it will appear in Android log).
Replaced several fprintf(stderr,...) with DEBUGF(...).
Command line only prints a full help message on "help" command -- a command
parse failure simply informs the user about the "help" command.
Servald starts DNA helper, receives startup ACK, sends requests, receives
responses, handles malformed helper responses, echoes dnahelper stderr lines to
log, sends MDP reply packet, waits for dead helper process, all asynchronously.
Shuts down helper process during servald shutdown.
Remaining issues:
- Does not impose a timeout on helper responses.
- Only the first URI is reported by the "dna lookup" command.
Do not add 'filehash' var to manifest if filesize=0
Do not accept 'filehash' var when parsing manifest with filesize=0
When responding to a new rhizome advertisement, do not try to HTTP
request a payload if filesize=0, just import the manifest directly
Various operations, eg "rhizome file add", do not report 'filehash'
fields where 'filesize' is zero
Do not delete rows from MANIFESTS table which have empty filehash
Various related bug fixes
