317 lines
11 KiB
Text
317 lines
11 KiB
Text
- define how it should work (doc/braindums/big-picture.text)
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- define service status in one document, so repeatition stops!
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--------------------------------------------------------------------------------
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- rename headers/ -> includes/
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- remove client/ from top level
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--------------------------------------------------------------------------------
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- write about shell scripts in system startup
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- write about general behaviour (covering the death)
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--------------------------------------------------------------------------------
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Generate automatic asciidoc from conf/*
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--------------------------------------------------------------------------------
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Add handler for ctrl+alt+delete
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* document in paths
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--------------------------------------------------------------------------------
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pre-compile config: conf/*
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--------------------------------------------------------------------------------
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panic:
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read configuratio from defaults/panic*
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-> write execute_something before!
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--------------------------------------------------------------------------------
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comm:
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tmpnow: search for pid in list,
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save the pid in the list, so we know whether our executer died!
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--------------------------------------------------------------------------------
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Logging / cinit:
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fuer unsere eigenen ausgaben auch multilog?
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Logger: shared memory?
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--------------------------------------------------------------------------------
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Implement full starting logic in server?
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--------------------------------------------------------------------------------
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Build full dependency tree at start? And begin from the end?
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--------------------------------------------------------------------------------
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comm/*:
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int read
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int write
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--> fuer pipes
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run_init_svc
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muss alle services wissen, die gestartet werden
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start_services_with_deps
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gibt pointer auf struktur zurueck
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-> Anzahl Services (array!)
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-> Service:
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Name (Pfad)
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Ergebniss
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-> beim fehler, die nachricht, strerror?
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http://www.opengroup.org/onlinepubs/009695399/functions/strerror.html
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Beim starten werden needs und wants als needs behandelt, weil
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jeder starter _alle_ services zurueckgeben muss.
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Ein Prozess kann maximal 512 abhaengigkeiten haben.
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-> open files
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Neues cinit:
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Wenn service fehlschlaegt, wird eine Struktur zurueckgegeben.
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Diese enhaelt:
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int success =
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enum { SVC_SUCCESS, SVC_FAILED, SVC_NEED_FAILED, ... }
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char *reason;
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Ausgaben nach Beendigung vom Starten des Services.
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[ on ] %s + Ergebnis
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[ off ] %s
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Rekursives herunter/rauffahren
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--------------------------------------------------------------------------------
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- add error handling to cinit.install.binary
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- remove sigio(), create new functions:
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- one for cleaning up the socket
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- one for doing the communication (specify two fd's)
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- put some logic around exec_svc:
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o put waiting code herein -> waiting code to structure!
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- cleanup serv/sig_reboot.c:7:
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o implement os-specific reboot function
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--------------------------------------------------------------------------------
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1. Entfernung mount
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2. kommunikation ueber
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1. einen fork pro service
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fork(fork)
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3. Socket wird erst nach einem Signal erstellt
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-> Konfiguration sollte SIGWHATEVER senden
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4. Vielleicht panicen, wenn init fehlschlaegt?
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--------------------------------------------------------------------------------
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Als naechstes:
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- add code do implement stopping / restarting with dependency tree
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o add used_by to the list of services
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o used_by should be a simple (double?) linked list
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--------------------------------------------------------------------------------
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Documentation:
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- Installing cinit
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o compiling cinit from source
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o debian / gentoo
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- Configuring
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--------------------------------------------------------------------------------
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Add "used" by to each service, so we can track which services to shutdown.
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--------------------------------------------------------------------------------
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- perhaps use dnotify?
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- recheck warm reboot
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- fix cservice
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- print service name or cinit: before _everything_ WE print
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TESTING:
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- does cinit eat zombies?
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- is the reporting ok?
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- does cservice and ccontrol what's expected?
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# cinit.create.empty.service: can only be started from the bin directory
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- compile cinit static and other tools dynamically per default
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- Fix Switching services off !!
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- Remove RUN_RUN_SVCs, move code to run_svc so one can determine which
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services failed?
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--> sequentieller ablauf!
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--> parallel ablauf, struct-array mit namen und ergebnis?
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--> for dep in deps/*; do fork(run_svc() ); done
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-----> while(any_is_running) { sleep }
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-------> array durchsuchen, ergebnis nutzen.
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- ueberpruefen von wo aus run_svc() aufgerufen wird
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- Fix SIGCHILD problem:
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- exec_svc wants to waitpid() itself, so SIG_CHILD makes problems
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- respawn_svc: does that need to act on SIGCHLD if the master process
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is still running?
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- kill respawn -> sigchild cleans up, we do not get waitpid perhaps?
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- remove umount code?
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- remove zombies, but keep away from SIGCHILD problems
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- remove mount /etc/cinit/tmp code
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-> how to replace?
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- fix bug in Makefile: linking happens twice
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- do not kill respawing service, if off exists
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- ccontrol
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- manpages
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- Error codes when shutting down a service?
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- Delay dokumentieren
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- no_kill dokumentieren
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- ddoc zuendefuehren
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- remove umount, swapoff?
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--> to services?
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- on.out, on.err, on.in?
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-> reading/writing from/to files
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--> Wenn kein ReSPAWN und der Prozess beendet sich nicht,
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dann haengt init!
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- implement "no_kill" until cinit-0.2 or 0.3?
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Doku!!!
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--------------------------------------------------------------------------------
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- Source Logic issues
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- remove FIXME entries (and what should be fixed, too)
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- memset for timespecs?
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- move umount, swapoff and remount to off of init?
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-> cleanup sig_reboot.c
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- run_svc:
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o we have many strcat()s, perhaps save length of pathbuf and strncat at
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pathtmp[strlen(pathbuf)] ?
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- do we really need swapoff?
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--------------------------------------------------------------------------------
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- Documentation
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- Write manpages (use doc/* as base for that)
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- Check Spell and Grammar in documentation
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- write howto:
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o Howto-cinit
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o Howto-cinit-uml
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--------------------------------------------------------------------------------
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Things I did not do and I don't know whether we have to care about:
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- Porting
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- add porting code to other unices?
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- like openssh guys do?
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- close(*>2) before forking / executing
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-> close fds, clean environment, etc., ...
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-> do we really need that?
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- logging service!
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-> write output $somewhere, wait for syslog?
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-> flush at the end of start-process?
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-> perhaps pipe logging output to a program?
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--------------------------------------------------------------------------------
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[OLD BUGS]
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- remove cinit watcher?
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-> sig_child -> cycle through list?
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- DOKU: what happens when a service does not terminate....
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und er als once drin ist
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- MANPAGE!
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- execve() fails -> no sleep!!
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- multiple zombies sometimes - problemservices
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-> zombies of respawn watchers are not caught!
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-> sig_chld also therein
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-> problematic due to wait for child
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-doubled cinit instance
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- nur einmal
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- free() everything before starting child
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- cservice!
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- prozess nur einmal -> WARTET! cinit auch!
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doku:
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cservice einmal starten -> wartet auf ende
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cint ersetzt init bei gentoo
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an error occuerd-> verbose
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multuicall probleme -> busysbox --> GIBT ES NICHT!!
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---> DOKU DAZU! mit links, doppelt links, aus test
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---> erklaeren, dass es unproblematisch ist!
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11:09 < folken23> telmich: zsb. eine grund angabe warum ein dienst nicht gestartet
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werden konnte.
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11:09 < folken23> telmich: e.g. file nicht gefunden, service hat nicht 0
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zurueckgeworfen.
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11:09 < folken23> telmich: oder service allready started.
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--------------------------------------------------------------------------------
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possible BUGS:
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[14:44] freelsd:cinit-0.2.2% ./sbin/cservice -e ein
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ein: No such file or directory
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Bad address
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: Service does not exist
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cinit-0.2.2:
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USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
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root 1 96.7 0.0 1580 336 ? R 18:59 5:49 /sbin/cinit
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root 2 0.0 0.0 0 0 ? SN 18:59 0:00 [ksoftirqd/0]
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root 3 0.0 0.0 0 0 ? S 18:59 0:00 [watchdog/0]
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root 4 0.0 0.0 0 0 ? S< 18:59 0:00 [events/0]
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root 5 0.0 0.0 0 0 ? S< 18:59 0:00 [khelper]
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root 6 0.0 0.0 0 0 ? S< 18:59 0:00 [kthread]
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root 10 0.0 0.0 0 0 ? S< 18:59 0:00 \_ [khubd]
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root 12 0.0 0.0 0 0 ? S< 18:59 0:00 \_ [kblockd/0]
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root 99 0.0 0.0 0 0 ? S 18:59 0:00 \_ [pdflush]
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root 100 0.0 0.0 0 0 ? S 18:59 0:00 \_ [pdflush]
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root 102 0.0 0.0 0 0 ? S< 18:59 0:00 \_ [aio/0]
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root 727 0.0 0.0 0 0 ? S< 18:59 0:00 \_ [kseriod]
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root 101 0.0 0.0 0 0 ? S 18:59 0:00 [kswapd0]
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root 800 0.0 0.0 0 0 ? S 18:59 0:00 [khpsbpkt]
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root 803 0.0 0.0 0 0 ? S 18:59 0:00 [pccardd]
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root 838 0.0 0.0 0 0 ? S 18:59 0:00 [kjournald]
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root 1923 0.0 0.0 1584 200 ? S 18:59 0:00 /sbin/cinit
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root 1924 0.0 0.3 3624 1936 tty2 Rs 18:59 0:00 \_ -zsh
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root 1969 0.0 0.0 1580 320 tty2 S 19:05 0:00 \_ cservice -e 3
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root 1972 0.0 0.1 2604 828 tty2 R+ 19:05 0:00 \_ ps axuwwf
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root 1945 0.0 0.0 0 0 tty2 Z 19:01 0:00 [loadkeys] <defunct>
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cinit: [cprofile:profile]
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cinit should not be started directly, but by your kernel.
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umount raus
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/etc/cinit/specials/... rein
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1. Doku auf asciidoc umstellen
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2. den signalhandler code fixen
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3. den tempmount entfernen
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--> cinit-0.3-rc1
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--------------------------------------------------------------------------------
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Helper scripts, rausgenommen aus Der Doku, muessen fuer
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cinit-0.3 ueberprueft werden:
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Configure help scripts
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~~~~~~~~~~~~~~~~~~~~~~
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cinit-conf later
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Using prepared scripts
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In the bin/ directory of this tarball you'll find at least:
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cinit.add.dependency - add a dependency to a service
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cinit.add.getty - add a new getty
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cinit.create.empty.service - create an empty service
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cinit.reboot - reboot in /bin/sh
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cinit.remove.getty - remove a getty service
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cinit.respawn.off - switch respawing off
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cinit.respawn.on - switch respawing on
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cinit.shutdown - shutdown in /bin/sh
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--------------------------------------------------------------------------------
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--------------------------------------------------------------------------------
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Optimisations
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-------------
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tree_exec
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~~~~~~~~~
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- only check dependencies (=needs) after the basic run?
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Documentation
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-------------
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developer
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~~~~~~~~~
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- ST_IN_LIST == startup marker, used to (NOT) insert services into startup
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- dep_needs_wants_add is used to add dependencies of a service to the general
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starter list
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user
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----
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- dependencies with leading '.' (dot) are ignored.
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- about cinit-configuration structure
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* cconfig
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* svc/
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* special/ (or however we called it)
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- panic
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- halt
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- poweroff
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- reboot
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