Commit Graph

31 Commits

Author SHA1 Message Date
Giacomo Tesio 0adf1b0431 new build: get rid of Go with few rc scripts. 2021-12-30 00:55:06 +01:00
Giacomo Tesio 4067cb45cb libc: refactoring 2020-09-17 23:47:39 +02:00
Giacomo Tesio 001069aa7b libposix: deep refactor; add sys/posixly command
With these changes, libposix (and newlib) can run MirBSD Korn Shell.
2017-12-18 23:02:36 +01:00
Giacomo Tesio 90c3415176 kernel: fix _procfdprint to use chan's flags 2017-10-25 01:17:31 +02:00
Giacomo Tesio 320e6e6f35 kern: clone $pid's namespace writing #p/$pid/ns
Any process X can get a new copy of the namespace of a target
process Y by writing the string "clone" to the ns file of Y.

The same user must own both processes.
The process writing the ns file must be allowed to mount.

The Pgrp of the calling process is then replaced with a new copy of
the Pgrp of the target process.

After the operation, any change done by X to its own namespace does
not affect Y. Also, if mount was forbidden for Y, it will also be
forbidden for X after the clone.
2017-10-24 23:28:14 +02:00
Giacomo Tesio 9202b04504 rc: use some uppercase variables (PATH, USER...) 2017-10-22 13:22:37 +02:00
Giacomo Tesio d6d65887b2 libc: rename $apid to $APID 2017-10-20 02:05:13 +02:00
Giacomo Tesio d796c73e89 qa: fix broken.runner 2017-08-15 00:53:04 +02:00
Giacomo Tesio 93dfad6b0b kernel: print proc info on addbroken 2017-08-12 23:32:35 +02:00
Giacomo Tesio 1c4a04cd30 qa: various fix to tests 2017-08-11 03:18:32 +02:00
Giacomo Tesio 2a38ee6ab6 qa: fix typo in test 2017-06-06 19:53:45 +02:00
Giacomo Tesio 4f97f4a80b qa: disable broken tests 2017-06-05 22:11:36 +02:00
Giacomo Tesio 9f4472c3bb kernel: simplified fork_chain test 2017-06-05 19:25:08 +02:00
Giacomo Tesio 2269a4bbd0 kernel: minimal test that panic the mmu code 2017-06-03 23:23:42 +02:00
Giacomo Tesio a64a7b0d0e qa: check that notes cannot eat wait messages 2017-05-30 01:00:03 +02:00
Giacomo Tesio fa15f817c4 qa: avoid cast that preclude strict aliasing 2017-05-19 01:09:51 +02:00
Giacomo Tesio 960e8a0d4e qa/kern: more tests for awake 2017-05-17 00:52:16 +02:00
Giacomo Tesio f9b2e9aba4 kernel: generalize awake
Awake can now interrupt several blocking syscalls (even
during note handling).

Among others, it can interrupt await, pread and pwrite.

It cannot interrupt several others for different reasons:

- awake cannot be interrupted by awake;
- syscalls like remove and create can be used for kernel comunication
  and it would be hard to know if the effect occurred in the
  receiving fs if they were interrupted;
- other syscalls do not need awake since they just provide access
  to kernel infos (eg seek or fd2path)

NOTE: awakes registered before a note cannot occur during the note
handling and will be deferred till the next call to noted.
2017-05-15 00:05:59 +02:00
Giacomo Tesio 1263399c0b qa: check devproc start/stop ctl msg 2017-05-07 19:32:55 +02:00
Giacomo Tesio ecd6dddf86 qa/kern: ensure awake in signal handlers is not affected by sleep 2017-05-04 19:55:55 +02:00
Giacomo Tesio 0b193807b6 qa: ensure awake works correctly in signal handlers
Jehanne's notes (like Plan9 ones) are not reentrant.
Thus an alarm can not be used to interrupt a syscall in a note handler.

Awake instead works properly also in a note handler.
2017-05-04 01:07:32 +02:00
Giacomo Tesio 3b35743a64 qa: nested_note checks that notes are enqueued in kernel 2017-05-03 02:23:26 +02:00
Giacomo Tesio e70feee4a3 libc: introduce "jehanne_" namespace
With this commit all functions declared in libc.h have been renamed
with the "jehanne_" prefix. This is done for several reason:

- it removes conflicts during symbol resolution when linking
  standard C libraries like newlib or musl
- it allows programs depending on a standard C library to directly
  link to a library depending on our non standard libc (eg libsec).

To ease transiction two files are provided:

- sys/include/lib9.h that can be included instead of <libc.h> to use
  the old names (via a simple set of macros)
- sys/src/lib/c/lib9.c that can be compiled with a program where the
  macro provided by lib9.h are too dumb (see for example rc or grep).

In the kernel port/lib.h has been modified accordingly and some of
the functions it directly provides has been renamed too (eg malloc
in qmalloc.c and print in devcons.c).
2017-04-19 23:48:21 +02:00
Giacomo Tesio 51d12f1f34 kernel: fix #0/brk/ qid (it's a special directory, not a special file) 2017-01-09 00:44:01 +01:00
Giacomo Tesio 01562d4ddb qa: rfork(RFNAMEG) on tests that are going to rfork(RFNOMNT) later 2017-01-06 23:04:04 +01:00
Giacomo Tesio 882e33b091 qa: fix warnings 2017-01-06 00:54:42 +01:00
Giacomo Tesio 37541724d0 kernel: add #0/brk and move brk_() to libc 2016-12-31 00:43:02 +01:00
Giacomo Tesio 99855d60d6 kernel: move chdir to libc using devself/devproc
Added wdir to devself and devproc:

- read '#0/wdir' to get the working directory of the calling process
  NOTE that a read(fd, nil, -1) will return the negated length
  of the working directory, just in case you want to
  allocate the memory required

- read '/proc/n/wdir' to know the working directory of process n
  (read(fd, nil, -1) still returns the negated length)

- write '#0/wdir' to change the working directory of the calling process
  NOTE: no offset is allowed and the provided string must
  be null terminated

- write '/proc/n/wdir' to change the working directory of process n
  NOTE: no offset is allowed and the provided string must
  be null terminated; moreover if another process change the working
  directory change during the write, the current process will
  receive an error.

In libc updated getwd() and chdir().
Also modified pwd to get advantage of the new file.

To test, run /arch/amd64/qa/kern/wdir.rc or simply try

	% pwd
	/usr/glenda
	% echo -n /tmp > /proc/$pid/wdir
        % pwd
        /tmp
        % cat '#0/wdir' && echo
        /tmp

The expected use cases for wdir in devproc are rio and acme.

Also, note that we could theoretically remove the cd builtin
from rc and simply implement it as a rc function.
We don't do that to preserve rc portability to other OS.
2016-12-15 22:42:01 +01:00
Giacomo Tesio c6de6b66e9 kernel: introduce devself
Devself provides to each process access to its own structures.

So far it contains four files:

- pid
- ppid
- pipes	used to implement pipe(2)
- segments used to implement segattach, segdetach and segfree
2016-12-11 01:26:08 +01:00
Giacomo Tesio f52a185030 decouple Jehanne from 9P2000 (as much as needed)
Jehanne is going to use a new file protocol, but Plan 9 is really
coupled with 9P2000.

Renamed fcall.h as 9P2000.h and introduced specific constants such
as NP_OREAD, NP_OWRITE and so on, so that we can use different values
in the kernel and new protocol.

Renamed devmnt to devninep, since it's actually a device serving 9P2000
file systems.

Also, fixed 9P2000 support in Jehanne, that was broken with the introduction
of OSTAT.
2016-12-06 23:01:45 +01:00
Giacomo Tesio 38aca7a581 first usable version of kernel and commands
After an year of hard work, this is a first "usable" version of Jehanne.
2016-11-26 03:49:29 +01:00