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before we matched ppc64le as ppc64 (which is big ending I presume), so
the seccomp filter would always kill gmid
#4 related
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Calling `configure' with --disable-sandbox will disable the sandbox
support *completely* at compile time. gmid will still complain at
compile time and during the startup.
Users shouldn't disable the sandbox if possible, but instead report
problem upstream so they get fixed (hopefully.)
#4 related
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* SECCOMP_AUDIT_ARCH extended to support more architectures
* relax fcntl policy: allow the syscall regardless of the flags
* wrap every syscall in a ifdef, and add some (statx, fcntl64, ...)
used in x86
Some bits were taken from dhcpcd[0], thanks!
#4 related
[0]: https://roy.marples.name/git/dhcpcd/blob/HEAD:/src/privsep-linux.c
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the logger process now can receive a file descriptor to write logs
to. At the moment the logic is simple, if it receives a file it logs
there, otherwise it logs to syslog. This will allow to log on custom
log files.
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Not production-ready yet, but it's a start.
This adds a third ``backend'' for gmid: until now there it served
local files or CGI scripts, now FastCGI applications too.
FastCGI is meant to be an improvement over CGI: instead of exec'ing a
script for every request, it allows to open a single connection to an
``application'' and send the requests/receive the responses over that
socket using a simple binary protocol.
At the moment gmid supports three different methods of opening a
fastcgi connection:
- local unix sockets, with: fastcgi "/path/to/sock"
- network sockets, with: fastcgi tcp "host" [port]
port defaults to 9000 and can be either a string or a number
- subprocess, with: fastcgi spawn "/path/to/program"
the fastcgi protocol is done over the executed program stdin
of these, the last is only for testing and may be removed in the
future.
P.S.: the fastcgi rule is per-location of course :)
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saves some bytes of memory and removes the limit on the maximum number
of vhosts and location blocks.
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it's needed by getdtablesize, at least on glibc
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while there, add capsicum for the logger process
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accept4(2) isn't part of any standard (even though it'll be part in
the future) and raises warnings on some linux distro. Moreover, we
don't have thread that may fork at any time, so doing a mark_nonblock
after isn't a big deal.
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fatal logs to the correct place, err only on stderr.
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these are required to run on arch linux (at least)
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fedora 33 issue an epoll_wait instead of pwait.
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add/remove syscalls from the BPF filter and move sandbox() after
libevent initialisation
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not a big deal, since the pledge prohibits us to exec, but
nevertheless.
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musl does a F_SETFD in its fdopendir
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alpine on amd64 (under OpenBSD vmd) tries to do a clock_gettime. I
don't know why, but it doesn't seem a problem to allow it.
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allow only the F_GETFL and F_SETFL commands
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on the latest fedora we glibc uses poll. On the other linux distro I
tried (void), musl is probably providing poll as a ppoll wrapper.
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this way, we can sandbox the listener with seccomp (todo) or capsicum
(already done) and still have CGI scripts. When we want to exec, we
tell the executor what to do, the executor executes the scripts and
send the fd backt to the listener.
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