FFLAG_NEEDSYNC and fsync the file when select() next returns zero. This
dramatically speeds up the process of logging large amounts of data, while
leaving the essential semantics (that data can be expected to be on disk
if we crash) unchanged.
In my tests, this speeds up the rc phase of booting by 18-20%. [1]
YES PLEASE! by: phk [1]
explicitly fsynced after kernel messages are logged. This option
should be syntax compatible with a similar option in Linux syslogd.
I've made some small changes to Pekka's patch, hoepfully I haven't
goofed anything.
PR: 66790
Submitted by: Pekka Savola <pekkas@netcore.fi>
Obtained from: Martin Schulze's syslogd
MFC after: 1 month
Syslogd should ensure that f_file is a valid file descriptor when
f_type is FILE, CONSOLE, TTY and for a PIPE where f_pid > 0. If the
descriptor is closed/invalid then the type should be set to UNUSED
or the pid should be set to 0.
To this end:
1) Don't close(f->f_file) if we can't send a message to a remote
host because the file descriptor used for remote logging is
stored in finet, not in f->f_file. f->f_file is probably
uninitialised, so I guess we usually end up closing fd 0.
2) Don't close PIPE file descriptors if they are invalid.
3) If the call to p_open fails, don't set the pid.
The OpenBSD patches in this area set f_file to -1 after the fd is
closed and then avoids calling close if f_file < 0. I haven't done
this, but it might be a good idea too.
Inspired by: PR 67139/OpenBSD
1) Use strncpy on strings out of utmp.
2) Avoid running off the start of one string while removing white space.
(I've used slightly different code to OpenBSD here.)
3) Ignore trailing spaces in the priority.
PR: 67139
Submitted by: Xin LI <delphij@FreeBSD.org.cn>
Obtained from: OpenBSD
1) Don't check for getopt returning '?', we have a default case.
2) Check if the priority is LOG_KERN correctly - in practice
LOG_KERN is 0, so it makes no difference. OpenBSD fixed a
different nearby bug that we don't have 'cos our definition
of LOG_MAKEPRI is different to OpenBSD's.
Copy a comment from OpenBSD, observing that LOG_KERN is 0.
Inspired by PR: 67139
if the line doesn't match ^<%d>, then treat it as a regular kernel
printf line. Previously if a kernel printf message started with "<"
it would be interpreted as a log message, often with LOG_EMERG
level. This was triggered by some printfs in sys/dev/aic7xxx/, and
can also happen with the partial lines that result if syslogd cannot
keep up with the rate of arrival of kernel messages.
Reviewed by: dwmalone
MFC after: 1 week
is possible for an error to occur while trying to log an error, and
this can result in infinite recursion (or at least until we run out
of stack).
Rather than this, we ignore requests to log an error while logging an
error.
PR: 51253
MFC after: 2 weeks
1. Hostnames were not treated case insensitively in all cases.
2. The method for stripping hostnames when reading the syslog.conf
differed from that when finding the hostname of an incoming request.
This lead to a broken match check. In my case, it meant I had to
have '@scooter.smi.example.com.example.com' to have 'logger.example.com'
properly save messages from 'scooter.smi.sendmail.com'.
3. Add paranoia to cfline() such that it doesn't try to access memory
outside of the bounds of the f_host string.
4. While I am here, get rid of an outdated comment, argv[{0,1,2}] are now
checked for NULL after the strdup() calls.
Reviewed by: dwmalone
MFC after: 1 week
revision 1.101 (which did not introduce the bug but made it harder to fix)
PR: misc/40363
Submitted by: David Dunham <dwdunham@isilon.com>
MFC after: 2 weeks
that already exists for hosts: being able to specify a section that applies
to every program *except* the one in question.
The normal syntax for program specification is still valid. For the new
capability, one uses:
!-program
Since there is no way to specify a program beginning with a dash in the old
syntax, as it would be interpreted as the case above, the following
alternative syntax to the original capability is provided:
!+program
This shouldn't introduce incompatibilities with any syslogd configuration
in production because -stable's syslogd does not support a dash anywhere in
the program specification.
MFC after: 2 weeks
for it.
While I'm here, add a the ability to say "!level" in a way which
should be compatible with Linux's syslogd.
PR: 28935
No objections: audit
MFC after: 2 weeks
EHOSTDOWN. These are often transient errors (when the remote host
reboots, temporary network problems, etc.), and we'd rather err on the
side of caution and keep trying send messages that never arrive than
just give up.
Note that this is not an implementation of the "back-off" methods
given in the PR. Those just seem too complicated. Why not just keep
trying each time? Trying and failing doesn't really consume
significantly more resources than if we were successful for each
message.
PR: bin/31029
MFC after: 1 week
do not stop copying it into a buffer when encountering a
non-alphanumerical character. Only stop at unprintable characters.
This makes syslogd work correctly with executables like `interp.bin',
`httpd_old', etc.
PR: misc/40941
MFC after: 1 week
