The addition of the nanosleep syscall was correctly added to
libc/sys/Makefile so that it is renamed as _thread_sys_nanosleep().
This syscall is one of those that libc_r has to re-implement because
the only behaviour is to block the process. So libc_r just ignores the
fact that a nanosleep syscall exists and goes its own way - as it has
done all along .... and now it does again. And now a simple program
can sleep again. Phew.
Malloc cannot use pthread_mutex_init() to initialize a mutex because
the mutex initialization process does a malloc!
libc_r internals skip the malloc and assign an initializer to a static
structure and point the opaque type (pthread_mutex_t in this case) to
that structure. This is done on the assumption that the mutex will never
be destroyed. This style of initialization is only valid inside libc_r
because the structure that is assigned is opaque to the user.
This fix allows a simple program to get to main() again. 8-)
semantics of the old sleep for compatability with a few decades of expected
side effects. Apache breaks if we just use nanosleep() for some reason,
here we use a new signanosleep() syscall which is kinda like a hybrid of
sigsuspend and nanosleep..
Reviewed by: ache (and tested on his apache that was failing when
sleep used plain nanosleep)
These changes add the ability to specify that a UFS file/directory
cannot be unlinked. This is basically a scaled back version
of the IMMUTABLE flag. The reason is to allow an administrator
to create a directory hierarchy that a group of users
can arbitrarily add/delete files from, but that the hierarchy
itself is safe from removal by them.
If the NOUNLINK definition is set to 0
then this results in no change to what happens normally.
(and results in identical binary (in the kernel)).
It can be proven that if this bit is never set by the admin,
no new behaviour is introduced..
Several "good idea" comments from reviewers plus one grumble
about creeping featurism.
This code is in production in 2.2 based systems
-DUSE_NANOSLEEP. Also, seperate the code for _THREAD_SAFE so that it uses
the simpler threaded nanosleep() call in libc_r.. We don't go to the same
extremes for emulating traditional sleep semantics (ie: eating any SIGALRM
that might happen) which things like apache seem to depend on.
- bde's change to includes section in getrpcent.3
- Lost comment in svc_run.c (the code here was actually the same since
I had fixed the 'fds + 1' bug in my stuff at home before mailing
Peter about it, but I didn't notce that he'd made a change to the
comment right above the changed line).
Also pointed out by the ever vigilant: bde
This concludes tonight's entertainment. Once I'm sure I haven't destroyed
the world with all these changes, I'll import the utilities. Everything
should continue to work as before. If it doesn't let me know.
Special thanks to Mark Murray for running a test 'make world' for me to
shake out the bugs, which, hopefully, I have fixed.
(And there was much rejoicing.)
Note: you'll need to rinstalkl all your includes before compiling libc
the next time you update your sources in order for all this to work.
Reviewed by: Mark Murray
ppp (or will be shortly). Natd can now be updated to use
this library rather than carrying its own version of the code.
Submitted by: Charles Mott <cmott@srv.net>
visible type names in prototypes in user space headers. libutil.h
generates warnings with -Wall over the use of "const char *ttyname".
It's lucky it wasn't a #define conflict.
Is a single '_' prefix acceptable? or does it need to be two?
value, it appears as though the semantics of usleep are that it doesn't
return early. (only in the nanosleep code - the setitimer code does this
already)
(nanosleep) breaks Apache httpd badly: his childs died quickly after
number of requests (SIGPIPE). To reproduce this bug start
gdb /usr/local/sbin/httpd
run -X
and make some bunch of concurent requests (load the server pages
from 3 different places f.e.)
After short time httpd dies via SIGPIPE. It never dies with old sleep.c
In real life it looks like lots of broken images on the pages or missing
pages. Lynx says about Network read error, etc.
It seems something wrong in nanosleep signal handling.
back as designed in *BSD
Also it not violates current standards but
1) No other Unixes have this feature
2) It broke Kerberos5 (isprint) and God knows what else
(not all vendors will agree to treat FreeBSD as special case for support
since (1))
2) Give false localization sense (programs mimic to be 8859-1
localized) which prevents true localization.
bumped only 0.1 or 1.0 between releases. (See handbook.)
Note that if you have built world in -current in the last 48 hours or
so, you should manually remove /usr/lib/libutil.so.2.3 before
rebuilding world to cleanse your system.
