Commit Graph

1465 Commits

Author SHA1 Message Date
kevlo
0ebb652007 Document that sendfile(2) can fail with ENOBUFS.
Reviewed by:	glebius
2012-11-14 01:45:10 +00:00
kib
39bfcc5eed Document wait6() and waitid().
PR:	standards/170346
Submitted by:	"Jukka A. Ukkonen" <jau@iki.fi>
MFC after:	1 month
2012-11-13 12:56:42 +00:00
kib
37c97ba01b Implement the waitid() SUSv4 function using wait6() system call.
PR:	standards/170346
Submitted by:	"Jukka A. Ukkonen" <jau@iki.fi>
MFC after:	1 month
2012-11-13 12:55:52 +00:00
jilles
4be8d9368b fcntl(2): Fix typos in name of constant "F_DUP2FD_CLOEXEC".
MFC after:	1 week
2012-11-01 09:38:28 +00:00
eadler
7f780401e5 Update the kill(2) and killpg(2) man pages to the modern permission
checks. Also indicate killpg(2) is POSIX compliant.

Reviewed by:	jilles
Reviewed by:	wblock
Approved by:	cperciva
MFC after:	3 days
2012-10-22 03:37:00 +00:00
andre
6062df3e66 Grammar fixes to r241781.
Submitted by:	alc
2012-10-20 19:38:22 +00:00
andre
1211b4598c Hide the unfortunate named sysctl kern.ipc.somaxconn from sysctl -a
output and replace it with a new visible sysctl kern.ipc.acceptqueue
of the same functionality.  It specifies the maximum length of the
accept queue on a listen socket.

The old kern.ipc.somaxconn remains available for reading and writing
for compatibility reasons so that existing programs, scripts and
configurations continue to work.  There no plans to ever remove the
orginal and now hidden kern.ipc.somaxconn.
2012-10-20 12:53:14 +00:00
jilles
e4c096aeb4 sigaction(2),sigwait(2),sigwaitinfo(2): Remove [EFAULT] error condition.
Passing an invalid pointer results in undefined behaviour.

The wrappers in libthr access some of the data pointed to by the arguments
in userland, so that an invalid pointer will cause a signal and not an
[EFAULT] error return.

Furthermore, if the [EFAULT] error occurs when the kernel is writing, it is
not a proper error in the sense that the call still commits (changing the
signal disposition or accepting the signal).

MFC after:	1 week
2012-09-27 17:48:04 +00:00
kevlo
02ad3abcdd Remove the restrict qualifier to match function prototype. 2012-09-20 02:25:18 +00:00
glebius
78d32fb722 Describe in detail required conditions for receiving the SCM_CREDS
control message and suggest to use LOCAL_CREDS setsockopt() for
reliability.
2012-09-12 09:50:17 +00:00
jhb
dfb185f559 When WIFCONTINUED was added, the number of "first" macros grew from
three to four.

MFC after:	1 week
2012-09-05 11:55:53 +00:00
zeising
9e17ee4443 Add missing .Pp macro.
PR:		docs/170380
Submitted by:	Garrett Cooper <yanegomi@gmail.com>
Approved by:	joel (mentor)
2012-08-21 16:35:14 +00:00
davidxu
3f0806aa1f Implement syscall clock_getcpuclockid2, so we can get a clock id
for process, thread or others we want to support.
Use the syscall to implement POSIX API clock_getcpuclock and
pthread_getcpuclockid.

PR:	168417
2012-08-17 02:26:31 +00:00
kib
4e7839007a Document F_DUP2FD_CLOEXEC.
MFC after:	1 week
2012-07-27 10:41:53 +00:00
kib
e04825c920 (Incomplete) fixes for symbols visibility issues and style in fcntl.h.
Append '__' prefix to the tag of struct oflock, and put it under BSD
namespace. Structure is needed both by libc and kernel, thus cannot be
hidden under #ifdef _KERNEL.

Move a set of non-standard F_* and O_* constants into BSD namespace.
SUSv4 explicitely allows implemenation to pollute F_* and O_* names
after fcntl.h is included, but it costs us nothing to adhere
to the specification if exact POSIX compliance level is requested by
user code.

Change some spaces after #define to tabs.

Noted by and discussed with:	     bde
MFC after:   1 week
2012-07-21 13:02:11 +00:00
kib
d950d8a13f Document F_DUPFD_CLOEXEC. Also provide some wording changes for
F_DUPFD to make it less confusing, at least for me.

MFC after:	1 week
2012-07-19 10:23:59 +00:00
lstewart
9ca1308bfb Move the ffclock symbols from FBSD_1.2 to FBSD_1.3 where they should have been
put initially. They were added to head during development of 10-CURRENT, not
9-CURRENT.

Submitted by:	glebius
Reviewed by:	kib
2012-07-10 08:31:28 +00:00
kib
13a9f42818 Use struct vdso_timehands data to implement fast gettimeofday(2) and
clock_gettime(2) functions if supported. The speedup seen in
microbenchmarks is in range 4x-7x depending on the hardware.

Only amd64 and i386 architectures are supported. Libc uses rdtsc and
kernel data to calculate current time, if enabled by kernel.

Hopefully, this code is going to migrate into vdso in some future.

Discussed with:	bde
Reviewed by:	jhb
Tested by:	flo
MFC after:	1 month
2012-06-22 07:13:30 +00:00
jhb
571562fffb Further refine the implementation of POSIX_FADV_NOREUSE.
First, extend the changes in r230782 to better handle the common case
of using NOREUSE with sequential reads.  A NOREUSE file descriptor
will now track the last implicit DONTNEED request it made as a result
of a NOREUSE read.  If a subsequent NOREUSE read is adjacent to the
previous range, it will apply the DONTNEED request to the entire range
of both the previous read and the current read.  The effect is that
each read of a file accessed sequentially will apply the DONTNEED
request to the entire range that has been read.  This allows NOREUSE
to properly handle misaligned reads by flushing each buffer to cache
once it has been completely read.

Second, apply the same changes made to read(2) by r230782 and this
change to writes.  This provides much better performance in the
sequential write case as it allows writes to still be clustered.  It
also provides much better performance for misaligned writes.  It does
mean that NOREUSE will be generally ineffective for non-sequential
writes as the current implementation relies on a future NOREUSE
write's implicit DONTNEED request to flush the dirty buffer from the
current write.

MFC after:	2 weeks
2012-06-19 18:42:24 +00:00
ed
2abbdfc576 Remove invalid remark about pipes.
The stat structures returned on pipes seems to contain all the
information required by POSIX. Especially the wording "and thus to a
pipe" makes little sense, because it seems to imply a certain
relationship between sockets and pipes that simply isn't there.

MFC after:	2 weeks
2012-06-02 10:50:25 +00:00
kib
05218621b4 Clarify the SEEK_HOLE description, it repositions the file pointer.
MFC after:  3 days
2012-05-26 05:25:55 +00:00
joel
63208c819e Remove tab from kernel configuration option. This is consistent with the rest
of our manual pages.
2012-05-12 16:08:05 +00:00
gjb
52487d9a5c General mdoc(7) and typo fixes.
PR:		167713
Submitted by:	Nobuyuki Koganemaru (kogane!jp.freebsd.org)
2012-05-08 18:56:21 +00:00
rwatson
ca34da4765 fix a further typo in the pdfork(2) man page.
Submitted by:	Norman Hardy
MFC after:	3 days
2012-04-30 08:00:52 +00:00
rwatson
1f6437f017 The returned file descriptor from pdfork(2) is via fdp, not pidp.
Submitted by:	Norman Hardy
MFC after:	3 days
2012-04-30 07:32:39 +00:00
eadler
785381bbed pread(2) might fail with EBUSY, so document it
PR:		docs/167201
Submitted by:	Kurt Jaeger <fbsd-ports@opsec.eu>
Approved by:	cperciva
MFC after:	3 days
2012-04-29 22:23:00 +00:00
jamie
c3ff4f9acd A new jail(8) with a configuration file, ultimately to replace the work
currently done by /etc/rc.d/jail.

MFC after:	3 months
2012-04-26 17:36:05 +00:00
delphij
0264d1ea29 - Use quote when tab is used;
- Follow the same macros used in device driver manual pages.
2012-04-22 07:51:49 +00:00
jh
42aaadf5ee Additional manual page updates for r234103.
Submitted by:	bde
2012-04-13 05:40:26 +00:00
eadler
2a42c5c4e9 Return EBADF instead of EMFILE from dup2 when the second argument is
outside the range of valid file descriptors

PR:		kern/164970
Submitted by:	Peter Jeremy <peterjeremy@acm.org>
Reviewed by:	jilles
Approved by:	cperciva
MFC after:	1 week
2012-04-11 14:08:09 +00:00
jh
a1ada6f9c6 - Return EPERM from ufs_setattr() when an user without PRIV_VFS_SYSFLAGS
privilege attempts to toggle SF_SETTABLE flags.
- Use the '^' operator in the SF_SNAPSHOT anti-toggling check.

Flags are now stored to ip->i_flags in one place after all checks.

Submitted by:	bde
2012-04-10 15:59:37 +00:00
joel
e31fbc1ed5 mdoc: Ud takes no argument. 2012-03-29 16:20:20 +00:00
joel
f1a6c7f032 mandoc complains loudly when <TAB>s are misused in columnated lists. Fix
this syntax violation and while I'm here also convert <TAB> to Ta and adjust
quotation marks in order to prevent this problem in the future.
2012-03-29 16:02:40 +00:00
eadler
1ef5fe44d3 Remove trailing whitespace per mdoc lint warning
Disussed with:	gavin
No objection from:	doc
Approved by:	joel
MFC after:	3 days
2012-03-29 05:02:12 +00:00
jimharris
84886cd55f Fix comment to specify correct struct name.
Reviewed by: gjb
Approved by: sbruno
2012-03-28 23:51:06 +00:00
joel
db7581ccf5 Make sure sections are sorted into conventional order. 2012-03-25 16:00:56 +00:00
joel
39c40cce12 Remove superfluous paragraph macro. 2012-03-25 12:13:24 +00:00
bjk
5e33e2150e Remove trailing whitespace.
Approved by:	hrs (mentor)
2012-03-19 05:08:09 +00:00
bjk
9c8c00d33b Expound a bit more about the system maximum number of FIBs,
how it may be set, and current limitations on the value.

Approved by:	hrs (mentor)
PR:		docs/157453
MFC after:	1 week
2012-03-19 04:46:11 +00:00
kib
16846fb575 Do not claim that msync(2) is obsoleted [1].
Document EIO from msync(2).

Inspired by PR:	 docs/165929 [1]
Reviewed by:	 jilles
MFC after:	 2 weeks
2012-03-17 23:55:18 +00:00
ed
070929ac80 Extend the description for ESRCH a bit.
This errno can also be returned if the passed process identifier doesn't
correspond with a process group.

Discussed on:	arch@
MFC after:	1 week
2012-03-15 12:12:39 +00:00
ed
f17537891f Remove impossible error condition from the man page.
On FreeBSD, all processes have a process group, so it is impossible for
kill(2) to fail this way.  POSIX also doesn't mention this error
condition.

Discussed on:	arch@
MFC after:	3 weeks
2012-03-15 11:49:26 +00:00
trasz
755a81d3ca Cross-reference sigqueue(2) and kill(2). 2012-03-10 10:54:52 +00:00
pjd
e3b0ea6c34 Link EV_SET(3) to kqueue(2).
MFC after:	3 days
2012-03-05 20:59:34 +00:00
kib
bb3d17b00a Document SO_PROTOCOL socket option.
Discussed with:	bz
Reviewed by:	glebius
MFC after:	2 weeks
2012-02-26 13:57:24 +00:00
gjb
1ab2433a4c Whitespace cleanup:
o Wrap sentences on to new lines
 o Cleanup trailing whitespace

Found with:	textproc/igor
MFC after:	1 week
X-MFC-With:	r232157
2012-02-25 15:21:43 +00:00
gjb
9761e3fdaf Fix various typos in manual pages.
Submitted by:	amdmi3
PR:		165431
MFC after:	1 week
2012-02-25 14:31:25 +00:00
kib
8a17073eef Document PL_FLAG_CHILD.
MFC after:	3 days
2012-02-18 22:26:32 +00:00
delphij
aadda36c02 Bump .Dd date for previous revision. 2012-02-15 18:34:57 +00:00
davidxu
5485b3317a Add notes about sigev_notify_kevent_flags introduced in revision 230857
which enables thread-friendly polling on same fd for AIO events.

Reviewed by:	delphij
2012-02-15 02:59:17 +00:00
ed
23524b572c Globally replace u_int*_t from (non-contributed) man pages.
The reasoning behind this, is that if we are consistent in our
documentation about the uint*_t stuff, people will be less tempted to
write new code that uses the non-standard types.

I am not going to bump the man page dates, as these changes can be
considered style nits. The meaning of the man pages is unaffected.

MFC after:	1 month
2012-02-12 18:29:56 +00:00
jamie
b4a5c1a064 Acknowledge that jail_attach and jail_remove can return EPERM.
MFC after:	1 week
2012-02-08 23:34:47 +00:00
tijl
3617a03b5b Move descriptions of file caching commands out of the file locking section.
Approved by:	kib (mentor)
2012-01-28 18:35:10 +00:00
pluknet
e97df4a901 Remove a left-over reference to make.conf(5) which was used as a place to
store the VM_STACK compile option to enable MAP_STACK support in its
earliest stage of development.

Found by:	mux
2012-01-27 13:26:19 +00:00
kib
676a5013ed Clarify the implementation-defined behaviour in case of close(2)
returning error.

MFC after:	1 week
2012-01-22 11:58:17 +00:00
pjd
da783c4b78 The sys/uio.h header is needed only for readv(2), preadv(2), writev(2) and
pwritev(2). Document it more precisely.

Reviewed by:	jilles
MFC after:	3 days
2012-01-22 11:15:48 +00:00
eadler
41fde08834 Make man page wording more clear:
PR:		docs/164078
Submitted by:	Taras <ds@ukrhub.net>
Approved by:	bcr
MFC after:	3 days
2012-01-15 20:14:52 +00:00
delphij
73078d5a8b Document the fact that chroot(2) is no longer part of POSIX since SUSv3
and add a SECURITY CONSIDERATIONS section for recommended practices.
2012-01-04 02:04:20 +00:00
pluknet
644e38ede6 Fix manual section for acl_get(3) and mac_get(3) family functions.
Reviewed by:	rwatson
MFC after:	1 week
2011-12-29 21:12:22 +00:00
delphij
d6760e1d0d Update rtprio(2) manual page to reflect the latest changes in -CURRENT as
well as provide documentation for rtprio_thread(2) system call.

MFC after:	1 month
X-MFC-after:	r228470
2011-12-27 10:34:00 +00:00
ru
e6144483bb The NOTE_COPY should have been named NOTE_FFCOPY from the very
beginning.

Submitted by:	Igor Sysoev
2011-12-07 11:06:18 +00:00
rwatson
e2b42734e6 Cross-reference capsicum.4 from cap_enter.2 and cap_new.2.
MFC after:	3 days
Sponsored by:	Google, Inc.
2011-11-27 19:45:41 +00:00
pluknet
244cd44176 Add history for setsockopt(2).
PR:		docs/162719
Submitted by:	Niclas Zeising <niclas at zeising gmail>
MFC after:	1 week
2011-11-21 14:36:19 +00:00
lstewart
cca3084242 - Add the ffclock_getcounter(), ffclock_getestimate() and ffclock_setestimate()
system calls to provide feed-forward clock management capabilities to
  userspace processes. ffclock_getcounter() returns the current value of the
  kernel's feed-forward clock counter. ffclock_getestimate() returns the current
  feed-forward clock parameter estimates and ffclock_setestimate() updates the
  feed-forward clock parameter estimates.

- Document the syscalls in the ffclock.2 man page.

- Regenerate the script-derived syscall related files.

Committed on behalf of Julien Ridoux and Darryl Veitch from the University of
Melbourne, Australia, as part of the FreeBSD Foundation funded "Feed-Forward
Clock Synchronization Algorithms" project.

For more information, see http://www.synclab.org/radclock/

Submitted by:	Julien Ridoux (jridoux at unimelb edu au)
2011-11-21 01:26:10 +00:00
kib
dbc322caab Fix typo.
Submitted by:	arundel
MFC after:	3 days
2011-11-17 13:14:07 +00:00
dougb
29c48cd31f Document that flock can return ENOLCK 2011-11-10 06:20:18 +00:00
jhb
78c075174e Add the posix_fadvise(2) system call. It is somewhat similar to
madvise(2) except that it operates on a file descriptor instead of a
memory region.  It is currently only supported on regular files.

Just as with madvise(2), the advice given to posix_fadvise(2) can be
divided into two types.  The first type provide hints about data access
patterns and are used in the file read and write routines to modify the
I/O flags passed down to VOP_READ() and VOP_WRITE().  These modes are
thus filesystem independent.  Note that to ease implementation (and
since this API is only advisory anyway), only a single non-normal
range is allowed per file descriptor.

The second type of hints are used to hint to the OS that data will or
will not be used.  These hints are implemented via a new VOP_ADVISE().
A default implementation is provided which does nothing for the WILLNEED
request and attempts to move any clean pages to the cache page queue for
the DONTNEED request.  This latter case required two other changes.
First, a new V_CLEANONLY flag was added to vinvalbuf().  This requests
vinvalbuf() to only flush clean buffers for the vnode from the buffer
cache and to not remove any backing pages from the vnode.  This is
used to ensure clean pages are not wired into the buffer cache before
attempting to move them to the cache page queue.  The second change adds
a new vm_object_page_cache() method.  This method is somewhat similar to
vm_object_page_remove() except that instead of freeing each page in the
specified range, it attempts to move clean pages to the cache queue if
possible.

To preserve the ABI of struct file, the f_cdevpriv pointer is now reused
in a union to point to the currently active advice region if one is
present for regular files.

Reviewed by:	jilles, kib, arch@
Approved by:	re (kib)
MFC after:	1 month
2011-11-04 04:02:50 +00:00
pluknet
c8a358b279 Fix typo in timer_getoverrun cross-reference.
MFC after:	3 days
2011-10-26 14:26:10 +00:00
des
9b8d9b3ed1 Add a new trace point, KTRFAC_CAPFAIL, which traces capability check
failures.  It is included in the default set for ktrace(1) and kdump(1).
2011-10-11 20:37:10 +00:00
des
71b88d2a56 Line up the struct declaration (yes, I know this isn't what it looks
like in the header file)
2011-10-09 10:58:58 +00:00
des
8f48698d32 Document some not-so-recently added trace points.
MFC after:	1 week
2011-10-09 10:55:15 +00:00
kib
e2b10ad687 Remove no longer needed BUGS section.
MFC after:	1 month
2011-10-06 17:35:38 +00:00
kib
9fc0ff740a Remove no longer valid statement about ARM.
MFC after:	1 month
2011-10-04 13:15:12 +00:00
kib
a9e2c1ebfb Clarify the behaviour of sigwait() on signal interruption, and note
the difference between sigwait() and sigtimedwait()/sigwaitinfo().

Approved by:	re (bz)
2011-08-25 10:00:38 +00:00
jonathan
5ecd1c9d40 Add experimental support for process descriptors
A "process descriptor" file descriptor is used to manage processes
without using the PID namespace. This is required for Capsicum's
Capability Mode, where the PID namespace is unavailable.

New system calls pdfork(2) and pdkill(2) offer the functional equivalents
of fork(2) and kill(2). pdgetpid(2) allows querying the PID of the remote
process for debugging purposes. The currently-unimplemented pdwait(2) will,
in the future, allow querying rusage/exit status. In the interim, poll(2)
may be used to check (and wait for) process termination.

When a process is referenced by a process descriptor, it does not issue
SIGCHLD to the parent, making it suitable for use in libraries---a common
scenario when using library compartmentalisation from within large
applications (such as web browsers). Some observers may note a similarity
to Mach task ports; process descriptors provide a subset of this behaviour,
but in a UNIX style.

This feature is enabled by "options PROCDESC", but as with several other
Capsicum kernel features, is not enabled by default in GENERIC 9.0.

Reviewed by: jhb, kib
Approved by: re (kib), mentor (rwatson)
Sponsored by: Google Inc
2011-08-18 22:51:30 +00:00
rwatson
0920e246c6 Cross-reference cap_new(2) from dup(2), as they have similar functionality.
Approved by:	re (kib)
2011-08-14 12:41:44 +00:00
jonathan
f77ff62fcd Add cap_new(2) and cap_getrights(2) symbols to libc.
These system calls have already been implemented in the kernel; now we
hook up libc symbols so userspace can drive them.

Approved by: re (kib), mentor (rwatson)
Sponsored by: Google Inc
2011-07-20 13:29:39 +00:00
kib
9ddcdc3611 Document RFTSIGZMB. Fix spelling of SIGCHLD. Note that signals are
delivered, not returned.

MFC after:	1 week
2011-07-12 20:38:42 +00:00
obrien
c0a3f38f33 Note how wait(3) is implemented. 2011-06-18 00:53:51 +00:00
jilles
3ee406db52 mq_setattr(2): Add missing const to man page.
The declaration in the header file is correct.

MFC after:	1 week
2011-05-17 21:03:34 +00:00
pluknet
d1dccbde28 Update sticky(7) cross references.
PR:		docs/124468
X-MFC with:	r218998
2011-05-13 16:29:57 +00:00
gjb
af070d163b - Clarification on kld_file_stat.size
- While here, remove a few C comments that don't seem to contribute
  anything additional to the man page.

PR:		146047
Submitted by:	arundel
MFC after:	3 days
2011-04-23 20:59:58 +00:00
mdf
9c9a32d97b Add the posix_fallocate(2) syscall. The default implementation in
vop_stdallocate() is filesystem agnostic and will run as slow as a
read/write loop in userspace; however, it serves to correctly
implement the functionality for filesystems that do not implement a
VOP_ALLOCATE.

Note that __FreeBSD_version was already bumped today to 900036 for any
ports which would like to use this function.

Also reserve space in the syscall table for posix_fadvise(2).

Reviewed by:	-arch (previous version)
2011-04-18 16:32:22 +00:00
jilles
413a619804 getfh(2): Add xrefs for fhopen(2), open(2), stat(2).
MFC after:	1 week
2011-04-14 22:06:11 +00:00
kib
2e921d1b1b Fix mdoc errors.
Submitted by:	ru
MFC after:	3 days
2011-04-01 19:57:27 +00:00
trasz
d5fad1aac8 Expose the rctl(2) API in libc. 2011-03-30 18:08:31 +00:00
kib
4dc12088a1 Document O_CLOEXEC.
Reviewed by:	jhb
MFC after:	1 week
2011-03-25 14:01:18 +00:00
marcel
70f17b3a42 When building libc with the syscall compatibility, don't also generate the
syscall assembly files. This results in conflicting dependencies and can
cause unexpected results for parallel builds. This is because the .c file
and the .S file both generate the same .o file.

Submitted by:	Simon Gerraty <sjg@juniper.net>
Sponsored by:	Juniper Networks
2011-03-17 04:40:37 +00:00
jilles
b7fd4888f8 rfork(2): Discourage rfork_thread-like approaches.
Calling rfork_thread(3) does not interoperate with pthreads and global state
is not properly protected.

Remove the BUGS section suggesting LinuxThreads entirely. With the current
pthread library libthr, all threads are kernel-level entities so there seems
little reason to use LinuxThreads.
2011-03-15 23:51:47 +00:00
rwatson
e7e662134b Move cap_enter(2) and cap_getmode(2) symbols from FBSD_1.1 to FBSD_1.2.
Suggested by:	kib
Obtained from:	Capsicum Project
Sponsored by:	Google
MFC after:	3 months
2011-03-12 12:10:17 +00:00
trasz
fb78109e59 Move getloginclass(2) and setloginclass(2) to FBSD_1.2, where they should've
been added in the first place.
2011-03-06 08:55:36 +00:00
trasz
3212fe1acf Add FBSD_1.2; syscalls added in 9-CURRENT are supposed to go there.
Suggested by:	kib
2011-03-06 08:52:59 +00:00
trasz
d9bca0ab24 Add manual page for getloginclass(2) and setloginclass(2). 2011-03-06 08:35:50 +00:00
trasz
62f6a13e39 Add two new system calls, setloginclass(2) and getloginclass(2). This makes
it possible for the kernel to track login class the process is assigned to,
which is required for RCTL.  This change also make setusercontext(3) call
setloginclass(2) and makes it possible to retrieve current login class using
id(1).

Reviewed by:	kib (as part of a larger patch)
2011-03-05 12:40:35 +00:00
rwatson
817c148c9f Make cap_new(2) and cap_getmode(2) symbols from libc public so applications
can link against them.  Add man pages for the new system calls, with one
errant forward reference to changes not yet present in FreeBSD, but soon
will be.

Reviewed by:	anderson
Obtained from:	Capsicum Project
Sponsored by:	Google, Inc.
Discussed with:	benl, kris, pjd
MFC after:	3 months
2011-03-03 11:31:08 +00:00
rwatson
698cb59fd5 Add description of ECAPMODE to errno(2) man page.
Discussed with: anderson
Obtained from:  Capsicum Project
Sponsored by:   Google, Inc.
MFC after:      3 months
2011-03-03 11:29:48 +00:00
pluknet
3061aea0d2 Remove sysctl vm.max_proc_mmap used to protect from KVA space exhaustion.
As it was pointed out by Alan Cox, that no longer serves its purpose with
the modern UMA allocator compared to the old one used in 4.x days.

The removal of sysctl eliminates max_proc_mmap type overflow leading to
the broken mmap(2) seen with large amount of physical memory on arches
with factually unbound KVA space (such as amd64).  It was found that
slightly less than 256GB of physmem was enough to trigger the overflow.

Reviewed by:	alc, kib
Approved by:	avg (mentor)
MFC after:	2 months
2011-02-24 09:22:56 +00:00
kib
736c72ab1a Emit .note.GNU-stack for the syscall stubs generated by libc only on
architectures that support this .note. In particular, do not unneccessary
emit the notes on ia64 and sparc64, which ABI require non-executable stacks.

Tested by:	marcel
2011-01-25 21:06:49 +00:00
kib
de1b195cba Document PT_FLAG_FORKED, PT_FOLLOW_FORK, pl_tdname and pl_child_pid.
MFC after:	2 weeks
2011-01-25 11:02:12 +00:00
jilles
54c963102e getgroups(2): Remove mention of <sys/param.h> and refer to sysconf(3).
Because {NGROUPS_MAX} may become variable, its value should be obtained
using sysconf(3). If a #define is used anyway, it should be obtained by
including <limits.h> as that is in POSIX like getgroups(2) itself is.
<sys/param.h> is not in POSIX.

MFC after:	1 week
2011-01-21 22:15:17 +00:00