Commit Graph

1463 Commits

Author SHA1 Message Date
Ed Schouten
6b99842ada 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 Gritton
e9d3a32ffd Acknowledge that jail_attach and jail_remove can return EPERM.
MFC after:	1 week
2012-02-08 23:34:47 +00:00
Tijl Coosemans
2cb08f8d7d Move descriptions of file caching commands out of the file locking section.
Approved by:	kib (mentor)
2012-01-28 18:35:10 +00:00
Sergey Kandaurov
a12406889a 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
Konstantin Belousov
7ff824218a Clarify the implementation-defined behaviour in case of close(2)
returning error.

MFC after:	1 week
2012-01-22 11:58:17 +00:00
Pawel Jakub Dawidek
e0c980d95d 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
Eitan Adler
4e529b6d78 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
Xin LI
6fe5169cff 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
Sergey Kandaurov
5f09751fe3 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
Xin LI
b0266169d4 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
Ruslan Ermilov
20df026c9a 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
Robert Watson
251944df31 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
Sergey Kandaurov
0a1c3432f6 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
Lawrence Stewart
cf13a58510 - 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
Konstantin Belousov
2cda7d0049 Fix typo.
Submitted by:	arundel
MFC after:	3 days
2011-11-17 13:14:07 +00:00
Doug Barton
cbbacf9bcc Document that flock can return ENOLCK 2011-11-10 06:20:18 +00:00
John Baldwin
936c09ac0f 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
Sergey Kandaurov
52f047eeac Fix typo in timer_getoverrun cross-reference.
MFC after:	3 days
2011-10-26 14:26:10 +00:00
Dag-Erling Smørgrav
c601ad8eeb 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
Dag-Erling Smørgrav
a6caae6fcf 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
Dag-Erling Smørgrav
516e986995 Document some not-so-recently added trace points.
MFC after:	1 week
2011-10-09 10:55:15 +00:00
Konstantin Belousov
a93672b3fe Remove no longer needed BUGS section.
MFC after:	1 month
2011-10-06 17:35:38 +00:00
Konstantin Belousov
5166b1fbe8 Remove no longer valid statement about ARM.
MFC after:	1 month
2011-10-04 13:15:12 +00:00
Konstantin Belousov
745e9ba27d 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 Anderson
cfb5f76865 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
Robert Watson
a3427d6a49 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 Anderson
1b7270658f 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
Konstantin Belousov
134e789b67 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
David E. O'Brien
a57971c679 Note how wait(3) is implemented. 2011-06-18 00:53:51 +00:00
Jilles Tjoelker
7a18096cea 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
Sergey Kandaurov
e2ea39cbdb Update sticky(7) cross references.
PR:		docs/124468
X-MFC with:	r218998
2011-05-13 16:29:57 +00:00
Glen Barber
796b74169c - 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
Matthew D Fleming
d91f88f7f3 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 Tjoelker
3472288282 getfh(2): Add xrefs for fhopen(2), open(2), stat(2).
MFC after:	1 week
2011-04-14 22:06:11 +00:00
Konstantin Belousov
05f2ecd1fa Fix mdoc errors.
Submitted by:	ru
MFC after:	3 days
2011-04-01 19:57:27 +00:00
Edward Tomasz Napierala
4f8c32aa62 Expose the rctl(2) API in libc. 2011-03-30 18:08:31 +00:00
Konstantin Belousov
bdadacaf66 Document O_CLOEXEC.
Reviewed by:	jhb
MFC after:	1 week
2011-03-25 14:01:18 +00:00
Marcel Moolenaar
3166a207c5 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 Tjoelker
dd888c677b 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
Robert Watson
792892ee17 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
Edward Tomasz Napierala
8ce58daf17 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
Edward Tomasz Napierala
e057276a4e 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
Edward Tomasz Napierala
7369a541f7 Add manual page for getloginclass(2) and setloginclass(2). 2011-03-06 08:35:50 +00:00
Edward Tomasz Napierala
2bfc50bc4f 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
Robert Watson
d2deca0335 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
Robert Watson
31cd487f40 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
Sergey Kandaurov
7ec9c8d170 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
Konstantin Belousov
f1410015f0 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
Konstantin Belousov
1567387db9 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 Tjoelker
198c89c306 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
Jilles Tjoelker
c3954e3936 mknod(2): The required include is <sys/stat.h>, not <unistd.h>.
This is what SUSv4 requires, and also the only thing that works if strict
standards compliance is requested or mknodat() is needed.

PR:		standards/123688
Submitted by:	gcooper
MFC after:	1 week
2011-01-16 21:59:50 +00:00
Konstantin Belousov
8863c9c75e Emit .note.GNU-stack for the syscall stubs generated by libc. 2011-01-07 14:28:54 +00:00
Rebecca Cran
e04b58b0cf Sort cross references by section.
Reported by: pluknet
2010-12-18 10:09:07 +00:00
Rebecca Cran
110ac7a3e4 Update shmget(2) with POSIX access permissions and remove non-standard SHM_R,
SHM_W and machine/param.h.
2010-12-17 21:10:08 +00:00
Luigi Rizzo
5c9d0a9ad3 This commit implements the SO_USER_COOKIE socket option, which lets
you tag a socket with an uint32_t value. The cookie can then be
used by the kernel for various purposes, e.g. setting the skipto
rule or pipe number in ipfw (this is the reason SO_USER_COOKIE has
been implemented; however there is nothing ipfw-specific in its
implementation).

The ipfw-related code that uses the optopn will be committed separately.

This change adds a field to 'struct socket', but the struct is not
part of any driver or userland-visible ABI so the change should be
harmless.

See the discussion at
http://lists.freebsd.org/pipermail/freebsd-ipfw/2009-October/004001.html

Idea and code from Paul Joe, small modifications and manpage
changes by myself.

Submitted by:	Paul Joe
MFC after:	1 week
2010-11-12 13:02:26 +00:00
Jaakko Heinonen
2feecf0bfb - Note that non-superusers are not allowed to set the SF_ARCHIVED
flag. [1]
- Note that also fchflags(2) will return EPERM for attempts to set or
  unset the SF_SNAPSHOT flag.

Submitted by:	Garrett Cooper [1]
MFC after:	1 week
2010-10-29 15:03:29 +00:00
Ulrich Spörlein
2914feeb7e mdoc: make pages render with mandoc
It's a bit more pedantic regarding .Bl list elements. This has an added
benefit of unbreaking the ipfw(8) manpage, where groff was silently
skipping one list element.
2010-10-21 12:27:13 +00:00
Jamie Gritton
40229872e4 Remove a section that went to jail(8), and fix a small grammar error. 2010-10-20 21:19:36 +00:00
Rui Paulo
565424b2fd Clang related fixes:
* When calling syslog(), pass a format string.
* Define YY_NO_INPUT on nslexer.l

Submitted by:	Norberto Lopes <nlopes.ml at gmail.com>
2010-10-13 16:57:06 +00:00
Ulrich Spörlein
0d9deed52c mdoc: drop redundant .Pp and .LP calls
They have no effect when coming in pairs, or before .Bl/.Bd
2010-10-08 12:40:16 +00:00
Alan Cox
8f7f5a7f26 Fix exec_imgact_shell()'s handling of two error cases: (1) Previously, if
the first line of a script exceeded MAXSHELLCMDLEN characters, then
exec_imgact_shell() silently truncated the line and passed on the truncated
interpreter name or argument.  Now, exec_imgact_shell() will fail and return
ENOEXEC, which is the commonly used errno among Unix variants for this type
of error. (2) Previously, exec_imgact_shell()'s check on the length of the
interpreter's name was ineffective.  In other words, exec_imgact_shell()
could not possibly fail and return ENAMETOOLONG.  The reason being that the
length of the interpreter name had to exceed MAXSHELLCMDLEN characters in
order that ENAMETOOLONG be returned.  But, the search for the end of the
interpreter name stops after at most MAXSHELLCMDLEN - 2 characters are
scanned.  (In the end, this particular error is eventually discovered
outside of exec_imgact_shell() and ENAMETOOLONG is returned.  So, the real
effect of this second change is that the error is detected earlier, in
exec_imgact_shell().)

Update the definition of MAXINTERP to the actual limit on the size of
the interpreter name that has been in effect since r142453 (from
2005).

In collaboration with: kib
2010-09-21 16:24:51 +00:00
Glen Barber
416d1e6f23 Bump dates in dbopen(3) and cpuset_getaffinity(2) from r212441 and
r212438, repectively.

Approved by:	keramida (mentor)
MFC after:	1 week
2010-09-12 14:04:05 +00:00
Glen Barber
cbd5df1c04 Add EINVAL to list of possible return values for cpuset_getaffinity(2).
PR:		149978
Submitted by:	gcooper
Patch by:	gcooper
Approved by:	keramida (mentor)
MFC after:	1 week
2010-09-10 23:15:05 +00:00
David Xu
83c9e0893f Because POSIX does not allow EINTR to be returned from sigwait(),
add a wrapper for it in libc and rework the code in libthr, the
system call still can return EINTR, we keep this feature.

Discussed on: thread
Reviewed by:  jilles
2010-09-10 01:47:37 +00:00
Glen Barber
1bc1532c36 Add ECONNRESET to list of possible errors in connect(2).
PR:		148683
Submitted by:	Gennady Proskurin <gpr at mail dot ru>
Approved by:	keramida (mentor)
MFC after:	1 week
2010-09-06 21:39:54 +00:00
Konstantin Belousov
da881cad07 Use NULL instead of 0 for pointer in example.
MFC after:	3 days
2010-08-29 16:38:08 +00:00
Alan Cox
74ffb9af15 Add the MAP_PREFAULT_READ option to mmap(2).
Reviewed by:	jhb, kib
2010-08-28 16:57:07 +00:00
Rebecca Cran
e7f8dd75b3 Fix incorrect usage of 'assure' and 'insure'.
Approved by: rrs (mentor)
2010-08-28 16:32:01 +00:00
Warner Losh
2c0959ae6b Powerpc is special here. powerpc and powerpc64 use different ABIs, so
their implementations aren't in the same files.  Introduce LIBC_ARCH
and use that in preference to MACHINE_CPUARCH.  Tested by amd64 and
powerpc64 builds (thanks nathanw@)
2010-08-24 20:54:43 +00:00
Konstantin Belousov
3e3fbd3f25 Remove extra FreeBSD tag.
MFC after:	3 days
2010-08-24 13:02:22 +00:00
Konstantin Belousov
da2a0df59c Move the __stack_chk_fail_local@FBSD_1.0 compat symbol definition into
the separate .o for libc_pic.a. This prevents rtld from making the
symbol global.

Putting the stack_protector_compat.c into the public domain acknowledged
by kan.

Reviewed by:	kan
MFC after:	2 weeks
2010-08-24 12:58:54 +00:00
Warner Losh
25faff346c MFtbemd:
Prefer MACHNE_CPUARCH to MACHINE_ARCH in most contexts where you want
to test of all the CPUs of a given family conform.
2010-08-23 22:24:11 +00:00
Konstantin Belousov
2793b01844 Use aux vector to get values for SSP canary, pagesize, pagesizes array,
number of host CPUs and osreldate.

This eliminates the last sysctl(2) calls from the dynamically linked image
startup.

No objections from:	kan
Tested by:	marius (sparc64)
MFC after:	1 month
2010-08-17 09:13:26 +00:00
Joel Dahl
c2025a7660 Fix typos, spelling, formatting and mdoc mistakes found by Nobuyuki while
translating these manual pages.  Minor corrections by me.

Submitted by:	Nobuyuki Koganemaru <n-kogane@syd.odn.ne.jp>
2010-08-16 15:18:30 +00:00
Joel Dahl
f6ac23919b Fix typos and spelling mistakes. 2010-08-06 14:33:42 +00:00
Joel Dahl
edfa427cf1 Spelling fixes. 2010-08-02 16:01:45 +00:00
Ulrich Spörlein
32ba16b6e6 Fix a couple of typos.
PR:		docs/148891
Submitted by:	olgeni
MFC after:	1 week
2010-07-30 11:58:18 +00:00
Edward Tomasz Napierala
d8561f0a50 Update mlockall(2) to mention that it's superuser-only syscall, just
like the mlock(2) manual page says.  Update mlock(2) to say that hitting
RLIMIT_MEMLOCK results in ENOMEM, not EAGAIN.

MFC after:	1 month
2010-07-27 20:34:37 +00:00
Konstantin Belousov
cefac16712 Document pl_siginfo and PT_FLAG_SI for PT_LWPINFO.
MFC after:	1 month
2010-07-10 14:31:44 +00:00
Pawel Jakub Dawidek
da6ee3126b Just like in case of setgroups(2), for getgroups(2) also advice including
sys/param.h instead of sys/types.h so we get NGROUPS_MAX and NGROUPS
definitions.
2010-06-26 21:44:05 +00:00
Ulrich Spörlein
ef8a3e5cf2 mdoc: remove literal tabs where they don't belong 2010-06-08 16:48:59 +00:00
Colin Percival
8fd6c56d29 Change the current working directory to be inside the jail created by
the jail(8) command. [10:04]

Fix a one-NUL-byte buffer overflow in libopie. [10:05]

Correctly sanity-check a buffer length in nfs mount. [10:06]

Approved by:	so (cperciva)
Approved by:	re (kensmith)
Security:	FreeBSD-SA-10:04.jail
Security:	FreeBSD-SA-10:05.opie
Security:	FreeBSD-SA-10:06.nfsclient
2010-05-27 03:15:04 +00:00
Konstantin Belousov
0475ecd50a Improve the documentation for PT_LWPINFO. Note that some features are
not implemented on MIPS and ARM.

MFC after:	1 month
2010-05-24 17:23:14 +00:00
Ulrich Spörlein
0afc94c17a mdoc: move CAVEATS, BUGS and SECURITY CONSIDERATIONS sections to the
bottom of the manpages and order them consistently.

GNU groff doesn't care about the ordering, and doesn't even mention
CAVEATS and SECURITY CONSIDERATIONS as common sections and where to put
them.

Found by:	mdocml lint run
Reviewed by:	ru
2010-05-13 12:07:55 +00:00
Christian Brueffer
0b35d6a71b Document FIONREAD, FIONWRITE and FIONSPACE.
Obtained from:	NetBSD
Submitted by:	emaste
MFC after:	1 week
2010-05-11 17:02:12 +00:00
Jilles Tjoelker
b88c83ff14 sigprocmask(2): pthread_sigmask(3) must be used in threaded processes.
Although libthr's pthread_sigmask() just calls sigprocmask() and this is
unlikely to change, mention this POSIX requirement on applications.

MFC after:	1 week
2010-05-07 20:46:22 +00:00
Kirk McKusick
e27ed89aef Merger of the quota64 project into head.
This joint work of Dag-Erling Smørgrav and myself updates the
FFS quota system to support both traditional 32-bit and new 64-bit
quotas (for those of you who want to put 2+Tb quotas on your users).

By default quotas are not compiled into the kernel. To include them
in your kernel configuration you need to specify:

options         QUOTA                   # Enable FFS quotas

If you are already running with the current 32-bit quotas, they
should continue to work just as they have in the past. If you
wish to convert to using 64-bit quotas, use `quotacheck -c 64';
if you wish to revert from 64-bit quotas back to 32-bit quotas,
use `quotacheck -c 32'.

There is a new library of functions to simplify the use of the
quota system, do `man quotafile' for details. If your application
is currently using the quotactl(2), it is highly recommended that
you convert your application to use the quotafile interface.
Note that existing binaries will continue to work.

Special thanks to John Kozubik of rsync.net for getting me
interested in pursuing 64-bit quota support and for funding
part of my development time on this project.
2010-05-07 00:41:12 +00:00
Jilles Tjoelker
c84cab5626 Update xrefs from 4.3BSD to modern signal functions in various man pages.
sigvec(2) references have been updated to sigaction(2), sigsetmask(2) and
sigblock(2) to sigprocmask(2), sigpause(2) to sigsuspend(2).

Some legacy man pages still refer to them, that is OK.
2010-05-06 22:49:54 +00:00
Jilles Tjoelker
29b7bdea79 sigaltstack(2): document some modernizations:
* un-document 'struct sigaltstack' tag for stack_t as this is BSD-specific;
  this doesn't seem useful enough to document as such
* alternate stacks are per thread, not per process
* update error codes to what the kernel does and POSIX requires

MFC after:	1 week
2010-05-06 22:06:14 +00:00
Kirk McKusick
945f418ab8 Final update to current version of head in preparation for reintegration. 2010-05-06 17:37:23 +00:00
Konstantin Belousov
f742a317e6 Document RUSAGE_THREAD.
Reviewed by:	bde
MFC after:	1 week
2010-05-04 06:01:25 +00:00
Kirk McKusick
a4bf5fb987 Update to current version of head. 2010-04-28 05:33:59 +00:00
Jilles Tjoelker
b559746adb unlinkat(2): unlinkat(AT_REMOVEDIR) fails with ENOTEMPTY like rmdir()
for non-empty directories.

POSIX permits both ENOTEMPTY and EEXIST, but we use the clearer ENOTEMPTY,
following BSD tradition.

MFC after:	1 week
2010-04-25 13:55:52 +00:00
Konstantin Belousov
8d03319930 Revert r206649.
Simplify the presented declaration of struct sigaction, noting the
caveat in the text. Real layout of the structure and exposed
implementation namespace only obfuscates the usage.

Submitted by:	bde
MFC after:	3 days
2010-04-18 18:23:11 +00:00
Konstantin Belousov
fdfa00ba83 Still reference struct __sigaction with clarification when this form
of argument declaration is needed.

Discussed with:	bde
MFC after:	3 days
2010-04-15 08:32:50 +00:00
Konstantin Belousov
c720aa5217 Align the declaration for sa_sigaction with POSIX.
MFC after:	3 days
2010-04-13 08:56:03 +00:00
Ed Schouten
435d267423 Don't forget to bump the date in the man page. 2010-03-28 13:40:13 +00:00
Ed Schouten
510ea843ba Rename st_*timespec fields to st_*tim for POSIX 2008 compliance.
A nice thing about POSIX 2008 is that it finally standardizes a way to
obtain file access/modification/change times in sub-second precision,
namely using struct timespec, which we already have for a very long
time. Unfortunately POSIX uses different names.

This commit adds compatibility macros, so existing code should still
build properly. Also change all source code in the kernel to work
without any of the compatibility macros. This makes it all a less
ambiguous.

I am also renaming st_birthtime to st_birthtim, even though it was a
local extension anyway. It seems Cygwin also has a st_birthtim.
2010-03-28 13:13:22 +00:00
John Baldwin
5711bf30da Reject attempts to create a MAP_ANON mapping with a non-zero offset.
PR:		kern/71258
Submitted by:	Alexander Best
MFC after:	2 weeks
2010-03-23 21:08:07 +00:00
Ed Schouten
0fef797f4a Actually make O_DIRECTORY work.
According to POSIX open() must return ENOTDIR when the path name does
not refer to a path name. Change vn_open() to respect this flag. This
also simplifies the Linuxolator a bit.
2010-03-21 20:43:23 +00:00
Kirk McKusick
516ad57b74 Debugging nits found while testing the new 64-bit quota code. 2010-03-16 06:12:30 +00:00
Joel Dahl
e1c6ef6aa4 The NetBSD Foundation has granted permission to remove clause 3 and 4 from
their software.

Obtained from:	NetBSD
2010-03-02 17:20:04 +00:00
Poul-Henning Kamp
82c59e57f3 Mention EISDIR as a possible errno. 2010-02-17 09:11:21 +00:00
Marcel Moolenaar
162110273c o Add support for COMPAT_IA32.
o  Incorporate review comments:
   -  Properly reference and lock the map
   -  Take into account that the VM map can change inbetween requests
   -  Add the fileid and fsid attributes

Credits: kib@
Reviewed by: kib@
2010-02-11 18:00:53 +00:00
Marcel Moolenaar
90b4621a5f Add PT_VM_TIMESTAMP and PT_VM_ENTRY so that the tracing process can
obtain the memory map of the traced process. PT_VM_TIMESTAMP can be
used to check if the memory map changed since the last time to avoid
iterating over all the VM entries unnecesarily.

MFC after:	1 month
2010-02-09 05:52:35 +00:00
Robert Watson
992a6ccc1f You must include fcntl.h (in practice) to be able to do anything useful
with shm_open(2), as otherwise the O_ flags are undefined.

MFC after:	3 days
2010-01-29 10:32:01 +00:00
Edward Tomasz Napierala
a4d3a13010 Add information about when nmount(2) was introduced. 2010-01-26 17:21:25 +00:00
Pawel Jakub Dawidek
bb30676c15 The waitpid(2) function needs neither sys/time.h nor sys/resource.h. 2010-01-20 22:26:36 +00:00
Christian Brueffer
a47698f8d6 Miscellaneous mdoc, spelling and inconsistency fixes.
PR:		142573, 142576 (mostly)
Submitted by:	brucec
MFC after:	1 week
2010-01-12 21:45:03 +00:00
Xin LI
777f8cebf3 Add a set of manual pages for pthread[_attr]_[sg]etaffinity(3).
Reviewed by:	davidxu
MFC after:	2 weeks
2010-01-09 12:31:11 +00:00
Konstantin Belousov
4319da1319 Further fix grammar.
Suggested by:	alc
MFC after:	3 days
2010-01-07 21:14:46 +00:00
Christian Brueffer
44640a5251 Fix a typo and bump date for the previous commit. 2010-01-07 21:08:22 +00:00
Konstantin Belousov
0b56296772 Give some information on SF_MNOWAIT flag.
MFC after:	3 days
2010-01-07 13:31:00 +00:00
Brooks Davis
a6fffd6cb0 The devices that supported EVFILT_NETDEV kqueue filters were removed in
r195175.  Remove all definitions, documentation, and usage.

fifo_misc.c:
	Remove all kqueue tests as fifo_io.c performs all those that
	would have remained.

Reviewed by:	rwatson
MFC after:	3 weeks
X-MFC note:	don't change vlan_link_state() function signature
2009-12-31 20:29:58 +00:00
Konstantin Belousov
d439b6c223 Document _FAST and _PRECISE clocks.
Submitted by:	Valentin Nechayev <netch segfault kiev ua>
MFC after:	3 days
2009-12-29 15:58:10 +00:00
Konstantin Belousov
5d2874abdd Document CLOCK_SECOND, add cross-reference from time(3) to clock_gettime(2).
Based on submission by:	pluknet gmail com
MFC after:	3 days
2009-12-29 14:29:08 +00:00
Jilles Tjoelker
d32b247049 cpuset(2): fix a typo and a markup error in the man page
MFC after:	1 week
2009-12-15 21:02:29 +00:00
Ed Schouten
2c201a9afe Fix many "function declaration isn't a prototype" warnings in libc.
I've only fixed code that seems to be written by `us'. There are still
many warnings like this present in resolv/, rpc/, stdtime/ and yp/.
2009-12-05 19:31:38 +00:00
Giorgos Keramidas
84518325ab Describe what setpgid(2) does when pgid=0. The text has been
copied from NetBSD's manpage, and it also matches the behavior
described by the Open Group's online copy of setpgid.2 at
http://www.opengroup.org/onlinepubs/009695399/functions/setpgid.html

Obtained from:	NetBSD
Submitted by:	Petros Barbayiannis <petrosbarbayiannis@yahoo.gr>
MFC after:	1 week
2009-12-01 06:12:31 +00:00
Christian Brueffer
4c1195a4d1 Remove a note about vfork(4) going to be eliminated, it's here to stay.
Submitted by:	kib
MFC after:	1 week
2009-11-13 13:26:27 +00:00
Christian Brueffer
62bf66541e Improved the manpage description. The committed wording
was provided by jhb.

PR:		140528
Submitted by:	Chris Petrik <chris@officialunix.com>
Discussed with:	remko, jhb and the submitter
MFC after:	1 week
2009-11-13 13:13:35 +00:00
Ed Schouten
54a1c2b5aa Add MAP_ANONYMOUS.
Many operating systems also provide MAP_ANONYMOUS. It's not hard to
support this ourselves, we'd better add it to make it more likely for
applications to work out of the box.

Reviewed by:	alc (mman.h)
2009-11-06 07:17:31 +00:00
Colin Percival
4054af4fb0 Attempt to reduce accidental foot-shooting by pointing out that
accept(2)ed sockets do not necessarily inherit O_NONBLOCK from
listening sockets on non-FreeBSD platforms.

Feet shot:	cperciva
MFC after:	1 month
2009-11-02 07:21:13 +00:00
Konstantin Belousov
9a714660ef Move pselect(3) man page to section 2.
Noted by:	jhb
MFC after:	1 month
2009-10-28 11:14:32 +00:00
Konstantin Belousov
066d836b02 Current pselect(3) is implemented in usermode and thus vulnerable to
well-known race condition, which elimination was the reason for the
function appearance in first place. If sigmask supplied as argument to
pselect() enables a signal, the signal might be delivered before thread
called select(2), causing lost wakeup. Reimplement pselect() in kernel,
making change of sigmask and sleep atomic.

Since signal shall be delivered to the usermode, but sigmask restored,
set TDP_OLDMASK and save old mask in td_oldsigmask. The TDP_OLDMASK
should be cleared by ast() in case signal was not gelivered during
syscall execution.

Reviewed by:	davidxu
Tested by:	pho
MFC after:	1 month
2009-10-27 10:55:34 +00:00
Jilles Tjoelker
29670497af Make openat(2) a cancellation point.
This is required by POSIX and matches open(2).

Reviewed by:	kib, jhb
MFC after:	1 month
2009-10-11 20:19:45 +00:00
Konstantin Belousov
0a747fb23c In nanosleep(2), note that the calling thread is put to sleep, not the
whole process. Also explicitely name the parameter that specifies
sleep interval.
2009-10-11 16:23:11 +00:00
David Schultz
6cc40ae58b Document errno codes added in r144530. 2009-10-11 00:08:55 +00:00
Robert Watson
44a43f00ed Add a new errno, ENOTCAPABLE, to be returned when a process requests an
operation on a file descriptor that is not authorized by the descriptor's
capability flags.

MFC after:	1 month
Sponsored by:	Google
2009-10-07 20:20:51 +00:00
Xin LI
82aebf697c Add two new fcntls to enable/disable read-ahead:
- F_READAHEAD: specify the amount for sequential access.  The amount is
   specified in bytes and is rounded up to nearest block size.
 - F_RDAHEAD: Darwin compatible version that use 128KB as the sequential
   access size.

A third argument of zero disables the read-ahead behavior.

Please note that the read-ahead amount is also constrainted by sysctl
variable, vfs.read_max, which may need to be raised in order to better
utilize this feature.

Thanks Igor Sysoev for proposing the feature and submitting the original
version, and kib@ for his valuable comments.

Submitted by:	Igor Sysoev <is rambler-co ru>
Reviewed by:	kib@
MFC after:	1 month
2009-09-28 16:59:47 +00:00
Christian Brueffer
8fba046b09 Fix setfib(1) section number.
PR:		133765
Submitted by:	Konstantin Zolotukhin <erebus@gorodok.net>
MFC after:	3 days
2009-09-18 14:17:00 +00:00
Alexander Kabaev
e330a6a59e Make libc.a provide __stack_chk_fail_local weak alias. This is
needed to satisfy static libraries that are compiled with -fpic
and linked into static binary afterwards. Several libraries in
gcc are examples of such static libs.
2009-09-17 13:21:53 +00:00
Stacey Son
fdc1a1131e Add EV_RECEIPT to kevents.
EV_RECEIPT is useful to disambiguating error conditions when multiple
events structures are passed to kevent(2).  The error code is returned
in the data field and EV_ERROR is set.

Approved by:	rwatson (co-mentor)
2009-09-16 03:49:54 +00:00
Stacey Son
1a921c410a Add the EV_DISPATCH flag to kevents.
When the EV_DISPATCH flag is used the event source will be disabled
immediately after the delivery of an event.   This is similar to the
EV_ONESHOT flag but it doesn't delete the event.

Approved by:	rwatson (co-mentor)
2009-09-16 03:37:39 +00:00
Stacey Son
2c2e449905 Add EVFILT_USER to kevents.
Add user events support to kernel events which are not associated with any
kernel mechanism but are triggered by user level code.  This is useful for
adding user level events to an event handler that may also be monitoring
kernel events.

Approved by:	rwatson (co-mentor)
2009-09-16 03:30:12 +00:00
Pawel Jakub Dawidek
cfef209a71 Synchornize description in manual page with strerror() output. 2009-09-06 07:22:09 +00:00
Alan Cox
5592fb2f9b Eliminate a stale paragraph from the BUGS section. This "bug" was
eliminated in r195693.

Approved by:	re (kensmith)
2009-07-26 06:38:56 +00:00
Jilles Tjoelker
22e4c1c47c Correct AT_SYMLINK_FOLLOW flag name in linkat(2) man page.
Approved by:	re (kib), ed (mentor)
2009-07-19 16:48:25 +00:00
Alexander Kabaev
2286fe7635 Second attempt at eliminating .text relocations in shared libraries
compiled with stack protector.

Use libssp_nonshared library to pull __stack_chk_fail_local symbol into
each library that needs it instead of pulling it from libc. GCC
generates local calls to this function which result in absolute
relocations put into position-independent code segment, making dynamic
loader do extra work every time given shared library is being relocated
and making affected text pages non-shareable.

Reviewed by:        kib
Approved by:        re (kib)
2009-07-14 21:19:13 +00:00
John Baldwin
0fe0ed8bf8 - Change mmap() to fail requests with EINVAL that pass a length of 0. This
behavior is mandated by POSIX.
- Do not fail requests that pass a length greater than SSIZE_MAX
  (such as > 2GB on 32-bit platforms).  The 'len' parameter is actually
  an unsigned 'size_t' so negative values don't really make sense.

Submitted by:	Alexander Best  alexbestms at math.uni-muenster.de
Reviewed by:	alc
Approved by:	re (kib)
MFC after:	1 week
2009-07-14 19:45:36 +00:00
Edward Tomasz Napierala
e64e7115aa Move msg{snd,recv,get,ctl} manual pages from section 3 to 2.
Approved by:	re (kib)
2009-07-13 12:53:43 +00:00
Edward Tomasz Napierala
c38898116a There is an optimization in chmod(1), that makes it not to call chmod(2)
if the new file mode is the same as it was before; however, this
optimization must be disabled for filesystems that support NFSv4 ACLs.
Chmod uses pathconf(2) to determine whether this is the case - however,
pathconf(2) always follows symbolic links, while the 'chmod -h' doesn't.

This change adds lpathconf(3) to make it possible to solve that problem
in a clean way.

Reviewed by:	rwatson (earlier version)
Approved by:	re (kib)
2009-07-08 15:23:18 +00:00
Pawel Jakub Dawidek
69a789b985 - Don't suggest opening file for writing in preparation for fexecve(2).
- execve(2)/fexecve(2) won't return ETXTBSY if file is open for reading.

Approved by:	re (kib)
2009-07-05 20:20:09 +00:00
Edward Tomasz Napierala
bc8036862b Make it clear where to look for for protocol-specific socket options.
Reviewed by:	rwatson
Approved by:	re (kib)
2009-06-30 20:53:56 +00:00
Konstantin Belousov
8c8484d103 Make the structure definitions in the man pages match the real code, and
remove no longer valid caution.

Approved by:	re (kensmith)
2009-06-29 18:54:17 +00:00
Alexander Kabaev
d48890cfb8 Back out previous revision until better tested fix is ready.
Approved by: re (impliciti, by approving previos check-in)
2009-06-29 01:33:59 +00:00
Alexander Kabaev
a162c9ae9c Eliminate .text relocations in shared libraries compiled with stack protector.
Use libssp_nonshared library to pull __stack_chk_fail_local symbol into
each library that needs it instead of pulling it from libc. GCC generates
local calls to this function which result in absolute relocations put into
position-independent code segment, making dynamic loader do extra work everys
time given shared library is being relocated and making affected text pages
non-shareable.

Reviewed by:        kib
Approved by:        re (kensmith)
2009-06-28 23:51:39 +00:00
Edward Tomasz Napierala
ca48e73a18 Bump manual page timestamps. 2009-06-25 12:53:50 +00:00
Edward Tomasz Napierala
aa015c8e4a Add NFSv4 ACL support to libc.
This adds the following functions to the acl(3) API: acl_add_flag_np,
acl_clear_flags_np, acl_create_entry_np, acl_delete_entry_np,
acl_delete_flag_np, acl_get_extended_np, acl_get_flag_np, acl_get_flagset_np,
acl_set_extended_np, acl_set_flagset_np, acl_to_text_np, acl_is_trivial_np,
acl_strip_np, acl_get_brand_np.  Most of them are similar to what Darwin
does.  There are no backward-incompatible changes.

Approved by:    rwatson@
2009-06-25 12:46:59 +00:00
John Baldwin
b648d4806b Change the ABI of some of the structures used by the SYSV IPC API:
- The uid/cuid members of struct ipc_perm are now uid_t instead of unsigned
  short.
- The gid/cgid members of struct ipc_perm are now gid_t instead of unsigned
  short.
- The mode member of struct ipc_perm is now mode_t instead of unsigned short
  (this is merely a style bug).
- The rather dubious padding fields for ABI compat with SV/I386 have been
  removed from struct msqid_ds and struct semid_ds.
- The shm_segsz member of struct shmid_ds is now a size_t instead of an
  int.  This removes the need for the shm_bsegsz member in struct
  shmid_kernel and should allow for complete support of SYSV SHM regions
  >= 2GB.
- The shm_nattch member of struct shmid_ds is now an int instead of a
  short.
- The shm_internal member of struct shmid_ds is now gone.  The internal
  VM object pointer for SHM regions has been moved into struct
  shmid_kernel.
- The existing __semctl(), msgctl(), and shmctl() system call entries are
  now marked COMPAT7 and new versions of those system calls which support
  the new ABI are now present.
- The new system calls are assigned to the FBSD-1.1 version in libc.  The
  FBSD-1.0 symbols in libc now refer to the old COMPAT7 system calls.
- A simplistic framework for tagging system calls with compatibility
  symbol versions has been added to libc.  Version tags are added to
  system calls by adding an appropriate __sym_compat() entry to
  src/lib/libc/incldue/compat.h. [1]

PR:		kern/16195 kern/113218 bin/129855
Reviewed by:	arch@, rwatson
Discussed with:	kan, kib [1]
2009-06-24 21:10:52 +00:00