Commit Graph

90 Commits

Author SHA1 Message Date
Pedro F. Giffuni
8a16b7a18f General further adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.
2017-11-20 19:49:47 +00:00
Warner Losh
fbbd9655e5 Renumber copyright clause 4
Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is too pedantic, so give up on that point.

Submitted by:	Jan Schaumann <jschauma@stevens.edu>
Pull Request:	https://github.com/freebsd/freebsd/pull/96
2017-02-28 23:42:47 +00:00
Craig Rodrigues
5e939c7dcb Use ANSI C prototypes. Eliminates -Wold-style-definition warnings. 2015-09-20 20:53:24 +00:00
Craig Rodrigues
0b64c636db Add declaration to eliminate -Wmissing-prototypes warning 2015-09-20 04:21:44 +00:00
Konstantin Belousov
bd6060a1c6 Switch libc from using _sig{procmask,action,suspend} symbols, which
are aliases for the syscall stubs and are plt-interposed, to the
libc-private aliases of internally interposed sigprocmask() etc.

Since e.g. _sigaction is not interposed by libthr, calling signal()
removes thr_sighandler() from the handler slot etc.  The result was
breaking signal semantic and rtld locking.

The added __libc_sigprocmask and other symbols are hidden, they are
not exported and cannot be called through PLT.  The setjmp/longjmp
functions for x86 were changed to use direct calls, and since
PIC_PROLOGUE only needed for functional PLT indirection on i386, it is
removed as well.

The PowerPC bug of calling the syscall directly in the setjmp/longjmp
implementation is kept as is.

Reported by:	Pete French <petefrench@ingresso.co.uk>
Tested by:	Michiel Boland <boland37@xs4all.nl>
Reviewed by:	jilles (previous version)
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
2015-08-29 14:25:01 +00:00
Konstantin Belousov
397d851d66 Reduce the size of the interposing table and amount of
cancellation-handling code in the libthr.  Translate some syscalls
into their more generic counterpart, and remove translated syscalls
from the table.

List of the affected syscalls:
creat, open -> openat
raise -> thr_kill
sleep, usleep -> nanosleep
pause -> sigsuspend
wait, wait3, waitpid -> wait4

Suggested and reviewed by:	jilles (previous version)
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
2015-01-11 22:16:31 +00:00
Konstantin Belousov
8495e8b1e9 Fix known issues which blow up the process after dlopen("libthr.so")
(or loading a dso linked to libthr.so into process which was not
linked against threading library).

- Remove libthr interposers of the libc functions, including
  __error(). Instead, functions calls are indirected through the
  interposing table, similar to how pthread stubs in libc are already
  done.  Libc by default points either to syscall trampolines or to
  existing libc implementations.  On libthr load, libthr rewrites the
  pointers to the cancellable implementations already in libthr.  The
  interposition table is separate from pthreads stubs indirection
  table to not pull pthreads stubs into static binaries.

- Postpone the malloc(3) internal mutexes initialization until libthr
  is loaded.  This avoids recursion between calloc(3) and static
  pthread_mutex_t initialization.

- Reinstall signal handlers with wrapper on libthr load.  The
  _rtld_is_dlopened(3) is used to avoid useless calls to sigaction(2)
  when libthr is statically referenced from the main binary.

In the process, fix openat(2), swapcontext(2) and setcontext(2)
interposing.  The libc symbols were exported at different versions
than libthr interposers.  Export both libc and libthr versions from
libc now, with default set to the higher version from libthr.

Remove unused and disconnected swapcontext(3) userspace implementation
from libc/gen.

No objections from:	deischen
Tested by:	pho, antoine (exp-run) (previous versions)
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
2015-01-03 18:38:46 +00:00
Marcel Moolenaar
8876613dc5 Replace use of ${.CURDIR} by ${LIBC_SRCTOP} and define ${LIBC_SRCTOP}
if not already defined. This allows building libc from outside of
lib/libc using a reach-over makefile.

A typical use-case is to build a standard ILP32 version and a COMPAT32
version in a single iteration by building the COMPAT32 version using a
reach-over makefile.

Obtained from:	Juniper Networks, Inc.
2014-03-04 02:19:39 +00:00
Eitan Adler
c965707311 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
Glen Barber
9f63b42217 General mdoc(7) and typo fixes.
PR:		167713
Submitted by:	Nobuyuki Koganemaru (kogane!jp.freebsd.org)
2012-05-08 18:56:21 +00:00
Ed Schouten
effed41a0b Remove non-existing error condition.
Just like kill(2), it is impossible for killpg(0, ...) to fail with
ESRCH, as a process always has a process group.

Discussed on:	arch@
MFC after:	1 week
2012-03-15 21:19:50 +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
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
e2b801ddd9 Verify return value of the sigset manipulation functions
to catch invalid signal numbers [1]. Use consistent style of
not assigning the return value to a local variable.

Reported by:	Garrett Cooper <yanegomi gmail com> [1]
MFC after:	1 week
2010-07-22 09:14:18 +00:00
Konstantin Belousov
5ebe96648b For xsi_sigpause(3), remove the supplied signal from the process mask
during sigpause(2) call. It was backward.
Check that the signal number is valid.

Reported by:	Garrett Cooper <yanegomi gmail com>
MFC after:	1 week
2010-07-12 10:14:24 +00:00
Ulrich Spörlein
668d8dd3c8 These features will first appear in 8.1, soon to be released
MFC after:	3 days
2010-05-24 11:14:40 +00:00
Ulrich Spörlein
63d46d1d5e Fix several typos in macros or macro misusage.
Found by:	make manlint
Reviewed by:	ru
Approved by:	philip (mentor)
2010-03-12 10:01:06 +00:00
Konstantin Belousov
9a6ceacede Implement sighold, sigignore, sigpause, sigrelse, sigset functions
from SUSv4 XSI. Note that the functions are obsoleted, and only
provided to ease porting from System V-like systems. Since sigpause
already exists in compat with different interface, XSI sigpause is
named xsi_sigpause.

Reviewed by:	davidxu
MFC after:	3 weeks
2009-11-26 13:49:37 +00:00
Daniel Eischen
5f864214bb Use C comments since we now preprocess these files with CPP. 2007-04-29 14:05:22 +00:00
Warner Losh
c879ae3536 Per Regents of the University of Calfornia letter, remove advertising
clause.

# If I've done so improperly on a file, please let me know.
2007-01-09 00:28:16 +00:00
Maxim Konovalov
5c35171af3 o From kern_prot.c::p_cansignal():
UNIX signalling semantics require that processes in the same
session always be able to deliver SIGCONT to one another,
overriding the remaining protections.

Fix SIGCONT special case description similar to rev. 1.22 kill.2.

PR:		docs/58710
Submitted by:	Ryan Younce
MFC after:	2 weeks
2006-10-10 11:37:41 +00:00
Daniel Eischen
6fad3aaf15 Add each directory's symbol map file to SYM_MAPS. 2006-03-13 01:15:01 +00:00
Daniel Eischen
cce72e8860 Add symbol maps and initial symbol version definitions to libc.
Reviewed by:	davidxu
2006-03-13 00:53:21 +00:00
Stefan Farfeleder
613100918d Include a couple of headers to ensure consistency between the prototype and
the function definition.
2005-09-12 19:52:42 +00:00
Stefan Farfeleder
442a7dde61 The header and the man page say that sethostid() returns void, so make the
definition match.  Include <unistd.h>.
2005-09-10 13:54:42 +00:00
Alexey Zelkin
fcd2f9fe54 Revert accidiental removal of string.h inclusion. 2005-02-27 18:39:02 +00:00
Alexey Zelkin
75667314a9 Replace usage of strerror()/strcpy() with strerror_r() here, reducing
number of required operations to get error message and avoiding of strerror's
buffer clobbering.

Also ANSI'fy prototypes while I'm here
2005-02-27 14:51:27 +00:00
Ruslan Ermilov
24a0682c64 Sort sections. 2005-01-20 09:17:07 +00:00
Ruslan Ermilov
1a0a934547 Mechanically kill hard sentence breaks. 2004-07-02 23:52:20 +00:00
Ruslan Ermilov
fe08efe680 mdoc(7): Use the new feature of the .In macro. 2003-09-08 19:57:22 +00:00
Garrett Wollman
4f85c6dd30 Explain the relationship to POSIX. 2003-06-20 22:41:00 +00:00
Philippe Charnier
d649825182 The .Fn function 2003-02-06 11:04:47 +00:00
Ruslan Ermilov
2efeeba554 mdoc(7) police: "The .Fa argument.". 2002-12-19 09:40:28 +00:00
Ruslan Ermilov
1fae73b137 mdoc(7) police: "The .Fn function". 2002-12-18 12:45:11 +00:00
Ruslan Ermilov
c51d717f0c libc_r wasn't so tied to libc for 22 months. 2002-11-18 09:50:57 +00:00
Alfred Perlstein
a82bbc730e Assume __STDC__, remove non-__STDC__ code.
Submitted by: keramida
2002-05-28 17:03:12 +00:00
David E. O'Brien
333fc21e3c Fix the style of the SCM ID's.
I believe have made all of libc .c's as consistent as possible.
2002-03-22 21:53:29 +00:00
Ruslan Ermilov
32eef9aeb1 mdoc(7) police: Use the new .In macro for #include statements. 2001-10-01 16:09:29 +00:00
Ruslan Ermilov
d6002fef6f Use ``.Rv -std'' wherever possible.
Submitted by:	yar
2001-08-31 09:57:38 +00:00
Ruslan Ermilov
8af1452cf8 Removed duplicate VCS ID tags, as per style(9). 2001-08-13 14:06:34 +00:00
Yaroslav Tykhiy
b1250632c5 Use the ``.Rv -std'' mdoc(7) macro in appropriate cases.
Reviewed by:	ru
2001-08-09 13:32:13 +00:00
Ruslan Ermilov
6575e6daae mdoc(7) police: expand plain text xrefs. 2001-08-08 11:48:28 +00:00
Dima Dorfman
7ebcc426ef Remove whitespace at EOL. 2001-07-15 07:53:42 +00:00
Ruslan Ermilov
a307d59838 mdoc(7) police: removed HISTORY info from the .Os call. 2001-07-10 13:41:46 +00:00
Ruslan Ermilov
4a558355e5 MAN[1-9] -> MAN. 2001-03-27 17:27:19 +00:00
Daniel Eischen
d201fe46e3 Remove _THREAD_SAFE and make libc thread-safe by default by
adding (weak definitions to) stubs for some of the pthread
functions.  If the threads library is linked in, the real
pthread functions will pulled in.

Use the following convention for system calls wrapped by the
threads library:
	__sys_foo - actual system call
	_foo - weak definition to __sys_foo
	foo - weak definition to __sys_foo

Change all libc uses of system calls wrapped by the threads
library from foo to _foo.  In order to define the prototypes
for _foo(), we introduce namespace.h and un-namespace.h
(suggested by bde).  All files that need to reference these
system calls, should include namespace.h before any standard
includes, then include un-namespace.h after the standard
includes and before any local includes.  <db.h> is an exception
and shouldn't be included in between namespace.h and
un-namespace.h  namespace.h will define foo to _foo, and
un-namespace.h will undefine foo.

Try to eliminate some of the recursive calls to MT-safe
functions in libc/stdio in preparation for adding a mutex
to FILE.  We have recursive mutexes, but would like to avoid
using them if possible.

Remove uneeded includes of <errno.h> from a few files.

Add $FreeBSD$ to a few files in order to pass commitprep.

Approved by:	-arch
2001-01-24 13:01:12 +00:00
Ben Smithurst
4f6964d072 Merge the documentation for sigsetmask() and sigblock() into a
single manual page, appropriately linked, since this removes the
decision of which page the (previously non-existent) sigmask.2
MLINK should point at.

Submitted by:	will
2001-01-17 19:20:58 +00:00
Ruslan Ermilov
4263595653 Prepare for mdoc(7)NG. 2000-12-29 14:08:20 +00:00
Ruslan Ermilov
c23155a43a mdoc(7) police: Er macro usage cleanup. 2000-11-22 16:02:00 +00:00
Ruslan Ermilov
251c176f41 mdoc(7) police: use certified section headers wherever possible. 2000-11-17 11:44:16 +00:00