Commit Graph

40 Commits

Author SHA1 Message Date
Rich Felker ab8f6a6e42 fix places where _BSD_SOURCE failed to yield a superset of _XOPEN_SOURCE
the vast majority of these failures seem to have been oversights at
the time _BSD_SOURCE was added, or perhaps shortly afterward. the one
which may have had some reason behind it is omission of setpgrp from
the _BSD_SOURCE feature profile, since the standard setpgrp interface
conflicts with a legacy (pre-POSIX) BSD interface by the same name.
however, such omission is not aligned with our general policy in this
area (for example, handling of similar _GNU_SOURCE cases) and should
not be preserved.
2014-09-10 12:27:33 -04:00
Rich Felker 44d28e5512 overhaul siginfo_t definition in signal.h
the main motivation for this change is that, with the previous
definition, it was arguably illegal, in standard C, to initialize both
si_value and si_pid/si_uid with designated initializers, due to the
rule that only one member of a union can have an initializer. whether
or not this affected real-world application code, it affected some
internal code, and clang was producing warnings (and possibly
generating incorrect code).

the new definition uses a more complex hierarchy of structs and unions
to avoid the need to initialize more than one member of a single union
in usage cases that make sense. further work would be needed to
eliminate even the ones with no practical applications.

at the same time, some fixes are made to the exposed names for
nonstandard fields, to match what software using them expects.
2014-05-24 20:39:46 -04:00
Rich Felker 9505bfbc40 fix signal.h breakage from moving stack_t to arch-specific bits
in the previous changes, I missed the fact that both the prototype of
the sigaltstack function and the definition of ucontext_t depend on
stack_t.
2014-03-18 23:27:45 -04:00
Rich Felker bd5f221eaa move signal.h definition of stack_t to arch-specific bits
it's different at least on mips. mips version will be fixed in a
separate commit to show the change.
2014-03-18 23:12:40 -04:00
Rich Felker 3500555db3 fix const-correctness in sigandset/sigorset arguments
this change is consistent with the corresponding glibc functions and
is semantically const-correct. the incorrect argument types without
const seem to have been taken from erroneous man pages.
2014-01-07 02:50:34 -05:00
Rich Felker 8f0359605a fix multiple minor namespace issues in headers
fcntl.h: AT_* is not a reserved namespace so extensions cannot be
exposed by default.

langinfo.h: YESSTR and NOSTR were removed from the standard.

limits.h: NL_NMAX was removed from the standard.

signal.h: the conditional for NSIG was wrongly checking _XOPEN_SOURCE
rather than _BSD_SOURCE. this was purely a mistake; it doesn't even
match the commit message from the commit that added it.
2013-10-20 22:01:51 -04:00
Rich Felker a926fe26c1 fix incorrect type for new si_call_addr in siginfo_t
apparently the original kernel commit's i386 version of siginfo.h
defined this field as unsigned int, but the asm-generic file always
had void *. unsigned int is obviously not a suitable type for an
address, in a non-arch-specific file, and glibc also has void * here,
so I think void * is the right type for it.

also fix redundant type specifiers.
2013-07-24 23:17:21 -04:00
Szabolcs Nagy b54f169bfd update siginfo according to linux headers
linux commit a0727e8ce513fe6890416da960181ceb10fbfae6 (2012-04-12)
added siginfo fields for SIGSYS (seccomp uses it)

linux commit ad5fa913991e9e0f122b021e882b0d50051fbdbc (2009-09-16)
added siginfo field and si_code values for SIGBUS (hwpoison signal)
2013-07-24 23:56:13 +00:00
Rich Felker 9448b0513e refactor headers, especially alltypes.h, and improve C++ ABI compat
the arch-specific bits/alltypes.h.sh has been replaced with a generic
alltypes.h.in and minimal arch-specific bits/alltypes.h.in.

this commit is intended to have no functional changes except:
- exposing additional symbols that POSIX allows but does not require
- changing the C++ name mangling for some types
- fixing the signedness of blksize_t on powerpc (POSIX requires signed)
- fixing the limit macros for sig_atomic_t on x86_64
- making dev_t an unsigned type (ABI matching goal, and more logical)

in addition, some types that were wrongly defined with long on 32-bit
archs were changed to int, and vice versa; this change is
non-functional except for the possibility of making pointer types
mismatch, and only affects programs that were using them incorrectly,
and only at build-time, not runtime.

the following changes were made in the interest of moving
non-arch-specific types out of the alltypes system and into the
headers they're associated with, and also will tend to improve
application compatibility:
- netdb.h now includes netinet/in.h (for socklen_t and uint32_t)
- netinet/in.h now includes sys/socket.h and inttypes.h
- sys/resource.h now includes sys/time.h (for struct timeval)
- sys/wait.h now includes signal.h (for siginfo_t)
- langinfo.h now includes nl_types.h (for nl_item)

for the types in stdint.h:
- types which are of no interest to other headers were moved out of
  the alltypes system.
- fast types for 8- and 64-bit are hard-coded (at least for now); only
  the 16- and 32-bit ones have reason to vary by arch.

and the following types have been changed for C++ ABI purposes;
- mbstate_t now has a struct tag, __mbstate_t
- FILE's struct tag has been changed to _IO_FILE
- DIR's struct tag has been changed to __dirstream
- locale_t's struct tag has been changed to __locale_struct
- pthread_t is defined as unsigned long in C++ mode only
- fpos_t now has a struct tag, _G_fpos64_t
- fsid_t's struct tag has been changed to __fsid_t
- idtype_t has been made an enum type (also required by POSIX)
- nl_catd has been changed from long to void *
- siginfo_t's struct tag has been removed
- sigset_t's has been given a struct tag, __sigset_t
- stack_t has been given a struct tag, sigaltstack
- suseconds_t has been changed to long on 32-bit archs
- [u]intptr_t have been changed from long to int rank on 32-bit archs
- dev_t has been made unsigned

summary of tests that have been performed against these changes:
- nsz's libc-test (diff -u before and after)
- C++ ABI check symbol dump (diff -u before, after, glibc)
- grepped for __NEED, made sure types needed are still in alltypes
- built gcc 3.4.6
2013-07-22 11:22:36 -04:00
Rich Felker 8c741783fc fix some obscure header type size/alignment issues 2013-03-04 17:05:45 -05:00
rofl0r a1990e1e83 add sigandset and sigorset (needed for qemu) 2012-12-06 20:51:32 +01:00
Rich Felker 769fd4ce20 feature test macros: make _GNU_SOURCE enable everything
previously, a few BSD features were enabled only by _BSD_SOURCE, not
by _GNU_SOURCE. since _BSD_SOURCE is default in the absence of other
feature test macros, this made adding _GNU_SOURCE to a project not a
purely additive feature test macro; it actually caused some features
to be suppressed.

most of the changes made by this patch actually bring musl in closer
alignment with the glibc behavior for _GNU_SOURCE. the only exceptions
are the added visibility of functions like strlcpy which were BSD-only
due to being disliked/rejected by glibc maintainers. here, I feel the
consistency of having _GNU_SOURCE mean "everything", and especially
the property of it being purely additive, are more valuable than
hiding functions which glibc does not have.
2012-12-03 16:57:01 -05:00
Rich Felker 7dcb640da3 provide NSIG under _BSD_SOURCE (default) as well as _GNU_SOURCE
this fixes a regression related to the changes made to bits/signal.h
between 0.9.7 and 0.9.8 that broke some (non-portable) software.
2012-11-30 21:00:18 -05:00
Rich Felker a8da6c2f28 fixup mcontext stuff to expost gregset_t/fpregset_t as appropriate 2012-11-25 23:04:23 -05:00
Rich Felker 65b98213e4 add back NSIG, removed from powerpc in last commit, but for all archs
unlike the previous definition, NSIG/_NSIG is supposed to be one more
than the highest signal number. adding this will allow simplifying
libc-internal code that makes signal-related syscalls, which can be
done as a later step. some apps might use it too; while this usage is
questionable, it's at least not insane.
2012-11-21 13:41:58 -05:00
Rich Felker c1a9658bd1 default features: make musl usable without feature test macros
the old behavior of exposing nothing except plain ISO C can be
obtained by defining __STRICT_ANSI__ or using a compiler option (such
as -std=c99) that predefines it. the new default featureset is POSIX
with XSI plus _BSD_SOURCE. any explicit feature test macros will
inhibit the default.

installation docs have also been updated to reflect this change.
2012-09-07 23:13:55 -04:00
Rich Felker 400c5e5c83 use restrict everywhere it's required by c99 and/or posix 2008
to deal with the fact that the public headers may be used with pre-c99
compilers, __restrict is used in place of restrict, and defined
appropriately for any supported compiler. we also avoid the form
[restrict] since older versions of gcc rejected it due to a bug in the
original c99 standard, and instead use the form *restrict.
2012-09-06 22:44:55 -04:00
Rich Felker 90e123f4a8 fix redef of sigprocmask constants on mips
this fix is easier than trying to reorder the header stuff
2012-07-12 16:54:43 -04:00
Rich Felker ba8a96b068 more mips bits-header fixes
signal handling was very broken because of this
2012-07-12 14:21:41 -04:00
Rich Felker 9f370fa99e bsd_signal is a legacy (removed) XSI function, not needed in _BSD_SOURCE
its only purpose was for use on non-BSD systems that implement sysv
semantics for signal() by default.
2012-05-22 21:54:19 -04:00
Rich Felker 419ae6d5c9 support _BSD_SOURCE feature test macro
patch by Isaac Dunham. matched closely (maybe not exact) to glibc's
idea of what _BSD_SOURCE should make visible.
2012-05-22 21:52:08 -04:00
Rich Felker 0115a6ed96 rename __sa_restorer to sa_restorer in struct sigaction
this is legal since sa_* is in the reserved namespace for signal.h,
per posix. note that the sa_restorer field is not used anywhere, so
programs that are trying to use it may still break, but at least
they'll compile. if it turns out such programs actually need to be
able to set their own sa_restorer to function properly, i'll add the
necessary code to sigaction.c later.
2012-04-13 23:06:54 -04:00
Rich Felker 8eb9a3afba fix typo in FPE_FLTUND definition, signal.h 2012-01-25 15:30:42 -05:00
Rich Felker 81a5577a86 fix missing SIG_DFL, SIG_IGN, SIG_ERR without posix in signal.h 2011-09-21 22:25:31 -04:00
Rich Felker 03a8362930 fix broken siginfo_t with _GNU_SOURCE defined
this bug was introduced in a recent patch. the problem we're working
around is that broken GNU software wants to use "struct siginfo"
rather than "siginfo_t", but "siginfo" is not in the reserved
namespace and thus not legal for the standard header to use.
2011-09-20 10:58:18 -04:00
Rich Felker 8c07f6eac8 add some more siginfo aliases broken software expects... 2011-09-19 22:27:02 -04:00
Rich Felker f780ac5baf cleanup redundancy in bits/signal.h versions 2011-09-19 20:02:12 -04:00
Rich Felker fb80e047cc implement gnu sigisemptyset 2011-09-12 00:00:30 -04:00
Rich Felker adb7093caa fix missing prototypes/wrong signature for psiginfo, psignal 2011-09-02 14:25:43 -04:00
Rich Felker 7f5471529c fix some struct padding to match LSB/glibc ABI where it may be helpful 2011-06-16 17:11:35 -04:00
Rich Felker 202911435b add SA_NOMASK alias for SA_NODEFER with _GNU_SOURCE 2011-05-05 17:44:06 -04:00
Rich Felker 0f5b43550c fix incorrect GNU sighandler_t typedef 2011-04-13 08:45:28 -04:00
Rich Felker 80c4dcd253 implement POSIX timers
this implementation is superior to the glibc/nptl implementation, in
that it gives true realtime behavior. there is no risk of timer
expiration events being lost due to failed thread creation or failed
malloc, because the thread is created as time creation time, and
reused until the timer is deleted.
2011-03-29 13:01:25 -04:00
Rich Felker 855df698c4 move the GNU siginfo renaming so it doesn't lead to mismatching names 2011-02-20 01:48:51 -05:00
Rich Felker 417dbe92cb some gnu software wrongly uses "struct siginfo" instead of siginfo_t... 2011-02-16 22:37:26 -05:00
Rich Felker 3eb9feaa88 fix broken signal.h from header cleanup 2011-02-15 15:10:00 -05:00
Rich Felker 44460c6d1e fix some type leakage (timer_t) from x86_64 commit 2011-02-15 14:32:46 -05:00
Nicholas J. Kain 1e12632591 Port musl to x86-64. One giant commit! 2011-02-15 07:32:09 -05:00
Rich Felker 1322cb82a3 header cleanup, conformance fixes - signals 2011-02-14 20:33:54 -05:00
Rich Felker 0b44a0315b initial check-in, version 0.5.0 2011-02-12 00:22:29 -05:00