| Commit message (Expand) | Author | Age | Files | Lines |
|---|
| * | Setup stub unit test infrastructure | EuAndreh | 2024-01-05 | 5 | -0/+40 |
| * | use kernel-provided AT_MINSIGSTKSZ for sysconf(_SC_[MIN]SIGSTKSZ)•••use the legacy constant values if the kernel does not provide
AT_MINSIGSTKSZ (__getauxval will return 0 in this case) and as a
safety check if something is wrong and the provided value is less than
the legacy constant.
sysconf(_SC_SIGSTKSZ) returns SIGSTKSZ adjusted for the difference
between the legacy constant MINSIGSTKSZ and the runtime value, so that
the working space the application has on top of the minimum remains
invariant under changes to the minimum.
| Rich Felker | 2022-08-26 | 1 | -2/+12 |
| * | add sysconf keys/values for signal stack size•••as a result of ISA extensions exploding register file sizes on some
archs, using a constant for minimum signal stack size no longer seems
viably future-proof. add sysconf keys allowing the kernel to provide a
machine-dependent minimum applications can query to ensure they
allocate sufficient space for stacks. the key names and indices align
with the same functionality in glibc.
see commit d5a5045382315e36588ca225889baa36ed0ed38f for previous
action on this subject.
ultimately, the macros MINSIGSTKSZ and SIGSTKSZ probably need to be
deprecated, but that is standards-amendment work outside the scope of
a single implementation.
| Rich Felker | 2022-08-26 | 1 | -0/+3 |
| * | add missing POSIX confstr keys for pthread CFLAGS/LDFLAGS•••_CS_POSIX_V7_THREADS_CFLAGS and _CS_POSIX_V7_THREADS_LDFLAGS have been
missing for a long time, which is a conformance defect. we were
waiting on glibc to add them or at least agree on the numeric values
they will have so as to keep the numbering aligned. it looks like they
will be added to glibc with these numbers, and in any case, this list
does not have any significant churn that would result in the numbers
getting taken.
| Rich Felker | 2022-04-20 | 1 | -1/+1 |
| * | fix build regression in sysconf for archs with variable page size•••commit 5ce3737931bb411a8d167356d4d0287b53b0cbdc removed the inclusion
of libc.h from this file as spurious, but it's needed to get PAGE_SIZE
on archs where PAGE_SIZE is not a constant defined by limits.h.
| Rich Felker | 2018-09-14 | 1 | -0/+1 |
| * | reduce spurious inclusion of libc.h•••libc.h was intended to be a header for access to global libc state and
related interfaces, but ended up included all over the place because
it was the way to get the weak_alias macro. most of the inclusions
removed here are places where weak_alias was needed. a few were
recently introduced for hidden. some go all the way back to when
libc.h defined CANCELPT_BEGIN and _END, and all (wrongly implemented)
cancellation points had to include it.
remaining spurious users are mostly callers of the LOCK/UNLOCK macros
and files that use the LFS64 macro to define the awful *64 aliases.
in a few places, new inclusion of libc.h is added because several
internal headers no longer implicitly include libc.h.
declarations for __lockfile and __unlockfile are moved from libc.h to
stdio_impl.h so that the latter does not need libc.h. putting them in
libc.h made no sense at all, since the macros in stdio_impl.h are
needed to use them correctly anyway.
| Rich Felker | 2018-09-12 | 1 | -1/+0 |
| * | overhaul internally-public declarations using wrapper headers•••commits leading up to this one have moved the vast majority of
libc-internal interface declarations to appropriate internal headers,
allowing them to be type-checked and setting the stage to limit their
visibility. the ones that have not yet been moved are mostly
namespace-protected aliases for standard/public interfaces, which
exist to facilitate implementing plain C functions in terms of POSIX
functionality, or C or POSIX functionality in terms of extensions that
are not standardized. some don't quite fit this description, but are
"internally public" interfacs between subsystems of libc.
rather than create a number of newly-named headers to declare these
functions, and having to add explicit include directives for them to
every source file where they're needed, I have introduced a method of
wrapping the corresponding public headers.
parallel to the public headers in $(srcdir)/include, we now have
wrappers in $(srcdir)/src/include that come earlier in the include
path order. they include the public header they're wrapping, then add
declarations for namespace-protected versions of the same interfaces
and any "internally public" interfaces for the subsystem they
correspond to.
along these lines, the wrapper for features.h is now responsible for
the definition of the hidden, weak, and weak_alias macros. this means
source files will no longer need to include any special headers to
access these features.
over time, it is my expectation that the scope of what is "internally
public" will expand, reducing the number of source files which need to
include *_impl.h and related headers down to those which are actually
implementing the corresponding subsystems, not just using them.
| Rich Felker | 2018-09-12 | 1 | -1/+0 |
| * | fix several values reported by sysconf•••- REALTIME_SIGNALS is supposed to be version-valued
- DELAYTIMER_MAX was wrongly using the min allowed max
- unavailable compilation environments wrongly used 0 instead of -1
| Rich Felker | 2018-08-28 | 1 | -8/+11 |
| * | remove erroneous SYMLINK_MAX definition from limits.h, pathconf•••POSIX requires the symlink function to fail with ENAMETOOLONG if the
link contents to be written exceed SYMLINK_MAX in length, but neither
Linux nor our syscall wrapper code enforce this. the value 255 for
SYMLINK_MAX is not meaningful and does not seem to have been motivated
by anything except perhaps a wrong assumption that a definition was
mandatory. it has been present (though moving through bits to
top-level limits.h) since the beginning of the project history.
[f]pathconf is entitled to return -1 as the limit for conf names for
which there is no hard limit, with the usual POSIX note that an
indefinite limit does not imply an infinite limit. in principle we
might should report a limit for filesystems that impose one, but such
functionality is not currently present for any of the pathconf limits,
and adding it is beyond the scope of fixing the incorrect limit.
| Rich Felker | 2018-08-20 | 1 | -1/+1 |
| * | fix sysconf for infinite rlimits•••sysconf should return -1 for infinity, not LONG_MAX.
| Natanael Copa | 2017-12-14 | 1 | -0/+2 |
| * | add missing confstr constants•••the _CS_V6_ENV and _CS_V7_ENV constants are required to be available for use
with confstr. glibc defines these constants with values 1148 and 1149,
respectively.
the only missing (and required) confstr constants are
_CS_POSIX_V7_THREADS_CFLAGS and _CS_POSIX_V7_THREADS_LDFLAGS which remain
unavailable in glibc.
| Daniel Sabogal | 2016-10-20 | 1 | -1/+1 |
| * | add legacy functions from sysinfo.h duplicating sysconf functionality | Rich Felker | 2015-03-04 | 1 | -0/+22 |
| * | fix off-by-one in bounds check in fpathconf•••this error resulted in an out-of-bounds read, as opposed to a reported
error, when calling the function with an argument one greater than the
max valid index.
| Rich Felker | 2014-09-05 | 1 | -1/+1 |
| * | remove unsupported nonstandard sysconf macros and their table entries•••some of these may have been from ancient (pre-SUSv2) POSIX versions;
more likely, they were from POSIX drafts or glibc interpretations of
what ancient versions of POSIX should have added (instead they made
they described functionality mandatory and/or dropped it completely).
others are purely glibc-isms, many of them ill-thought-out, like
providing ways to lookup the min/max values of types at runtime
(despite the impossibility of them changing at runtime and the
impossibility of representing ULONG_MAX in a return value of type
long).
since our sysconf implementation does not support or return meaningful
values for any of these, it's harmful to have the macros around;
applications' build scripts may detect and attempt to use them, only
to get -1/EINVAL as a result.
if removing them does break some applications, and it's determined
that the usage was reasonable, some of these could be added back on an
as-needed basis, but they should return actual meaningful values, not
junk like they were returning before.
| Rich Felker | 2014-05-19 | 1 | -60/+0 |
| * | rework sysconf table to treat zero entries as invalid•••based on patch by Timo Teräs. previously, the value zero was used as a
literal zero, meaning that all invalid sysconf "names", which should
result in sysconf returning -1, had to be explicitly listed. (in
addition, it was not possible for sysconf to set errno to EINVAL, as
there was no distinction between -1 as an error and -1 as a valid
result.)
now, the value 0 is used for invalid/undefined slots in the table and
a new switch table entry is used for returning literal zeros.
in addition, an off-by-one error in checking against the table size is
fixed.
| Rich Felker | 2014-05-19 | 1 | -10/+13 |
| * | add _SC_PHYS_PAGES and _SC_AVPHYS_PAGES extentions to sysconf | Rich Felker | 2014-04-15 | 1 | -2/+17 |
| * | in sysconf, use getrlimit function rather than raw syscall for rlimits•••the syscall is deprecated (replaced by prlimit64) and does not work
correctly on x32. this change mildly increases size, but is likely
needed anyway for newer archs that might omit deprecated syscalls.
| Rich Felker | 2014-04-15 | 1 | -3/+3 |
| * | avoid linear-time if/else special cases in sysconf•••the previous handling of cases that could not fit in the 16-bit table
or which required non-constant results was extremely ugly and could
not scale. the new code remaps these keys into a contiguous range
that's efficient for a switch statement.
| Rich Felker | 2014-04-15 | 1 | -20/+35 |
| * | fix confstr return value•••per the specification, the terminating null byte is counted.
| Timo Teräs | 2014-03-24 | 1 | -1/+1 |
| * | correct the sysconf value for RTSIG_MAX•••this is the number of realtime signals available, not the maximum
signal number or total number of signals.
| Rich Felker | 2013-09-20 | 1 | -1/+2 |
| * | support configurable page size on mips, powerpc and microblaze•••PAGE_SIZE was hardcoded to 4096, which is historically what most
systems use, but on several archs it is a kernel config parameter,
user space can only know it at execution time from the aux vector.
PAGE_SIZE and PAGESIZE are not defined on archs where page size is
a runtime parameter, applications should use sysconf(_SC_PAGE_SIZE)
to query it. Internally libc code defines PAGE_SIZE to libc.page_size,
which is set to aux[AT_PAGESZ] in __init_libc and early in __dynlink
as well. (Note that libc.page_size can be accessed without GOT, ie.
before relocations are done)
Some fpathconf settings are hardcoded to 4096, these should be actually
queried from the filesystem using statfs.
| Szabolcs Nagy | 2013-09-15 | 2 | -6/+9 |
| * | fix overflow in sysconf for _SC_MQ_PRIO_MAX•••the value of MQ_PRIO_MAX does not fit, so it needs to use OFLOW.
| Rich Felker | 2013-09-14 | 1 | -1/+2 |
| * | a few more fixes for unistd/sysconf feature reporting | Rich Felker | 2013-07-27 | 1 | -7/+7 |
| * | report presence of ADV and MSG options in unistd.h and sysconf | Rich Felker | 2013-07-26 | 1 | -2/+2 |
| * | report that posix_spawn is supported in unistd.h and sysconf | Rich Felker | 2013-07-26 | 1 | -1/+1 |
| * | document in sysconf and unistd.h that per-thread cpu clocks exist | Rich Felker | 2013-06-26 | 1 | -1/+1 |
| * | report support of TPS option in unistd.h and sysconf•••also update another newish feature in sysconf, stackaddr
| Rich Felker | 2012-11-11 | 1 | -2/+2 |
| * | let sysconf accurately report # of cpus available•••i've been trying out openmp and it seems like it won't be much use
without this...
| Rich Felker | 2012-05-13 | 1 | -2/+10 |
| * | fix broken sysconf when correct value is -1•••this caused glib to try to allocate >2gb for getpwnam_r, and probably
numerous other problems.
| Rich Felker | 2012-04-21 | 1 | -1/+1 |
| * | sysconf support for dynamic limits (open files and processes) | Rich Felker | 2012-03-22 | 1 | -2/+9 |
| * | sysconf for PTHREAD_KEYS_MAX | Rich Felker | 2011-10-03 | 1 | -1/+1 |
| * | in pathconf, -1, not 0, means unsupported.. syncio presumably works, too. | Rich Felker | 2011-08-16 | 1 | -3/+3 |
| * | fix bogus pathconf result for file size bits | Rich Felker | 2011-08-16 | 1 | -1/+1 |
| * | define MQ_PRIO_MAX | Rich Felker | 2011-06-07 | 1 | -1/+1 |
| * | better fix sysconf pthread stack min | Rich Felker | 2011-04-08 | 1 | -1/+1 |
| * | consistency with pthread stack min in limits.h | Rich Felker | 2011-04-08 | 1 | -1/+1 |
| * | fix sem_open and sem_close to obey posix semantics•••multiple opens of the same named semaphore must return the same
pointer, and only the last close can unmap it. thus the ugly global
state keeping track of mappings. the maximum number of distinct named
semaphores that can be opened is limited sufficiently small that the
linear searches take trivial time, especially compared to the syscall
overhead of these functions.
| Rich Felker | 2011-03-10 | 1 | -5/+5 |
| * | put confstr.c with the other conf functions | Rich Felker | 2011-02-14 | 1 | -0/+17 |
| * | initial check-in, version 0.5.0 | Rich Felker | 2011-02-12 | 3 | -0/+263 |
