The functions fnmatch(), getopt(), getentropy()
and others are grouped into the standard Option Group
POSIX_C_LIB_EXT.
The getentropy() function is currently in-draft for
Issue 8 as of 2021.
https://www.opengroup.org/austin/docs/austin_1110.pdf
Not surprisingly, the POSIX_C_LIB_EXT Option Group
also includes the highly debated strnlen() function.
Moving that function will be deferred until later.
Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>
This change deprecates CONFIG_PTHREAD_RWLOCK in favour of
CONFIG_POSIX_READER_WRITER_LOCKS, which maps directly to the
name of the standard POSIX Option.
Annoyingly, the POSIX_RW_LOCKS Option Group is inconsistently
named. However, it is more convenient for us to use the Option
name since it is also the format used by the sysconf() variable
(_SC_READER_WRITER_LOCKS).
Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>
This change deprecates CONFIG_POSIX_MQUEUE in favour of
CONFIG_POSIX_MESSAGE_PASSING, which maps directly to the name of the
standard POSIX Option.
Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>
This change deprecates CONFIG_PTHREAD_SPINLOCK in favour of
CONFIG_POSIX_SPIN_LOCKS, which maps directly to the name of the
standard POSIX Option Group.
Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>
This change deprecates the following Kconfig options
* CONFIG_POSIX_ENV
* CONFIG_POSIX_CONFSTR
* CONFIG_POSIX_SYSCONF
* CONFIG_POSIX_UNAME
and instead groups them into a single Kconfig option that maps
directly to the standard. Namely, CONFIG_POSIX_SINGLE_PROCESS.
Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>
The standard specifies _POSIX_BARRIERS as an Option so let's
use CONFIG_POSIX_BARRIERS for consistence.
This change deprecates CONFIG_PTHREAD_BARRIER. Users should
instead choose CONFIG_POSIX_BARRIERS.
Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>
The POSIX_MAX_FDS option does not correspond to any standard
POSIX option. It was used to define the size of the file
descriptor table, which is by no means exclusively used by
POSIX (also net, fs, ...).
POSIX_MAX_FDS is being deprecated in order to ensure that
Zephyr's POSIX Kconfig variables correspond to those defined in
the specification, as of IEEE 1003.1-2017. Namely,
POSIX_OPEN_MAX. CONFIG_POSIX_MAX_OPEN_FILES is being deprecated
for the same reason.
To mitigate any possible layering violations, that option is
not user selectable. It tracks the newly added
CONFIG_ZVFS_OPEN_MAX option, which is native to Zephyr.
With this deprecation, we introduce the following Kconfig
options that map directly to standard POSIX Option Groups by
simply removing "CONFIG_":
* CONFIG_POSIX_DEVICE_IO
Similarly, with this deprecation, we introduce the following
Kconfig options that map directly to standard POSIX Options by
simply removing "CONFIG":
* CONFIG_POSIX_OPEN_MAX
In order to maintain parity with the current feature set, we
introduce the following Kconfig options.
* CONFIG_POSIX_DEVICE_IO_ALIAS_CLOSE
* CONFIG_POSIX_DEVICE_IO_ALIAS_OPEN
* CONFIG_POSIX_DEVICE_IO_ALIAS_READ
* CONFIG_POSIX_DEVICE_IO_ALIAS_WRITE
Gate open(), close(), read(), and write() via the
CONFIG_POSIX_DEVICE_IO Kconfig option and move
implementations into device_io.c, to be conformant with the
spec.
Lastly, stage function names for upcoming ZVFS work, to be
completed as part of the LTSv3 Roadmap (e.g. zvfs_open(), ..).
Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>
With this change, we collect implementations of functions that are
part of the POSIX_FD_MGMT Option Group into one compilation unit
(fd_mgmt.c) and provide a matching Kconfig symbol that is
reflective of the standard.
Additionally, provide Kconfig options for aliases of those functions
since Newlib-based toolchains internally use an underscore-prefixed
alias for many POSIX functions (in this case _lseek).
Prefix Zephyr-native implementations with zvfs_ to prepare for the
up-coming changes in that area.
Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>
The POSIX_CLOCK option does not correspond to any standard
option. It was used to active features of several distinct
POSIX Options and Option Groups, which complicated API and
application configuration as a result.
POSIX_CLOCK is being deprecated in order to ensure that Zephyr's
POSIX Kconfig variables correspond to those defined in the
specification, as of IEEE 1003.1-2017.
Additionally, CONFIG_TIMER is being deprecated because it does
not match the corresponding POSIX Option (_POSIX_TIMERS).
With this deprecation, we introduce the following Kconfig
options that map directly to standard POSIX Option Groups by
simply removing "CONFIG_":
* CONFIG_POSIX_TIMERS
Similarly, we introduce the following Kconfig options that
map directly to standard POSIX Options by simply removing
"CONFIG":
* CONFIG_POSIX_CLOCK_SELECTION
* CONFIG_POSIX_CPUTIME
* CONFIG_POSIX_DELAYTIMER_MAX
* CONFIG_POSIX_MONOTONIC_CLOCK
* CONFIG_POSIX_TIMEOUTS
* CONFIG_POSIX_TIMER_MAX
In order to maintain parity with the current feature set, we
introduce the following Kconfig options that map directly to
standard POSIX Option Groups by simply removing "CONFIG_":
* CONFIG_POSIX_MULTI_PROCESS - sleep()
Similarly, in order to maintain parity with the current feature
set, we introduce the following additional Kconfig options that
map directly to standard POSIX Options by simply removing
"CONFIG":
* CONFIG_XSI_SINGLE_PROCESS - gettimeofday()
Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>
There were two Kconfig constants defined for (effectively) the
same thing in Zephyr. Namely, RTSIG_MAX - the highest valued
real-time signal.
Deprecate CONFIG_POSIX_LIMITS_RTSIG_MAX in favour of
CONFIG_POSIX_RTSIG_MAX since the latter more closely matches
convention.
Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>
There will be some POSIX Kconfig symbols that will be deprecated
in favour of Kconfig symbols that are exact matches for those in
the POSIX specification (1003.1-2017).
Create the empty Kconfig file now, and then incrementally add to
it as non-standard POSIX Kconfig options are replaced with
standard-like POSIX Kconfig options.
Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>
It's sort of more conventient to do the opposite of what was
done with the __z_sysconf_ macros, and use them for both the
full implementation and the macro implementation.
Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>
Namespaced the generated headers with `zephyr` to prevent
potential conflict with other headers.
Introduce a temporary Kconfig `LEGACY_GENERATED_INCLUDE_PATH`
that is enabled by default. This allows the developers to
continue the use of the old include paths for the time being
until it is deprecated and eventually removed. The Kconfig will
generate a build-time warning message, similar to the
`CONFIG_TIMER_RANDOM_GENERATOR`.
Updated the includes path of in-tree sources accordingly.
Most of the changes here are scripted, check the PR for more
info.
Signed-off-by: Yong Cong Sin <ycsin@meta.com>
Call `getopt_init()` to reset `state->optind` instead of directly setting
`optind = 1`. The `getopt()` function uses `getopt_state` from
`getopt_state_get` for state handling, so `getopt_init()` should be called
to correctly run the command again.
Signed-off-by: Pisit Sawangvonganan <pisit@ndrsolution.com>
Fix 2 build warnings in posix/options/env:
The maximum length given to strncpy() matches the input
string length, which makes the call equivalent to strcpy().
As the destination buffer size has been ensured sufficient
(in the first case by chechking just before,
in the second case by allocating it big enough),
let's just use strcpy() instead.
lib/posix/options/env.c: In function 'getenv_r':
lib/posix/options/env.c:109:17: error: 'strncpy' specified bound
depends on the length of the source argument
[-Werror=stringop-truncation]
109 | strncpy(buf, val, vsize);
| ^~~~~~~~~~~~~~~~~~~~~~~~
lib/posix/options/env.c:104:25: note: length computed here
104 | vsize = strlen(val) + 1;
| ^~~~~~~~~~~
lib/posix/options/env.c: In function 'setenv':
lib/posix/options/env.c:191:17: error: 'strncpy' output truncated
before terminating nul copying as many bytes from a string as its
length [-Werror=stringop-truncation]
191 | strncpy(environ[ret], name, nsize);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
lib/posix/options/env.c:128:51: note: length computed here
128 | const size_t nsize = (name == NULL) ? 0 : strlen(name);
| ^~~~~~~~~~~~
Signed-off-by: Alberto Escolar Piedras <alberto.escolar.piedras@nordicsemi.no>
The function writes random data to the provided buffer. Maximum
permitted buffer size is 256 bytes. On success the function returns 0,
otherwise it returns -1 and sets errno to appropriate value.
Signed-off-by: Patryk Duda <patrykd@google.com>
Add stubs for POSIX asynchronous io that return -1 and set
errno to ENOTSUP.
The functions and structures in aio.h are required by the
_POSIX_ASYNCHRONOUS_IO Option as detailed in Section E.1 of
IEEE-1003.1-2017.
The _POSIX_ASYNCHRONOUS_IO interface is required for PSE51,
PSE52, PSE53, and PSE54 conformance, and is otherwise mandatory
for any POSIX conforming system as per Section A.2.1.3 of
IEEE-1003-1.2017.
Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>
Let's introduce a new option so components which cannot
be used with the native libC can select it.
And at this point let's already have POSIX_API select it
instead of being used in the libC choice default.
Signed-off-by: Alberto Escolar Piedras <alberto.escolar.piedras@nordicsemi.no>
Based on Andy's talk at eoss 2024, use the sys/sem.h api instead
of the spinlock.h api to synchronize pooled elements since it
has minimal overhead like semaphores but also works from
userspace.
Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>
ftruncate should return -1 on errors and it needs to
set appropriate error values in errno
Signed-off-by: Karthikeyan Krishnasamy <karthikeyan@linumiz.com>
Commit e6eb0a705b ("posix: eventfd: revise locking, signaling, and
allocation") introduced a regression where the internal flags of an
event file descriptor would be erased when calling the F_SETFL ioctl
operation.
This includes the flag EFD_IN_USE_INTERNAL which determines whether
this file descriptor has been opened, thus effectively closing the
eventfd whenever one tries to change a flag.
Signed-off-by: Celina Sophie Kalus <hello@celinakalus.de>
The `BUILD_VERSION` can be defined but empty when built
without git, causing version to be missing from the uname
version string:
```
*** Booting Zephyr OS build 3.5.0 ***
Printing everything in utsname...
sysname[7]: Zephyr
nodename[7]: zephyr
release[13]: 3.5.0
version[61]: Apr 1 2024 23:48:30
machine[8]: riscv64
uart:~$
```
Let's check if it is empty before using it, so that
`KERNEL_VERSION_STRING`, which is generated independently
with cmake can be used as a fallback:
```
*** Booting Zephyr OS build 3.5.0 ***
Printing everything in utsname...
sysname[7]: Zephyr
nodename[7]: zephyr
release[13]: 3.5.0
version[61]: 3.5.0 Apr 1 2024 23:53:48
machine[8]: riscv64
uart:~$
```
Signed-off-by: Yong Cong Sin <ycsin@meta.com>
With CONFIG_NET_POSIX_NAMES being deprecated, convert static
inlines in headers to prototypes, and move implementations
to lib/posix/options/net.c .
Since select and poll should technically also operate on
non-socket file descriptors, these may be relocated in the
future.
Below are some reasons for this change.
1. So posix calls are regular symbols and not directly inlined
as syscalls. This is also the most portable linkage type.
2. Many posix calls are cancellation points and additional
checks are necessary within the implementation.
3. The more we add to an inline call, the less sense it makes
for that call to be inline.
4. When the implementation of a posix function changes, the
interface for it should still remain consistent.
Note: the same principles have been applied in Zephyr's
posix implementation already, e.g. clock_gettime(), so this
is nothing new.
Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>
Implement `pthread_attr_setinheritsched()` and
`pthread_attr_getinheritsched()`are required
as part of _POSIX_THREAD_PRIORITY_SCHEDULING Option Group.
signed-off-by: Gaetan Perrot <gaetanperrotpro@gmail.com>
Implement if_indextoname(), if_freenameindex(), if_nameindex(),
and if_nametoindex() by wrapping around networking subystem
calls.
Signed-off-by: Chris Friedt <chrisfriedt@gmail.com>
Implement pthread_rwlockattr_setpshared() and
pthread_rwlockattr_getpshared().
Both functions are required by the _POSIX_READER_WRITER_LOCKS
Option as detailed in Section E.1 of IEEE-1003.1-2017.
The _POSIX_READER_WRITER_LOCKS Option is required for PSE51,
PSE52, PSE53, and PSE54 conformance, and is otherwise mandatory
for any POSIX conforming system as per Section A.2.1.3 of
IEEE-1003-1.2017.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
Move the implementation of the following functions into
the posix library rather than having themn as static
inline functions.
* pthread_rwlockattr_init()
* pthread_rwlockattr_destroy()
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
clock_getres() is required by the POSIX_TIMERS Option Group
as detailed in Section E.1 of IEEE-1003.1-2017.
The POSIX_TIMERS Option Group is required for PSE51, PSE52,
PSE53, and PSE54 conformance, and is otherwise mandatory for
any POSIX conforming system as per Section A.2.1.3 of
IEEE-1003-1.2017.
With this, we have complete support for the POSIX_TIMERS
Option Group.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
Support querying POSIX string configuration values (similar to
sysconf()).
confstr() is required by the POSIX_SINGLE_PROCESS Option
Group as detailed in Section E.1 of IEEE-1003.1-2017 and has
been part of the specification since POSIX-2.
The POSIX_SINGLE_PROCESS Option Group is required for PSE51,
PSE52, PSE53, and PSE54 conformance, and is otherwise mandatory
for any POSIX conforming system as per Section A.2.1.3 of
IEEE-1003-1.2017.
With this, we have complete support for the POSIX_SINGLE_PROCESS
Option Group.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
Implement `pthread_attr_setscope()` and `pthread_attr_getscope()`
are required as part of _POSIX_THREAD_PRIORITY_SCHEDULING Option Group.
signed-off-by: Gaetan Perrot <gaetanperrotpro@gmail.com>
Previously, sysconf() was only available as a macro (i.e. the
"extra-small" option).
This has the advantage of being compile-time constant, and
optimized for both space and speed. One disadvantage is that
querying an `_SC_` value that was invalid or unsupported
would result in a compile error.
Provide a "small" implementation of sysconf() (via Kconfig
choice) as a normal addressable function.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
Seen this in compiler
lib/posix/options/syslog.c: In function 'setlogmask':
lib/posix/options/syslog.c:66:16: error: 'oldpri' may be used uninitialized
66 | return oldpri;
| ^~~~~~
lib/posix/options/syslog.c:59:13: note: 'oldpri' was declared here
59 | int oldpri;
| ^~~~~~
lib/posix/options/syslog.c: In function 'vsyslog':
lib/posix/options/syslog.c:83:33: error: 'mask' may be used uninitialized
83 | if ((BIT(level) & mask) == 0) {
| ~~~~~~~~~~~~~~~~~~~~^~~~
lib/posix/options/syslog.c:71:17: note: 'mask' was declared here
71 | uint8_t mask;
| ^~~~
Signed-off-by: Jukka Rissanen <jukka.rissanen@nordicsemi.no>
Support getting and setting POSIX environment variables.
Additionally, the thread-safe BSD variant getenv_r() is
provided.
environ, getenv(), setenv(), and unsetenv() are required by
the POSIX_SINGLE_PROCESS Option Group as detailed in
Section E.1 of IEEE-1003.1-2017.
The POSIX_SINGLE_PROCESS Option Group is required for PSE51,
PSE52, PSE53, and PSE54 conformance, and is otherwise mandatory
for any POSIX conforming system as per Section A.2.1.3 of
IEEE-1003-1.2017.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
This is just a simple wrapper around Zephyr's native log api.
Note: the standard LOG_ERR syslog priority does conflict with
Zephyr's LOG_ERR() macro. This will need to be worked-around on
a case-by-case basis.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
Previously, pthread_mutexattr_gettype() and
pthread_mutexattr_settype() were non-conformant and also
less safe, as they would not check whether a pthread_mutexattr_t
had been initialized prior to manipulating them. Furthermore,
they would potentially dereference NULL pointers.
Additionally, move the pthread_mutexattr_init() and
pthread_mutexattr_destroy() functions to the library, and add
some level of checking to them so that they are more than simply
static inline / no-op calls.
Lastly, reduce the size of struct pthread_mutexattr to only
what is necessary (one byte should suffice).
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
pthread_exit() does not return and therefore it does not make
sense to return NULL after it in mq_notify_thread(), and that
would constitute dead code.
Rather than explicitly exiting the thread, simply return
gracefully from the thread function, and allow the pthread to
terminate in the usual way.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
In Zephyr, things are often optimized for size first. That's how
we fit into such tight parking spaces.
This change gives more control to the user about whether the
POSIX API does any logging at all, simultaneously shrinking binary
size while improving speed.
No bytes / cycles left behind!
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
