This PR adds declarations for the application conformance
feature test macro _POSIX_C_SOURCE.
It needs to be defined to value greater than or equal to 200112L
by the appplication.
However, Zephyr currently does not have a simple and consistent
means of specifying this value for POSIX samples, tests,
applications, and other libraries.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
This service is used to get, set, and unset system
environment variables.
Note: shell parameter expansion is not supported
at this time.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
Added a top level `posix` shell command for other POSIX
commands. Currently only `uname` is supported.
New POSIX commands can be added by including the
`posix_shell.h` header and use the `POSIX_CMD_ADD` helper
macro.
Signed-off-by: Yong Cong Sin <ycsin@meta.com>
Relocate the `uname` shell implementation from uname sample, so
that it can be reused by other application and the uname sample
only uses POSIX APIs.
Signed-off-by: Yong Cong Sin <ycsin@meta.com>
