Hi,
The dictionary
OSPlatform current environment
contains a copy of the OS's environment variables (more correctly of the VM
process), as key/value pairs.
These are obtained via the following system calls:
on macOS & *nix
LIBC environ
on Windows
KERNEL32 GetEnvironmentStrings
It is however a bit unclear how these are encoded. On macOS & *nix that seems
to be UTF8, on Windows there are some reports that it appears to be Latin1 -
but both might be locale specific, I don't know either way.
Does anyone know for sure ?
I furthermore think that OSEnvironment and its subclasses, who do this call,
should be responsible for decoding the C strings into proper Pharo strings, and
not leave that responsibility to its users.
Fundamentally, in the following, the decoding is still not done correctly and
that is wrong/confusing IMHO.
$ FOO=benoît ./pharo Pharo.image eval 'OSEnvironment current associations'
{'TERM_PROGRAM'->'Apple_Terminal'. 'TERM'->'xterm-256color'.
'SHELL'->'/bin/bash'.
'TMPDIR'->'/var/folders/sy/sndrtj9j1tq06j0lfnshmrl80000gn/T/'.
'FOO'->'benoît'.
'Apple_PubSub_Socket_Render'->'/private/tmp/com.apple.launchd.uWk7pivcLT/Render'.
'TERM_PROGRAM_VERSION'->'404'.
'TERM_SESSION_ID'->'845BECCD-0AB0-4686-B7F9-3A0FF84BDCB7'. 'USER'->'sven'.
'SSH_AUTH_SOCK'->'/private/tmp/com.apple.launchd.y5oCwdUyaG/Listeners'.
'PATH'->'/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/texbin:/opt/X11/bin'.
'PWD'->'/tmp/benoiÌt'. 'XPC_FLAGS'->'0x0'. 'XPC_SERVICE_NAME'->'0'.
'HOME'->'/Users/sven'. 'SHLVL'->'2'. 'LOGNAME'->'sven'. 'LC_CTYPE'->'UTF-8'.
'DISPLAY'->'/private/tmp/com.apple.launchd.lsgASYFiWW/org.macosforge.xquartz:0'.
'SECURITYSESSIONID'->'186a9'. 'OLDPWD'->'/tmp/benoiÌt'.
'_'->'/tmp/benoiÌt/pharo-vm/Pharo.app/Contents/MacOS/Pharo'.
'__CF_USER_TEXT_ENCODING'->'0x1F5:0x0:0x0'}
Of course, if we change this, we will need to fix callers.
Opinions ?
Sven
PS: Furthermore, I note that there is a subtle difference in how $FOO and $PWD
in the above are UTF-8 encoded. In the former, normalisation was done, in the
latter not. Maybe that could lead to problems (when comparing/composing them).
This is a difficult/complex subject
(https://medium.com/concerning-pharo/an-implementation-of-unicode-normalization-7c6719068f43).
