forked from nim-lang/Nim
-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Remove tracking of environment from osenv.nim v2 (nim-lang#18575)
* Remove unnecessary environment tracking * try to fix windows * fix delEnv * make putEnv work on windows even with empty values; improve tests: add tests, add js, vm testing * [skip ci] fix changelog Co-authored-by: Caden Haustein <[email protected]>
- Loading branch information
Showing
6 changed files
with
240 additions
and
186 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,92 @@ | ||
| #[ | ||
| Copyright (c) Facebook, Inc. and its affiliates. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| Adapted `setenv` from https://github.com/facebook/folly/blob/master/folly/portability/Stdlib.cpp | ||
| translated from C to nim. | ||
| ]# | ||
|
|
||
| #[ | ||
| Introduced in https://github.com/facebook/folly/commit/5d8ca09a3f96afefb44e35808f03651a096ab9c7 | ||
| TODO: | ||
| check errno_t vs cint | ||
| ]# | ||
|
|
||
| when not defined(windows): discard | ||
| else: | ||
| proc setEnvironmentVariableA*(lpName, lpValue: cstring): int32 {. | ||
| stdcall, dynlib: "kernel32", importc: "SetEnvironmentVariableA", sideEffect.} | ||
| # same as winlean.setEnvironmentVariableA | ||
|
|
||
| proc c_getenv(env: cstring): cstring {.importc: "getenv", header: "<stdlib.h>".} | ||
| proc c_putenv_s(envname: cstring, envval: cstring): cint {.importc: "_putenv_s", header: "<stdlib.h>".} | ||
| proc c_wgetenv(varname: WideCString): WideCString {.importc: "_wgetenv", header: "<stdlib.h>".} | ||
|
|
||
| var errno {.importc, header: "<errno.h>".}: cint | ||
| type wchar_t {.importc: "wchar_t".} = int16 | ||
| var gWenviron {.importc:"_wenviron".}: ptr ptr wchar_t | ||
| # xxx `ptr UncheckedArray[WideCString]` did not work | ||
|
|
||
| proc mbstowcs_s(pReturnValue: ptr csize_t, wcstr: WideCString, sizeInWords: csize_t, mbstr: cstring, count: csize_t): cint {.importc: "mbstowcs_s", header: "<stdlib.h>".} | ||
| # xxx cint vs errno_t? | ||
|
|
||
| proc setEnvImpl*(name: cstring, value: cstring, overwrite: cint): cint = | ||
| const EINVAL = cint(22) | ||
| const MAX_ENV = 32767 | ||
| # xxx get it from: `var MAX_ENV {.importc: "_MAX_ENV", header:"<stdlib.h>".}: cint` | ||
| if overwrite == 0 and c_getenv(name) != nil: return 0 | ||
| if value[0] != '\0': | ||
| let e = c_putenv_s(name, value) | ||
| if e != 0: | ||
| errno = e | ||
| return -1 | ||
| return 0 | ||
| #[ | ||
| We are trying to set the value to an empty string, but `_putenv_s` deletes | ||
| entries if the value is an empty string, and just calling | ||
| SetEnvironmentVariableA doesn't update `_environ`, | ||
| so we have to do these terrible things. | ||
| ]# | ||
| if c_putenv_s(name, " ") != 0: | ||
| errno = EINVAL | ||
| return -1 | ||
| # Here lies the documentation we blatently ignore to make this work. | ||
| var s = c_getenv(name) | ||
| s[0] = '\0' | ||
| #[ | ||
| This would result in a double null termination, which normally signifies the | ||
| end of the environment variable list, so we stick a completely empty | ||
| environment variable into the list instead. | ||
| ]# | ||
| s[1] = '=' | ||
| #[ | ||
| If gWenviron is null, the wide environment has not been initialized | ||
| yet, and we don't need to try to update it. We have to do this otherwise | ||
| we'd be forcing the initialization and maintenance of the wide environment | ||
| even though it's never actually used in most programs. | ||
| ]# | ||
| if gWenviron != nil: | ||
| # var buf: array[MAX_ENV + 1, WideCString] | ||
| var buf: array[MAX_ENV + 1, Utf16Char] | ||
| let buf2 = cast[WideCString](buf[0].addr) | ||
| var len: csize_t | ||
| if mbstowcs_s(len.addr, buf2, buf.len.csize_t, name, MAX_ENV) != 0: | ||
| errno = EINVAL | ||
| return -1 | ||
| c_wgetenv(buf2)[0] = '\0'.Utf16Char | ||
| c_wgetenv(buf2)[1] = '='.Utf16Char | ||
|
|
||
| # And now, we have to update the outer environment to have a proper empty value. | ||
| if setEnvironmentVariableA(name, value) == 0: | ||
| errno = EINVAL | ||
| return -1 | ||
| return 0 |
Oops, something went wrong.