The SystemTools::PutEnv function tries to provide the "putenv" API
without leaking memory. However, the kwsysDeletingCharVector singleton
frees memory that may still be referenced by the environment table,
having been placed there by putenv. If any static destruction or
processing by an external tool happens after the singleton is destroyed
and accesses the environment it will read invalid memory.
Replace use of putenv with setenv/unsetenv when available. The latter
manage internal copies of the values passed instead of referencing the
original memory. When setenv/unsetenv are not available use putenv with
a singleton that removes its values from the environment before freeing
their memory. This requires an "unputenv" implementation. On at least
some platforms it must be written in terms of "putenv" because other
APIs are not available and direct modification of the "environ" global
is not safe (e.g. on Windows there is interaction with "wenviron").
Fortunately either putenv("A=") or putenv("A") will remove "A" from the
environment on these platforms. On other platforms fall back to direct
manipulation of "environ".
Also add UnPutEnv to the API and add a test for the behavior of both.
Fix a crash which occurs when SystemTools::GetPath attempts to process
an empty environment variable.
Author: Vladimir Panteleev <vladimir@thecybershadow.net>
CommandLineArguments.cxx:
remark #181: argument is incompatible with corresponding format
string conversion
SystemInformation.cxx:
remark #193: zero used for undefined preprocessing identifier "_WIN32"
warning #177: variable "Regebx" was declared but never referenced
SystemTools.cxx(375):
remark #444: destructor for base class "std::vector<char*>" is not virtual
class kwsysDeletingCharVector : private kwsys_stl::vector<char*>
Author: Hans Johnson <hans-johnson@uiowa.edu>
Change-Id: Ibc899c3ba14990158ef7bbabace4b435b22495c3
In SystemTools::ClassInitialize, remove call to AddTranslationPath
that was originally put in place to "work around an SGI problem."
This code precluded using CMake effectively in valid directories
under "/tmp_mnt/"
We already use GetSystemTimeAsFileTime() and gettimeofday()
unconditionally on supported Windows and non-Windows platforms,
respectively. Remove outdated portability complexity.
CMake fails to find any registry paths on Windows 2000: according to regmon
it fails with an access denied error. I double checked all the access rights
and they are fine. After checking the access modes on MSDN I found that it
says KEY_WOW64_32KEY / KEY_WOW64_64KEY are not supported on Windows 2000.
CMake does not check if the current system supports Wow64 before applying
these flags.
This commit adds a check for IsWow64Process in kernel32.dll before adding
these flags.
Author: Axel Gembe <ago@bastart.eu.org>
Signed-off-by: Axel Gembe <ago@bastart.eu.org>
Pass the lpClass argument of RegCreateKeyEx as a real char[] instead of
a string literal. At least one platform declares the argument as char*
instead of "const char*".
This method replaces '//' with '/' to make the paths look nicer.
Originally it correctly skipped a leading '//' in a UNC path as the
comment says. However, commit "Removed extra variable initializations"
(2005-04-15) accidentally removed the "pos=1" initializer. It was then
incorrectly restored by commit "Added missing variable initialization"
(2005-04-15) as just "pos=0". Restore the proper initializer.
The test for this added by commit "better coverage" (2006-07-31)
included incorrect output for a sample UNC-like path. Fix it.
Commit "merge in changes for beos support" (2006-12-04) added a realpath
call for every directory parsed out of a PATH-style environment
variable. No reason was given in the commit message or comments.
The call incorrectly resolves symlinks in referenced paths. Remove it.
If BeOS support really needs it then it can be restored for that
platform with a full explanation.
The CopyFileIfDifferent, CopyFileAlways, CopyAFile and CopyADirectory
methods should always copy permissions. The special cases in which a
caller would pass copyPermissions=false should be handled at the call
site. The parameter needlessly complicates the interface and semantics
of these methods.
On Windows 7 the file size reported by 'stat' on a new file sometimes
reports zero even though the real size is correct. This causes our
CopyFileAlways method to falsely detect copy failure. Work around the
problem by trusting the state of ofstream after writing the file.
This converts the KWSys license to a pure 3-clause OSI-approved BSD
License. We drop the previous license clause requiring modified
versions to be plainly marked. We also update the KWSys copyright to
cover the full development time range.
The commit "Fix KWSys SystemTools build on cygwin with -mwin32" tried to
restore the state of the _WIN32 definition that was broken by the commit
"Optimize KWSys SystemTools::FileExists on Windows". It did so for the
case of building with -mwin32 on cygwin, but since including <windows.h>
defines _WIN32, it failed for the case of not using -mwin32.
This commit restores the state of _WIN32 in all cases by undefining it
after including <windows.h> if it was not defined beforehand.
Commit "Optimize KWSys SystemTools::FileExists on Windows" accidentally
added "#undef _WIN32" when including <windows.h> on cygwin, which breaks
builds using the -mwin32 flag. This commit removes that line and fixes
the real error it was intended to avoid.
We optimize this method by using the GetFileAttributesExA native Windows
API to check for file existence when possible. For real Windows builds
we always use it. For Cygwin we use cygwin_conv_to_win32_path to get a
native Windows path if possible and otherwise fall back to 'access'.
Cygwin-to-Windows path conversion and cache by Wojciech Migda.
See issue #8826.
This teaches ConvertToUnixSlashes to convert VMS paths into posix-style
paths. We also set the DECC$FILENAME_UNIX_ONLY feature so the process
always sees posix-style paths on disk.
When SystemTools::GetParentDirectory was fixed to never remove the root
path component from a full path we violated an assumption made by
IsSubDirectory that eventually GetParentDirectory returns an empty
string. This led to an infinite loop if the potential parent directory
is empty, so we explicitly avoid that case.
The previous change to this method broke cases where the input path does
not exist. The SystemTools::GetParentDirectory method is redundant with
the more robust SystemTools::GetFilenamePath. This replaces its
implementation to just call GetFilenamePath.
On Windows the GetLongPathName API function does not work on some
filesystems even if the file exists. In this case we should just use
the original long path name and not the GetShortPathName result.
See issue #8480.
This patch from Philip Lowman teaches SystemTools::GetRealPath to deal
with paths that do not exist by dealing with the case that realpath
returns NULL. See issue #8423.
Brad King
David Cole
Bill Hoffman
Zach Mullen
Dave Partyka
Yumin Yuan
Francois Bertel
Sebastien Barre