Removes need for redundant ParentWithContext implementations. It had led
to it being unsupported on FreeBSD and OpenBSD even though
PpidWithContext was available for them, and different implementations
for getting the parent info used in ParentWithContext and
PpidWithContext on Darwin and Linux.
PROCESS_QUERY_INFORMATION was used for compatibility reasons with
Windows XP / Server 2003. Both are no longer supported in Golang
and haven't been for a while (since Go 1.11). It should be safe
to drop this flag. PROCESS_QUERY_LIMITED_INFORMATION supports
PPL process such as LSASS, which are not queryable without this
change.
Add support (for Linux and Windows for now) for reading the
environment variables of a process, with a similar syntax to
os.Environ().
For Windows, this includes some refactoring for clean access to the
RTL_USER_PROCESS_PARAMETERS structure which points to the command
line and the environment variables.
* All context-less wrapping functions (the ones without WithContext
suffix) were moved into process.go since they all are the same.
* Call context is now passed to all underlying functions in
*WithContext() functions.
* All common *BSD bits were moved to process_bsd.go.
* Process.Tgid() method lacked a WithContext counterpart, so
Process.TgidWithContext() was added for uniformity.
* NewProcessWithContext() function was added since NewProcess() is
used a lot throughout the module, and there is no way to pass a
context to it.
This is a part of #761 effort.
All functions used from github.com/shirou/w32 are also available from
golang.org/x/sys/windows which is already used in other places. Convert
the remaining usages to use the functions from x/sys/windows.
This method only lets a 32bit program get other 32bit processes exe path
and a 64bit program get other 64bit processes exe path, so we fallback to
the slow (but kind of reliable) WMI calls if we can't access to the other
process module.