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Create new functions for setting handle inheritable flag #23

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Create new functions for setting handle inheritable flag #23

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74 changes: 49 additions & 25 deletions lib/win32/process.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,52 @@ def job?
pbool.read_int == 1 ? true : false
end

# Get windows file handle for an IO obejct or fileno
def get_handle(io)

# Grab the handle
if io.respond_to?(:fileno)
handle = get_osfhandle(io.fileno)
else
handle = get_osfhandle(io)
end

# Error Check
if handle == INVALID_HANDLE_VALUE
ptr = FFI::MemoryPointer.new(:int)

if windows_version >= 6 && get_errno(ptr) == 0
errno = ptr.read_int
else
errno = FFI.errno
end

raise SystemCallError.new("get_osfhandle", errno)
end

return handle
end

# Set or unset the inheritable flag on a Windows File Handle for a
# RUBY IO object or fileno.
def set_io_handle_inherit_flag(io, inherit)

# Grab the handle and set it
handle = get_handle(io)
set_handle_inherit_flag(handle, inherit)
end

# Set or unset the inheritable flag for Windows File Handle
def set_handle_inherit_flag(handle, inherit)

# Either set to HANDLE_FLAG_INHERIT or 0 based on true or false
flag = inherit ? HANDLE_FLAG_INHERIT : 0

# Set/unset inheritable flag
bool = SetHandleInformation(handle, HANDLE_FLAG_INHERIT, flag)
raise SystemCallError.new("SetHandleInformation", FFI.errno) unless bool
end

# Returns the process and system affinity mask for the given +pid+, or the
# current process if no pid is provided. The return value is a two element
# array, with the first containing the process affinity mask, and the second
Expand Down Expand Up @@ -562,33 +608,11 @@ def create(args)
#
['stdin', 'stdout', 'stderr'].each{ |io|
if si_hash[io]
if si_hash[io].respond_to?(:fileno)
handle = get_osfhandle(si_hash[io].fileno)
else
handle = get_osfhandle(si_hash[io])
end

if handle == INVALID_HANDLE_VALUE
ptr = FFI::MemoryPointer.new(:int)

if windows_version >= 6 && get_errno(ptr) == 0
errno = ptr.read_int
else
errno = FFI.errno
end

raise SystemCallError.new("get_osfhandle", errno)
end

# Grab Windows Handle for Ruby IO or fileno
handle = get_handle(si_hash[io])
# Most implementations of Ruby on Windows create inheritable
# handles by default, but some do not. RF bug #26988.
bool = SetHandleInformation(
handle,
HANDLE_FLAG_INHERIT,
HANDLE_FLAG_INHERIT
)

raise SystemCallError.new("SetHandleInformation", FFI.errno) unless bool
set_handle_inherit_flag(handle, true)

si_hash[io] = handle
si_hash['startf_flags'] ||= 0
Expand Down