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Add APIs to fetch processes information #6
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# Changelog | ||
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* Add GetProcessMemoryInfo: [#2](https://github.com/elastic/go-windows/pull/2) | ||
* Add APIs to fetch process information: | ||
- NtQueryInformationProcess | ||
- ReadProcessMemory | ||
- GetProcessImageFileName | ||
- EnumProcesses | ||
[#6](https://github.com/elastic/go-windows/pull/6) |
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// Licensed to Elasticsearch B.V. under one or more contributor | ||
// license agreements. See the NOTICE file distributed with | ||
// this work for additional information regarding copyright | ||
// ownership. Elasticsearch B.V. licenses this file to you 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. | ||
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// +build windows | ||
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package windows | ||
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const ( | ||
// This process access rights are missing from Go's syscall package as of 1.10.3 | ||
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// PROCESS_VM_READ right allows to read memory from the target process. | ||
PROCESS_VM_READ = 0x10 | ||
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// PROCESS_QUERY_LIMITED_INFORMATION right allows to access a subset of the | ||
// information granted by PROCESS_QUERY_INFORMATION. Not available in XP | ||
// and Server 2003. | ||
PROCESS_QUERY_LIMITED_INFORMATION = 0x1000 | ||
) |
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// Licensed to Elasticsearch B.V. under one or more contributor | ||
// license agreements. See the NOTICE file distributed with | ||
// this work for additional information regarding copyright | ||
// ownership. Elasticsearch B.V. licenses this file to you 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. | ||
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// +build windows | ||
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package windows | ||
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import ( | ||
"fmt" | ||
"syscall" | ||
"unsafe" | ||
) | ||
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const ( | ||
// SizeOfProcessBasicInformationStruct gives the size | ||
// of the ProcessBasicInformationStruct struct. | ||
SizeOfProcessBasicInformationStruct = unsafe.Sizeof(ProcessBasicInformationStruct{}) | ||
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// SizeOfRtlUserProcessParameters gives the size | ||
// of the RtlUserProcessParameters struct. | ||
SizeOfRtlUserProcessParameters = unsafe.Sizeof(RtlUserProcessParameters{}) | ||
) | ||
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// NTStatus is an error wrapper for NTSTATUS values, 32bit error-codes returned | ||
// by the NT Kernel. | ||
type NTStatus uint32 | ||
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// ProcessInfoClass is Go's counterpart for the PROCESSINFOCLASS enumeration | ||
// defined in ntdll.h. | ||
type ProcessInfoClass uint32 | ||
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const ( | ||
// ProcessInfoClass enumeration values that can be used as arguments to | ||
// NtQueryInformationProcess | ||
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// ProcessBasicInformation returns a pointer to | ||
// the Process Environment Block (PEB) structure. | ||
ProcessBasicInformation ProcessInfoClass = 0 | ||
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// ProcessDebugPort returns a uint32 that is the port number for the | ||
// debugger of the process. | ||
ProcessDebugPort = 7 | ||
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// ProcessWow64Information returns whether a process is running under | ||
// WOW64. | ||
ProcessWow64Information = 26 | ||
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// ProcessImageFileName returns the image file name for the process, as a | ||
// UnicodeString struct. | ||
ProcessImageFileName = 27 | ||
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// ProcessBreakOnTermination returns a uintptr that tells if the process | ||
// is critical. | ||
ProcessBreakOnTermination = 29 | ||
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// ProcessSubsystemInformation returns the subsystem type of the process. | ||
ProcessSubsystemInformation = 75 | ||
) | ||
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// ProcessBasicInformationStruct is Go's counterpart of the | ||
// PROCESS_BASIC_INFORMATION struct, returned by NtQueryInformationProcess | ||
// when ProcessBasicInformation is requested. | ||
type ProcessBasicInformationStruct struct { | ||
Reserved1 uintptr | ||
PebBaseAddress uintptr | ||
Reserved2 [2]uintptr | ||
UniqueProcessID uintptr | ||
// Undocumented: | ||
InheritedFromUniqueProcessID uintptr | ||
} | ||
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// UnicodeString is Go's equivalent for the _UNICODE_STRING struct. | ||
type UnicodeString struct { | ||
Size uint16 | ||
MaximumLength uint16 | ||
Buffer uintptr | ||
} | ||
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// RtlUserProcessParameters is Go's equivalent for the | ||
// _RTL_USER_PROCESS_PARAMETERS struct. | ||
// A few undocumented fields are exposed. | ||
type RtlUserProcessParameters struct { | ||
Reserved1 [16]byte | ||
Reserved2 [5]uintptr | ||
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// <undocumented> | ||
CurrentDirectoryPath UnicodeString | ||
CurrentDirectoryHandle uintptr | ||
DllPath UnicodeString | ||
// </undocumented> | ||
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ImagePathName UnicodeString | ||
CommandLine UnicodeString | ||
} | ||
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// Syscalls | ||
// Warning: NtQueryInformationProcess is an unsupported API that can change | ||
// in future versions of Windows. Available from XP to Windows 10. | ||
//sys _NtQueryInformationProcess(handle syscall.Handle, infoClass uint32, info uintptr, infoLen uint32, returnLen *uint32) (ntStatus uint32) = ntdll.NtQueryInformationProcess | ||
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// NtQueryInformationProcess is a wrapper for ntdll.NtQueryInformationProcess. | ||
// The handle must have the PROCESS_QUERY_INFORMATION access right. | ||
// Returns an error of type NTStatus. | ||
func NtQueryInformationProcess(handle syscall.Handle, infoClass ProcessInfoClass, info unsafe.Pointer, infoLen uint32) (returnedLen uint32, err error) { | ||
status := _NtQueryInformationProcess(handle, uint32(infoClass), uintptr(info), infoLen, &returnedLen) | ||
if status != 0 { | ||
return returnedLen, NTStatus(status) | ||
} | ||
return returnedLen, nil | ||
} | ||
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// Error prints the wrapped NTSTATUS in hex form. | ||
func (status NTStatus) Error() string { | ||
return fmt.Sprintf("ntstatus=%x", uint32(status)) | ||
} |
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nit: add a period to end the sentence.