99 lines
2.3 KiB
Go
99 lines
2.3 KiB
Go
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// +build windows
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// +build !go1.4
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package mousetrap
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import (
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"fmt"
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"os"
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"syscall"
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"unsafe"
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)
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const (
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// defined by the Win32 API
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th32cs_snapprocess uintptr = 0x2
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)
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var (
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kernel = syscall.MustLoadDLL("kernel32.dll")
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CreateToolhelp32Snapshot = kernel.MustFindProc("CreateToolhelp32Snapshot")
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Process32First = kernel.MustFindProc("Process32FirstW")
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Process32Next = kernel.MustFindProc("Process32NextW")
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)
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// ProcessEntry32 structure defined by the Win32 API
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type processEntry32 struct {
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dwSize uint32
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cntUsage uint32
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th32ProcessID uint32
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th32DefaultHeapID int
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th32ModuleID uint32
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cntThreads uint32
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th32ParentProcessID uint32
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pcPriClassBase int32
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dwFlags uint32
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szExeFile [syscall.MAX_PATH]uint16
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}
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func getProcessEntry(pid int) (pe *processEntry32, err error) {
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snapshot, _, e1 := CreateToolhelp32Snapshot.Call(th32cs_snapprocess, uintptr(0))
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if snapshot == uintptr(syscall.InvalidHandle) {
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err = fmt.Errorf("CreateToolhelp32Snapshot: %v", e1)
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return
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}
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defer syscall.CloseHandle(syscall.Handle(snapshot))
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var processEntry processEntry32
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processEntry.dwSize = uint32(unsafe.Sizeof(processEntry))
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ok, _, e1 := Process32First.Call(snapshot, uintptr(unsafe.Pointer(&processEntry)))
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if ok == 0 {
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err = fmt.Errorf("Process32First: %v", e1)
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return
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}
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for {
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if processEntry.th32ProcessID == uint32(pid) {
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pe = &processEntry
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return
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}
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ok, _, e1 = Process32Next.Call(snapshot, uintptr(unsafe.Pointer(&processEntry)))
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if ok == 0 {
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err = fmt.Errorf("Process32Next: %v", e1)
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return
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}
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}
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}
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func getppid() (pid int, err error) {
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pe, err := getProcessEntry(os.Getpid())
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if err != nil {
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return
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}
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pid = int(pe.th32ParentProcessID)
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return
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}
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// StartedByExplorer returns true if the program was invoked by the user double-clicking
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// on the executable from explorer.exe
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//
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// It is conservative and returns false if any of the internal calls fail.
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// It does not guarantee that the program was run from a terminal. It only can tell you
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// whether it was launched from explorer.exe
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func StartedByExplorer() bool {
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ppid, err := getppid()
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if err != nil {
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return false
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}
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pe, err := getProcessEntry(ppid)
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if err != nil {
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return false
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}
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name := syscall.UTF16ToString(pe.szExeFile[:])
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return name == "explorer.exe"
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}
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