// GetProcessByFileName returns the process with the given file name.
// If multiple processes have the same filename, the first process
// enumerated by this function is returned.
func GetProcessByFileName(fileName string) (Process, error) {
// Read in process ids
PIDs := make([]uint32, 1024)
var bytesRead uint32 = 0
ok := w32.EnumProcesses(PIDs, uint32(len(PIDs)), &bytesRead)
if !ok {
panic("Error Enumerating processes.")
}
// Loop over pids,
// Divide bytesRead by sizeof(uint32) to get how many processes there are.
for i := uint32(0); i < (bytesRead / 4); i++ {
// Make sure to skip over the system process with PID 0
if PIDs[i] == 0 {
continue
}
// Check if its the process
if getFileNameByPID(PIDs[i]) == fileName {
hnd, ok := w32.OpenProcess(PROCESS_ALL_ACCESS, false, PIDs[i])
if !ok {
return Process{}, errors.New(fmt.Sprintf("Error while opening process %d", PIDs[i]))
}
return Process{ProcPlatAttribs: ProcPlatAttribs{Handle: hnd}, PID: uint64(PIDs[i])}, nil
}
}
// Couldn't find process, return an error
return Process{}, errors.New("Couldn't find process with name " + fileName)
}
//getFileNameByPID returns a file name given a PID.
func getFileNameByPID(pid uint32) string {
var fileName string = `<Unknown File>`
//Open process
hnd, ok := w32.OpenProcess(w32.PROCESS_QUERY_INFORMATION, false, pid)
if !ok {
return fileName
}
defer w32.CloseHandle(hnd)
//Get file path
path, ok := w32.GetProcessImageFileName(hnd)
if !ok {
return fileName
}
//Split file path to get file name
_, fileName = filepath.Split(path)
return fileName
}