Created
February 5, 2023 09:53
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unit for attch to console with windows gui application
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//go:build windows | |
/* | |
* written by Zen.Liu, License as MIT | |
*/ | |
package main | |
import ( | |
"os" | |
s "syscall" | |
) | |
// https://www.tillett.info/2013/05/13/how-to-create-a-windows-program-that-works-as-both-as-a-gui-and-console-application/ | |
const AttachParentProcess = ^uintptr(0) | |
func allocConsole() { | |
aOut := attachable(s.STD_OUTPUT_HANDLE) | |
aIn := attachable(s.STD_INPUT_HANDLE) | |
aErr := attachable(s.STD_ERROR_HANDLE) | |
ac := false | |
kernel32 := s.MustLoadDLL("kernel32.dll") | |
if aErr && aOut { | |
if r, _, _ := kernel32.MustFindProc("AttachConsole").Call(AttachParentProcess); r != 0 { | |
ac = true | |
} else if r, _, _ = kernel32.MustFindProc("AllocConsole").Call(); r != 0 { | |
ac = true | |
} | |
} | |
if ac { | |
if aOut { | |
os.Stdout, _ = os.OpenFile("CONOUT$", os.O_WRONLY, 0666) | |
} | |
if aErr { | |
os.Stderr, _ = os.OpenFile("CONOUT$", os.O_WRONLY, 0666) | |
} | |
if aIn { | |
os.Stderr, _ = os.OpenFile("CONIN$", os.O_RDONLY, 0666) | |
} | |
} | |
} | |
func attachable(std int) bool { | |
if hOut, _ := s.GetStdHandle(std); hOut != 0 { | |
tOut, _ := s.GetFileType(hOut) | |
if tOut == s.FILE_TYPE_DISK || tOut == s.FILE_TYPE_PIPE { | |
return false | |
} | |
} | |
return true | |
} |
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