syscall : add a field to ProcAttr so that StartProcess can hide the executed application on windows
The SW_HIDE parameter looks like the only way for a windows GUI application to execute a CLI subcommand without having a shell windows appearing.
R=brainman, golang-dev, bradfitzgo, rsc1
CC=golang-dev
https://golang.org/cl/4439055
diff --git a/src/pkg/syscall/exec_windows.go b/src/pkg/syscall/exec_windows.go
index ce855f5..85b1c2e 100644
--- a/src/pkg/syscall/exec_windows.go
+++ b/src/pkg/syscall/exec_windows.go
@@ -218,9 +218,10 @@
}
type ProcAttr struct {
- Dir string
- Env []string
- Files []int
+ Dir string
+ Env []string
+ Files []int
+ HideWindow bool
}
var zeroAttributes ProcAttr
@@ -282,6 +283,10 @@
si := new(StartupInfo)
si.Cb = uint32(unsafe.Sizeof(*si))
si.Flags = STARTF_USESTDHANDLES
+ if attr.HideWindow {
+ si.Flags |= STARTF_USESHOWWINDOW
+ si.ShowWindow = SW_HIDE
+ }
si.StdInput = fd[0]
si.StdOutput = fd[1]
si.StdErr = fd[2]
diff --git a/src/pkg/syscall/ztypes_windows_386.go b/src/pkg/syscall/ztypes_windows_386.go
index 56d4198..3a50be1 100644
--- a/src/pkg/syscall/ztypes_windows_386.go
+++ b/src/pkg/syscall/ztypes_windows_386.go
@@ -77,6 +77,7 @@
HANDLE_FLAG_INHERIT = 0x00000001
STARTF_USESTDHANDLES = 0x00000100
+ STARTF_USESHOWWINDOW = 0x00000001
DUPLICATE_CLOSE_SOURCE = 0x00000001
DUPLICATE_SAME_ACCESS = 0x00000002
@@ -240,6 +241,25 @@
FileIndexLow uint32
}
+// ShowWindow constants
+const (
+ // winuser.h
+ SW_HIDE = 0
+ SW_NORMAL = 1
+ SW_SHOWNORMAL = 1
+ SW_SHOWMINIMIZED = 2
+ SW_SHOWMAXIMIZED = 3
+ SW_MAXIMIZE = 3
+ SW_SHOWNOACTIVATE = 4
+ SW_SHOW = 5
+ SW_MINIMIZE = 6
+ SW_SHOWMINNOACTIVE = 7
+ SW_SHOWNA = 8
+ SW_RESTORE = 9
+ SW_SHOWDEFAULT = 10
+ SW_FORCEMINIMIZE = 11
+)
+
type StartupInfo struct {
Cb uint32
_ *uint16
