Andy Dixon
8d9344cfef
On a headless Linux or BSD system (no DISPLAY or WAYLAND_DISPLAY) nothing empties the freedesktop trash, so trashing never freed space. There, d now deletes permanently after an explicit confirmation, checking owner and type against the scan and removing through an os.Root on the parent so a swapped symlink cannot redirect it. o shows the folder in the map instead of launching a file manager. Desktop sessions, macOS and Windows are unchanged.
79 lines
2.1 KiB
Go
79 lines
2.1 KiB
Go
package platform
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import (
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"errors"
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"strconv"
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"syscall"
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"unsafe"
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)
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// TrashName is the user-facing name of the trash.
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const TrashName = "Recycle Bin"
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// Reveal selects the item in Explorer.
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func Reveal(path string) error {
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if err := checkAbs(path); err != nil {
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return err
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}
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return startDetached("explorer.exe", "/select,", path)
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}
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var (
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shell32 = syscall.NewLazyDLL("shell32.dll")
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procSHFileOpertn = shell32.NewProc("SHFileOperationW")
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)
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// shFileOpStruct mirrors SHFILEOPSTRUCTW (64-bit natural alignment).
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type shFileOpStruct struct {
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hwnd uintptr
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wFunc uint32
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pFrom *uint16
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pTo *uint16
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fFlags uint16
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fAnyOperationsAborted int32
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hNameMappings uintptr
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lpszProgressTitle *uint16
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}
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const (
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foDelete = 0x3
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fofSilent = 0x4
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fofNoConfirmation = 0x10
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fofAllowUndo = 0x40
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fofNoErrorUI = 0x400
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fofNoConfirmMkdir = 0x200
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)
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// Trash moves path to the Recycle Bin via SHFileOperationW with
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// FOF_ALLOWUNDO. It never deletes permanently. want is not checked here:
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// Windows exposes no owner or inode identity through the scan.
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func Trash(path string, _ Expect) error {
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if err := checkAbs(path); err != nil {
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return err
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}
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if unsafe.Sizeof(uintptr(0)) != 8 {
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return errors.New("recycle bin support requires a 64-bit build")
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}
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u, err := syscall.UTF16FromString(path)
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if err != nil {
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return err
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}
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u = append(u, 0) // double NUL terminated list
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op := shFileOpStruct{wFunc: foDelete, pFrom: &u[0],
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fFlags: fofAllowUndo | fofNoConfirmation | fofSilent | fofNoErrorUI | fofNoConfirmMkdir}
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r, _, _ := procSHFileOpertn.Call(uintptr(unsafe.Pointer(&op)))
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if r != 0 {
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return errors.New("SHFileOperation failed: code " + strconv.Itoa(int(r)))
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}
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if op.fAnyOperationsAborted != 0 {
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return errors.New("operation aborted")
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}
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return nil
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}
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// Headless is always false: Windows always has Explorer and the Recycle Bin.
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func Headless() bool { return false }
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// Delete is not offered on Windows; items go to the Recycle Bin.
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func Delete(string, Expect) error { return errors.New("permanent delete not supported on Windows") }
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