misc: Remove open_file, openat2, etc.HEADmaster

2 files changed, 0 insertions, 111 deletions

diff --git a/misc/open_file.go b/misc/open_file.go
deleted file mode 100644
index 07ac1b8..0000000
--- a/misc/open_file.go
+++ /dev/null
@@ -1,75 +0,0 @@
-package misc
-
-import (
-	"errors"
-	"os"
-	"path"
-	"strings"
-	"syscall"
-)
-
-type Dir struct {
-	fd   int
-	name string
-}
-
-var (
-	ErrIllegalFilename        = errors.New("illegal filename")
-	ErrInvalidFD = errors.New("invalid file descriptor")
-)
-
-// Open a file at exactly the given directory.
-func OpenFileAt(dir Dir, filename string, flags int, perms os.FileMode) (*os.File, error) {
-	if strings.IndexByte(filename, '/') != -1 {
-		return nil, ErrIllegalFilename
-	}
-	return OpenFileBeneath(dir, filename, flags, perms)
-}
-
-// Open a file at or beneath the given directory.
-func OpenFileBeneath(dir Dir, filename string, flags int, perms os.FileMode) (*os.File, error) {
-	fd, err := Openat2(dir.fd, filename, &Open_how_t{
-		Flags:   uint64(flags) | syscall.O_CLOEXEC,
-		Mode:    uint64(syscallMode(perms)),
-		Resolve: RESOLVE_BENEATH | RESOLVE_NO_SYMLINKS,
-	})
-	if err != nil {
-		return nil, err
-	}
-	file := os.NewFile(uintptr(fd), path.Join(dir.name, filename))
-	if file == nil {
-		return nil, ErrInvalidFD
-	} else {
-		return file, nil
-	}
-}
-
-// Open a directory as read-only and return a Dir_t to it. The caller is
-// responsible for closing the directory with [Close_directory].
-func Open_directory_readonly(path string) (Dir, error) {
-	_fd, err := syscall.Open(path, syscall.O_RDONLY|syscall.O_DIRECTORY|syscall.O_CLOEXEC, 0)
-	return Dir{fd: _fd, name: path}, err
-}
-
-// Close a directory returned by [Open_directory_readonly].
-func (dir *Dir) Close() error {
-	return syscall.Close(dir.fd)
-}
-
-// syscallMode returns the syscall-specific mode flags from Go's portable mode flags.
-func syscallMode(i os.FileMode) (o uint32) {
-	// This part actually came from Go's os/file_posix.go but IMO it's too
-	// small and should fall under fair use.
-	o |= uint32(i.Perm())
-	if i&os.ModeSetuid != 0 {
-		o |= syscall.S_ISUID
-	}
-	if i&os.ModeSetgid != 0 {
-		o |= syscall.S_ISGID
-	}
-	if i&os.ModeSticky != 0 {
-		o |= syscall.S_ISVTX
-	}
-	// No mapping for Go's ModeTemporary (plan9 only).
-	return
-}
diff --git a/misc/openat2.go b/misc/openat2.go
deleted file mode 100644
index e5938ca..0000000
--- a/misc/openat2.go
+++ /dev/null
@@ -1,36 +0,0 @@
-package misc
-
-import (
-	"syscall"
-	"unsafe"
-)
-
-const SYS_OPENAT2 = 437
-
-type Open_how_t struct {
-	Flags   uint64
-	Mode    uint64
-	Resolve uint64
-}
-
-const (
-	RESOLVE_BENEATH       = 0x8
-	RESOLVE_IN_ROOT       = 0x10
-	RESOLVE_NO_MAGICLINKS = 0x2
-	RESOLVE_NO_SYMLINKS   = 0x4
-	RESOLVE_NO_XDEV       = 0x1
-)
-
-// See openat2(2) on Linux
-func Openat2(dirfd int, path string, open_how *Open_how_t) (fd int, err error) {
-	path_ptr, err := StringToBytePtr(path)
-	if err != nil {
-		return
-	}
-	_fd, _, errno := syscall.Syscall6(SYS_OPENAT2, uintptr(dirfd), uintptr(unsafe.Pointer(path_ptr)), uintptr(unsafe.Pointer(open_how)), uintptr(unsafe.Sizeof(Open_how_t{})), 0, 0)
-	fd = int(_fd)
-	if errno != 0 {
-		err = errno
-	}
-	return
-}