all: delete dead code

go install golang.org/x/tools/cmd/deadcode@latest
deadcode -test ./...

6 files changed, 0 insertions, 151 deletions

diff --git a/pkg/osutil/osutil.go b/pkg/osutil/osutil.go
index c9ee98412..8e0ed7ea3 100644
--- a/pkg/osutil/osutil.go
+++ b/pkg/osutil/osutil.go
@@ -145,29 +145,6 @@ func IsExist(name string) bool {
 	return err == nil
 }
 
-// IsAccessible checks if the file can be opened.
-func IsAccessible(name string) error {
-	if !IsExist(name) {
-		return fmt.Errorf("%v does not exist", name)
-	}
-	f, err := os.Open(name)
-	if err != nil {
-		return fmt.Errorf("%v can't be opened (%w)", name, err)
-	}
-	f.Close()
-	return nil
-}
-
-// IsWritable checks if the file can be written.
-func IsWritable(name string) error {
-	f, err := os.OpenFile(name, os.O_WRONLY, DefaultFilePerm)
-	if err != nil {
-		return fmt.Errorf("%v can't be written (%w)", name, err)
-	}
-	f.Close()
-	return nil
-}
-
 // FilesExist returns true if all files exist in dir.
 // Files are assumed to be relative names in slash notation.
 func FilesExist(dir string, files map[string]bool) bool {
diff --git a/pkg/osutil/osutil_fuchsia.go b/pkg/osutil/osutil_fuchsia.go
index 1ebd64eb4..fce4e38ba 100644
--- a/pkg/osutil/osutil_fuchsia.go
+++ b/pkg/osutil/osutil_fuchsia.go
@@ -6,7 +6,6 @@
 package osutil
 
 import (
-	"fmt"
 	"os"
 	"os/exec"
 	"time"
@@ -27,14 +26,6 @@ func SystemMemorySize() uint64 {
 	return 0
 }
 
-func CreateMemMappedFile(size int) (f *os.File, mem []byte, err error) {
-	return nil, nil, fmt.Errorf("CreateMemMappedFile is not implemented")
-}
-
-func CloseMemMappedFile(f *os.File, mem []byte) error {
-	return fmt.Errorf("CloseMemMappedFile is not implemented")
-}
-
 func ProcessExitStatus(ps *os.ProcessState) int {
 	// TODO: can be extracted from ExitStatus string.
 	return 0
diff --git a/pkg/osutil/osutil_unix.go b/pkg/osutil/osutil_unix.go
index 7243a7014..91a713236 100644
--- a/pkg/osutil/osutil_unix.go
+++ b/pkg/osutil/osutil_unix.go
@@ -93,43 +93,3 @@ func LongPipe() (io.ReadCloser, io.WriteCloser, error) {
 	prolongPipe(r, w)
 	return r, w, err
 }
-
-// ProcessExitStatus returns process exit status.
-// This is here only because of fuchsia that does not implement WaitStatus.
-func ProcessExitStatus(ps *os.ProcessState) int {
-	return ps.Sys().(syscall.WaitStatus).ExitStatus()
-}
-
-// CreateMemMappedFile creates a temp file with the requested size and maps it into memory.
-func CreateMemMappedFile(size int) (f *os.File, mem []byte, err error) {
-	f, err = CreateSharedMemFile(size)
-	if err != nil {
-		return
-	}
-	if err = f.Truncate(int64(size)); err != nil {
-		err = fmt.Errorf("failed to truncate shared mem file: %w", err)
-		CloseSharedMemFile(f)
-		return
-	}
-
-	mem, err = syscall.Mmap(int(f.Fd()), 0, size, syscall.PROT_READ|syscall.PROT_WRITE, syscall.MAP_SHARED)
-	if err != nil {
-		err = fmt.Errorf("failed to mmap shm file: %w", err)
-		CloseSharedMemFile(f)
-	}
-	return
-}
-
-// CloseMemMappedFile destroys memory mapping created by CreateMemMappedFile.
-func CloseMemMappedFile(f *os.File, mem []byte) error {
-	err1 := syscall.Munmap(mem)
-	err2 := CloseSharedMemFile(f)
-	switch {
-	case err1 != nil:
-		return err1
-	case err2 != nil:
-		return err2
-	default:
-		return nil
-	}
-}
diff --git a/pkg/osutil/osutil_windows.go b/pkg/osutil/osutil_windows.go
index c5763b677..03e729e83 100644
--- a/pkg/osutil/osutil_windows.go
+++ b/pkg/osutil/osutil_windows.go
@@ -4,7 +4,6 @@
 package osutil
 
 import (
-	"fmt"
 	"os"
 	"os/exec"
 	"syscall"
@@ -29,14 +28,6 @@ func SystemMemorySize() uint64 {
 func prolongPipe(r, w *os.File) {
 }
 
-func CreateMemMappedFile(size int) (f *os.File, mem []byte, err error) {
-	return nil, nil, fmt.Errorf("CreateMemMappedFile is not implemented")
-}
-
-func CloseMemMappedFile(f *os.File, mem []byte) error {
-	return fmt.Errorf("CloseMemMappedFile is not implemented")
-}
-
 func ProcessExitStatus(ps *os.ProcessState) int {
 	return ps.Sys().(syscall.WaitStatus).ExitStatus()
 }
diff --git a/pkg/osutil/sharedmem_file.go b/pkg/osutil/sharedmem_file.go
deleted file mode 100644
index 0d899fab5..000000000
--- a/pkg/osutil/sharedmem_file.go
+++ /dev/null
@@ -1,41 +0,0 @@
-// Copyright 2021 syzkaller project authors. All rights reserved.
-// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
-
-//go:build freebsd || netbsd || openbsd || darwin
-
-package osutil
-
-import (
-	"fmt"
-	"io/ioutil"
-	"os"
-)
-
-func CreateSharedMemFile(size int) (f *os.File, err error) {
-	f, err = ioutil.TempFile("./", "syzkaller-shm")
-	if err != nil {
-		err = fmt.Errorf("failed to create temp file: %v", err)
-		return
-	}
-	f.Close()
-	fname := f.Name()
-	f, err = os.OpenFile(f.Name(), os.O_RDWR, DefaultFilePerm)
-	if err != nil {
-		err = fmt.Errorf("failed to open shm file: %v", err)
-		os.Remove(fname)
-	}
-	return
-}
-
-func CloseSharedMemFile(f *os.File) error {
-	err1 := f.Close()
-	err2 := os.Remove(f.Name())
-	switch {
-	case err1 != nil:
-		return err1
-	case err2 != nil:
-		return err2
-	default:
-		return nil
-	}
-}
diff --git a/pkg/osutil/sharedmem_memfd.go b/pkg/osutil/sharedmem_memfd.go
deleted file mode 100644
index 84077b9ec..000000000
--- a/pkg/osutil/sharedmem_memfd.go
+++ /dev/null
@@ -1,29 +0,0 @@
-// Copyright 2021 syzkaller project authors. All rights reserved.
-// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
-
-//go:build linux
-
-package osutil
-
-import (
-	"fmt"
-	"os"
-
-	"golang.org/x/sys/unix"
-)
-
-// In the case of Linux, we can just use the memfd_create syscall.
-func CreateSharedMemFile(size int) (f *os.File, err error) {
-	// The name is actually irrelevant and can even be the same for all such files.
-	fd, err := unix.MemfdCreate("syz-shared-mem", unix.MFD_CLOEXEC)
-	if err != nil {
-		err = fmt.Errorf("failed to do memfd_create: %w", err)
-		return
-	}
-	f = os.NewFile(uintptr(fd), fmt.Sprintf("/proc/self/fd/%d", fd))
-	return
-}
-
-func CloseSharedMemFile(f *os.File) error {
-	return f.Close()
-}