unimplemented.go

Documentation: github.com/tetratelabs/wazero/experimental/sys

     1  package sys
     2  
     3  import (
     4  	"io/fs"
     5  
     6  	"github.com/tetratelabs/wazero/sys"
     7  )
     8  
     9  // UnimplementedFS is an FS that returns ENOSYS for all functions,
    10  // This should be embedded to have forward compatible implementations.
    11  type UnimplementedFS struct{}
    12  
    13  // OpenFile implements FS.OpenFile
    14  func (UnimplementedFS) OpenFile(path string, flag Oflag, perm fs.FileMode) (File, Errno) {
    15  	return nil, ENOSYS
    16  }
    17  
    18  // Lstat implements FS.Lstat
    19  func (UnimplementedFS) Lstat(path string) (sys.Stat_t, Errno) {
    20  	return sys.Stat_t{}, ENOSYS
    21  }
    22  
    23  // Stat implements FS.Stat
    24  func (UnimplementedFS) Stat(path string) (sys.Stat_t, Errno) {
    25  	return sys.Stat_t{}, ENOSYS
    26  }
    27  
    28  // Readlink implements FS.Readlink
    29  func (UnimplementedFS) Readlink(path string) (string, Errno) {
    30  	return "", ENOSYS
    31  }
    32  
    33  // Mkdir implements FS.Mkdir
    34  func (UnimplementedFS) Mkdir(path string, perm fs.FileMode) Errno {
    35  	return ENOSYS
    36  }
    37  
    38  // Chmod implements FS.Chmod
    39  func (UnimplementedFS) Chmod(path string, perm fs.FileMode) Errno {
    40  	return ENOSYS
    41  }
    42  
    43  // Rename implements FS.Rename
    44  func (UnimplementedFS) Rename(from, to string) Errno {
    45  	return ENOSYS
    46  }
    47  
    48  // Rmdir implements FS.Rmdir
    49  func (UnimplementedFS) Rmdir(path string) Errno {
    50  	return ENOSYS
    51  }
    52  
    53  // Link implements FS.Link
    54  func (UnimplementedFS) Link(_, _ string) Errno {
    55  	return ENOSYS
    56  }
    57  
    58  // Symlink implements FS.Symlink
    59  func (UnimplementedFS) Symlink(_, _ string) Errno {
    60  	return ENOSYS
    61  }
    62  
    63  // Unlink implements FS.Unlink
    64  func (UnimplementedFS) Unlink(path string) Errno {
    65  	return ENOSYS
    66  }
    67  
    68  // Utimens implements FS.Utimens
    69  func (UnimplementedFS) Utimens(path string, atim, mtim int64) Errno {
    70  	return ENOSYS
    71  }
    72  
    73  // UnimplementedFile is a File that returns ENOSYS for all functions,
    74  // except where no-op are otherwise documented.
    75  //
    76  // This should be embedded to have forward compatible implementations.
    77  type UnimplementedFile struct{}
    78  
    79  // Dev implements File.Dev
    80  func (UnimplementedFile) Dev() (uint64, Errno) {
    81  	return 0, 0
    82  }
    83  
    84  // Ino implements File.Ino
    85  func (UnimplementedFile) Ino() (sys.Inode, Errno) {
    86  	return 0, 0
    87  }
    88  
    89  // IsDir implements File.IsDir
    90  func (UnimplementedFile) IsDir() (bool, Errno) {
    91  	return false, 0
    92  }
    93  
    94  // IsAppend implements File.IsAppend
    95  func (UnimplementedFile) IsAppend() bool {
    96  	return false
    97  }
    98  
    99  // SetAppend implements File.SetAppend
   100  func (UnimplementedFile) SetAppend(bool) Errno {
   101  	return ENOSYS
   102  }
   103  
   104  // Stat implements File.Stat
   105  func (UnimplementedFile) Stat() (sys.Stat_t, Errno) {
   106  	return sys.Stat_t{}, ENOSYS
   107  }
   108  
   109  // Read implements File.Read
   110  func (UnimplementedFile) Read([]byte) (int, Errno) {
   111  	return 0, ENOSYS
   112  }
   113  
   114  // Pread implements File.Pread
   115  func (UnimplementedFile) Pread([]byte, int64) (int, Errno) {
   116  	return 0, ENOSYS
   117  }
   118  
   119  // Seek implements File.Seek
   120  func (UnimplementedFile) Seek(int64, int) (int64, Errno) {
   121  	return 0, ENOSYS
   122  }
   123  
   124  // Readdir implements File.Readdir
   125  func (UnimplementedFile) Readdir(int) (dirents []Dirent, errno Errno) {
   126  	return nil, ENOSYS
   127  }
   128  
   129  // Write implements File.Write
   130  func (UnimplementedFile) Write([]byte) (int, Errno) {
   131  	return 0, ENOSYS
   132  }
   133  
   134  // Pwrite implements File.Pwrite
   135  func (UnimplementedFile) Pwrite([]byte, int64) (int, Errno) {
   136  	return 0, ENOSYS
   137  }
   138  
   139  // Truncate implements File.Truncate
   140  func (UnimplementedFile) Truncate(int64) Errno {
   141  	return ENOSYS
   142  }
   143  
   144  // Sync implements File.Sync
   145  func (UnimplementedFile) Sync() Errno {
   146  	return 0 // not ENOSYS
   147  }
   148  
   149  // Datasync implements File.Datasync
   150  func (UnimplementedFile) Datasync() Errno {
   151  	return 0 // not ENOSYS
   152  }
   153  
   154  // Utimens implements File.Utimens
   155  func (UnimplementedFile) Utimens(int64, int64) Errno {
   156  	return ENOSYS
   157  }
   158  
   159  // Close implements File.Close
   160  func (UnimplementedFile) Close() (errno Errno) { return }
   161
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