dirent_dragonfly.go

     1  // Copyright 2020 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package os
     6  
     7  import (
     8  	"syscall"
     9  	"unsafe"
    10  )
    11  
    12  func direntIno(buf []byte) (uint64, bool) {
    13  	return readInt(buf, unsafe.Offsetof(syscall.Dirent{}.Fileno), unsafe.Sizeof(syscall.Dirent{}.Fileno))
    14  }
    15  
    16  func direntReclen(buf []byte) (uint64, bool) {
    17  	namlen, ok := direntNamlen(buf)
    18  	if !ok {
    19  		return 0, false
    20  	}
    21  	return (16 + namlen + 1 + 7) &^ 7, true
    22  }
    23  
    24  func direntNamlen(buf []byte) (uint64, bool) {
    25  	return readInt(buf, unsafe.Offsetof(syscall.Dirent{}.Namlen), unsafe.Sizeof(syscall.Dirent{}.Namlen))
    26  }
    27  
    28  func direntType(buf []byte) FileMode {
    29  	off := unsafe.Offsetof(syscall.Dirent{}.Type)
    30  	if off >= uintptr(len(buf)) {
    31  		return ^FileMode(0) // unknown
    32  	}
    33  	typ := buf[off]
    34  	switch typ {
    35  	case syscall.DT_BLK:
    36  		return ModeDevice
    37  	case syscall.DT_CHR:
    38  		return ModeDevice | ModeCharDevice
    39  	case syscall.DT_DBF:
    40  		// DT_DBF is "database record file".
    41  		// fillFileStatFromSys treats as regular file.
    42  		return 0
    43  	case syscall.DT_DIR:
    44  		return ModeDir
    45  	case syscall.DT_FIFO:
    46  		return ModeNamedPipe
    47  	case syscall.DT_LNK:
    48  		return ModeSymlink
    49  	case syscall.DT_REG:
    50  		return 0
    51  	case syscall.DT_SOCK:
    52  		return ModeSocket
    53  	}
    54  	return ^FileMode(0) // unknown
    55  }
    56
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