github.com/tinygo-org/tinygo@v0.31.3-0.20240404173401-90b0bf646c27/src/os/dirent_linux.go (about)

     1  //go:build !baremetal && !js && !wasip1
     2  
     3  // Copyright 2020 The Go Authors. All rights reserved.
     4  // Use of this source code is governed by a BSD-style
     5  // license that can be found in the LICENSE file.
     6  
     7  package os
     8  
     9  import (
    10  	"syscall"
    11  	"unsafe"
    12  )
    13  
    14  func direntIno(buf []byte) (uint64, bool) {
    15  	return readInt(buf, unsafe.Offsetof(syscall.Dirent{}.Ino), unsafe.Sizeof(syscall.Dirent{}.Ino))
    16  }
    17  
    18  func direntReclen(buf []byte) (uint64, bool) {
    19  	return readInt(buf, unsafe.Offsetof(syscall.Dirent{}.Reclen), unsafe.Sizeof(syscall.Dirent{}.Reclen))
    20  }
    21  
    22  func direntNamlen(buf []byte) (uint64, bool) {
    23  	reclen, ok := direntReclen(buf)
    24  	if !ok {
    25  		return 0, false
    26  	}
    27  	return reclen - uint64(unsafe.Offsetof(syscall.Dirent{}.Name)), true
    28  }
    29  
    30  func direntType(buf []byte) FileMode {
    31  	off := unsafe.Offsetof(syscall.Dirent{}.Type)
    32  	if off >= uintptr(len(buf)) {
    33  		return ^FileMode(0) // unknown
    34  	}
    35  	typ := buf[off]
    36  	switch typ {
    37  	case syscall.DT_BLK:
    38  		return ModeDevice
    39  	case syscall.DT_CHR:
    40  		return ModeDevice | ModeCharDevice
    41  	case syscall.DT_DIR:
    42  		return ModeDir
    43  	case syscall.DT_FIFO:
    44  		return ModeNamedPipe
    45  	case syscall.DT_LNK:
    46  		return ModeSymlink
    47  	case syscall.DT_REG:
    48  		return 0
    49  	case syscall.DT_SOCK:
    50  		return ModeSocket
    51  	}
    52  	return ^FileMode(0) // unknown
    53  }