github.com/wasilibs/wazerox@v0.0.0-20240124024944-4923be63ab5f/sys/stat_example_test.go (about)

     1  package sys_test
     2  
     3  import (
     4  	"io/fs"
     5  	"math"
     6  
     7  	"github.com/wasilibs/wazerox/sys"
     8  )
     9  
    10  var (
    11  	walltime sys.Walltime
    12  	info     fs.FileInfo
    13  	st       sys.Stat_t
    14  )
    15  
    16  // This shows typical conversions to sys.EpochNanos type, for sys.Stat_t fields.
    17  func Example_epochNanos() {
    18  	// Convert an adapted fs.File's fs.FileInfo to Mtim.
    19  	st.Mtim = info.ModTime().UnixNano()
    20  
    21  	// Generate a fake Atim using sys.Walltime passed to wazero.ModuleConfig.
    22  	sec, nsec := walltime()
    23  	st.Atim = sec*1e9 + int64(nsec)
    24  }
    25  
    26  type fileInfoWithSys struct {
    27  	fs.FileInfo
    28  	st sys.Stat_t
    29  }
    30  
    31  func (f *fileInfoWithSys) Sys() any { return &f.st }
    32  
    33  // This shows how to return data not defined in fs.FileInfo, notably sys.Inode.
    34  func Example_inode() {
    35  	st := sys.NewStat_t(info)
    36  	st.Ino = math.MaxUint64 // arbitrary non-zero value
    37  	info = &fileInfoWithSys{info, st}
    38  }