utimes_wasip1.go

     1  // Copyright 2025 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  //go:build wasip1
     6  
     7  package unix
     8  
     9  import (
    10  	"syscall"
    11  	"unsafe"
    12  )
    13  
    14  //go:wasmimport wasi_snapshot_preview1 path_filestat_set_times
    15  //go:noescape
    16  func path_filestat_set_times(fd int32, flags uint32, path *byte, pathLen size, atim uint64, mtim uint64, fstflags uint32) syscall.Errno
    17  
    18  func Utimensat(dirfd int, path string, times *[2]syscall.Timespec, flag int) error {
    19  	if path == "" {
    20  		return syscall.EINVAL
    21  	}
    22  	atime := syscall.TimespecToNsec(times[0])
    23  	mtime := syscall.TimespecToNsec(times[1])
    24  
    25  	var fflag uint32
    26  	if times[0].Nsec != UTIME_OMIT {
    27  		fflag |= syscall.FILESTAT_SET_ATIM
    28  	}
    29  	if times[1].Nsec != UTIME_OMIT {
    30  		fflag |= syscall.FILESTAT_SET_MTIM
    31  	}
    32  	errno := path_filestat_set_times(
    33  		int32(dirfd),
    34  		syscall.LOOKUP_SYMLINK_FOLLOW,
    35  		unsafe.StringData(path),
    36  		size(len(path)),
    37  		uint64(atime),
    38  		uint64(mtime),
    39  		fflag,
    40  	)
    41  	return errnoErr(errno)
    42  }
    43
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