file_open_wasip1.go

     1  // Copyright 2023 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 os
     8  
     9  import (
    10  	"internal/poll"
    11  	"syscall"
    12  )
    13  
    14  func open(filePath string, flag int, perm uint32) (int, poll.SysFile, error) {
    15  	if filePath == "" {
    16  		return -1, poll.SysFile{}, syscall.EINVAL
    17  	}
    18  	absPath := filePath
    19  	// os.(*File).Chdir is emulated by setting the working directory to the
    20  	// absolute path that this file was opened at, which is why we have to
    21  	// resolve and capture it here.
    22  	if filePath[0] != '/' {
    23  		wd, err := syscall.Getwd()
    24  		if err != nil {
    25  			return -1, poll.SysFile{}, err
    26  		}
    27  		absPath = joinPath(wd, filePath)
    28  	}
    29  	fd, err := syscall.Open(absPath, flag, perm)
    30  	return fd, poll.SysFile{Path: absPath}, err
    31  }
    32
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