time_fake.go

Documentation: syscall

     1  // Copyright 2019 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 faketime
     6  // +build faketime
     7  
     8  package syscall
     9  
    10  import "unsafe"
    11  
    12  const faketime = true
    13  
    14  // When faketime is enabled, we redirect writes to FDs 1 and 2 through
    15  // the runtime's write function, since that adds the framing that
    16  // reports the emulated time.
    17  
    18  //go:linkname runtimeWrite runtime.write
    19  func runtimeWrite(fd uintptr, p unsafe.Pointer, n int32) int32
    20  
    21  func faketimeWrite(fd int, p []byte) int {
    22  	var pp *byte
    23  	if len(p) > 0 {
    24  		pp = &p[0]
    25  	}
    26  	return int(runtimeWrite(uintptr(fd), unsafe.Pointer(pp), int32(len(p))))
    27  }
    28
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