1 // Copyright 2015 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 // +build darwin dragonfly freebsd linux netbsd openbsd solaris 6 7 package main 8 9 // Test a shared library created by -buildmode=c-shared that does not 10 // export anything. 11 12 import ( 13 "fmt" 14 "os" 15 "syscall" 16 ) 17 18 // To test this we want to communicate between the main program and 19 // the shared library without using any exported symbols. The init 20 // function creates a pipe and Dups the read end to a known number 21 // that the C code can also use. 22 23 const ( 24 fd = 100 25 ) 26 27 func init() { 28 var p [2]int 29 if e := syscall.Pipe(p[0:]); e != nil { 30 fmt.Fprintf(os.Stderr, "pipe: %v\n", e) 31 os.Exit(2) 32 } 33 34 if e := dup2(p[0], fd); e != nil { 35 fmt.Fprintf(os.Stderr, "dup2: %v\n", e) 36 os.Exit(2) 37 } 38 39 const str = "PASS" 40 if n, e := syscall.Write(p[1], []byte(str)); e != nil || n != len(str) { 41 fmt.Fprintf(os.Stderr, "write: %d %v\n", n, e) 42 os.Exit(2) 43 } 44 45 if e := syscall.Close(p[1]); e != nil { 46 fmt.Fprintf(os.Stderr, "close: %v\n", e) 47 os.Exit(2) 48 } 49 } 50 51 func main() { 52 } 53
