| // Copyright 2016 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package os |
| |
| import ( |
| "syscall" |
| "unsafe" |
| ) |
| |
| func executable() (string, error) { |
| mib := [4]int32{1 /* CTL_KERN */, 14 /* KERN_PROC */, 12 /* KERN_PROC_PATHNAME */, -1} |
| |
| n := uintptr(0) |
| // get length |
| _, _, err := syscall.Syscall6(syscall.SYS___SYSCTL, uintptr(unsafe.Pointer(&mib[0])), 4, 0, uintptr(unsafe.Pointer(&n)), 0, 0) |
| if err != 0 { |
| return "", err |
| } |
| if n == 0 { // shouldn't happen |
| return "", nil |
| } |
| buf := make([]byte, n) |
| _, _, err = syscall.Syscall6(syscall.SYS___SYSCTL, uintptr(unsafe.Pointer(&mib[0])), 4, uintptr(unsafe.Pointer(&buf[0])), uintptr(unsafe.Pointer(&n)), 0, 0) |
| if err != 0 { |
| return "", err |
| } |
| if n == 0 { // shouldn't happen |
| return "", nil |
| } |
| return string(buf[:n-1]), nil |
| } |
