vendor: update go-ps to not require cgo on darwin

vendor/github.com/fsouza/go-dockerclient/.gitignore

@@ -0,0 +1,2 @@
+# temporary symlink for testing
+testing/data/symlink

vendor/github.com/fsouza/go-dockerclient/.travis.yml

@@ -0,0 +1,27 @@
+language: go
+sudo: required
+go:
+  - 1.4.2
+  - 1.5.3
+  - 1.6
+  - tip
+os:
+  - linux
+  - osx
+env:
+  - GOARCH=amd64 DOCKER_VERSION=1.8.3
+  - GOARCH=386   DOCKER_VERSION=1.8.3
+  - GOARCH=amd64 DOCKER_VERSION=1.9.1
+  - GOARCH=386   DOCKER_VERSION=1.9.1
+  - GOARCH=amd64 DOCKER_VERSION=1.10.3
+  - GOARCH=386   DOCKER_VERSION=1.10.3
+install:
+  - travis_retry travis-scripts/install.bash
+script:
+  - travis-scripts/run-tests.bash
+services:
+  - docker
+matrix:
+  fast_finish: true
+  allow_failures:
+    - go: tip

vendor/github.com/mitchellh/go-ps/README.md

@@ -10,8 +10,7 @@ DLL methods for Windows, cgo for Darwin, etc.
 
 How it works:
 
-  * **Darwin** uses the `sysctl` syscall to retrieve the process table, via
-    cgo.
+  * **Darwin** uses the `sysctl` syscall to retrieve the process table.
   * **Unix** uses the procfs at `/proc` to inspect the process tree.
   * **Windows** uses the Windows API, and methods such as
     `CreateToolhelp32Snapshot` to get a point-in-time snapshot of
@@ -33,4 +32,3 @@ implemented for this library that would be nice:
 
   * FreeBSD support
   * Plan9 support
-  * Eliminate the need for cgo with Darwin

vendor/github.com/mitchellh/go-ps/process_darwin.go

@@ -2,18 +2,13 @@
 
 package ps
 
-// #include "process_darwin.h"
-import "C"
-
 import (
-	"sync"
+	"bytes"
+	"encoding/binary"
+	"syscall"
+	"unsafe"
 )
 
-// This lock is what verifies that C calling back into Go is only
-// modifying data once at a time.
-var darwinLock sync.Mutex
-var darwinProcs []Process
-
 type DarwinProcess struct {
 	pid    int
 	ppid   int
@@ -32,17 +27,6 @@ func (p *DarwinProcess) Executable() string {
 	return p.binary
 }
 
-//export go_darwin_append_proc
-func go_darwin_append_proc(pid C.pid_t, ppid C.pid_t, comm *C.char) {
-	proc := &DarwinProcess{
-		pid:    int(pid),
-		ppid:   int(ppid),
-		binary: C.GoString(comm),
-	}
-
-	darwinProcs = append(darwinProcs, proc)
-}
-
 func findProcess(pid int) (Process, error) {
 	ps, err := processes()
 	if err != nil {
@@ -59,14 +43,96 @@ func findProcess(pid int) (Process, error) {
 }
 
 func processes() ([]Process, error) {
-	darwinLock.Lock()
-	defer darwinLock.Unlock()
-	darwinProcs = make([]Process, 0, 50)
-
-	_, err := C.darwinProcesses()
+	buf, err := darwinSyscall()
 	if err != nil {
 		return nil, err
 	}
 
+	procs := make([]*kinfoProc, 0, 50)
+	k := 0
+	for i := _KINFO_STRUCT_SIZE; i < buf.Len(); i += _KINFO_STRUCT_SIZE {
+		proc := &kinfoProc{}
+		err = binary.Read(bytes.NewBuffer(buf.Bytes()[k:i]), binary.LittleEndian, proc)
+		if err != nil {
+			return nil, err
+		}
+
+		k = i
+		procs = append(procs, proc)
+	}
+
+	darwinProcs := make([]Process, len(procs))
+	for i, p := range procs {
+		darwinProcs[i] = &DarwinProcess{
+			pid:    int(p.Pid),
+			ppid:   int(p.PPid),
+			binary: darwinCstring(p.Comm),
+		}
+	}
+
 	return darwinProcs, nil
 }
+
+func darwinCstring(s [16]byte) string {
+	i := 0
+	for _, b := range s {
+		if b != 0 {
+			i++
+		} else {
+			break
+		}
+	}
+
+	return string(s[:i])
+}
+
+func darwinSyscall() (*bytes.Buffer, error) {
+	mib := [4]int32{_CTRL_KERN, _KERN_PROC, _KERN_PROC_ALL, 0}
+	size := uintptr(0)
+
+	_, _, errno := syscall.Syscall6(
+		syscall.SYS___SYSCTL,
+		uintptr(unsafe.Pointer(&mib[0])),
+		4,
+		0,
+		uintptr(unsafe.Pointer(&size)),
+		0,
+		0)
+
+	if errno != 0 {
+		return nil, errno
+	}
+
+	bs := make([]byte, size)
+	_, _, errno = syscall.Syscall6(
+		syscall.SYS___SYSCTL,
+		uintptr(unsafe.Pointer(&mib[0])),
+		4,
+		uintptr(unsafe.Pointer(&bs[0])),
+		uintptr(unsafe.Pointer(&size)),
+		0,
+		0)
+
+	if errno != 0 {
+		return nil, errno
+	}
+
+	return bytes.NewBuffer(bs[0:size]), nil
+}
+
+const (
+	_CTRL_KERN         = 1
+	_KERN_PROC         = 14
+	_KERN_PROC_ALL     = 0
+	_KINFO_STRUCT_SIZE = 648
+)
+
+type kinfoProc struct {
+	_    [40]byte
+	Pid  int32
+	_    [199]byte
+	Comm [16]byte
+	_    [301]byte
+	PPid int32
+	_    [84]byte
+}

vendor/github.com/mitchellh/go-ps/process_darwin.h

@@ -1,66 +0,0 @@
-// +build darwin
-
-#ifndef _GO_PROCESSDARWIN_H_INCLUDED
-#define _GO_PROCESSDARWIN_H_INCLUDED
-
-#include <errno.h>
-#include <stdlib.h>
-#include <sys/sysctl.h>
-
-// This is declared in process_darwin.go
-extern void go_darwin_append_proc(pid_t, pid_t, char *);
-
-// Loads the process table and calls the exported Go function to insert
-// the data back into the Go space.
-//
-// This function is implemented in C because while it would technically
-// be possible to do this all in Go, I didn't want to go spelunking through
-// header files to get all the structures properly. It is much easier to just
-// call it in C and be done with it.
-static inline int darwinProcesses() {
-    int err = 0;
-    int i = 0;
-    static const int name[] = { CTL_KERN, KERN_PROC, KERN_PROC_ALL, 0 };
-    size_t length = 0;
-    struct kinfo_proc *result = NULL;
-    size_t resultCount = 0;
-
-    // Get the length first
-    err = sysctl((int*)name, (sizeof(name) / sizeof(*name)) - 1,
-            NULL, &length, NULL, 0);
-    if (err != 0) {
-        goto ERREXIT;
-    }
-
-    // Allocate the appropriate sized buffer to read the process list
-    result = malloc(length);
-
-    // Call sysctl again with our buffer to fill it with the process list
-    err = sysctl((int*)name, (sizeof(name) / sizeof(*name)) - 1,
-            result, &length,
-            NULL, 0);
-    if (err != 0) {
-        goto ERREXIT;
-    }
-
-    resultCount = length / sizeof(struct kinfo_proc);
-    for (i = 0; i < resultCount; i++) {
-        struct kinfo_proc *single = &result[i];
-        go_darwin_append_proc(
-                single->kp_proc.p_pid,
-                single->kp_eproc.e_ppid,
-                single->kp_proc.p_comm);
-    }
-
-ERREXIT:
-    if (result != NULL) {
-        free(result);
-    }
-
-    if (err != 0) {
-        return errno;
-    }
-    return 0;
-}
-
-#endif

vendor/vendor.json

@@ -1878,6 +1878,13 @@
 			"path": "github.com/mitchellh/go-linereader",
 			"revision": "07bab5fdd9580500aea6ada0e09df4aa28e68abd"
 		},
+		{
+			"checksumSHA1": "DVXnx4zyb0wkeIdIRjwjvR7Dslo=",
+			"origin": "github.com/hashicorp/terraform/vendor/github.com/mitchellh/go-ps",
+			"path": "github.com/mitchellh/go-ps",
+			"revision": "e2d21980687ce16e58469d98dcee92d27fbbd7fb",
+			"revisionTime": "2016-08-22T16:54:47Z"
+		},
 		{
 			"path": "github.com/mitchellh/hashstructure",
 			"revision": "6b17d669fac5e2f71c16658d781ec3fdd3802b69"