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pstree.go
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pstree.go
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package main
import (
"bytes"
"flag"
"fmt"
"log"
"unsafe"
)
//go:noescape
func Bpxcall(plist []unsafe.Pointer, bpx_offset int64)
const (
BPX4GTH = 1056
PGTHA_FIRST = 0
PGTHA_CURRENT = 1
PGTHA_NEXT = 2
PGTHA_LAST = 3
PGTHA_PROCESS = 0x80
PGTHA_CONTTY = 0x40
PGTHA_PATH = 0x20
PGTHA_COMMAND = 0x10
PGTHA_FILEDATA = 0x08
PGTHA_THREAD = 0x04
PGTHA_PTAG = 0x02
PGTHA_COMMANDLONG = 0x01
)
type Pgtha struct {
Pid int32
Thid [8]byte
Accesspid byte
Accesstid byte
Accessasid uint16
Loginname [8]byte
Flag1 byte
Flag1b2 byte
}
type Pgthb struct {
Id uint32
Pid int32
Thid [8]byte
Accesspid byte
Accesstid byte
_ [2]byte
Len_used int32
OffsetProcess int32
OffsetContty int32
OffsetPath int32
OffsetCommand int32
OffsetFiledata int32
OffsetThread int32
}
type Pgthc struct {
Id uint32
Flag1 byte
Flag2 byte
Flag3 byte
_ byte
Pid int32
Ppid int32
Pgpid int32
Sid int32
Fgpid int32
Euid int32
Ruid int32
Suid int32
Egid int32
Rgid int32
Sgid int32
Tsize int32
SyscallCount int32
Usertime int32
Systime int32
Starttime int32
Cntoe uint16
Cntptcreated uint16
Cntthreads uint16
Asid uint16
Jobname [8]byte
Loginname [8]byte
Memlimit int32
}
type Pgthf struct {
Id uint32
Len uint16
Command [4096]byte
}
type Outline struct {
Pid int32
Ppid int32
Command string
}
type Process struct {
Pid int32
Ppid int32
Cmd string
Children []int32
}
type PidMap map[int32]*Process
func process(outlines []Outline) {
pmap := make(PidMap)
pmap[1] = &Process{1, 0, "--root--", nil}
for _, value := range outlines {
p := new(Process)
pmap[value.Pid] = p
p.Pid = value.Pid
p.Ppid = value.Ppid
p.Cmd = value.Command
}
for pid, stuff := range pmap {
if pid == 1 {
continue
}
if pmap[stuff.Ppid] == nil {
pmap[1].Children = append(pmap[1].Children, pid)
} else {
pmap[stuff.Ppid].Children = append(pmap[stuff.Ppid].Children, pid)
}
}
boxes := make([]byte, 2048)
for i := range boxes {
boxes[i] = ' '
}
res := doPrint(pmap, 1, 0, boxes)
fmt.Print(res)
}
var asciiBox bool
func boxString(in []byte) (out string) {
if asciiBox {
out = string(in)
} else {
var b bytes.Buffer
sz := len(in)
for i, v := range in {
if v == '-' {
b.WriteRune('\u2500')
} else if v == '+' {
b.WriteRune('\u2514')
} else if v == '|' {
if i < (sz - 1) {
if in[i+1] == ' ' {
b.WriteRune('\u2502')
} else {
b.WriteRune('\u251c')
}
}
} else {
b.WriteByte(v)
}
}
out = b.String()
}
return
}
func doPrint(pidmap PidMap, pid int32, depth int, boxes []byte) string {
buffer := new(bytes.Buffer)
if pid != 1 {
fmt.Fprintf(buffer, "%s(%v) %v\n", boxString(boxes[:depth*2]), pid, pidmap[pid].Cmd)
if boxes[depth*2-2] != '|' {
boxes[depth*2-2] = ' '
}
boxes[depth*2-1] = ' '
}
z := len(pidmap[pid].Children)
for i, child := range pidmap[pid].Children {
if i == (z - 1) {
boxes[depth*2] = '+'
boxes[depth*2+1] = '-'
} else {
boxes[depth*2] = '|'
boxes[depth*2+1] = '-'
}
fmt.Fprintf(buffer, doPrint(pidmap, child, depth+1, boxes))
}
return buffer.String()
}
func convCommand(in []byte) {
e2at := [...]byte{
0x20, 0x01, 0x02, 0x03, 0x9c, 0x09, 0x86, 0x7f, 0x97, 0x8d, 0x8e, 0x0b,
0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x9d, 0x0a, 0x08, 0x87,
0x18, 0x19, 0x92, 0x8f, 0x1c, 0x1d, 0x1e, 0x1f, 0x80, 0x81, 0x82, 0x83,
0x84, 0x85, 0x17, 0x1b, 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x05, 0x06, 0x07,
0x90, 0x91, 0x16, 0x93, 0x94, 0x95, 0x96, 0x04, 0x98, 0x99, 0x9a, 0x9b,
0x14, 0x15, 0x9e, 0x1a, 0x20, 0xa0, 0xe2, 0xe4, 0xe0, 0xe1, 0xe3, 0xe5,
0xe7, 0xf1, 0xa2, 0x2e, 0x3c, 0x28, 0x2b, 0x7c, 0x26, 0xe9, 0xea, 0xeb,
0xe8, 0xed, 0xee, 0xef, 0xec, 0xdf, 0x21, 0x24, 0x2a, 0x29, 0x3b, 0x5e,
0x2d, 0x2f, 0xc2, 0xc4, 0xc0, 0xc1, 0xc3, 0xc5, 0xc7, 0xd1, 0xa6, 0x2c,
0x25, 0x5f, 0x3e, 0x3f, 0xf8, 0xc9, 0xca, 0xcb, 0xc8, 0xcd, 0xce, 0xcf,
0xcc, 0x60, 0x3a, 0x23, 0x40, 0x27, 0x3d, 0x22, 0xd8, 0x61, 0x62, 0x63,
0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0xab, 0xbb, 0xf0, 0xfd, 0xfe, 0xb1,
0xb0, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0xaa, 0xba,
0xe6, 0xb8, 0xc6, 0xa4, 0xb5, 0x7e, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
0x79, 0x7a, 0xa1, 0xbf, 0xd0, 0x5b, 0xde, 0xae, 0xac, 0xa3, 0xa5, 0xb7,
0xa9, 0xa7, 0xb6, 0xbc, 0xbd, 0xbe, 0xdd, 0xa8, 0xaf, 0x5d, 0xb4, 0xd7,
0x7b, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0xad, 0xf4,
0xf6, 0xf2, 0xf3, 0xf5, 0x7d, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50,
0x51, 0x52, 0xb9, 0xfb, 0xfc, 0xf9, 0xfa, 0xff, 0x5c, 0xf7, 0x53, 0x54,
0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0xb2, 0xd4, 0xd6, 0xd2, 0xd3, 0xd5,
0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0xb3, 0xdb,
0xdc, 0xd9, 0xda, 0x9f,
}
for i := 0; i < len(in); i++ {
in[i] = e2at[in[i]]
}
}
func main() {
flag.BoolVar(&asciiBox, "A", false, "Use ASCII box characters")
flag.Parse()
var indata Pgtha
var indata_len int32
var outdata [5000]byte
var outdata_len int32
var rv int32
var rc int32
var rn int32
indata.Pid = 0
indata.Accesspid = PGTHA_FIRST
indata.Flag1 |= (PGTHA_COMMANDLONG | PGTHA_PROCESS)
outdata_len = 5000
indata_len = 26
var parms [7]unsafe.Pointer
var indata_adr unsafe.Pointer
var outdata_adr unsafe.Pointer
indata_adr = unsafe.Pointer(&indata)
outdata_adr = unsafe.Pointer(&outdata[0])
parms[0] = unsafe.Pointer(&indata_len)
parms[1] = unsafe.Pointer(&indata_adr)
parms[2] = unsafe.Pointer(&outdata_len)
parms[3] = unsafe.Pointer(&outdata_adr)
parms[4] = unsafe.Pointer(&rv)
parms[5] = unsafe.Pointer(&rc)
parms[6] = unsafe.Pointer(&rn)
outlines := make([]Outline, 0)
for true {
Bpxcall(parms[:], BPX4GTH)
if rv == -1 {
if rc != 143 {
log.Fatalf("BPX4GTH errno %d reason %x\n", rc, rn)
} else {
break
}
}
var gthc *Pgthc
var gthf *Pgthf
if rv == 0 {
for i := 0; i < 5000; i += 4 {
tag := *(*uint32)(unsafe.Pointer(&outdata[i]))
switch {
case tag == 0x87a38883:
gthc = (*Pgthc)(unsafe.Pointer(&outdata[i]))
case tag == 0x87a38886:
gthf = (*Pgthf)(unsafe.Pointer(&outdata[i]))
break
}
}
if uintptr(unsafe.Pointer(gthf)) != 0 && gthf.Len > 0 {
convCommand(gthf.Command[:gthf.Len-1])
outlines = append(outlines, Outline{gthc.Pid, gthc.Ppid, string(gthf.Command[:gthf.Len-1])})
}
indata.Accesspid = PGTHA_NEXT
indata.Pid = gthc.Pid
} else {
break
}
}
process(outlines)
}