func printSockets(p *procfs.Proc, sockets []*procfs.Socket) error {
fds, err := p.Fds()
if err != nil {
if !os.IsPermission(err) {
return err
}
}
inodes := []string{}
for _, fd := range fds {
inode := fd.SocketInode()
if inode != "" {
inodes = append(inodes, inode)
}
}
str := []string{}
for _, inode := range inodes {
if s := procfs.Sockets(sockets).Find(inode); s != nil {
str = append(str, fmt.Sprintf("%s %v %s", s.Protocol, s.LocalIP, s.LocalPort))
}
}
fmt.Printf(" %s", strings.Join(str, ", "))
return nil
}
func start(c *cli.Context) error {
uid := os.Getuid()
var (
sockets []*procfs.Socket
err error
)
if c.Bool("socket") {
sockets, err = procfs.ReadNet()
if err != nil {
return err
}
sort.Sort(procfs.Sockets(sockets)) //sort output by inode for faster search
}
return procfs.WalkProcs(func(p *procfs.Proc) (bool, error) {
st, err := p.Status()
if err != nil {
if os.IsNotExist(err) {
return true, nil
}
return false, err
}
if !c.Bool("all") && st.Uid != uid {
return true, nil
}
//get back user
user, err := st.User()
if err != nil {
return false, err
}
//get back process name
n := st.Name
args, err := p.CmdLine()
if err != nil {
return false, err
}
if args != nil {
n = strings.Join(args, " ")
}
//print basic infos
fmt.Printf("%s %d %d %v", user.Username, p.Pid, st.PPid, n)
if c.Bool("socket") {
//get back port bound by the process
if err := printSockets(p, sockets); err != nil {
return false, err
}
}
fmt.Printf("\n")
return true, nil
})
}