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package process
import (
"fmt"
"github.com/snonux/gotop/utils"
"io/ioutil"
"log"
"regexp"
"strconv"
"strings"
"time"
)
type Process struct {
Id string
Timestamp int32
Pid int
Comm string
Cmdline string
Count map[string]int
debug string
Last bool
}
func new(pidstr string) (Process, error) {
pid, err := strconv.Atoi(pidstr)
if err != nil {
return Process{}, err
}
timestamp := int32(time.Now().Unix())
p := Process{Pid: pid, Timestamp: timestamp}
var rawIo string
if err = utils.Slurp(&rawIo, fmt.Sprintf("/proc/%d/io", pid)); err != nil {
return p, err
}
if err = p.parseRawIo(rawIo); err != nil {
return p, err
}
if err = utils.Slurp(&p.Comm, fmt.Sprintf("/proc/%d/comm", pid)); err != nil {
return p, err
}
err = utils.Slurp(&p.Cmdline, fmt.Sprintf("/proc/%d/cmdline", pid))
if p.Cmdline == "" {
p.Id = fmt.Sprintf("(%s) %s", pidstr, p.Comm)
} else {
p.Id = fmt.Sprintf("(%s) %s", pidstr, p.Cmdline)
}
return p, err
}
func (self *Process) gatherRaw(what *string, pathf string) error {
bytes, err := ioutil.ReadFile(fmt.Sprintf(pathf, self.Pid))
if err != nil {
return err
} else {
*what = string(bytes)
}
return nil
}
func (self *Process) parseRawIo(rawIo string) error {
countMap := make(map[string]int)
for _, line := range strings.Split(rawIo, "\n") {
keyval := strings.Split(line, ": ")
if len(keyval) == 2 {
count, err := strconv.Atoi(keyval[1])
if err != nil {
return err
}
countMap[keyval[0]] = count
}
}
self.Count = countMap
return nil
}
func (self *Process) String() string {
str := "=========================\n"
str += fmt.Sprintf("PID: %d\n", self.Pid)
str += fmt.Sprintf("Comm: %s\n", self.Comm)
str += fmt.Sprintf("Cmdline: %s\n", self.Cmdline)
str += fmt.Sprintf("Timestamp: %s\n", self.Timestamp)
for key, val := range self.Count {
str += fmt.Sprintf("%s=%d\n", key, val)
}
if self.debug != "" {
str += fmt.Sprintf("debug: %s\n", self.debug)
}
return str
}
func (self *Process) Print() {
fmt.Println(self)
}
func Gather(pTxChan chan<- Process) {
re, _ := regexp.Compile("^[0-9]+$")
dir, err := ioutil.ReadDir("/proc/")
if err != nil {
log.Fatal(err)
}
for _, direntry := range dir {
name := direntry.Name()
if re.MatchString(name) {
p, err := new(name)
if err == nil {
pTxChan <- p
}
}
}
pTxChan <- Process{Last: true}
}
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