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package process
import (
"fmt"
"io/ioutil"
"log"
"regexp"
"strconv"
"strings"
)
type Process struct {
Pid int
Cmdline string
Count map[string]int
debug string
}
func new(pidstr string) (Process, error) {
pid, err := strconv.Atoi(pidstr)
if err != nil {
return Process{}, err
}
process := Process{Pid: pid}
var rawIo string
if err = process.gatherRaw(&rawIo, "/proc/%d/io"); err != nil {
return process, err
}
if err = process.parseRawIo(rawIo); err != nil {
return process, err
}
err = process.gatherRaw(&process.Cmdline, "/proc/%d/cmdline")
return process, 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("Cmdline: %s\n", self.Cmdline)
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(processes 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) {
process, err := new(name)
if err == nil {
processes <- process
}
}
}
}
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