// +build linux
package ps
import (
"fmt"
"io/ioutil"
"strings"
)
// Refresh reloads all the data associated with this process.
func (p *UnixProcess) Refresh() error {
statPath := fmt.Sprintf("/proc/%d/stat", p.pid)
dataBytes, err := ioutil.ReadFile(statPath)
if err != nil {
return err
}
// First, parse out the image name
data := string(dataBytes)
binStart := strings.IndexRune(data, '(') + 1
binEnd := strings.IndexRune(data[binStart:], ')')
p.binary = data[binStart : binStart+binEnd]
// Move past the image name and start parsing the rest
data = data[binStart+binEnd+2:]
_, err = fmt.Sscanf(data,
"%c %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d",
&p.state,
&p.ppid,
&p.pgrp,
&p.sid,
&p.ttynr,
&p.tpgid,
&p.flags,
&p.minflt,
&p.cminflt,
&p.majflt,
&p.cmajflt,
&p.utime,
&p.stime,
&p.cutime,
&p.cstime,
&p.priority,
&p.nice,
&p.numthreads,
&p.itrealvalue,
&p.starttime,
&p.vsize,
&p.rss)
return err
}