README
¶
pstree
pstree is a simple minded package to retrieve the process tree from a given
PID.
Installation
sh> go get github.com/sbinet/pstree
Documentation
Documentation is available on godoc:
https://godoc.org/github.com/sbinet/pstree
Example
package main
import (
"fmt"
"log"
"os"
"strconv"
"strings"
"github.com/sbinet/pstree"
)
func main() {
pid, err := strconv.Atoi(os.Args[1])
if err != nil {
log.Fatalf("could not retrieve pid: %v\n", err)
}
tree, err := pstree.New()
if err != nil {
log.Fatalf("error: %v\n", err)
}
fmt.Printf("tree[%d]: %v\n", pid, tree.Procs[pid])
display(pid, tree, 1)
}
func display(pid int, tree *pstree.Tree, indent int) {
str := strings.Repeat(" ", indent)
for _, cid := range tree.Procs[pid].Children {
proc := tree.Procs[cid]
fmt.Printf("%s%#v\n", str, proc)
display(cid, tree, indent+1)
}
}
Documentation
¶
Overview ¶
Package pstree provides an API to retrieve the process tree from procfs.
Index ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
This section is empty.
Types ¶
type Process ¶
type Process struct {
Name string `json:"name"`
Stat ProcessStat `json:"stat"`
Children []int `json:"children"`
}
Process stores information about a UNIX process.
type ProcessStat ¶
type ProcessStat struct {
PID int `json:"pid"` // process ID
Comm string `json:"comm"` // filename of the executable in parentheses
State byte `json:"state"` // process state
Ppid int `json:"ppid"` // pid of the parent process
Pgrp int `json:"pgrp"` // process group ID of the process
Session int `json:"session"` // session ID of the process
TTY int `json:"tty"` // controlling terminal of the process
Tpgid int `json:"tpgid"` // ID of foreground process group
Flags uint32 `json:"flags"` // kernel flags word of the process
Minflt uint64 `json:"minflt"` // number of minor faults the process has made which have not required loading a memory page from disk
Cminflt uint64 `json:"cminflt"` // number of minor faults the process's waited-for children have made
Majflt uint64 `json:"majflt"` // number of major faults the process has made which have required loading a memory page from disk
Cmajflt uint64 `json:"cmajflt"` // number of major faults the process's waited-for children have made
Utime uint64 `json:"utime"` // user time in clock ticks
Stime uint64 `json:"stime"` // system time in clock ticks
Cutime int64 `json:"cutime"` // children user time in clock ticks
Cstime int64 `json:"cstime"` // children system time in clock ticks
Priority int64 `json:"priority"` // priority
Nice int64 `json:"nice"` // the nice value
Nthreads int64 `json:"nthreads"` // number of threads in this process
Itrealval int64 `json:"itrealval"` // time in jiffies before next SIGALRM is sent to the process due to an interval timer
Starttime int64 `json:"starttime"` // time the process started after system boot in clock ticks
Vsize uint64 `json:"vsize"` // virtual memory size in bytes
RSS int64 `json:"rss"` // resident set size: number of pages the process has in real memory
Environ string `json:"environ"` // environment for the process
Cwd string `json:"cwd"` // current working directory for the process
Cmdline string `json:"cmdline"` // complete command line for the process
}
ProcessStat contains process information. see: http://man7.org/linux/man-pages/man5/proc.5.html
Source Files
Directories
¶
| Path | Synopsis |
|---|---|
|
cmd
|
|
|
procs-tree
Command procs-tree displays the tree of children processes for a given PID.
|
Command procs-tree displays the tree of children processes for a given PID. |
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