53 lines
1.1 KiB
Go
53 lines
1.1 KiB
Go
|
package procfs
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
"io/ioutil"
|
||
|
|
"os"
|
||
|
|
)
|
||
|
|
|
||
|
|
// ProcIO models the content of /proc/<pid>/io.
|
||
|
|
type ProcIO struct {
|
||
|
|
// Chars read.
|
||
|
|
RChar uint64
|
||
|
|
// Chars written.
|
||
|
|
WChar uint64
|
||
|
|
// Read syscalls.
|
||
|
|
SyscR uint64
|
||
|
|
// Write syscalls.
|
||
|
|
SyscW uint64
|
||
|
|
// Bytes read.
|
||
|
|
ReadBytes uint64
|
||
|
|
// Bytes written.
|
||
|
|
WriteBytes uint64
|
||
|
|
// Bytes written, but taking into account truncation. See
|
||
|
|
// Documentation/filesystems/proc.txt in the kernel sources for
|
||
|
|
// detailed explanation.
|
||
|
|
CancelledWriteBytes int64
|
||
|
|
}
|
||
|
|
|
||
|
|
// NewIO creates a new ProcIO instance from a given Proc instance.
|
||
|
|
func (p Proc) NewIO() (ProcIO, error) {
|
||
|
|
pio := ProcIO{}
|
||
|
|
|
||
|
|
f, err := os.Open(p.path("io"))
|
||
|
|
if err != nil {
|
||
|
|
return pio, err
|
||
|
|
}
|
||
|
|
defer f.Close()
|
||
|
|
|
||
|
|
data, err := ioutil.ReadAll(f)
|
||
|
|
if err != nil {
|
||
|
|
return pio, err
|
||
|
|
}
|
||
|
|
|
||
|
|
ioFormat := "rchar: %d\nwchar: %d\nsyscr: %d\nsyscw: %d\n" +
|
||
|
|
"read_bytes: %d\nwrite_bytes: %d\n" +
|
||
|
|
"cancelled_write_bytes: %d\n"
|
||
|
|
|
||
|
|
_, err = fmt.Sscanf(string(data), ioFormat, &pio.RChar, &pio.WChar, &pio.SyscR,
|
||
|
|
&pio.SyscW, &pio.ReadBytes, &pio.WriteBytes, &pio.CancelledWriteBytes)
|
||
|
|
|
||
|
|
return pio, err
|
||
|
|
}
|