54 lines
1.4 KiB
Go
54 lines
1.4 KiB
Go
package procfs
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import (
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"fmt"
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"io/ioutil"
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)
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// Proc contains process information obtained from /proc/stat
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// Its fields are documented using PROC(5) man page
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type ProcStat struct {
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Cpu struct {
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User uint64 // Time spent in user mode
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Nice uint64 // Time spent in user mode with low priority (nice)
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System uint64 // Time spent in system mode
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Idle uint64 // Time spent in the idle task
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Iowait uint64 // Time waiting for I/O to complete
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Irq uint64 // Time servicing interrupts
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Softirq uint64 // Time servicing softirqs
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// Stolen time, which is the time spent in other operating systems when
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// running in a virtualized environment
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Steal uint64
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// Time spent running a virtual CPU for guest operating systems under
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// the control of the Linux kernel.
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Guest uint64
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// Time spent running a niced guest (virtual CPU for guest operating
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// systems under the control of the Linux kernel)
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GuestNice uint64
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}
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}
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func NewProcStat() ProcStat {
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file := fmt.Sprintf("/proc/stat")
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bytes, err := ioutil.ReadFile(file)
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if err != nil {
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panic(err)
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}
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p := ProcStat{}
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parsed, err := fmt.Sscanf(string(bytes), "cpu %d %d %d %d %d %d %d %d %d %d",
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&p.Cpu.User, &p.Cpu.Nice, &p.Cpu.System, &p.Cpu.Idle, &p.Cpu.Iowait,
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&p.Cpu.Irq, &p.Cpu.Softirq, &p.Cpu.Steal, &p.Cpu.Guest,
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&p.Cpu.GuestNice)
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if parsed < 10 {
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fmt.Println("Managed to parse only", parsed, "fields out of 10")
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}
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if err != nil {
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panic(err)
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}
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return p
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}
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