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package collector
import (
"fmt"
"regexp"
"strconv"
"strings"
)
// Mem key regex: "MemTotal: 12345 kB" -> MemTotal, 12345
var memRegex = regexp.MustCompile(`^([A-Za-z0-9_]+):\s*(\d+)`)
// ParseCPULine parses a /proc/stat line: "cpu 100 0 50 200 0 0 0 0 0 0" (name + 10 numbers).
// Older kernels may have fewer fields; missing ones are treated as 0.
func ParseCPULine(line string) (CPULine, error) {
fields := strings.Fields(line)
if len(fields) < 2 {
return CPULine{}, fmt.Errorf("cpu line too short: %q", line)
}
nums := make([]int64, 10)
for i := 1; i < len(fields) && i-1 < 10; i++ {
n, _ := strconv.ParseInt(fields[i], 10, 64)
nums[i-1] = n
}
return CPULine{
Name: fields[0],
User: nums[0],
Nice: nums[1],
System: nums[2],
Idle: nums[3],
Iowait: nums[4],
IRQ: nums[5],
SoftIRQ: nums[6],
Steal: nums[7],
Guest: nums[8],
GuestNice: nums[9],
}, nil
}
// ParseMemLine parses a /proc/meminfo line: "MemTotal: 123456 kB".
func ParseMemLine(line string) (MemLine, bool) {
m := memRegex.FindStringSubmatch(line)
if m == nil {
return MemLine{}, false
}
v, _ := strconv.ParseInt(m[2], 10, 64)
return MemLine{Key: m[1], Value: v}, true
}
// ParseNetLine parses a protocol net line: "eth0:b=0;tb=0;p=0;tp=0 e=0;te=0;d=0;td=0".
// There may be a space between first block (b,tb,p,tp) and second (e,te,d,td).
func ParseNetLine(line string) (NetLine, error) {
parts := strings.SplitN(line, ":", 2)
if len(parts) != 2 {
return NetLine{}, fmt.Errorf("net line missing colon: %q", line)
}
net := NetLine{Iface: strings.TrimSpace(parts[0])}
rest := strings.ReplaceAll(parts[1], " ", ";")
for _, pair := range strings.Split(rest, ";") {
kv := strings.SplitN(pair, "=", 2)
if len(kv) != 2 {
continue
}
k := strings.TrimSpace(kv[0])
v, _ := strconv.ParseInt(strings.TrimSpace(kv[1]), 10, 64)
switch k {
case "b":
net.B = v
case "tb":
net.Tb = v
case "p":
net.P = v
case "tp":
net.Tp = v
case "e":
net.E = v
case "te":
net.Te = v
case "d":
net.D = v
case "td":
net.Td = v
}
}
return net, nil
}
// ParseLoadAvg parses "1.0;0.5;0.2" into Load1, Load5, Load15.
func ParseLoadAvg(line string) LoadAvg {
parts := strings.SplitN(line, ";", 3)
l := LoadAvg{}
if len(parts) > 0 {
l.Load1 = strings.TrimSpace(parts[0])
}
if len(parts) > 1 {
l.Load5 = strings.TrimSpace(parts[1])
}
if len(parts) > 2 {
l.Load15 = strings.TrimSpace(parts[2])
}
return l
}
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