Initial commit

.gitignore

@@ -0,0 +1,2 @@
+alrm
+*.swp

main.go

@@ -0,0 +1,103 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"bufio"
+	"strings"
+	"unicode/utf8"
+)
+
+func main(){
+	if len(os.Args) < 2 {
+		fmt.Fprintf(os.Stderr, "filename required\n")
+		os.Exit(1)
+	}
+
+	file, err := os.Open(os.Args[1])
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "cannot open %s: %s\n",
+			os.Args[1], err.Error())
+		os.Exit(1)
+	}
+	defer file.Close()
+
+	lscan := bufio.NewScanner(file)
+	lscan.Split(bufio.ScanLines)
+	for lscan.Scan() {
+		line := lscan.Text()
+		// Ignore comments
+		if len(line) < 1 || line[0] == '#' {
+			continue
+		}
+
+		wscan := bufio.NewScanner(strings.NewReader(line))
+		wscan.Split(ScanWords)
+		for wscan.Scan() {
+			word := wscan.Text()
+			fmt.Printf("[%s] ", word)
+		}
+	}
+	fmt.Printf("\n")
+}
+
+func ScanWords(data []byte, atEOF bool) (int, []byte, error) {
+	start := 0
+	quote := int32(0)
+	for start < len(data) {
+		r, w := utf8.DecodeRune(data[start:])
+		if !isSpace(r) {
+			if isQuote(r) {
+				quote = r
+				start += w
+			}
+			break
+		}
+		start += w
+	}
+
+	for i := start; i < len(data); {
+		r, w := utf8.DecodeRune(data[i:])
+
+		if (quote > 0 && quote == r) || (quote == 0 && isSpace(r)) {
+			return i + w, data[start:i], nil
+		}
+
+		i += w
+	}
+
+	if atEOF && len(data) > start {
+		return len(data), data[start:], nil
+	}
+	return start, nil, nil
+}
+
+func isQuote(r rune) bool {
+	switch r {
+		case '\u0022', '\u0027':
+			return true
+	}
+	return false
+}
+
+func isSpace(r rune) bool {
+	if r <= '\u00FF' {
+		switch r {
+			case ' ', '\t', '\n', '\v', '\f', '\r':
+				return true
+			case '\u0085', '\u00A0':
+				return true
+		}
+		return false
+	}
+
+	if '\u2000' <= r && r <= '\u200a' {
+		return true
+	}
+
+	switch r {
+		case '\u1680', '\u2028', '\u2029', '\u202f', '\u205f', '\u3000':
+		return true
+	}
+	return false
+}

sample.config

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+set alert
+
+monitor group
+	host www1.example.com address 10.11.135.101
+		# check allows for a check using a host/address
+		check ping
+	host www2.example.com address 10.11.135.102
+		check ping
+
+# Address is optional, derived from host
+monitor host monkey.com