ref: f54501c2592bd7cee283a243391d07f2dd131373
dir: /filecon/filecon.go/
package main
import (
"bufio"
"fmt"
"io"
"log"
"os"
)
func usage() {
fmt.Printf("filecon [-v] filename")
os.Exit(1)
}
func main() {
var fn string
var verbose bool
args := append([]string{}, os.Args[1:]...)
if len(args) == 0 {
usage()
}
for len(args) > 0 {
var arg string
arg, args = args[0], args[1:]
if arg == "-v" {
verbose = true
} else {
fn = arg
}
}
if verbose {
log.Printf("opening %v...", fn)
}
f, err := os.OpenFile(fn, os.O_RDWR|os.O_CREATE, 0666)
if err != nil {
log.Fatalf("%v", err)
}
defer f.Close()
r := bufio.NewReader(f)
rr := bufio.NewReader(os.Stdin)
for {
l, err := rr.ReadString('\n')
if err != nil {
log.Fatalf("%v", err)
}
if verbose {
log.Printf("send '%v'\n", l)
}
fmt.Fprintf(f, "%v\n", l)
l, err = r.ReadString('\n')
if err == io.EOF {
break
} else if err != nil {
log.Fatalf("%v", err)
}
if verbose {
log.Printf("filecon: received '%v'.", l)
} else {
fmt.Printf(l)
}
}
}