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|
package main
import (
"flag"
"fmt"
"os"
"golang.org/x/sys/unix"
)
const (
myName = "statvsfstat"
)
func main() {
flag.Usage = func() {
fmt.Fprintf(os.Stderr, "Usage: %s PATH\n", myName)
fmt.Fprintf(os.Stderr, "Dump the stat and fstat information for PATH to the console, JSON format.\n")
os.Exit(1)
}
flag.Parse()
if flag.NArg() != 1 {
flag.Usage()
}
path := flag.Arg(0)
var st unix.Stat_t
err := unix.Stat(path, &st)
if err != nil {
fmt.Fprintf(os.Stderr, "stat syscall returned error: %v\n", err)
os.Exit(4)
}
fd, err := unix.Open(path, unix.O_RDONLY, 0)
if err != nil {
fmt.Fprintf(os.Stderr, "open syscall returned error: %v\n", err)
os.Exit(3)
}
var fst unix.Stat_t
err = unix.Fstat(fd, &fst)
if err != nil {
fmt.Fprintf(os.Stderr, "fstat syscall returned error: %v\n", err)
os.Exit(2)
}
fmt.Printf("stat result: %#v\n", st)
fmt.Printf("fstat result: %#v\n", fst)
if st == fst {
fmt.Println("results are identical")
} else {
fmt.Println("results differ")
}
}
|
