54 lines
1023 B
Go
54 lines
1023 B
Go
package main
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import (
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"flag"
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"fmt"
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"os"
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"golang.org/x/sys/unix"
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)
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const (
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myName = "statvsfstat"
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)
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func main() {
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flag.Usage = func() {
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fmt.Fprintf(os.Stderr, "Usage: %s PATH\n", myName)
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fmt.Fprintf(os.Stderr, "Dump the stat and fstat information for PATH to the console, JSON format.\n")
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os.Exit(1)
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}
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flag.Parse()
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if flag.NArg() != 1 {
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flag.Usage()
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}
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path := flag.Arg(0)
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var st unix.Stat_t
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err := unix.Stat(path, &st)
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if err != nil {
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fmt.Fprintf(os.Stderr, "stat syscall returned error: %v\n", err)
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os.Exit(4)
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}
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fd, err := unix.Open(path, unix.O_RDONLY, 0)
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if err != nil {
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fmt.Fprintf(os.Stderr, "open syscall returned error: %v\n", err)
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os.Exit(3)
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}
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var fst unix.Stat_t
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err = unix.Fstat(fd, &fst)
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if err != nil {
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fmt.Fprintf(os.Stderr, "fstat syscall returned error: %v\n", err)
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os.Exit(2)
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}
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fmt.Printf("stat result: %#v\n", st)
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fmt.Printf("fstat result: %#v\n", fst)
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if st == fst {
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fmt.Println("results are identical")
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} else {
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fmt.Println("results differ")
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}
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}
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