hardcoresushi/libgocryptfs
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gocryptfs-xray: show full usage text on flag parse error

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This commit is contained in:
Jakob Unterwurzacher 2019-04-09 21:23:17 +02:00
parent cc0a603ef8
commit dcd1068517
1 changed files with 13 additions and 8 deletions
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21
gocryptfs-xray/xray_main.go
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@ -38,19 +38,24 @@ func prettyPrintHeader(h *contentenc.FileHeader, aessiv bool) {
fmt.Printf(msg+"\n", h.Version, id) fmt.Printf(msg+"\n", h.Version, id)
} }
func usage() {
fmt.Fprintf(os.Stderr, "Usage: %s [OPTIONS] FILE\n"+
"\n"+
"Options:\n", myName)
flag.PrintDefaults()
fmt.Fprintf(os.Stderr, "\n"+
"Examples:\n"+
" gocryptfs-xray myfs/mCXnISiv7nEmyc0glGuhTQ\n"+
" gocryptfs-xray -dumpmasterkey myfs/gocryptfs.conf\n")
}
func main() { func main() {
dumpmasterkey := flag.Bool("dumpmasterkey", false, "Decrypt and dump the master key") dumpmasterkey := flag.Bool("dumpmasterkey", false, "Decrypt and dump the master key")
aessiv := flag.Bool("aessiv", false, "Assume AES-SIV mode instead of AES-GCM") aessiv := flag.Bool("aessiv", false, "Assume AES-SIV mode instead of AES-GCM")
flag.Usage = usage
flag.Parse() flag.Parse()
if flag.NArg() != 1 { if flag.NArg() != 1 {
fmt.Fprintf(os.Stderr, "Usage: %s [OPTIONS] FILE\n"+ usage()
"\n"+
"Options:\n", myName)
flag.PrintDefaults()
fmt.Fprintf(os.Stderr, "\n"+
"Examples:\n"+
" gocryptfs-xray myfs/mCXnISiv7nEmyc0glGuhTQ\n"+
" gocryptfs-xray -dumpmasterkey myfs/gocryptfs.conf\n")
os.Exit(1) os.Exit(1)
} }
fn := flag.Arg(0) fn := flag.Arg(0)