main: rename "-f" to "-fg"

"-f" looks too much like "--force". The old variant is still
accepted for compatability.

Documentation/MANPAGE.md

@@ -56,8 +56,9 @@ Options:
 	stripped by gocryptfs. Using something like "cat /mypassword.txt" allows
 	to mount the gocryptfs filesytem without user interaction.
 
-**-f**
+**-fg, -f**
 :	Stay in the foreground instead of forking away. Implies "-nosyslog".
+	For compatability, "-f" is also accepted, but "-fg" is preferred.
 
 **-fusedebug**
 :	Enable fuse library debug output

cli_args.go

@@ -14,7 +14,7 @@ import (
 
 // argContainer stores the parsed CLI options and arguments
 type argContainer struct {
-	debug, init, zerokey, fusedebug, openssl, passwd, foreground, version,
+	debug, init, zerokey, fusedebug, openssl, passwd, fg, version,
 	plaintextnames, quiet, nosyslog, wpanic,
 	longnames, allow_other, ro, reverse, aessiv, nonempty, raw64 bool
 	masterkey, mountpoint, cipherdir, cpuprofile, extpass,
@@ -89,7 +89,8 @@ func parseCliOpts() (args argContainer) {
 	// Tri-state true/false/auto
 	flagSet.StringVar(&opensslAuto, "openssl", "auto", "Use OpenSSL instead of built-in Go crypto")
 	flagSet.BoolVar(&args.passwd, "passwd", false, "Change password")
-	flagSet.BoolVar(&args.foreground, "f", false, "Stay in the foreground")
+	flagSet.BoolVar(&args.fg, "f", false, "")
+	flagSet.BoolVar(&args.fg, "fg", false, "Stay in the foreground")
 	flagSet.BoolVar(&args.version, "version", false, "Print version and exit")
 	flagSet.BoolVar(&args.plaintextnames, "plaintextnames", false, "Do not encrypt file names")
 	flagSet.BoolVar(&args.quiet, "q", false, "")

daemonize.go

@@ -24,7 +24,7 @@ func exitOnUsr1() {
 func forkChild() int {
 	go exitOnUsr1()
 	name := os.Args[0]
-	newArgs := []string{"-f", fmt.Sprintf("-notifypid=%d", os.Getpid())}
+	newArgs := []string{"-fg", fmt.Sprintf("-notifypid=%d", os.Getpid())}
 	newArgs = append(newArgs, os.Args[1:]...)
 	c := exec.Command(name, newArgs...)
 	c.Stdout = os.Stdout

main.go

@@ -126,7 +126,7 @@ func main() {
 	args := parseCliOpts()
 	// Fork a child into the background if "-f" is not set AND we are mounting
 	// a filesystem. The child will do all the work.
-	if !args.foreground && flagSet.NArg() == 2 {
+	if !args.fg && flagSet.NArg() == 2 {
 		ret := forkChild()
 		os.Exit(ret)
 	}