vfs/vfs.go
2015-06-24 12:42:36 +09:00

101 lines
2.4 KiB
Go

/*
* Copyright (c) 2015 Alex Yatskov <alex@foosoft.net>
* Author: Alex Yatskov <alex@foosoft.net>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
package main
import (
"flag"
"fmt"
"log"
"os"
"bazil.org/fuse"
"bazil.org/fuse/fs"
// _ "bazil.org/fuse/fs/fstestutil"
)
func usage() {
fmt.Fprintf(os.Stderr, "Usage: %s [options] database [mountpoint]\n\n", os.Args[0])
fmt.Fprintf(os.Stderr, "Parameters:\n")
flag.PrintDefaults()
}
func main() {
version := flag.Uint("version", 0, "version index (0 for head)")
readonly := flag.Bool("readonly", false, "mount filesystem as readonly")
flag.Usage = usage
flag.Parse()
if flag.NArg() < 1 {
usage()
os.Exit(2)
}
mountable := flag.NArg() > 1
mutable := mountable && !*readonly && *version == 0
db, err := newDatabase(flag.Arg(0))
if err != nil {
log.Fatal(err)
}
if mutable {
if err := db.createNewVer(); err != nil {
log.Fatal(err)
}
}
if err := db.load(*version); err != nil {
log.Fatal(err)
}
if mountable {
var options []fuse.MountOption
if !mutable {
options = append(options, fuse.ReadOnly())
}
conn, err := fuse.Mount(flag.Arg(1), options...)
if err != nil {
log.Fatal(err)
}
defer conn.Close()
if err := fs.Serve(conn, db); err != nil {
log.Fatal(err)
}
<-conn.Ready
if err := conn.MountError; err != nil {
log.Fatal(err)
}
if mutable {
if err := db.save(); err != nil {
log.Fatal(err)
}
}
} else {
db.dump()
}
}