forked from keybase/client
/
cmd_simplefs_write.go
155 lines (132 loc) · 3.11 KB
/
cmd_simplefs_write.go
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// Copyright 2015 Keybase, Inc. All rights reserved. Use of
// this source code is governed by the included BSD license.
package client
import (
"bufio"
"fmt"
"io"
"os"
"golang.org/x/net/context"
"github.com/keybase/cli"
"github.com/keybase/client/go/libcmdline"
"github.com/keybase/client/go/libkb"
keybase1 "github.com/keybase/client/go/protocol/keybase1"
)
const writeBufSizeDefault = 1600
// CmdSimpleFSWrite is the 'fs write' command.
type CmdSimpleFSWrite struct {
libkb.Contextified
path keybase1.Path
flags keybase1.OpenFlags
offset int64
bufSize int
}
// NewCmdSimpleFSWrite creates a new cli.Command.
func NewCmdSimpleFSWrite(cl *libcmdline.CommandLine, g *libkb.GlobalContext) cli.Command {
return cli.Command{
Name: "write",
ArgumentHelp: "<path>",
Usage: "write input to file",
Action: func(c *cli.Context) {
cl.ChooseCommand(&CmdSimpleFSWrite{Contextified: libkb.NewContextified(g)}, "write", c)
cl.SetNoStandalone()
},
Flags: []cli.Flag{
cli.BoolFlag{
Name: "a, append",
Usage: "add to existing file",
},
cli.IntFlag{
Name: "b, buffersize",
Value: writeBufSizeDefault,
Usage: "write buffer size",
},
},
}
}
// Run runs the command in client/server mode.
func (c *CmdSimpleFSWrite) Run() error {
cli, err := GetSimpleFSClient(c.G())
if err != nil {
return err
}
ctx := context.TODO()
opid, err := cli.SimpleFSMakeOpid(ctx)
if err != nil {
return err
}
// if we're appending, we'll need the size
if c.flags&keybase1.OpenFlags_APPEND != 0 {
e, err := cli.SimpleFSStat(context.TODO(), c.path)
if err != nil {
return err
}
c.offset = int64(e.Size)
}
err = cli.SimpleFSOpen(context.TODO(), keybase1.SimpleFSOpenArg{
OpID: opid,
Dest: c.path,
Flags: c.flags,
})
if err != nil {
return err
}
defer cli.SimpleFSClose(context.TODO(), opid)
buf := make([]byte, 0, c.bufSize)
r := bufio.NewReader(os.Stdin)
for {
n, err := r.Read(buf[:cap(buf)])
buf = buf[:n]
if n == 0 {
if err == nil {
continue
}
if err == io.EOF {
break
}
}
err2 := cli.SimpleFSWrite(context.TODO(), keybase1.SimpleFSWriteArg{
OpID: opid,
Offset: c.offset,
Content: buf[:],
})
if err2 != nil {
err = err2
break
}
c.offset += int64(n)
if err != nil {
if err == io.EOF {
err = nil
}
break
}
}
c.G().Log.Debug("SimpleFS: return with error %v", err)
return err
}
// ParseArgv gets the arguments for this command.
func (c *CmdSimpleFSWrite) ParseArgv(ctx *cli.Context) error {
nargs := len(ctx.Args())
var err error
c.bufSize = ctx.Int("buffersize")
if ctx.Bool("append") {
c.flags = keybase1.OpenFlags_WRITE | keybase1.OpenFlags_APPEND | keybase1.OpenFlags_EXISTING
} else {
c.flags = keybase1.OpenFlags_WRITE | keybase1.OpenFlags_REPLACE
}
if nargs == 1 {
c.path = makeSimpleFSPath(c.G(), ctx.Args()[0])
} else {
err = fmt.Errorf("write requires a path argument")
}
return err
}
// GetUsage says what this command needs to operate.
func (c *CmdSimpleFSWrite) GetUsage() libkb.Usage {
return libkb.Usage{
Config: true,
KbKeyring: true,
API: true,
}
}