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package handlers
import (
"context"
"fmt"
"io/ioutil"
"os"
"os/exec"
"strings"
"time"
"github.com/mimecast/dtail/internal/config"
"github.com/mimecast/dtail/internal/io/logger"
"github.com/mimecast/dtail/internal/io/run"
)
type runCommand struct {
server *ServerHandler
run run.Run
}
func newRunCommand(server *ServerHandler) runCommand {
return runCommand{
server: server,
}
}
func (r runCommand) Start(ctx context.Context, argc int, args []string) {
if argc < 2 {
r.server.sendServerMessage(logger.Warn(r.server.user, commandParseWarning, args, argc))
return
}
command := strings.Join(args[1:], " ")
if strings.Contains(command, ";") {
r.startScript(ctx, command)
return
}
r.start(ctx, strings.TrimSpace(command))
}
func (r runCommand) startScript(ctx context.Context, script string) {
if _, err := os.Stat(config.Common.TmpDir); os.IsNotExist(err) {
logger.Error(r.server.user, err)
r.server.sendServerMessage(logger.Error(r.server.user, "Unable to execute command(s), check server logs"))
return
}
timestamp := time.Now().UnixNano()
scriptPath := fmt.Sprintf("%s/%s_%v.sh", config.Common.TmpDir, r.server.user.Name, timestamp)
// TODO: On dserver startup delete all previously written scripts (there might be left overs due to a crash or so)
logger.Debug(r.server.user, "Writing temp script", scriptPath)
script = fmt.Sprintf("#!/bin/sh\n%s", script)
if err := ioutil.WriteFile(scriptPath, []byte(script), 0700); err != nil {
logger.Error(r.server.user, err)
r.server.sendServerMessage(logger.Error(r.server.user, "Unable to execute command(s), check server logs"))
return
}
r.start(ctx, scriptPath)
os.Remove(scriptPath)
}
func (r runCommand) start(ctx context.Context, command string) {
if len(command) == 0 {
return
}
splitted := strings.Split(command, " ")
path := splitted[0]
args := splitted[1:]
qualifiedPath, err := exec.LookPath(path)
if err != nil {
logger.Error(r.server.user, err)
r.server.sendServerMessage(logger.Error(r.server.user, "Unable to execute command(s), check server logs"))
r.server.sendServerMessage(".run exitstatus 255")
return
}
if !r.server.user.HasFilePermission(qualifiedPath, "runcommands") {
logger.Error(r.server.user, "No permission to execute path", qualifiedPath)
r.server.sendServerMessage(logger.Error(r.server.user, "Unable to execute command(s), check server logs"))
r.server.sendServerMessage(".run exitstatus 255")
return
}
r.run = run.New(qualifiedPath, args)
pid, ec, _ := r.run.Start(ctx, r.server.lines)
r.server.sendServerMessage(fmt.Sprintf(".run exitstatus %d", ec))
r.server.sendServerMessage(logger.Info(fmt.Sprintf("Process %d exited with status %d", pid, ec)))
}
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