121 lines
3.2 KiB
Go
121 lines
3.2 KiB
Go
package main
|
|
|
|
import (
|
|
"flag"
|
|
"fmt"
|
|
"io"
|
|
"os"
|
|
"os/exec"
|
|
"strconv"
|
|
)
|
|
|
|
import (
|
|
"mailq-inspector/mailq"
|
|
)
|
|
|
|
var settings = make(map[string]string)
|
|
|
|
func main() {
|
|
parseArguments()
|
|
if settings["interactive"] == "false" {
|
|
showQueue(defaultSortConfig())
|
|
}
|
|
if settings["interactive"] == "true" {
|
|
interactiveShell(os.Stdin, os.Stdout)
|
|
}
|
|
}
|
|
|
|
func parseArguments() {
|
|
mailqCommandPtr := flag.String("mailqCommand", "mailq", "Command to use for getting mailq output")
|
|
mailqCommandArgsPtr := flag.String("mailqCommandArgs", "", "Optional arguments to pass to mailqCommand")
|
|
interactivePtr := flag.Bool("interactive", false, "Set to true for shell mode")
|
|
outputFormatPtr := flag.String("outputFormat", "human", "Available output formats: \"human\", \"machine\", \"json\"")
|
|
usePagerPtr := flag.Bool("usePager", true, "Use pager to display output?")
|
|
flag.Parse()
|
|
settings["mailqCommand"] = *mailqCommandPtr
|
|
settings["mailqCommandArgs"] = *mailqCommandArgsPtr
|
|
settings["interactive"] = strconv.FormatBool(*interactivePtr)
|
|
settings["outputFormat"] = *outputFormatPtr
|
|
settings["usePager"] = strconv.FormatBool(*usePagerPtr)
|
|
}
|
|
|
|
func defaultSortConfig() mailq.QEntrySortConfig {
|
|
sortConfig := mailq.NewSortConfig()
|
|
sortConfig, _ = sortConfig.By("Status", "ASC")
|
|
sortConfig, _ = sortConfig.By("Sender", "ASC")
|
|
sortConfig, _ = sortConfig.By("Recipients", "DESC")
|
|
return sortConfig
|
|
}
|
|
|
|
func showQueue(sortConfig mailq.QEntrySortConfig) {
|
|
queue, err := fetchQueue()
|
|
if err != nil {
|
|
fmt.Printf("Could not fetch queue entries: %s\n", err.Error())
|
|
os.Exit(1)
|
|
}
|
|
queue.Sort(sortConfig)
|
|
displayQueue(queue)
|
|
}
|
|
|
|
func displayQueue(queue mailq.MailQ) {
|
|
if settings["usePager"] == "true" {
|
|
pagerReader, pagerWriter := io.Pipe()
|
|
pagerDone := make(chan bool)
|
|
go launchPager(pagerReader, pagerDone)
|
|
printQueue(queue, pagerWriter)
|
|
pagerWriter.Close()
|
|
// Wait for pager to be closed before continuing the main program
|
|
<-pagerDone
|
|
} else {
|
|
printQueue(queue, os.Stdout)
|
|
}
|
|
}
|
|
|
|
func printQueue(queue mailq.MailQ, writer io.Writer) {
|
|
if settings["outputFormat"] == "human" {
|
|
queue.WriteHumanReadable(writer)
|
|
} else if settings["outputFormat"] == "machine" {
|
|
queue.WriteMachineReadable(writer)
|
|
} else if settings["outputFormat"] == "json" {
|
|
queue.WriteJSON(writer)
|
|
}
|
|
}
|
|
|
|
func launchPager(reader *io.PipeReader, pagerDone chan<- bool) {
|
|
cmd := exec.Command("less", "--chop-long-lines")
|
|
cmd.Stdin = reader
|
|
cmd.Stdout = os.Stdout
|
|
if err := cmd.Start(); err != nil {
|
|
fmt.Printf("Error launching pager: %s\n", err.Error())
|
|
}
|
|
if err := cmd.Wait(); err != nil {
|
|
fmt.Printf("Error terminating pager: %s\n", err.Error())
|
|
} else {
|
|
reader.Close()
|
|
pagerDone <- true
|
|
}
|
|
}
|
|
|
|
func fetchQueue() (mailq.MailQ, error) {
|
|
if settings["mailqCommandArgs"] == "" {
|
|
return readFromCmd(exec.Command(settings["mailqCommand"]))
|
|
} else {
|
|
return readFromCmd(exec.Command(settings["mailqCommand"], settings["mailqCommandArgs"]))
|
|
}
|
|
}
|
|
|
|
func readFromCmd(cmd *exec.Cmd) (mailq.MailQ, error) {
|
|
stdout, err := cmd.StdoutPipe()
|
|
if err != nil {
|
|
return mailq.MailQ{}, err
|
|
}
|
|
if err := cmd.Start(); err != nil {
|
|
return mailq.MailQ{}, err
|
|
}
|
|
result, resultError := mailq.ParseFromReader(stdout)
|
|
if err := cmd.Wait(); err != nil {
|
|
return mailq.MailQ{}, err
|
|
}
|
|
return result, resultError
|
|
}
|