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