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Streamlined procfile reading code to reduce number of required syscalls. This makes it easier to catch short lived processes.

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This commit is contained in:
Karim Kanso
2020-03-10 15:48:56 +00:00
parent a8b29b4527
commit d09e302cbf
3 changed files with 324 additions and 180 deletions
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4
cmd/root.go
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@@ -62,6 +62,7 @@ var triggerInterval int
var colored bool
var debug bool
var ppid bool
var cmdLength int
func init() {
rootCmd.PersistentFlags().BoolVarP(&logPS, "procevents", "p", true, "print new processes to stdout")
@@ -72,6 +73,7 @@ func init() {
rootCmd.PersistentFlags().BoolVarP(&colored, "color", "c", true, "color the printed events")
rootCmd.PersistentFlags().BoolVarP(&debug, "debug", "", false, "print detailed error messages")
rootCmd.PersistentFlags().BoolVarP(&ppid, "ppid", "", false, "record process ppids")
rootCmd.PersistentFlags().IntVarP(&cmdLength, "truncate", "t", 2048, "truncate process cmds longer than this")
log.SetOutput(os.Stdout)
}
@@ -93,7 +95,7 @@ func root(cmd *cobra.Command, args []string) {
fsw := fswatcher.NewFSWatcher()
defer fsw.Close()
pss := psscanner.NewPSScanner(ppid)
pss := psscanner.NewPSScanner(ppid, cmdLength)
sigCh := make(chan os.Signal)
signal.Notify(sigCh, syscall.SIGHUP, syscall.SIGINT, syscall.SIGTERM, syscall.SIGQUIT)