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package hook
import (
"log"
"os"
"os/exec"
"strings"
"github.com/coredns/caddy"
)
// Hook executes a command.
func (cfg *Config) Hook(event caddy.EventName, info interface{}) error {
if event != cfg.Event {
return nil
}
nonblock := false
if len(cfg.Args) >= 1 && cfg.Args[len(cfg.Args)-1] == "&" {
// Run command in background; non-blocking
nonblock = true
cfg.Args = cfg.Args[:len(cfg.Args)-1]
}
// Execute command.
cmd := exec.Command(cfg.Command, cfg.Args...)
cmd.Stdin = os.Stdin
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
if nonblock {
log.Printf("[INFO] Nonblocking Command \"%s %s\" with ID %s", cfg.Command, strings.Join(cfg.Args, " "), cfg.ID)
return cmd.Start()
}
log.Printf("[INFO] Blocking Command \"%s %s\" with ID %s", cfg.Command, strings.Join(cfg.Args, " "), cfg.ID)
err := cmd.Run()
if err != nil {
return err
}
return nil
}
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