Copied target now gets the owner chown.

main.go

@@ -10,6 +10,8 @@ import (
   "time"
   "path"
   "path/filepath"
+  "os/user"
+  "strconv"
 )
 
 type Cert struct {
@@ -86,7 +88,29 @@ func ParseOpts() Config {
   return LoadConfig(config_file)
 }
 
-func Copy(from string, to string) {
+func ChownTarget(fname string, owner string) {
+  u, err := user.Lookup(owner)
+  if err != nil {
+    log.Fatalf("failed to find owner %s: %v", fname, err)
+  }
+
+  uid, err := strconv.Atoi(u.Uid)
+  if err != nil {
+    log.Fatalf("UID %s gives bad result when calling user.Lookup()", u.Uid)
+  }
+
+  gid, err := strconv.Atoi(u.Gid)
+  if err != nil {
+    log.Fatalf("GID %s gives bad result when calling user.Lookup()", u.Gid)
+  }
+
+  err = os.Chown(fname, uid, gid) 
+  if err != nil {
+    log.Fatalf("Error cannot chown file %s to user %s: %v", fname, owner, err)
+  }
+}
+
+func Copy(from string, to string, owner string) {
   log.Println("copying from=", from, "to=", to)
 
   src, err := os.Open(from)
@@ -99,6 +123,8 @@ func Copy(from string, to string) {
 
   _, err = io.Copy(dst, src)
 
+  ChownTarget(to, owner)
+
   if err != nil {
     log.Fatalf("failed to copy: %v", err)
   }
@@ -106,11 +132,10 @@ func Copy(from string, to string) {
 
 func (cfg *Config) SyncCerts() {
   log.Println("SYNC CERTS CALLED")
-  // copy the files
-  Copy(cfg.Source.PrivateKey, cfg.Target.PrivateKey)
-  Copy(cfg.Source.PublicKey, cfg.Target.PublicKey)
+  // copy the files, also changes ownership of target
+  Copy(cfg.Source.PrivateKey, cfg.Target.PrivateKey, cfg.Target.Owner)
+  Copy(cfg.Source.PublicKey, cfg.Target.PublicKey, cfg.Target.Owner)
 
-  // change the ownership
   // restart the service
 }