X-Git-Url: http://git.iain.cx/?a=blobdiff_plain;f=nssm.cpp;h=4203c6156afc758f1746365a442b1c70b5cc081f;hb=b99cfc38fcf4fbf5c87e23f93a02d1d6a6d931ca;hp=2933dea9c4956d964fe4e5346872d9de0597146a;hpb=13a14267e612fb6a28ddef57f30f9de2685fc2ff;p=nssm.git

diff --git a/nssm.cpp b/nssm.cpp
index 2933dea..4203c61 100644
--- a/nssm.cpp
+++ b/nssm.cpp
@@ -27,10 +27,34 @@ int usage(int ret) {
   return(ret);
 }
 
+int check_admin(char *action) {
+  /* Lifted from MSDN examples */
+  PSID AdministratorsGroup;
+  SID_IDENTIFIER_AUTHORITY NtAuthority = SECURITY_NT_AUTHORITY;
+  BOOL ok = AllocateAndInitializeSid(&NtAuthority, 2, SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_ADMINS, 0, 0, 0, 0, 0, 0, &AdministratorsGroup);
+  if (ok) {
+    if (! CheckTokenMembership(0, AdministratorsGroup, &ok)) ok = 0;
+    FreeSid(AdministratorsGroup);
+
+    if (ok) return 0;
+
+    fprintf(stderr, "Administator access is needed to %s a service.\n", action);
+    return 1;
+  }
+
+  /* Can't tell if we are admin or not; later operations may fail */
+  return 0;
+}
+
 int main(int argc, char **argv) {
   /* Require an argument since users may try to run nssm directly */
   if (argc == 1) exit(usage(1));
 
+  /* Elevate */
+  if (str_equiv(argv[1], "install") || str_equiv(argv[1], "remove")) {
+    if (check_admin(argv[1])) exit(100);
+  }
+
   /* Valid commands are install or remove */
   if (str_equiv(argv[1], "install")) {
     exit(pre_install_service(argc - 2, argv + 2));