X-Git-Url: http://git.iain.cx/?a=blobdiff_plain;f=nssm.cpp;h=43faa4143278f7d1d5a8c11d8cf540f345027892;hb=4b7c8eec508cc90d80355fad5df80163a181ddcb;hp=08b94320089fed2f3111081abd6dfc48e6a820e0;hpb=4440946eccf1cb14e16f8d29c54fb4acecbd44ff;p=nssm.git

diff --git a/nssm.cpp b/nssm.cpp
index 08b9432..43faa41 100644
--- a/nssm.cpp
+++ b/nssm.cpp
@@ -1,54 +1,144 @@
 #include "nssm.h"
 
-/* String function */
-int str_equiv(const char *a, const char *b) {
-  int i;
-  for (i = 0; ; i++) {
-    if (tolower(b[i]) != tolower(a[i])) return 0;
-    if (! a[i]) return 1;
-  }
+extern unsigned long tls_index;
+extern bool is_admin;
+extern imports_t imports;
+
+/* Are two strings case-insensitively equivalent? */
+int str_equiv(const TCHAR *a, const TCHAR *b) {
+  size_t len = _tcslen(a);
+  if (_tcslen(b) != len) return 0;
+  if (_tcsnicmp(a, b, len)) return 0;
+  return 1;
+}
+
+/* Convert a string to a number. */
+int str_number(const TCHAR *string, unsigned long *number) {
+  if (! string) return 1;
+
+  TCHAR *bogus;
+  *number = _tcstoul(string, &bogus, 0);
+  if (*bogus) return 2;
+
+  return 0;
+}
+
+/* Remove basename of a path. */
+void strip_basename(TCHAR *buffer) {
+  size_t len = _tcslen(buffer);
+  size_t i;
+  for (i = len; i && buffer[i] != _T('\\') && buffer[i] != _T('/'); i--);
+  /* X:\ is OK. */
+  if (i && buffer[i - 1] == _T(':')) i++;
+  buffer[i] = _T('\0');
 }
 
 /* How to use me correctly */
 int usage(int ret) {
-  fprintf(stderr, "NSSM: The non-sucking service manager\n");
-  fprintf(stderr, "Version %s, %s\n", NSSM_VERSION, NSSM_DATE);
-  fprintf(stderr, "Usage: nssm <option> [args]\n\n");
-  fprintf(stderr, "To show service installation GUI:\n\n");
-  fprintf(stderr, "        nssm install [<servicename>]\n\n");
-  fprintf(stderr, "To install a service without confirmation:\n\n");
-  fprintf(stderr, "        nssm install <servicename> <app> [<args>]\n\n");
-  fprintf(stderr, "To show service removal GUI:\n\n");
-  fprintf(stderr, "        nssm remove [<servicename>]\n\n");
-  fprintf(stderr, "To remove a service without confirmation:\n\n");
-  fprintf(stderr, "        nssm remove <servicename> confirm\n");
+  if (GetConsoleWindow()) print_message(stderr, NSSM_MESSAGE_USAGE, NSSM_VERSION, NSSM_DATE);
+  else popup_message(0, MB_OK, NSSM_MESSAGE_USAGE, NSSM_VERSION, NSSM_DATE);
   return(ret);
 }
 
-int main(int argc, char **argv) {
-  /* Require an argument since users may try to run nssm directly */
-  if (argc == 1) exit(usage(1));
+void check_admin() {
+  is_admin = false;
 
-  /* Valid commands are install or remove */
-  if (str_equiv(argv[1], "install")) {
-    exit(pre_install_service(argc - 2, argv + 2));
-  }
-  if (str_equiv(argv[1], "remove")) {
-    exit(pre_remove_service(argc - 2, argv + 2));
+  /* Lifted from MSDN examples */
+  PSID AdministratorsGroup;
+  SID_IDENTIFIER_AUTHORITY NtAuthority = SECURITY_NT_AUTHORITY;
+  if (! AllocateAndInitializeSid(&NtAuthority, 2, SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_ADMINS, 0, 0, 0, 0, 0, 0, &AdministratorsGroup)) return;
+  CheckTokenMembership(0, AdministratorsGroup, /*XXX*/(PBOOL) &is_admin);
+  FreeSid(AdministratorsGroup);
+}
+
+/* See if we were launched from a console window. */
+static void check_console() {
+  /* If we're running in a service context there will be no console window. */
+  HWND console = GetConsoleWindow();
+  if (! console) return;
+
+  unsigned long pid;
+  if (! GetWindowThreadProcessId(console, &pid)) return;
+
+  /*
+    If the process associated with the console window handle is the same as
+    this process, we were not launched from an existing console.  The user
+    probably double-clicked our executable.
+  */
+  if (GetCurrentProcessId() != pid) return;
+
+  /* We close our new console so that subsequent messages appear in a popup. */
+  FreeConsole();
+}
+
+int _tmain(int argc, TCHAR **argv) {
+  check_console();
+
+  /* Remember if we are admin */
+  check_admin();
+
+  /* Elevate */
+  if (argc > 1) {
+    /* Valid commands are install, edit, get, set, reset, unset or remove */
+    if (str_equiv(argv[1], _T("install"))) {
+      if (! is_admin) {
+        print_message(stderr, NSSM_MESSAGE_NOT_ADMINISTRATOR_CANNOT_INSTALL);
+        exit(100);
+      }
+      exit(pre_install_service(argc - 2, argv + 2));
+    }
+    if (str_equiv(argv[1], _T("edit")) || str_equiv(argv[1], _T("get")) || str_equiv(argv[1], _T("set")) || str_equiv(argv[1], _T("reset")) || str_equiv(argv[1], _T("unset"))) {
+      if (! is_admin) {
+        print_message(stderr, NSSM_MESSAGE_NOT_ADMINISTRATOR_CANNOT_EDIT);
+        exit(100);
+      }
+      int ret = pre_edit_service(argc - 1, argv + 1);
+      /* There might be a password here. */
+      for (int i = 0; i < argc; i++) SecureZeroMemory(argv[i], _tcslen(argv[i]) * sizeof(TCHAR));
+      exit(ret);
+    }
+    if (str_equiv(argv[1], _T("remove"))) {
+      if (! is_admin) {
+        print_message(stderr, NSSM_MESSAGE_NOT_ADMINISTRATOR_CANNOT_REMOVE);
+        exit(100);
+      }
+      exit(pre_remove_service(argc - 2, argv + 2));
+    }
   }
-  /* Undocumented: "run" is used to actually do service stuff */
-  if (! str_equiv(argv[1], NSSM_RUN)) exit(usage(2));
+
+  /* Thread local storage for error message buffer */
+  tls_index = TlsAlloc();
 
   /* Register messages */
-  create_messages();
+  if (is_admin) create_messages();
 
-  /* Start service magic */
-  SERVICE_TABLE_ENTRY table[] = { { NSSM, service_main }, { 0, 0 } };
-  if (! StartServiceCtrlDispatcher(table)) {
-    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_DISPATCHER_FAILED, GetLastError(), 0);
-    return 100;
+  /*
+    Optimisation for Windows 2000:
+    When we're run from the command line the StartServiceCtrlDispatcher() call
+    will time out after a few seconds on Windows 2000.  On newer versions the
+    call returns instantly.  Check for stdin first and only try to call the
+    function if there's no input stream found.  Although it's possible that
+    we're running with input redirected it's much more likely that we're
+    actually running as a service.
+    This will save time when running with no arguments from a command prompt.
+  */
+  if (_fileno(stdin) < 0) {
+    /* Set up function pointers. */
+    if (get_imports()) exit(111);
+
+    /* Start service magic */
+    SERVICE_TABLE_ENTRY table[] = { { NSSM, service_main }, { 0, 0 } };
+    if (! StartServiceCtrlDispatcher(table)) {
+      unsigned long error = GetLastError();
+      /* User probably ran nssm with no argument */
+      if (error == ERROR_FAILED_SERVICE_CONTROLLER_CONNECT) exit(usage(1));
+      log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_DISPATCHER_FAILED, error_string(error), 0);
+      free_imports();
+      exit(100);
+    }
   }
+  else exit(usage(1));
 
   /* And nothing more to do */
-  return 0;
+  exit(0);
 }