Fake stdin for applications which exit on EOF.

[nssm.git] / io.cpp

diff --git a/io.cpp b/io.cpp
index d18e31c..a4f6abb 100644 (file)
--- a/io.cpp
+++ b/io.cpp
@@ -250,21 +250,6 @@ int get_output_handles(nssm_service_t *service, HKEY key, STARTUPINFO *si) {
   ZeroMemory(&attributes, sizeof(attributes));\r
   attributes.bInheritHandle = true;\r
 \r
-  /* stdin */\r
-  if (get_createfile_parameters(key, NSSM_REG_STDIN, service->stdin_path, &service->stdin_sharing, NSSM_STDIN_SHARING, &service->stdin_disposition, NSSM_STDIN_DISPOSITION, &service->stdin_flags, NSSM_STDIN_FLAGS)) {\r
-    service->stdin_sharing = service->stdin_disposition = service->stdin_flags = 0;\r
-    ZeroMemory(service->stdin_path, _countof(service->stdin_path) * sizeof(TCHAR));\r
-    return 1;\r
-  }\r
-  if (si && service->stdin_path[0]) {\r
-    si->hStdInput = CreateFile(service->stdin_path, FILE_READ_DATA, service->stdin_sharing, &attributes, service->stdin_disposition, service->stdin_flags, 0);\r
-    if (! si->hStdInput) {\r
-      log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATEFILE_FAILED, service->stdin_path, error_string(GetLastError()), 0);\r
-      return 2;\r
-    }\r
-    set_flags = true;\r
-  }\r
-\r
   /* stdout */\r
   if (get_createfile_parameters(key, NSSM_REG_STDOUT, service->stdout_path, &service->stdout_sharing, NSSM_STDOUT_SHARING, &service->stdout_disposition, NSSM_STDOUT_DISPOSITION, &service->stdout_flags, NSSM_STDOUT_FLAGS)) {\r
     service->stdout_sharing = service->stdout_disposition = service->stdout_flags = 0;\r
@@ -346,6 +331,50 @@ int get_output_handles(nssm_service_t *service, HKEY key, STARTUPINFO *si) {
     }\r
   }\r
 \r
+  /* stdin */\r
+  if (get_createfile_parameters(key, NSSM_REG_STDIN, service->stdin_path, &service->stdin_sharing, NSSM_STDIN_SHARING, &service->stdin_disposition, NSSM_STDIN_DISPOSITION, &service->stdin_flags, NSSM_STDIN_FLAGS)) {\r
+    service->stdin_sharing = service->stdin_disposition = service->stdin_flags = 0;\r
+    ZeroMemory(service->stdin_path, _countof(service->stdin_path) * sizeof(TCHAR));\r
+    return 1;\r
+  }\r
+  if (si && service->stdin_path[0]) {\r
+    if (str_equiv(service->stdin_path, _T("|"))) {\r
+      /* Fake stdin with a pipe. */\r
+      if (set_flags) {\r
+        /*\r
+          None of this is necessary if we aren't redirecting stdout and/or\r
+          stderr as well.\r
+\r
+          If we don't redirect any handles the application will start and be\r
+          quite happy with its console.  If we start it with\r
+          STARTF_USESTDHANDLES set it will interpret a NULL value for\r
+          hStdInput as meaning no input.  Because the service starts with\r
+          no stdin we can't just pass GetStdHandle(STD_INPUT_HANDLE) to\r
+          the application.\r
+\r
+          The only way we can successfully redirect the application's output\r
+          while preventing programs which exit after reading all input from\r
+          exiting prematurely is to create a pipe between ourselves and the\r
+          application but write nothing to it.\r
+        */\r
+        if (! CreatePipe(&si->hStdInput, &service->stdin_pipe, 0, 0)) {\r
+          log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_STDIN_CREATEPIPE_FAILED, service->name, error_string(GetLastError()), 0);\r
+          return 2;\r
+        }\r
+        SetHandleInformation(si->hStdInput, HANDLE_FLAG_INHERIT, HANDLE_FLAG_INHERIT);\r
+      }\r
+    }\r
+    else {\r
+      si->hStdInput = CreateFile(service->stdin_path, FILE_READ_DATA, service->stdin_sharing, &attributes, service->stdin_disposition, service->stdin_flags, 0);\r
+      if (! si->hStdInput) {\r
+        log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATEFILE_FAILED, service->stdin_path, error_string(GetLastError()), 0);\r
+        return 2;\r
+      }\r
+\r
+      set_flags = true;\r
+    }\r
+  }\r
+\r
   if (! set_flags) return 0;\r
 \r
   /*\r