X-Git-Url: http://git.iain.cx/?a=blobdiff_plain;f=event.cpp;h=726c9f104140de3bfa76498911d48d0bc58a4107;hb=fb6318bf814fd7f3445de8c83b7620e1b6b3c197;hp=661761dac8d3ef74aed441a0e313d06118bc6660;hpb=4440946eccf1cb14e16f8d29c54fb4acecbd44ff;p=nssm.git

diff --git a/event.cpp b/event.cpp
index 661761d..726c9f1 100644
--- a/event.cpp
+++ b/event.cpp
@@ -1,5 +1,24 @@
 #include "nssm.h"
 
+#define NSSM_ERROR_BUFSIZE 65535
+unsigned long tls_index;
+
+/* Convert error code to error string - must call LocalFree() on return value */
+char *error_string(unsigned long error) {
+  /* Thread-safe buffer */
+  char *error_message = (char *) TlsGetValue(tls_index);
+  if (! error_message) {
+    error_message = (char *) LocalAlloc(LPTR, NSSM_ERROR_BUFSIZE);
+    if (! error_message) return "<out of memory for error message>";
+    TlsSetValue(tls_index, (void *) error_message);
+  }
+
+  if (! FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, 0, error, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (char *) error_message, NSSM_ERROR_BUFSIZE, 0)) {
+    if (_snprintf(error_message, NSSM_ERROR_BUFSIZE, "system error %lu", error) < 0) return 0;
+  }
+  return error_message;
+}
+
 /* Log a message to the Event Log */
 void log_event(unsigned short type, unsigned long id, ...) {
   va_list arg;