3 files changed, 29 insertions, 4 deletions
diff --git a/common/init.c b/common/init.c
index f551416c5..475eaefda 100644
--- a/common/init.c
+++ b/common/init.c
@@ -37,6 +37,12 @@
 #include "util.h"
 
 
+/* The default error source of the application.  This is different
+   from GPG_ERR_SOURCE_DEFAULT in that it does not depend on the
+   source file and thus is usable in code shared by applications.  */
+gpg_err_source_t default_errsource;
+
+
 #ifdef HAVE_W32CE_SYSTEM
 static void parse_std_file_handles (int *argcp, char ***argvp);
 static void
@@ -74,10 +80,16 @@ writestring_via_estream (int mode, const char *string)
    required for logging is ready.  ARGCP and ARGVP are the addresses
    of the parameters given to main.  This function may modify them.
 
+   This function should be called only via the macro
+   init_common_subsystems.
+
    CAUTION: This might be called while running suid(root).  */
 void
-init_common_subsystems (int *argcp, char ***argvp)
+_init_common_subsystems (gpg_err_source_t errsource, int *argcp, char ***argvp)
 {
+  /* Store the error source in a gloabl variable. */
+  default_errsource = errsource;
+
   /* Try to auto set the character set.  */
   set_native_charset (NULL);
 
diff --git a/common/init.h b/common/init.h
index e8fe499d8..b13c060a6 100644
--- a/common/init.h
+++ b/common/init.h
@@ -1,5 +1,5 @@
 /* init.h - Definitions for init fucntions.
- *	Copyright (C) 2007 Free Software Foundation, Inc.
+ * Copyright (C) 2007, 2012 Free Software Foundation, Inc.
  *
  * This file is part of GnuPG.
  *
@@ -20,7 +20,15 @@
 #ifndef GNUPG_COMMON_INIT_H
 #define GNUPG_COMMON_INIT_H
 
-void init_common_subsystems (int *argcp, char ***argvp);
+#ifndef GPG_ERR_SOURCE_DEFAULT
+# error GPG_ERR_SOURCE_DEFAULT is not defined
+#elseif GPG_ERR_SOURCE_DEFAULT == GPG_ERR_SOURCE_UNKNOWN
+# error GPG_ERR_SOURCE_DEFAULT has default value
+#endif
 
+void _init_common_subsystems (gpg_err_source_t errsource,
+                              int *argcp, char ***argvp);
+#define init_common_subsystems(a,b)                             \
+  _init_common_subsystems (GPG_ERR_SOURCE_DEFAULT, (a), (b))
 
 #endif /*GNUPG_COMMON_INIT_H*/
diff --git a/common/util.h b/common/util.h
index 9381f29e4..5ea7b819a 100644
--- a/common/util.h
+++ b/common/util.h
@@ -63,7 +63,6 @@
 #include "../common/utf8conv.h"
 #include "../common/dynload.h"
 
-#include "init.h"
 #include "gettime.h"
 
 /* Redefine asprintf by our estream version which uses our own memory
@@ -113,6 +112,12 @@ typedef char **rl_completion_func_t (const char *, int, int);
 #define xmalloc_clear(a) gcry_xcalloc (1, (a))
 #define xmalloc_secure_clear(a) gcry_xcalloc_secure (1, (a))
 
+/* The default error source of the application.  This is different
+   from GPG_ERR_SOURCE_DEFAULT in that it does not depend on the
+   source file and thus is usable in code shared by applications.
+   Defined by init.c.  */
+extern gpg_err_source_t default_errsource;
+
 /* Convenience function to return a gpg-error code for memory
    allocation failures.  This function makes sure that an error will
    be returned even if accidently ERRNO is not set.  */