--- pgp/src/fileio.h	2018/04/24 16:39:29	1.1.1.3
+++ pgp/src/fileio.h	2018/04/24 16:42:28	1.1.1.6
@@ -7,6 +7,7 @@
 #endif
 
 #ifdef VMS
+#define PGP_SYSTEM_DIR "PGP$LIBRARY:"
 #define FOPRBIN		"rb","ctx=stm"
 #define FOPRTXT		"r"
 #if 0
@@ -20,6 +21,11 @@
 #define FOPWPBIN	"w+b","ctx=stm"
 #else
 #ifdef UNIX
+/*
+ * Directory for system-wide files.  Must end in a /, ready for
+ * dumb appending of the filename.  (If not defined, it's not used.)
+ */
+#define PGP_SYSTEM_DIR "/usr/local/lib/pgp/"
 #define FOPRBIN		"r"
 #define FOPRTXT		"r"
 #define FOPWBIN		"w"
@@ -41,10 +47,6 @@
 
 #define equal_buffers(buf1,buf2,count)	!memcmp( buf1, buf2, count )
 
-/* This macro is for burning sensitive data (byte arrays only) on stack.
-   Many of the file I/O routines use it for zapping buffers */
-#define burn(x) fill0(x,sizeof(x))
-
 /* Returns TRUE iff file is can be opened for reading. */
 boolean file_exists(char *filename);
 
@@ -79,6 +81,9 @@ char *maybe_force_extension(char *filena
    variable PGPPATH */
 char *buildfilename(char *result, char *fname);
 
+/* The same, but also searches PGP_SYETEM_DIR */
+char *buildsysfilename(char *result, char *fname);
+
 /* Build a path for fileName based on origPath */
 int build_path(char *path, char *fileName, char *origPath);
 
@@ -143,3 +148,8 @@ extern void settmpdir(char *path);
 extern void setoutdir(char *filename);
 extern boolean is_tempfile(char *path);
 extern boolean has_extension(char *filename, char *extension);
+
+/* Directories to search for the manuals */
+extern char const * const manual_dirs[];
+/* Returns non-zero if any manuals are missing */
+unsigned manuals_missing(void);