New macros NULL_DEVICE and EXEC_SUFFIXES, to give the name of the

	equivalent of /dev/null, and the suffixes used by executable
	files.  This is simple, and helps people porting Emacs to other
	operating systems.
	* process.h (NULL_DEVICE): Give this a default value.
	* process.c (Fstart_process): Pass EXEC_SUFFIXES to openp.
	(Fprocess_send_eof): Use NULL_DEVICE instead of "/dev/null".
	* callproc.c (Fcall_process): Pass EXEC_SUFFIXES to openp.
	Use NULL_DEVICE instead of "/dev/null".

1 files changed, 11 insertions, 0 deletions

diff --git a/src/process.h b/src/process.h
index 8f476f6894d..2ac7b59c6b7 100644
--- a/src/process.h
+++ b/src/process.h
@@ -91,3 +91,14 @@ extern char *synch_process_death;
    this is exit code of synchronous subprocess.  */
 extern int synch_process_retcode;
 
+/* The name of the file open to get a null file, or a data sink.
+   VMS, MS-DOS, and OS/2 redefine this.  */
+#ifndef NULL_DEVICE
+#define NULL_DEVICE "/dev/null"
+#endif
+
+/* A string listing the possible suffixes used for executable files,
+   separated by colons.  VMS, MS-DOS, and OS/2 redefine this.  */
+#ifndef EXEC_SUFFIXES
+#define EXEC_SUFFIXES ""
+#endif