1 files changed, 23 insertions, 10 deletions

diff --git a/src/process.h b/src/process.h
index 649056a99ff..43cc7ea33c0 100644
--- a/src/process.h
+++ b/src/process.h
@@ -26,11 +26,13 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #include "gnutls.h"
 #endif
 
-/* This structure records information about a subprocess
-   or network connection.
+/* Most code should use these macros to set
+   Lisp fields in struct Lisp_Process.  */
 
-   Every field in this structure except for the header
-   must be a Lisp_Object, for GC's sake.  */
+#define PSET(p, field, value) ((p)->field = (value))
+
+/* This structure records information about a subprocess
+   or network connection.  */
 
 struct Lisp_Process
   {
@@ -38,45 +40,62 @@ struct Lisp_Process
 
     /* Name of subprocess terminal.  */
     Lisp_Object tty_name;
+
     /* Name of this process */
     Lisp_Object name;
+
     /* List of command arguments that this process was run with.
        Is set to t for a stopped network process; nil otherwise. */
     Lisp_Object command;
+
     /* (funcall FILTER PROC STRING)  (if FILTER is non-nil)
        to dispose of a bunch of chars from the process all at once */
     Lisp_Object filter;
+
     /* (funcall SENTINEL PROCESS) when process state changes */
     Lisp_Object sentinel;
+
     /* (funcall LOG SERVER CLIENT MESSAGE) when a server process
        accepts a connection from a client.  */
     Lisp_Object log;
+
     /* Buffer that output is going to */
     Lisp_Object buffer;
+
     /* t if this is a real child process.  For a network or serial
        connection, it is a plist based on the arguments to
        make-network-process or make-serial-process.  */
+
     Lisp_Object childp;
+
     /* Plist for programs to keep per-process state information, parameters, etc.  */
     Lisp_Object plist;
+
     /* Symbol indicating the type of process: real, network, serial  */
     Lisp_Object type;
+
     /* Marker set to end of last buffer-inserted output from this process */
     Lisp_Object mark;
+
     /* Symbol indicating status of process.
        This may be a symbol: run, open, or closed.
        Or it may be a list, whose car is stop, exit or signal
        and whose cdr is a pair (EXIT_CODE . COREDUMP_FLAG)
        or (SIGNAL_NUMBER . COREDUMP_FLAG).  */
     Lisp_Object status;
+
     /* Coding-system for decoding the input from this process.  */
     Lisp_Object decode_coding_system;
+
     /* Working buffer for decoding.  */
     Lisp_Object decoding_buf;
+
     /* Coding-system for encoding the output to this process.  */
     Lisp_Object encode_coding_system;
+
     /* Working buffer for encoding.  */
     Lisp_Object encoding_buf;
+
     /* Queue for storing waiting writes */
     Lisp_Object write_queue;
 
@@ -163,12 +182,6 @@ extern int synch_process_termsig;
    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.
-   MS-DOS, and OS/2 redefine this.  */
-#ifndef NULL_DEVICE
-#define NULL_DEVICE "/dev/null"
-#endif
-
 /* Nonzero means don't run process sentinels.  This is used
    when exiting.  */
 extern int inhibit_sentinels;