Complement a coding system for encoding arguments and input to a process.

1 files changed, 28 insertions, 8 deletions

diff --git a/src/process.c b/src/process.c
index 7adc114075e..3e2aa61ffe6 100644
--- a/src/process.c
+++ b/src/process.c
@@ -1727,6 +1727,11 @@ usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS)  */)
           val = XCDR (Vdefault_process_coding_system);
       }
     XPROCESS (proc)->encode_coding_system = val;
+    /* Note: At this momemnt, the above coding system may leave
+       text-conversion or eol-conversion unspecified.  They will be
+       decided after we read output from the process and decode it by
+       some coding system, or just before we actually send a text to
+       the process.  */
   }
 
 
@@ -1769,6 +1774,7 @@ usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS)  */)
         tem = Fsubstring (tem, make_number (2), Qnil);
 
       {
+        Lisp_Object arg_encoding = Qnil;
         struct gcpro gcpro1;
         GCPRO1 (tem);
 
@@ -1786,9 +1792,14 @@ usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS)  */)
             tem = Fcons (args[i], tem);
             CHECK_STRING (XCAR (tem));
             if (STRING_MULTIBYTE (XCAR (tem)))
-              XSETCAR (tem,
-                       code_convert_string_norecord
-                       (XCAR (tem), XPROCESS (proc)->encode_coding_system, 1));
+              {
+                if (NILP (arg_encoding))
+                  arg_encoding = (complement_process_encoding_system
+                                  (XPROCESS (proc)->encode_coding_system));
+                XSETCAR (tem,
+                         code_convert_string_norecord
+                         (XCAR (tem), arg_encoding, 1));
+              }
           }
 
         UNGCPRO;
@@ -5690,12 +5701,21 @@ send_process (proc, buf, len, object)
           && !NILP (XBUFFER (object)->enable_multibyte_characters))
       || EQ (object, Qt))
     {
+      p->encode_coding_system
+        = complement_process_encoding_system (p->encode_coding_system);
       if (!EQ (Vlast_coding_system_used, p->encode_coding_system))
-        /* The coding system for encoding was changed to raw-text
-           because we sent a unibyte text previously.  Now we are
-           sending a multibyte text, thus we must encode it by the
-           original coding system specified for the current process.  */
-        setup_coding_system (p->encode_coding_system, coding);
+        {
+          /* The coding system for encoding was changed to raw-text
+             because we sent a unibyte text previously.  Now we are
+             sending a multibyte text, thus we must encode it by the
+             original coding system specified for the current process.
+
+             Another reason we comming here is that the coding system
+             was just complemented and new one was returned by
+             complement_process_encoding_system.  */
+          setup_coding_system (p->encode_coding_system, coding);
+          Vlast_coding_system_used = p->encode_coding_system;
+        }
       coding->src_multibyte = 1;
     }
   else