Tweak con script to do CRLF translation on received stream.

1 files changed, 23 insertions, 10 deletions

diff --git a/tool/con.c b/tool/con.c
index 8522786..92014e5 100644
--- a/tool/con.c
+++ b/tool/con.c
@@ -1,4 +1,5 @@
 /* con device */
+/* vim: set noexpandtab sw=8 : */
 
 #include <signal.h>
 #include <stdio.h>
@@ -14,24 +15,27 @@ void
 host(int fd)
 {
         int cc;
-        char buf[128];
+        char buf;
+#ifndef HEX
+        char last = '\r';
+#endif
 
         for (;;) {
-                cc = read(fd, buf, sizeof buf);
-#ifdef HEX
+                cc = read(fd, &buf, 1);
                 if (cc < 0)
                         break;
-                for (int i = 0; i < cc; ++i) {
+                if (cc) {
+#ifdef HEX
                         char hex[3];
-                        sprintf(hex, "%02X", (unsigned char) buf[i]);
+                        sprintf(hex, "%02X", (unsigned char) buf);
                         write(1, hex, 2);
-                }
 #else
-                if (cc > 0)
-                        write(1, buf, cc);
-                else if (cc < 0)
-                        break;
+                        if (buf == '\n' && last != '\r')
+                                write(1, "\r", 1);
+                        write(1, &buf, 1);
+                        last = buf;
 #endif
+                }
         }
 }
 
@@ -57,6 +61,15 @@ user(int fd)
                                 if (c == '.')
                                         return;
                         }
+#ifdef HEX
+                        char hex[5];
+                        sprintf(hex, "<%02X>", (unsigned char) c);
+                        write(1, hex, 4);
+#endif
+#ifdef SEND_CRLF
+                        if (c == '\n' && last != '\r')
+                                write(fd, "\r", 1);
+#endif
                         write(fd, &c, 1);
                         last = c;
                 }