Revert the serial_recv() timeout handling as it used to be before my

yesterday's changes (i.e. before rev. 1.10 of ser_posix.c), that is,
exit(1) in case of a timeout.  Previously, the upper layers didn't see
the timeout at all.

Quite possible that some of these drivers could handle a timeout more
intelligently though.  At least for the rather sophisticated STK500v2
protocol, I think it should be possible to retry the request.


git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@460 81a1dc3b-b13d-400b-aceb-764788c761c2

avr910.c

@@ -52,7 +52,16 @@ static int avr910_send(PROGRAMMER * pgm, char * buf, size_t len)
 
 static int avr910_recv(PROGRAMMER * pgm, char * buf, size_t len)
 {
-  return serial_recv(pgm->fd, buf, len);
+  int rv;
+
+  rv = serial_recv(pgm->fd, buf, len);
+  if (rv < 0) {
+    fprintf(stderr,
+	    "%s: avr910_recv(): programmer is not responding\n",
+	    progname);
+    exit(1);
+  }
+  return 0;
 }
 
 

butterfly.c

@@ -66,9 +66,18 @@ static int butterfly_send(PROGRAMMER * pgm, char * buf, size_t len)
 
 static int butterfly_recv(PROGRAMMER * pgm, char * buf, size_t len)
 {
+  int rv;
+
   no_show_func_info();
 
-  return serial_recv(pgm->fd, buf, len);
+  rv = serial_recv(pgm->fd, buf, len);
+  if (rv < 0) {
+    fprintf(stderr,
+	    "%s: butterfly_recv(): programmer is not responding\n",
+	    progname);
+    exit(1);
+  }
+  return 0;
 }
 
 

stk500.c

@@ -63,7 +63,16 @@ static int stk500_send(PROGRAMMER * pgm, char * buf, size_t len)
 
 static int stk500_recv(PROGRAMMER * pgm, char * buf, size_t len)
 {
-  return serial_recv(pgm->fd, buf, len);
+  int rv;
+
+  rv = serial_recv(pgm->fd, buf, len);
+  if (rv < 0) {
+    fprintf(stderr,
+	    "%s: stk500_recv(): programmer is not responding\n",
+	    progname);
+    exit(1);
+  }
+  return 0;
 }
 
 

stk500v2.c

@@ -128,7 +128,8 @@ static int stk500v2_recv(PROGRAMMER * pgm, unsigned char msg[], size_t maxsize)
   tstart = tv.tv_sec;
 
   while ( (state != sDONE ) && (!timeout) ) {
-    serial_recv(pgm->fd, &c, 1);
+    if (serial_recv(pgm->fd, &c, 1) < 0)
+      goto timedout;
     DEBUG("0x%02x ",c);
     checksum ^= c;
 
@@ -203,6 +204,7 @@ static int stk500v2_recv(PROGRAMMER * pgm, unsigned char msg[], size_t maxsize)
      gettimeofday(&tv, NULL);
      tnow = tv.tv_sec;
      if (tnow-tstart > timeoutval) {			// wuff - signed/unsigned/overflow
+      timedout:
        fprintf(stderr, "%s: stk500_2_ReceiveMessage(): timeout\n",
                progname);
        return -1;