From 73c7cada410244916314d44bfbf3be494a81fa4c Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@spreadspace.org>
Date: Wed, 30 Jan 2013 02:16:09 +0000
Subject: slightly better error handling for update keys

git-svn-id: https://svn.spreadspace.org/avr/trunk@102 aa12f405-d877-488e-9caf-2d797e2a1cc7
---
 usb-i2c-sl018/tuer-rfid.c   |  3 ++-
 usb-i2c-sl018/update-keys.c | 25 ++++++++++++++++++-------
 2 files changed, 20 insertions(+), 8 deletions(-)

(limited to 'usb-i2c-sl018')

diff --git a/usb-i2c-sl018/tuer-rfid.c b/usb-i2c-sl018/tuer-rfid.c
index 2406ec7..a50866e 100644
--- a/usb-i2c-sl018/tuer-rfid.c
+++ b/usb-i2c-sl018/tuer-rfid.c
@@ -259,13 +259,14 @@ void flash_keystore_from_stdio(void)
         byte_pos=0;
         eeprom_update_block(&keyslot,&keystore[keyslot_pos],sizeof(keyslot));
         keyslot_pos++;
-        fprintf(stdio,".");
+        fputc('.', stdio);
         fflush(stdio);
         led_toggle();
       }
     }
   }
   fprintf(stdio,"\n");
+  fputc(0, stdio);
   led_off();
 }
 
diff --git a/usb-i2c-sl018/update-keys.c b/usb-i2c-sl018/update-keys.c
index b730c6e..d4dfd06 100644
--- a/usb-i2c-sl018/update-keys.c
+++ b/usb-i2c-sl018/update-keys.c
@@ -37,15 +37,17 @@ uint8_t generate_csum(keyslot_t data)
   return sum2<<4 | sum1;
 }
 
-void send_key(keyslot_t key, FILE* dev)
+int send_key(keyslot_t key, FILE* dev)
 {
   fwrite(key, sizeof(keyslot_t), 1, dev);
   fflush(dev);
   char tmp;
   while(fread(&tmp, 1, 1, dev)) {
     fwrite(&tmp, 1, 1, stdout);
-    if(tmp == '.') break;
+    if(tmp == 0) return 1;
+    if(tmp == '.') return 0;
   }
+  return 0;
 }
 
 int main(int argc, char* argv[])
@@ -107,7 +109,10 @@ int main(int argc, char* argv[])
       key[j] = 0;
     }
     key[sizeof(keyslot_t)-1] = generate_csum(key);
-    send_key(key, dev);
+    if(send_key(key, dev)) {
+      fprintf(stderr, "send_key failed at keyslot %d\n", key_num);
+      return 1;
+    }
 
     key_num++;
     if(key_num > EEPROM_SIZE/sizeof(keyslot_t)) {
@@ -115,13 +120,19 @@ int main(int argc, char* argv[])
       break;
     }
   }
-  printf("read %d keys from STDIN\n", key_num);
+  printf("\nread %d keys from STDIN - filling rest of keystore with invalid keys\n", key_num);
   
   int i;
   for(i=0; i<=sizeof(keyslot_t)-1; ++i) key[i] = 0xFF;
-  for(i=key_num; i < EEPROM_SIZE/sizeof(keyslot_t); ++i)
-    send_key(key, dev);
-  printf("write finished\n");
+  for(i=key_num; i < EEPROM_SIZE/sizeof(keyslot_t); ++i) {
+    if(send_key(key, dev)) {
+      fprintf(stderr, "send_key failed at keyslot %d\n", key_num);
+      return 1;
+    }
+    key_num++;
+  }
+
+  printf("\nwrite of %d keys finished\n", key_num);
 
   return 0;
 }
-- 
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