safer error checking and more doc

diff --git a/mt_rfid.h b/mt_rfid.h
index 7dfa6c98c64cd1b7c68c56ca59f63ca8d98ca5d3..fad9390290dd02e027eacc07f371a038d7e81ffd 100644 (file)
--- a/mt_rfid.h
+++ b/mt_rfid.h
@@ -24,6 +24,7 @@ typedef struct mt_rfid_t {
 } mt_rfid_t;
 
 // connect to the reader, add self to loop and make it write to fd
+// return 0 on success, negative number otherwise
 int mt_rfid_init(mt_rfid_t *self, struct ev_loop *loop, int fd);
 
 // disconnect from reader

diff --git a/mt_server.c b/mt_server.c
index 51b5b60c0374a0b894e8c55dd4d2015fdc29ec48..220b6bff45a52f6404325c8d9b54c56272b8ecba 100644 (file)
--- a/mt_server.c
+++ b/mt_server.c
@@ -192,7 +192,7 @@ int main(int argc, const char **argv)
 
     set_signal_exit(loop);
 
-    if (mt_server_init(&server, loop, STDIN_FILENO) == -1) {
+    if (mt_server_init(&server, loop, STDIN_FILENO) != 0) {
         return -1;
     }
 

diff --git a/mt_server.h b/mt_server.h
index 98fd5d1c9d5d0f3555eb13558a84408a90c60c75..bf7c6e27dc553e88f77240c7ec5e6202372e274c 100644 (file)
--- a/mt_server.h
+++ b/mt_server.h
@@ -29,6 +29,7 @@ typedef struct mt_server_t {
 } mt_server_t;
 
 // init self, add it to loop and make it read data from fd
+// return 0 on success, -1 otherwise
 int mt_server_init(mt_server_t *self, struct ev_loop *loop, int fd);
 
 // gett drunc an kil sellf