Revise variant labels and match EAGAIN symbolically

diff --git a/x5/khatus.c b/x5/khatus.c
index 93550a9..9c84a7b 100644 (file)
--- a/x5/khatus.c
+++ b/x5/khatus.c
@@ -57,10 +57,10 @@ struct Config {
 };
 
 enum read_status {
-       FAIL_FINAL     = -2,
-       FAIL_TMP       = -1,
-       END_OF_FILE    =  0,
-       END_OF_MESSAGE =  1
+       END_OF_FILE,
+       END_OF_MESSAGE,
+       RETRY,
+       FAILURE
 };
 
 void
@@ -340,10 +340,12 @@ fifo_read_one(Fifo *f, char *buf)
                case -1:
                        error("Failed to read: \"%s\". errno: %d, msg: %s\n",
                            f->name, errno, strerror(errno));
-                       if (errno == 11)
-                               return FAIL_TMP;
-                       else
-                               return FAIL_FINAL;
+                       switch (errno) {
+                       case EAGAIN:
+                               return RETRY;
+                       default:
+                               return FAILURE;
+                       }
                case  0:
                        debug("%s: End of FILE\n", f->name);
                        f->pos_curr = f->pos_init;
@@ -418,12 +420,12 @@ fifo_read_all(Config *cfg, char *buf)
                        debug("reading: %s\n", f->name);
                        switch (fifo_read_one(f, buf)) {
                        case END_OF_FILE:
-                       case FAIL_FINAL:
+                       case FAILURE:
                                close(f->fd);
                                f->fd = -1;
                                break;
                        case END_OF_MESSAGE:
-                       case FAIL_TMP:
+                       case RETRY:
                                break;
                        default:
                                assert(0);