src/main.c: add comments and adjust variable names for readibility

1 files changed, 14 insertions, 10 deletions

diff --git a/src/main.c b/src/main.c
index 52a4a4a..85a884e 100644
--- a/src/main.c
+++ b/src/main.c
@@ -38,9 +38,10 @@ int main() {
     perror("could not establish connection");
     return 1;
   }
-  fds[0].fd = sfd;        /* socket file descriptor */
+
+  fds[0].fd = sfd;        /* the listening socket */
   fds[0].events = POLLIN; /* data to read */
-  nfds_t nfds = 1;        /* non file descriptor. something with timeout */
+  nfds_t nfds = 1; /* 1 = listener alone, grows by 1 per connected client */
   while (1) {
     /* we start the polling here */
     int ready =
@@ -49,8 +50,9 @@ int main() {
       perror("could not run poll");
       return 1;
     }
+    /* if new events are detected  by the socket listener */
     if (fds[0].revents & POLLIN) {
-      /* we accept the connections */
+      /* we accept the connection */
       int conn = accept(sfd, NULL, NULL);
       if (conn == -1) {
         perror("could not accept connection");
@@ -65,20 +67,22 @@ int main() {
     for (nfds_t i = 1; i < nfds; i++) {
       /* if client has something to say */
       if (fds[i].revents & POLLIN) {
-        char buf[1024];
-        ssize_t n = read(fds[i].fd, buf,
-                         sizeof(buf)); /* read the n which the client sent */
-        if (n <= 0) {
+        char buffer[1024]; /* create a new empty buffer */
+        ssize_t message =
+            read(fds[i].fd, buffer,
+                 sizeof(buffer)); /* read the message which the client sent */
+        /* if message of the client returns an error */
+        if (message <= 0) {
           /* close the connection if client disappeared or disconnected */
           close(fds[i].fd);
           fds[i] = fds[nfds - 1]; /* move back last slot */
-          nfds--;                 /* size down the current aray */
+          nfds--;                 /* size down the current array */
           i--;
         } else {
-          /* send every n bytes to the other clients */
+          /* send every message bytes to the other clients */
           for (nfds_t j = 1; j < nfds; j++) {
             if (j != i) {
-              write(fds[j].fd, buf, n);
+              write(fds[j].fd, buffer, message);
             }
           }
         }