Remove signal handler for SIGINT, print a \r at the end of cleanup, normalize error output

man1/stc.1

@@ -26,7 +26,7 @@ if it failed to setup terminal
 if it failed to create epoll instance
 .TP
 5
-if it failed to set signal handler (for SIGINT or SIGTERM)
+if it failed to set signal handler for SIGTERM
 .TP
 6
 if it failed to add a file descriptor to the epoll instance (for stdin or the socket)
@@ -39,6 +39,9 @@ if it failed to receive data
 .TP
 9
 if it failed to send data
+.TP
+10
+if unattended file descriptor is raised while polling
 .SH AUTHOR
 Franck STAUFFER
 .I <franck.stauffer@monaco.mc>

src/main.c

@@ -107,7 +107,7 @@ net_init(const char* host, const char* port)
 void
 sighandler(int sig)
 {
-    fprintf(stderr, "Received %s", (sig == SIGTERM) ? "SIGTERM" : "SIGINT");
+    fputs("\n\rINFO: Received SIGTERM\n", stderr);
     exit(sig);
 }
 
@@ -147,18 +147,13 @@ main(int argc, char** argv)
 
     epoll_fd = epoll_create1(0);
     if (epoll_fd == -1) {
-        perror("epoll_create1");
+        perror("ERROR: epoll_create1");
         return 4;
     }
 
     atexit(cleanup);
-    if (signal(SIGINT, sighandler) == SIG_ERR) {
-        perror("signal");
-        return 5;
-    }
-
     if (signal(SIGTERM, sighandler) == SIG_ERR) {
-        perror("signal");
+        perror("ERROR: signal");
         return 5;
     }
 
@@ -168,14 +163,14 @@ main(int argc, char** argv)
     ev[0].events = EPOLLIN;
     ev[0].data.fd = 0;
     if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, 0, &ev[0])) {
-        perror("epoll_ctl");
+        perror("ERROR: epoll_ctl");
         return 6;
     }
 
     ev[1].events = EPOLLIN;
     ev[1].data.fd = sock;
     if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, sock, &ev[1])) {
-        perror("epoll_ctl");
+        perror("ERROR: epoll_ctl");
         return 6;
     }
 
@@ -185,7 +180,7 @@ main(int argc, char** argv)
         struct epoll_event events[2];
         int_fast8_t count = epoll_wait(epoll_fd, events, 2, -1);
         if (count == -1) {
-            perror("epoll_wait");
+            perror("ERROR: epoll_wait");
             return 7;
         }
 
@@ -195,7 +190,7 @@ main(int argc, char** argv)
                 memset(buf, 0, 3);
                 int_fast8_t ret = recv(sock, buf, 1, 0);
                 if (ret == -1) {
-                    perror("recv");
+                    perror("ERROR: recv");
                     return 8;
                 }
 
@@ -205,7 +200,7 @@ main(int argc, char** argv)
                 if (buf[0] == IAC) {
                     ret = recv(sock, buf + 1, 2, 0);
                     if (ret < 0) {
-                        perror("recv");
+                        perror("ERROR: recv");
                         return 8;
                     }
 
@@ -225,7 +220,7 @@ main(int argc, char** argv)
                 }
 
                 if (send(sock, &chr, 1, 0) != 1) {
-                    perror("send");
+                    perror("ERROR: send");
                     return 9;
                 }