Added interactive mode

src/sfxc.c

@@ -1,18 +1,36 @@
 #include "common.h"
+#include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/socket.h>
 #include <sys/un.h>
 #include <unistd.h>
+#include <sys/select.h>
+
+struct sockaddr_un sa_server, sa_client;
+
+void cleanup(void) {
+  fprintf(stderr, "[client:dbg] Removing receiving socket.\n");
+  if (sa_client.sun_path[0] != '\0') {
+    unlink(sa_client.sun_path);
+  }
+}
+
+void on_sigint(int sig) {
+  (void)sig;
+  cleanup();
+}
 
 int main(int argc, char **argv) {
-  struct sockaddr_un sa_server, sa_client;
   int sock_fd;
   static char buffer[BUFFER_SIZE];
 
   EXPECT(sock_fd = socket(AF_UNIX, SOCK_DGRAM, 0), > 0);
 
+  signal(SIGINT, on_sigint);
+  atexit(cleanup);
+
   memset(&sa_server, 0, sizeof(sa_server));
   memset(&sa_client, 0, sizeof(sa_client));
 
@@ -22,6 +40,38 @@ int main(int argc, char **argv) {
 
   EXPECT(bind(sock_fd, (struct sockaddr *)&sa_client, sizeof(struct sockaddr_un)), == 0);
 
+  if (argc == 1) {
+    fprintf(stderr, "[client:inf] You're in the interactive mode. Press Ctrl+C or Ctrl+D to exit.\n");
+
+    struct timeval timeout;
+    fd_set fds;
+    int retval, data_len;
+    while (1) {
+      timeout.tv_sec = 1;
+      timeout.tv_usec = 0;
+      FD_ZERO(&fds);
+      FD_SET(STDIN_FILENO, &fds);
+      FD_SET(sock_fd, &fds);
+
+      EXPECT(retval = select(sock_fd + 1, &fds, 0, 0, &timeout), != -1);
+      if (retval > 0) {
+        if (FD_ISSET(STDIN_FILENO, &fds)) {
+          EXPECT(data_len = read(STDIN_FILENO, buffer, BUFFER_SIZE), != -1);
+          if (data_len == 0) {
+            break;
+          }
+          buffer[data_len - 1] = '\0';
+          EXPECT(sendto(sock_fd, buffer, strlen(buffer), 0, (struct sockaddr *)&sa_server, sizeof(sa_server)), == (ssize_t)strlen(buffer));
+        }
+
+        if (FD_ISSET(sock_fd, &fds)) {
+          while ((data_len = recv(sock_fd, buffer, BUFFER_SIZE, 0)) > 0) {
+            printf("%.*s", data_len, buffer);
+          }
+        }
+      }
+    }
+  } else {
     for (int i = 1; i < argc; i++) {
       strncat(buffer, argv[i], BUFFER_SIZE - strlen(buffer) - 1);
       if (i != argc - 1) {
@@ -30,13 +80,12 @@ int main(int argc, char **argv) {
     }
 
     printf("send: '%s'\n", buffer);
-
     EXPECT(sendto(sock_fd, buffer, strlen(buffer), 0, (struct sockaddr *)&sa_server, sizeof(sa_server)), == (ssize_t)strlen(buffer));
     int data_len;
     while ((data_len = recv(sock_fd, buffer, BUFFER_SIZE, 0)) > 0) {
       printf("%.*s", data_len, buffer);
     }
+  }
 
-  unlink(sa_client.sun_path);
   exit(EXIT_SUCCESS);
 }

src/sfxd.c

@@ -190,6 +190,7 @@ ssize_t send_txt(struct msg_target tgt, const char *fmt, ...) {
 
 void execute_command(struct msg_target tgt, const char *command, const char *params) {
   send_txt(tgt, "INF: Received '%s' with '%s'\n", command, params);
+  send_txt((struct msg_target){ stdout, 0, 0, 0 }, "INF: Received '%s' with '%s'\n", command, params);
 
   if (0 == strcmp(command, "load")) {
     const char *key = params;