5 files changed, 103 insertions, 7 deletions

diff --git a/include/relabsd/server.h b/include/relabsd/server.h
index 2bc0447..d5d36a6 100644
--- a/include/relabsd/server.h
+++ b/include/relabsd/server.h
@@ -37,3 +37,9 @@ int relabsd_server_join_communication_thread
 (
    struct relabsd_server server [const static 1]
 );
+
+int relabsd_server_handle_client
+(
+   const int socket,
+   struct relabsd_server server [const static 1]
+);
diff --git a/src/client.c b/src/client.c
index 4d1f659..c4c1148 100644
--- a/src/client.c
+++ b/src/client.c
@@ -144,7 +144,7 @@ static int send_commands
       }
    }
 
-   if (fputc('\0', socket) == EOF)
+   if (fputc('\n', socket) == EOF)
    {
    }
 
diff --git a/src/config/parameters/parameters.c b/src/config/parameters/parameters.c
index fa53b6a..e3328ca 100644
--- a/src/config/parameters/parameters.c
+++ b/src/config/parameters/parameters.c
@@ -394,13 +394,17 @@ void relabsd_parameters_print_usage (const char exec [const restrict static 1])
          "<options>:\n"
          "\t\t(Re)defines an axis.\n\n"
 
-      "\t[-m | --mod-axis] <name> <min> <max> <fuzz> <flat> <resolution> "
-         "<signed_options>:\n"
-         "\t\tModifies an axis (use + and - signs for the options).\n\n"
+      "\t[-m | --mod-axis] <name> <MOD_PARAM> [+|-|=]<value>:\n"
+         "\t\tModifies an axis.\n\n"
 
       "\t[-f | --config] <config_file>"
          "<options>:\n"
-         "\t\t(Re)defines an axis.\n",
+         "\t\t(Re)defines an axis.\n\n"
+
+      "\t[-q | --quit]:\n"
+         "\t\tTerminates the targeted server instance.\n\n"
+
+      "<MOD_PARAM>: [min|max|fuzz|flat|resolution]\n",
       exec
    );
 }
diff --git a/src/server/communication_thread.c b/src/server/communication_thread.c
index 0f367da..cc91065 100644
--- a/src/server/communication_thread.c
+++ b/src/server/communication_thread.c
@@ -9,7 +9,6 @@
 /******************************************************************************/
 /**** LOCAL FUNCTIONS *********************************************************/
 /******************************************************************************/
-
 static void main_loop (struct relabsd_server server [const static 1])
 {
    int communication_socket, current_client_socket;
@@ -87,7 +86,7 @@ static void main_loop (struct relabsd_server server [const static 1])
          return -1;
       }
 
-      (void) handle_client(current_client_socket, server);
+      (void) relabsd_server_handle_client(current_client_socket, server);
    }
 }
 
diff --git a/src/server/handle_client.c b/src/server/handle_client.c
new file mode 100644
index 0000000..696725b
--- /dev/null
+++ b/src/server/handle_client.c
@@ -0,0 +1,87 @@
+/**** POSIX *******************************************************************/
+/*
+ * To get the POSIX 'getline' function.
+ * We don't know what POSIX version is set by default.
+ */
+#define _POSIX_C_SOURCE 200809L
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+/**** RELABSD *****************************************************************/
+#include <relabsd/debug.h>
+#include <relabsd/server.h>
+
+/******************************************************************************/
+/**** LOCAL FUNCTIONS *********************************************************/
+/******************************************************************************/
+static void handle_input
+(
+   const ssize_t input_size,
+   const char input [const static 1],
+   struct relabsd_server server [const static 1]
+)
+{
+}
+
+/******************************************************************************/
+/**** EXPORTED FUNCTIONS ******************************************************/
+/******************************************************************************/
+int relabsd_server_handle_client
+(
+   const int socket,
+   struct relabsd_server server [const static 1]
+)
+{
+   FILE * socket_as_file;
+   /* FIXME: reallocating at every new connection is kind of wasteful. */
+   char * input;
+   ssize_t input_size;
+
+   errno = 0;
+   socket_as_file = fdopen(socket, "r");
+
+   if (socket_as_file == ((FILE *) NULL))
+   {
+      RELABSD_ERROR
+      (
+         "Unable to open client socket as a FILE: %s.",
+         strerror(errno)
+      );
+
+      (void) close(socket);
+
+      return -1;
+   }
+
+   errno = 0;
+
+   input_size = getline(&input, (size_t *) NULL, socket_as_file);
+
+   if (input_size < 1)
+   {
+      RELABSD_ERROR
+      (
+         "Unable to read line from client socket: %s.",
+         strerror(errno)
+      );
+
+      (void) free((void *) input);
+
+      /* This also closes 'socket' */
+      (void) fclose(socket_as_file);
+
+      return -1;
+   }
+
+   handle_input(input_size, input, server);
+
+   (void) free((void *) input);
+
+   /* This also closes 'socket' */
+   (void) fclose(socket_as_file);
+
+   return 0;
+}