console: Read stdin as console input

src/console/console.c

@@ -3,9 +3,15 @@
 #include "game/gui/menu_background.h"
 #include "game/utils/settings.h"
 #include "utils/allocator.h"
+#include "utils/log.h"
 #include "video/video.h"
 #include <stdio.h>
 
+#if !defined(WIN32) && !defined(_WIN32)
+#include <fcntl.h>
+#include <unistd.h>
+#endif
+
 #define HISTORY_MAX 100
 #define BUFFER_INC(b) (((b) + 1) % sizeof(con->output))
 #define BUFFER_DEC(b) (((b) + sizeof(con->output) - 1) % sizeof(con->output))
@@ -223,6 +229,11 @@ bool console_init(void) {
     menu_transparent_bg_create(&con->background1, 322, 101);
     menu_background_create(&con->background2, 322, 101);
 
+    // Read from stdin needs to be nonblocking
+#if !defined(WIN32) && !defined(_WIN32)
+    fcntl(0, F_SETFL, fcntl(0, F_GETFL) | O_NONBLOCK);
+#endif
+
     console_init_cmd();
 
     // Print the header
@@ -333,7 +344,23 @@ void console_render(void) {
     }
 }
 
-void console_tick(void) {
+static size_t get_stdin_line(char *line, size_t size) {
+#if !defined(WIN32) && !defined(_WIN32)
+    ssize_t n = read(0, line, size);
+    if(n > 0) {
+        line[n - 1] = '\0';
+        return (size_t)(n - 1);
+    }
+#endif
+    return 0;
+}
+
+void console_tick(game_state *gs) {
+    if(get_stdin_line(con->input, sizeof(con->input)) > 0) {
+        DEBUG("Console line from stdin: %s", con->input, strlen(con->input));
+        console_handle_line(gs);
+        con->input[0] = '\0';
+    }
     if(con->is_open && con->y_pos < 100) {
         con->y_pos += 4;
         if(settings_get()->video.instant_console) {

src/console/console.h

@@ -12,7 +12,7 @@ bool console_init(void);
 void console_close(void);
 void console_event(game_state *scene, SDL_Event *event);
 void console_render(void);
-void console_tick(void);
+void console_tick(game_state *gs);
 void console_add_cmd(const char *name, command_func func, const char *doc);
 void console_remove_cmd(const char *name);
 

src/engine.c

@@ -279,7 +279,7 @@ void engine_run(engine_init_flags *init_flags) {
             has_static = static_wait > STATIC_TICKS;
             if(has_static) {
                 game_state_static_tick(gs, false);
-                console_tick();
+                console_tick(gs);
                 static_wait -= STATIC_TICKS;
             }