From: Tulio A M Mendes <tadryanom@hotmail.com>
Date: Tue, 10 Feb 2026 05:56:54 +0000 (-0300)
Subject: feat: add kgetc() to console subsystem for kernel input
X-Git-Url: https://projects.tadryanom.me/?a=commitdiff_plain;h=229ed84d9d13954eee819586c97d896c7d634fcc;p=AdrOS.git

feat: add kgetc() to console subsystem for kernel input

kgetc() reads a single character via keyboard_read_blocking(),
providing a symmetric API alongside kprintf() for output.
This enables the kernel console (and future kconsole) to have
a generic input mechanism independent of architecture.

Passes: make, cppcheck, QEMU smoke test.
---

diff --git a/include/console.h b/include/console.h
index d404edc0..4b87ae22 100644
--- a/include/console.h
+++ b/include/console.h
@@ -24,6 +24,8 @@ int ksnprintf(char* out, size_t out_size, const char* fmt, ...);
 
 void kprintf(const char* fmt, ...);
 
+int kgetc(void);
+
 size_t klog_read(char* out, size_t out_size);
 
 #endif
diff --git a/src/kernel/console.c b/src/kernel/console.c
index 3243b8eb..ee55be7e 100644
--- a/src/kernel/console.c
+++ b/src/kernel/console.c
@@ -16,6 +16,7 @@
 #include "spinlock.h"
 #include "uart_console.h"
 #include "vga_console.h"
+#include "keyboard.h"
 
 static spinlock_t g_console_lock = {0};
 static int g_console_uart_enabled = 1;
@@ -227,6 +228,13 @@ void kprintf(const char* fmt, ...) {
     console_write(buf);
 }
 
+int kgetc(void) {
+    char c = 0;
+    int rd = keyboard_read_blocking(&c, 1);
+    if (rd <= 0) return -1;
+    return (int)(unsigned char)c;
+}
+
 size_t klog_read(char* out, size_t out_size) {
     if (!out || out_size == 0) return 0;