Base: added basic shell

4 files changed, 67 insertions, 0 deletions

diff --git a/src/pOS/arch/x86/kernel/shell.cpp b/src/pOS/arch/x86/kernel/shell.cpp
new file mode 100644
index 0000000..b6e74be
--- /dev/null
+++ b/src/pOS/arch/x86/kernel/shell.cpp
@@ -0,0 +1,46 @@
+#include <kernel/shell.h>
+
+char Shell::prefix[10];
+
+int Shell::init(void)
+{
+    Shell::set_prefix("pOS# ");
+    return run();
+}
+
+int Shell::run(void)     /* TODO: implement args */
+{
+    char c;
+    char cmd[20];        /* Mem management */
+    int indx = 0;
+    printf("pOS# ");
+    while((c = getc()) && c != EOF)
+    {
+        putc(c);
+
+        if(c == '\n')
+        {
+            cmd[indx] = '\0';
+            indx = 0;
+
+            handle_cmd(cmd);
+            printf(Shell::prefix);
+        }
+        else
+            cmd[indx++] = c;
+    }
+
+    ASSERT(c == EOF);
+    return 0;
+}
+
+int Shell::handle_cmd(const char* cmd)
+{
+    printf("Unknown cmd: %s\n", cmd);
+    return 0;
+}
+
+void Shell::set_prefix(const char* new_prefix)
+{
+    strncpy(prefix, new_prefix, sizeof(prefix));
+}
diff --git a/src/pOS/include/kernel/kernel.h b/src/pOS/include/kernel/kernel.h
index 622ef88..671bee6 100644
--- a/src/pOS/include/kernel/kernel.h
+++ b/src/pOS/include/kernel/kernel.h
@@ -5,6 +5,7 @@
 #include <math.h>
 #include <assert.h>
 
+#include <kernel/shell.h>
 #include <kernel/time.h>
 #include <kernel/debug.h>
 #include <kernel/drivers.h>
diff --git a/src/pOS/include/kernel/shell.h b/src/pOS/include/kernel/shell.h
new file mode 100644
index 0000000..cb1cc4b
--- /dev/null
+++ b/src/pOS/include/kernel/shell.h
@@ -0,0 +1,18 @@
+#ifndef _SHELL_H_
+#define _SHELL_H_
+
+#include <stdio.h>
+#include <assert.h>
+
+class Shell
+{
+public:
+    static int init(void);
+    static void set_prefix(const char* prefix);
+private:
+    static int run(void);
+    static int handle_cmd(const char* cmd);
+    static char prefix[10];
+};
+
+#endif
diff --git a/src/pOS/kernel/kernel.cpp b/src/pOS/kernel/kernel.cpp
index 4b76b81..1de0818 100644
--- a/src/pOS/kernel/kernel.cpp
+++ b/src/pOS/kernel/kernel.cpp
@@ -23,6 +23,8 @@ extern "C" int kmain(void)
 
     printf("Current time: %s (%s-%d-%d%d)\n", Time::get_date_formatted(), Time::get_month_string(), Time::get_day(), Time::get_century() - 1, Time::get_year());
 
+    Shell::init();
+
     System::idle_loop();
 
     ASSERT(false);