feature: functional shell with help and merdella commands

TOOD: reboot, poweroff, echo, color
2024-09-10 20:03:33 +02:00
parent 232b19666a
commit 15bdb4743a
8 changed files with 232 additions and 19 deletions
--- a/src/shell/exec.c
+++ b/src/shell/exec.c
@ -0,0 +1,111 @@
+#include "kprintf.h"
+#include "shell.h"
+#include "string.h"
+#include "terminal.h"
+
+extern struct screen *screen;
+
+static CMD_TOK find_command(char *line)
+{
+	size_t i = 0;
+	bool uwu = false;
+	CMD_TOK command = ERROR;
+
+	if (!line[0])
+		return command;
+	while (line[i]) {
+		if (line[i] == ' ') {
+			uwu = true;
+			break;
+		}
+		i++;
+	}
+	line[i] = '\0';
+	if (!strcmp(line, "help"))
+		command = HELP;
+	else if (!strcmp(line, "reboot"))
+		command = REBOOT;
+	else if (!strcmp(line, "poweroff"))
+		command = POWEROFF;
+	else if (!strcmp(line, "echo"))
+		command = ECHO;
+	else if (!strcmp(line, "color"))
+		command = COLOR;
+	else if (!strcmp(line, "merdella"))
+		command = MERDELLA;
+	else
+		kprintf(0, "invalid command: %s\n", line);
+	if (uwu)
+		line[i] = ' ';
+	return command;
+}
+
+static void read_line(char *buf, size_t size)
+{
+	size_t i = 0;
+	struct key_event ev;
+	uint8_t prev_scan_code = 0;
+
+	while (1) {
+		ev = terminal_getkey();
+		if (ev.c == '\n')
+			break;
+		if (prev_scan_code != ev.scan_code && ev.scan_code) {
+			if (ev.scan_code == KEY_BACKSPACE && i) {
+				buf[--i] = '\0';
+				move_cursor(LEFT);
+				terminal_putchar(' ');
+				move_cursor(LEFT);
+			}
+			if (ev.c && i < size - 1) {
+				kprintf(0, "%c", ev.c);
+				buf[i++] = ev.c;
+			}
+			if (i >= size)
+				break;
+		}
+		prev_scan_code = ev.scan_code;
+	}
+	kprintf(0, "\n");
+	buf[i] = '\0';
+}
+
+void shell_init(void)
+{
+	while (1) {
+		kprintf(0, PROMPT);
+		read_line(screen->line, sizeof(screen->line));
+		switch (find_command(screen->line)) {
+		case HELP:
+			kprintf(0, "Welcome to bozOShell, the shell of "
+			           "bozOS\nAvailable commands: help, reboot, "
+			           "poweroff, echo, color, merdella\n");
+			break;
+		case REBOOT:
+			kprintf(0, "rebooting\n");
+			break;
+		case POWEROFF:
+			kprintf(0, "powering off\n");
+			break;
+		case ECHO:
+			kprintf(0, "echoing\n");
+			break;
+		case COLOR:
+			kprintf(0, "coloring\n");
+			break;
+		case MERDELLA: {
+			kprintf(0, POOP);
+			if (!strcmp("--credits", strchr(screen->line, ' ') + 1))
+				kprintf(
+				    0,
+				    "\nThis ascii masterpiece has been created "
+				    "by Targon (/)\n");
+			break;
+		}
+		case ERROR:
+			break;
+		default:
+			break;
+		}
+	}
+}