shell

shell berjalan sebagai infinite loop di kernel_main() (src/kernel/core/kernel.c).

loop utama

while (1) {
 char c = keyboard_getchar();

 if (c == '\n') {
 input[index] = 0; // null-terminate
 vga_putc('\n');
 vga_refresh_cursor();

 // parse command
 if (strcmp(input, "help") == 0) { ... }
 else if (starts_with(input, "edit ")) { ... }
 else if (starts_with(input, "cat ")) { ... }
 // ... semua command ...
 else if (index != 0) {
 vga_print("perintah tidak dikenal: ");
 vga_print(input);
 vga_print("\n");
 }

 index = 0;
 // print prompt lagi
 vga_print("oasis"); vga_putc('(');
 vfs_getcwd(cwd_buf, sizeof(cwd_buf));
 vga_print(cwd_buf); vga_putc(')'); vga_print("> ");
 vga_refresh_cursor();
 }
 else if (c == '\b') {
 if (index > 0) { index--; vga_putc('\b'); vga_refresh_cursor(); }
 }
 else {
 if (index < INPUT_MAX - 1) { input[index++] = c; vga_putc(c); vga_refresh_cursor(); }
 }
}

INTERNAL_MAX = 256.

command reference

help

print daftar command. kalau help more tampilkan semua command termasuk yang jarang dipakai.

ls [path]

list directory. parse output dari vfs_list():

kalau type ‘d’ (directory): warna kuning (VGA_COLOR_YELLOW)
kalau type ‘f’ (file): warna putih

output dari vfs_list format: d nama_dir\nf nama_file\n

if (out[j] == 'd') {
 vga_set_color(VGA_COLOR_YELLOW, VGA_COLOR_BLACK);
 j += 2; // skip "d "
 while (out[j] != 0 && out[j] != '\n') vga_putc(out[j++]);
 if (out[j] == '\n') j++;
 vga_set_color(15, VGA_COLOR_BLACK);
 vga_print(" "); // spacing antar item
}

cd

panggil vfs_chdir(arg). kalau return != 0, print “cd: failed”.

pwd

panggil vfs_getcwd(pathbuf, sizeof(pathbuf)), print hasilnya.

mkdir

panggil vfs_mkdir(arg).

touch

panggil vfs_create(arg).

rm

panggil vfs_unlink(arg).

rmdir

panggil vfs_rmdir(arg).

cat

int fd = vfs_open(arg, VFS_O_READ);
if (fd < 0) { vga_print("cat: open failed\n"); }
else {
 char rbuf[128]; int n;
 while ((n = vfs_read(fd, rbuf, sizeof(rbuf) - 1)) > 0) {
 rbuf[n] = 0;
 vga_print(rbuf);
 }
 vga_print("\n");
 vfs_close(fd);
}

write

int fd = vfs_open(arg, VFS_O_WRITE | VFS_O_CREATE | VFS_O_TRUNC);
if (fd >= 0) {
 vfs_write(fd, text, strlen(text));
 vfs_close(fd);
}

append

sama seperti write tapi pakai VFS_O_APPEND.

echo

print teks + newline.

hexdump

read file, print tiap byte sebagai hex.

edit

panggil editor_run(arg).

nasm

panggil asm_run_file(arg).

user

panggil run_user_test(arg).

occ

panggil run_occ(arg).

dmesg

panggil log_dump().

syscall

print tabel syscall.

uptime

timer_get_ticks() / 100 = detik sejak boot.

meminfo

print pmm_get_free_pages() + total memory.

taskinfo

print semua task + status + stack + eip.

OasisOS