diff options
Diffstat (limited to 'sh.asm')
| -rw-r--r-- | sh.asm | 13 |
1 files changed, 11 insertions, 2 deletions
@@ -7,7 +7,9 @@ section .data nfe: db "Error: program not found", 0x2e, `\n` env: db "/etc/environment", 0x0 boem: db "Error: input overflows buffer", 0x2e, `\n` - invalid_int_str: db "Error: Invalid integer",`\n` + no_dir_str: db "cd: Unknown directory",`\n` + no_dir_str_len: equ $-no_dir_str + invalid_int_str: db "exit: Invalid integer",`\n` invalid_int_str_len: equ $-invalid_int_str ;Flag indicating ability to execute X_OK equ 0x1 @@ -431,12 +433,19 @@ _quit: xor rdi, rdi syscall -;cd [dir] +;cd [dir (rax)] ;changes to the given directory _builtin_cd: mov rdi,rax mov rax, sys_chdir syscall + cmp rax, 0 + jz _read_loop + mov rax, sys_write + mov rdi, 0x1 + mov rsi, no_dir_str + mov rdx, no_dir_str_len + syscall jmp _read_loop ;usage: exit [status] ;exits with the given status or 0 if one hasn't been provided |