user: 请将以下的汇编代码转换成C语言代码：

```asm
<main>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x1000,%rsp
  orq    $0x0,(%rsp)
  sub    $0x1000,%rsp
  orq    $0x0,(%rsp)
  sub    $0x1000,%rsp
  orq    $0x0,(%rsp)
  sub    $0x4f0,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  movb   $0x53,-0x34a0(%rbp)
  movb   $0x48,-0x349f(%rbp)
  movb   $0x45,-0x349e(%rbp)
  movb   $0x4c,-0x349d(%rbp)
  movb   $0x4c,-0x349c(%rbp)
  movb   $0x3e,-0x349b(%rbp)
  movb   $0x20,-0x349a(%rbp)
  movb   $0x0,-0x3499(%rbp)
  movb   $0x74,-0x34be(%rbp)
  movb   $0x79,-0x34bd(%rbp)
  movb   $0x70,-0x34bc(%rbp)
  movb   $0x65,-0x34bb(%rbp)
  movb   $0x20,-0x34ba(%rbp)
  movb   $0x0,-0x34b9(%rbp)
  movb   $0x68,-0x34a6(%rbp)
  movb   $0x65,-0x34a5(%rbp)
  movb   $0x6c,-0x34a4(%rbp)
  movb   $0x70,-0x34a3(%rbp)
  movb   $0xd,-0x34a2(%rbp)
  movb   $0x0,-0x34a1(%rbp)
  movb   $0x65,-0x3488(%rbp)
  movb   $0x78,-0x3487(%rbp)
  movb   $0x65,-0x3486(%rbp)
  movb   $0x63,-0x3485(%rbp)
  movb   $0x75,-0x3484(%rbp)
  movb   $0x74,-0x3483(%rbp)
  movb   $0x65,-0x3482(%rbp)
  movb   $0x20,-0x3481(%rbp)
  movb   $0x0,-0x3480(%rbp)
  movb   $0x65,-0x34b8(%rbp)
  movb   $0x78,-0x34b7(%rbp)
  movb   $0x69,-0x34b6(%rbp)
  movb   $0x74,-0x34b5(%rbp)
  movb   $0xd,-0x34b4(%rbp)
  movb   $0x0,-0x34b3(%rbp)
  movb   $0x64,-0x3498(%rbp)
  movb   $0x65,-0x3497(%rbp)
  movb   $0x6c,-0x3496(%rbp)
  movb   $0x65,-0x3495(%rbp)
  movb   $0x74,-0x3494(%rbp)
  movb   $0x65,-0x3493(%rbp)
  movb   $0x20,-0x3492(%rbp)
  movb   $0x0,-0x3491(%rbp)
  movb   $0x63,-0x34b2(%rbp)
  movb   $0x6f,-0x34b1(%rbp)
  movb   $0x70,-0x34b0(%rbp)
  movb   $0x79,-0x34af(%rbp)
  movb   $0x20,-0x34ae(%rbp)
  movb   $0x0,-0x34ad(%rbp)
  movb   $0x64,-0x34d0(%rbp)
  movb   $0x69,-0x34cf(%rbp)
  movb   $0x72,-0x34ce(%rbp)
  movb   $0xd,-0x34cd(%rbp)
  movb   $0x63,-0x3490(%rbp)
  movb   $0x72,-0x348f(%rbp)
  movb   $0x65,-0x348e(%rbp)
  movb   $0x61,-0x348d(%rbp)
  movb   $0x74,-0x348c(%rbp)
  movb   $0x65,-0x348b(%rbp)
  movb   $0x20,-0x348a(%rbp)
  movb   $0x0,-0x3489(%rbp)
  movb   $0x42,-0x347f(%rbp)
  movb   $0x61,-0x347e(%rbp)
  movb   $0x64,-0x347d(%rbp)
  movb   $0x20,-0x347c(%rbp)
  movb   $0x43,-0x347b(%rbp)
  movb   $0x6f,-0x347a(%rbp)
  movb   $0x6d,-0x3479(%rbp)
  movb   $0x6d,-0x3478(%rbp)
  movb   $0x61,-0x3477(%rbp)
  movb   $0x6e,-0x3476(%rbp)
  movb   $0x64,-0x3475(%rbp)
  movb   $0x21,-0x3474(%rbp)
  movb   $0xd,-0x3473(%rbp)
  movb   $0xa,-0x3472(%rbp)
  movb   $0x0,-0x3471(%rbp)
  movb   $0xd,-0x34d3(%rbp)
  movb   $0xa,-0x34d2(%rbp)
  movb   $0x0,-0x34d1(%rbp)
  movb   $0x63,-0x34cc(%rbp)
  movb   $0x6c,-0x34cb(%rbp)
  movb   $0x73,-0x34ca(%rbp)
  movb   $0xd,-0x34c9(%rbp)
  movb   $0x6b,-0x34ac(%rbp)
  movb   $0x69,-0x34ab(%rbp)
  movb   $0x6c,-0x34aa(%rbp)
  movb   $0x6c,-0x34a9(%rbp)
  movb   $0x20,-0x34a8(%rbp)
  movb   $0x0,-0x34a7(%rbp)
  movb   $0x63,-0x34c8(%rbp)
  movb   $0x62,-0x34c7(%rbp)
  movb   $0x67,-0x34c6(%rbp)
  movb   $0x20,-0x34c5(%rbp)
  movb   $0x0,-0x34c4(%rbp)
  movb   $0x63,-0x34c3(%rbp)
  movb   $0x66,-0x34c2(%rbp)
  movb   $0x67,-0x34c1(%rbp)
  movb   $0x20,-0x34c0(%rbp)
  movb   $0x0,-0x34bf(%rbp)
  movb   $0x65,-0x3470(%rbp)
  movb   $0x78,-0x346f(%rbp)
  movb   $0x65,-0x346e(%rbp)
  movb   $0x63,-0x346d(%rbp)
  movb   $0x66,-0x346c(%rbp)
  movb   $0x6f,-0x346b(%rbp)
  movb   $0x72,-0x346a(%rbp)
  movb   $0x65,-0x3469(%rbp)
  movb   $0x67,-0x3468(%rbp)
  movb   $0x72,-0x3467(%rbp)
  movb   $0x6f,-0x3466(%rbp)
  movb   $0x75,-0x3465(%rbp)
  movb   $0x6e,-0x3464(%rbp)
  movb   $0x64,-0x3463(%rbp)
  movb   $0x20,-0x3462(%rbp)
  movb   $0x0,-0x3461(%rbp)
  mov    $0x0,%eax
  call   <enableInterrupts@plt>
L253:
  movb   $0x0,-0x3460(%rbp)
  movq   $0x0,-0x34e8(%rbp)
  movb   $0x0,-0x3410(%rbp)
  lea    -0x34a0(%rbp),%rax
  mov    $0x0,%r8d
  mov    $0x0,%ecx
  mov    %rax,%rdx
  mov    $0x0,%esi
  mov    $0x21,%edi
  mov    $0x0,%eax
  call   <interrupt@plt>
  lea    -0x3460(%rbp),%rax
  mov    $0x0,%r8d
  mov    $0x0,%ecx
  mov    %rax,%rdx
  mov    $0x1,%esi
  mov    $0x21,%edi
  mov    $0x0,%eax
  call   <interrupt@plt>
  lea    -0x34be(%rbp),%rcx
  lea    -0x3460(%rbp),%rax
  mov    $0x5,%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <strncmp@plt>
  test   %eax,%eax
  je     L287
  lea    -0x3460(%rbp),%rax
  add    $0x5,%rax
  mov    %rax,-0x34e8(%rbp)
  mov    -0x34e8(%rbp),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <cleanFilename@plt>
  lea    -0x3410(%rbp),%rdx
  mov    -0x34e8(%rbp),%rax
  mov    $0x0,%r8d
  mov    %rdx,%rcx
  mov    %rax,%rdx
  mov    $0x3,%esi
  mov    $0x21,%edi
  mov    $0x0,%eax
  call   <interrupt@plt>
  lea    -0x3410(%rbp),%rax
  mov    $0x0,%r8d
  mov    $0x0,%ecx
  mov    %rax,%rdx
  mov    $0x0,%esi
  mov    $0x21,%edi
  mov    $0x0,%eax
  call   <interrupt@plt>
  jmp    L253
L287:
  lea    -0x3488(%rbp),%rcx
  lea    -0x3460(%rbp),%rax
  mov    $0x8,%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <strncmp@plt>
  test   %eax,%eax
  je     L92
  lea    -0x3460(%rbp),%rax
  add    $0x8,%rax
  mov    %rax,-0x34e8(%rbp)
  mov    -0x34e8(%rbp),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <cleanFilename@plt>
  mov    -0x34e8(%rbp),%rax
  mov    $0x0,%r8d
  mov    $0x0,%ecx
  mov    %rax,%rdx
  mov    $0x4,%esi
  mov    $0x21,%edi
  mov    $0x0,%eax
  call   <interrupt@plt>
  jmp    L253
L92:
  lea    -0x34b8(%rbp),%rcx
  lea    -0x3460(%rbp),%rax
  mov    $0x5,%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <strncmp@plt>
  test   %eax,%eax
  je     L257
  mov    $0x0,%r8d
  mov    $0x0,%ecx
  mov    $0x0,%edx
  mov    $0x5,%esi
  mov    $0x21,%edi
  mov    $0x0,%eax
  call   <interrupt@plt>
  jmp    L253
L257:
  lea    -0x3498(%rbp),%rcx
  lea    -0x3460(%rbp),%rax
  mov    $0x7,%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <strncmp@plt>
  test   %eax,%eax
  je     L118
  lea    -0x3460(%rbp),%rax
  add    $0x7,%rax
  mov    %rax,-0x34e8(%rbp)
  mov    -0x34e8(%rbp),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <cleanFilename@plt>
  mov    -0x34e8(%rbp),%rax
  mov    $0x0,%r8d
  mov    $0x0,%ecx
  mov    %rax,%rdx
  mov    $0x7,%esi
  mov    $0x21,%edi
  mov    $0x0,%eax
  call   <interrupt@plt>
  jmp    L253
L118:
  lea    -0x34b2(%rbp),%rcx
  lea    -0x3460(%rbp),%rax
  mov    $0x5,%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <strncmp@plt>
  test   %eax,%eax
  je     L177
  lea    -0x3460(%rbp),%rax
  add    $0x5,%rax
  mov    %rax,-0x34e8(%rbp)
  mov    -0x34e8(%rbp),%rax
  mov    $0x20,%esi
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <indexOf@plt>
  cltq
  lea    0x1(%rax),%rdx
  mov    -0x34e8(%rbp),%rax
  add    %rdx,%rax
  mov    %rax,-0x34e0(%rbp)
  mov    -0x34e8(%rbp),%rax
  mov    $0x20,%esi
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <indexOf@plt>
  movslq %eax,%rdx
  mov    -0x34e8(%rbp),%rax
  add    %rdx,%rax
  movb   $0x0,(%rax)
  mov    -0x34e8(%rbp),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <cleanFilename@plt>
  mov    -0x34e0(%rbp),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <cleanFilename@plt>
  lea    -0x3410(%rbp),%rdx
  mov    -0x34e8(%rbp),%rax
  mov    $0x0,%r8d
  mov    %rdx,%rcx
  mov    %rax,%rdx
  mov    $0x3,%esi
  mov    $0x21,%edi
  mov    $0x0,%eax
  call   <interrupt@plt>
  lea    -0x34f0(%rbp),%rdx
  mov    -0x34e8(%rbp),%rax
  mov    $0x0,%r8d
  mov    %rdx,%rcx
  mov    %rax,%rdx
  mov    $0x63,%esi
  mov    $0x21,%edi
  mov    $0x0,%eax
  call   <interrupt@plt>
  mov    -0x34f0(%rbp),%ecx
  lea    -0x3410(%rbp),%rdx
  mov    -0x34e0(%rbp),%rax
  mov    %ecx,%r8d
  mov    %rdx,%rcx
  mov    %rax,%rdx
  mov    $0x8,%esi
  mov    $0x21,%edi
  mov    $0x0,%eax
  call   <interrupt@plt>
  jmp    L253
L177:
  lea    -0x34d0(%rbp),%rcx
  lea    -0x3460(%rbp),%rax
  mov    $0x4,%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <strncmp@plt>
  test   %eax,%eax
  je     L2
  mov    $0x0,%r8d
  mov    $0x0,%ecx
  mov    $0x0,%edx
  mov    $0x9,%esi
  mov    $0x21,%edi
  mov    $0x0,%eax
  call   <interrupt@plt>
  jmp    L253
L2:
  lea    -0x34c8(%rbp),%rcx
  lea    -0x3460(%rbp),%rax
  mov    $0x4,%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <strncmp@plt>
  test   %eax,%eax
  je     L263
  movzbl -0x345c(%rbp),%eax
  movsbl %al,%eax
  mov    $0x0,%r8d
  mov    $0x0,%ecx
  mov    %eax,%edx
  mov    $0xd,%esi
  mov    $0x21,%edi
  mov    $0x0,%eax
  call   <interrupt@plt>
  jmp    L253
L263:
  lea    -0x34c3(%rbp),%rcx
  lea    -0x3460(%rbp),%rax
  mov    $0x4,%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <strncmp@plt>
  test   %eax,%eax
  je     L155
  movzbl -0x345a(%rbp),%eax
  movsbl %al,%edx
  movzbl -0x345c(%rbp),%eax
  movsbl %al,%eax
  mov    $0x0,%r8d
  mov    %edx,%ecx
  mov    %eax,%edx
  mov    $0xc,%esi
  mov    $0x21,%edi
  mov    $0x0,%eax
  call   <interrupt@plt>
  jmp    L253
L155:
  lea    -0x34cc(%rbp),%rcx
  lea    -0x3460(%rbp),%rax
  mov    $0x4,%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <strncmp@plt>
  test   %eax,%eax
  je     L172
  mov    $0x0,%r8d
  mov    $0x0,%ecx
  mov    $0x0,%edx
  mov    $0xa,%esi
  mov    $0x21,%edi
  mov    $0x0,%eax
  call   <interrupt@plt>
  jmp    L253
L172:
  lea    -0x3490(%rbp),%rcx
  lea    -0x3460(%rbp),%rax
  mov    $0x7,%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <strncmp@plt>
  test   %eax,%eax
  je     L130
  lea    -0x3460(%rbp),%rax
  add    $0x7,%rax
  mov    %rax,-0x34e8(%rbp)
  mov    -0x34e8(%rbp),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <cleanFilename@plt>
  movl   $0x0,-0x34ec(%rbp)
L289:
  mov    -0x34ec(%rbp),%eax
  lea    -0x3410(%rbp),%rdx
  add    %rdx,%rax
  mov    $0x0,%r8d
  mov    $0x0,%ecx
  mov    %rax,%rdx
  mov    $0x1,%esi
  mov    $0x21,%edi
  mov    $0x0,%eax
  call   <interrupt@plt>
  mov    -0x34ec(%rbp),%eax
  lea    -0x3410(%rbp),%rdx
  lea    (%rdx,%rax,1),%rcx
  lea    -0x34d3(%rbp),%rax
  mov    $0x3,%edx
  mov    %rax,%rsi
  mov    %rcx,%rdi
  call   <strncmp@plt>
  test   %eax,%eax
  je     L162
  mov    -0x34ec(%rbp),%eax
  movb   $0x0,-0x3410(%rbp,%rax,1)
  nop
  lea    -0x3410(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  shr    $0x9,%rax
  lea    0x1(%rax),%rcx
  lea    -0x3410(%rbp),%rdx
  mov    -0x34e8(%rbp),%rax
  mov    %rcx,%r8
  mov    %rdx,%rcx
  mov    %rax,%rdx
  mov    $0x8,%esi
  mov    $0x21,%edi
  mov    $0x0,%eax
  call   <interrupt@plt>
  jmp    L253
L162:
  mov    -0x34ec(%rbp),%eax
  lea    -0x3410(%rbp),%rdx
  add    %rdx,%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  add    %eax,-0x34ec(%rbp)
  jmp    L289
L130:
  lea    -0x34ac(%rbp),%rcx
  lea    -0x3460(%rbp),%rax
  mov    $0x5,%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <strncmp@plt>
  test   %eax,%eax
  je     L259
  movzbl -0x345b(%rbp),%eax
  movsbl %al,%eax
  sub    $0x30,%eax
  mov    $0x0,%r8d
  mov    $0x0,%ecx
  mov    %eax,%edx
  mov    $0xb,%esi
  mov    $0x21,%edi
  mov    $0x0,%eax
  call   <interrupt@plt>
  jmp    L253
L259:
  lea    -0x3470(%rbp),%rcx
  lea    -0x3460(%rbp),%rax
  mov    $0xf,%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <strncmp@plt>
  test   %eax,%eax
  je     L99
  lea    -0x3460(%rbp),%rax
  add    $0xf,%rax
  mov    %rax,-0x34e8(%rbp)
  mov    -0x34e8(%rbp),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <cleanFilename@plt>
  mov    -0x34e8(%rbp),%rax
  mov    $0x0,%r8d
  mov    $0x0,%ecx
  mov    %rax,%rdx
  mov    $0xe,%esi
  mov    $0x21,%edi
  mov    $0x0,%eax
  call   <interrupt@plt>
  jmp    L253
L99:
  lea    -0x34a6(%rbp),%rcx
  lea    -0x3460(%rbp),%rax
  mov    $0x5,%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <strncmp@plt>
  test   %eax,%eax
  je     L171
  mov    $0x0,%r8d
  mov    $0x0,%ecx
  mov    $0x0,%edx
  mov    $0xf,%esi
  mov    $0x21,%edi
  mov    $0x0,%eax
  call   <interrupt@plt>
  jmp    L253
L171:
  lea    -0x347f(%rbp),%rax
  mov    $0x0,%r8d
  mov    $0x0,%ecx
  mov    %rax,%rdx
  mov    $0x0,%esi
  mov    $0x21,%edi
  mov    $0x0,%eax
  call   <interrupt@plt>
  jmp    L253
```

assistant: ```c
int main() {
  char buffer[80];
  char *filename1, *filename2, *filename3, *filename4, *processToKill;
  char fileContentBuffer[13312];
  char prompt[8], type[6], execute[9], exit[6], delete[8], copy[6], dir[4], create[8], errorMsg[15], newline[3], clear[4], kill[6], changeBG[5], changeFG[5], execforeground[16], help[6];
  unsigned int i;
  int numSectors;
  prompt[0] = 'S';
  prompt[1] = 'H';
  prompt[2] = 'E';
  prompt[3] = 'L';
  prompt[4] = 'L';
  prompt[5] = '>';
  prompt[6] = ' ';
  prompt[7] = '\0';
  type[0] = 't';
  type[1] = 'y';
  type[2] = 'p';
  type[3] = 'e';
  type[4] = ' ';
  type[5] = '\0';
  help[0] = 'h';
  help[1] = 'e';
  help[2] = 'l';
  help[3] = 'p';
  help[4] = '\r';
  help[5] = '\0';
  execute[0] = 'e';
  execute[1] = 'x';
  execute[2] = 'e';
  execute[3] = 'c';
  execute[4] = 'u';
  execute[5] = 't';
  execute[6] = 'e';
  execute[7] = ' ';
  execute[8] = '\0';
  exit[0] = 'e';
  exit[1] = 'x';
  exit[2] = 'i';
  exit[3] = 't';
  exit[4] = '\r';
  exit[5] = '\0';
  delete[0] = 'd';
  delete[1] = 'e';
  delete[2] = 'l';
  delete[3] = 'e';
  delete[4] = 't';
  delete[5] = 'e';
  delete[6] = ' ';
  delete[7] = '\0';
  copy[0] = 'c';
  copy[1] = 'o';
  copy[2] = 'p';
  copy[3] = 'y';
  copy[4] = ' ';
  copy[5] = '\0';
  dir[0] = 'd';
  dir[1] = 'i';
  dir[2] = 'r';
  dir[3] = '\r';
  create[0] = 'c';
  create[1] = 'r';
  create[2] = 'e';
  create[3] = 'a';
  create[4] = 't';
  create[5] = 'e';
  create[6] = ' ';
  create[7] = '\0';
  errorMsg[0] = 'B';
  errorMsg[1] = 'a';
  errorMsg[2] = 'd';
  errorMsg[3] = ' ';
  errorMsg[4] = 'C';
  errorMsg[5] = 'o';
  errorMsg[6] = 'm';
  errorMsg[7] = 'm';
  errorMsg[8] = 'a';
  errorMsg[9] = 'n';
  errorMsg[10] = 'd';
  errorMsg[11] = '!';
  errorMsg[12] = '\r';
  errorMsg[13] = '\n';
  errorMsg[14] = '\0';
  newline[0] = '\r';
  newline[1] = '\n';
  newline[2] = '\0';
  clear[0] = 'c';
  clear[1] = 'l';
  clear[2] = 's';
  clear[3] = '\r';
  kill[0] = 'k';
  kill[1] = 'i';
  kill[2] = 'l';
  kill[3] = 'l';
  kill[4] = ' ';
  kill[5] = '\0';
  changeBG[0] = 'c';
  changeBG[1] = 'b';
  changeBG[2] = 'g';
  changeBG[3] = ' ';
  changeBG[4] = '\0';
  changeFG[0] = 'c';
  changeFG[1] = 'f';
  changeFG[2] = 'g';
  changeFG[3] = ' ';
  changeFG[4] = '\0';
  execforeground[0] = 'e';
  execforeground[1] = 'x';
  execforeground[2] = 'e';
  execforeground[3] = 'c';
  execforeground[4] = 'f';
  execforeground[5] = 'o';
  execforeground[6] = 'r';
  execforeground[7] = 'e';
  execforeground[8] = 'g';
  execforeground[9] = 'r';
  execforeground[10] = 'o';
  execforeground[11] = 'u';
  execforeground[12] = 'n';
  execforeground[13] = 'd';
  execforeground[14] = ' ';
  execforeground[15] = '\0';
  enableInterrupts();
  while (1) {
    buffer[0] = '\0';
    filename1 = 0;
    fileContentBuffer[0] = '\0';
    interrupt(0x21, 0, prompt, 0, 0);
    interrupt(0x21, 1, buffer, 0, 0);
    if (strncmp(buffer, type, 5)) {
      filename1 = buffer + 5;
      cleanFilename(filename1);
      interrupt(0x21, 3, filename1, fileContentBuffer, 0);
      interrupt(0x21, 0, fileContentBuffer, 0, 0);
    } else if (strncmp(buffer, execute, 8)) {
      filename1 = buffer + 8;
      cleanFilename(filename1);
      interrupt(0x21, 4, filename1, 0, 0);
    } else if (strncmp(buffer, exit, 5)) {
      interrupt(0x21, 5, 0, 0, 0);
    } else if (strncmp(buffer, delete, 7)) {
      filename1 = buffer + 7;
      cleanFilename(filename1);
      interrupt(0x21, 7, filename1, 0, 0);
    } else if (strncmp(buffer, copy, 5)) {
      filename1 = buffer + 5;
      filename2 = filename1 + indexOf(filename1, ' ') + 1;
      filename1[indexOf(filename1, ' ')] = '\0';
      cleanFilename(filename1);
      cleanFilename(filename2);
      interrupt(0x21, 3, filename1, fileContentBuffer, 0);
      interrupt(0x21, 99, filename1, &numSectors, 0);
      interrupt(0x21, 8, filename2, fileContentBuffer, numSectors);
    } else if (strncmp(buffer, dir, 4)) {
      interrupt(0x21, 9, 0, 0, 0);
    } else if (strncmp(buffer, changeBG, 4)) {
      interrupt(0x21, 13, buffer[4], 0, 0);
    } else if (strncmp(buffer, changeFG, 4)) {
      interrupt(0x21, 12, buffer[4], buffer[6], 0);
    } else if (strncmp(buffer, clear, 4)) {
      interrupt(0x21, 10, 0, 0, 0);
    } else if (strncmp(buffer, create, 7)) {
      filename1 = buffer + 7;
      cleanFilename(filename1);
      i = 0;
      while (1) {
        interrupt(0x21, 1, fileContentBuffer + i, 0, 0);
        if (strncmp(fileContentBuffer + i, newline, 3)) {
          fileContentBuffer[i] = '\0';
          break;
        } else {
          i += strlen(fileContentBuffer + i);
        }
      }
      interrupt(0x21, 8, filename1, fileContentBuffer, strlen(fileContentBuffer) / 512 + 1);
    } else if (strncmp(buffer, kill, 5)) {
      interrupt(0x21, 11, ((int)buffer[5] - 0x30), 0, 0);
    } else if (strncmp(buffer, execforeground, 15)) {
      filename1 = buffer + 15;
      cleanFilename(filename1);
      interrupt(0x21, 14, filename1, 0, 0);
    } else if (strncmp(buffer, help, 5)) {
      interrupt(0x21, 15, 0, 0, 0);
    } else {
      interrupt(0x21, 0, errorMsg, 0, 0);
    }
  }
  return 0;
}
```