user: 请将以下的汇编代码转换成C语言代码:

```asm
<main>:
  endbr64
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  cmp    $0x1,%edi
  jle    L79
  xor    %eax,%eax
  mov    %rsi,%rbx
  call   <setsid@plt>
  cmp    $0xffffffff,%eax
  je     L139
L180:
  xor    %eax,%eax
  call   <getpid@plt>
  mov    %eax,%r12d
  xor    %eax,%eax
  call   <getpgrp@plt>
  xor    %edi,%edi
  mov    %eax,%r13d
  call   <getsid@plt>
  mov    %r13d,%ecx
  mov    %r12d,%edx
  lea    D45(%rip),%rdi
  mov    %eax,%esi
  xor    %eax,%eax
  call   <printf@plt>
  call   <fork@plt>
  test   %eax,%eax
  js     L178
  je     L57
  xor    %edi,%edi
  call   <exit@plt>
L84:
  call   <fork@plt>
  mov    %eax,%ebp
  test   %eax,%eax
  js     L60
  je     L125
L72:
  mov    %ebp,%esi
  mov    %ebp,%edi
  call   <setpgid@plt>
  cmp    $0xffffffff,%eax
  je     L82
L89:
  xor    %edi,%edi
  mov    %ebp,%esi
  call   <setpgid@plt>
  cmp    $0xffffffff,%eax
  je     L171
L148:
  xor    %eax,%eax
  call   <print@plt>
  xor    %eax,%eax
L129:
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
L57:
  xor    %eax,%eax
  call   <setsid@plt>
  add    $0x1,%eax
  je     L68
L86:
  xor    %eax,%eax
  call   <getpid@plt>
  mov    %eax,%r12d
  xor    %eax,%eax
  call   <getpgrp@plt>
  xor    %edi,%edi
  mov    %eax,%r13d
  call   <getsid@plt>
  mov    %r13d,%ecx
  mov    %r12d,%edx
  lea    D88(%rip),%rdi
  mov    %eax,%esi
  xor    %eax,%eax
  call   <printf@plt>
  jmp    L84
L178:
  lea    D55(%rip),%rdi
  call   <err_sys@plt>
  jmp    L84
L60:
  lea    D55(%rip),%rdi
  call   <err_sys@plt>
  jmp    L72
L125:
  xor    %eax,%eax
  call   <getpid@plt>
  mov    %eax,%r12d
  xor    %eax,%eax
  call   <getpgrp@plt>
  xor    %edi,%edi
  mov    %eax,%r13d
  call   <getsid@plt>
  mov    %r13d,%ecx
  mov    %r12d,%edx
  lea    D84(%rip),%rdi
  mov    %eax,%esi
  xor    %eax,%eax
  call   <printf@plt>
  xor    %esi,%esi
  xor    %edi,%edi
  call   <setpgid@plt>
  add    $0x1,%eax
  je     L42
L3:
  mov    0x8(%rbx),%rdi
  xor    %edx,%edx
  mov    %rdi,%rsi
  call   <execlp@plt>
  or     $0xffffffff,%edi
  call   <exit@plt>
  jmp    L72
L139:
  lea    D63(%rip),%rdi
  call   <perror@plt>
  jmp    L180
L171:
  lea    D0(%rip),%rdi
  call   <err_sys@plt>
  jmp    L148
L82:
  lea    D14(%rip),%rdi
  call   <err_sys@plt>
  jmp    L89
L68:
  lea    D63(%rip),%rdi
  call   <err_sys@plt>
  jmp    L86
L42:
  lea    D40(%rip),%rdi
  call   <err_sys@plt>
  jmp    L3
L79:
  lea    D48(%rip),%rdi
  call   <puts@plt>
  or     $0xffffffff,%eax
  jmp    L129
```

tool_calls: name: retrieve_data
arguments: data_tag: D45
type_infered: string
name: retrieve_data
arguments: data_tag: D88
type_infered: string
name: retrieve_data
arguments: data_tag: D55
type_infered: string
name: retrieve_data
arguments: data_tag: D84
type_infered: string
name: retrieve_data
arguments: data_tag: D63
type_infered: string
name: retrieve_data
arguments: data_tag: D0
type_infered: string
name: retrieve_data
arguments: data_tag: D14
type_infered: string
name: retrieve_data
arguments: data_tag: D40
type_infered: string
name: retrieve_data
arguments: data_tag: D48
type_infered: string

tool: D45: parent %u: %u, %u


tool: D88: session %u: %u, %u


tool: D55: fork

tool: D84: child %u: %u, %u


tool: D63: setsid

tool: D0: setpgid 2

tool: D14: setpgid 1

tool: D40: setpgid child

tool: D48: Usage: session grpid

assistant: ```c
int main(int argc, char *argv[]) {
  if (argc < 2) {
    printf("Usage: session grpid\n");
    return -1;
  }
  if (setsid() == -1)
    perror("setsid");
  int ret = 0;
  pid_t pid = getpid();
  pid_t grp = getpgrp();
  pid_t sid = getsid(0);
  printf("parent %u: %u, %u\n", sid, pid, grp);
  pid_t cid = fork();
  if (cid < 0)
    err_sys("fork");
  else if (cid == 0) {
    if (setsid() == -1)
      err_sys("setsid");
    pid = getpid();
    grp = getpgrp();
    sid = getsid(0);
    printf("session %u: %u, %u\n", sid, pid, grp);
  } else
    exit(0);
  cid = fork();
  if (cid < 0)
    err_sys("fork");
  else if (cid == 0) {
    pid_t pid = getpid();
    pid_t grp = getpgrp();
    pid_t sid = getsid(0);
    printf("child %u: %u, %u\n", sid, pid, grp);
    ret = setpgid(0, 0);
    if (ret == -1)
      err_sys("setpgid child");
    execlp(argv[1], argv[1], NULL);
    exit(-1);
  }
  ret = setpgid(cid, cid);
  if (ret == -1)
    err_sys("setpgid 1");
  ret = setpgid(0, cid);
  if (ret == -1)
    err_sys("setpgid 2");
  print();
  return 0;
}
```