user: 请从给定的汇编指令推导出C源代码:

```asm
<main>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x1000,%rsp
  orq    $0x0,(%rsp)
  sub    $0x78,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x1068(%rsp)
  xor    %eax,%eax
  cmp    $0x1,%edi
  jle    L25
  lea    0x8(%rsi),%rax
  mov    %rax,0x18(%rsp)
  lea    -0x2(%rdi),%eax
  lea    0x10(%rsi,%rax,8),%rax
  mov    %rax,0x28(%rsp)
  lea    0x61(%rsp),%rax
  mov    %rax,0x10(%rsp)
  nopw   0x0(%rax,%rax,1)
L170:
  mov    0x18(%rsp),%rax
  mov    D26(%rip),%rcx
  mov    (%rax),%rax
  mov    (%rcx),%esi
  mov    %rax,%rdi
  mov    %rax,0x20(%rsp)
  call   <open@plt>
  mov    %eax,%ebp
  test   %eax,%eax
  js     L105
  lea    0x38(%rsp),%rsi
  mov    %eax,%edi
  call   <fstat@plt>
  test   %rax,%rax
  js     L105
  mov    D8(%rip),%rax
  mov    0x20(%rsp),%rdi
  mov    (%rax),%esi
  call   <open@plt>
  mov    %eax,%r12d
  test   %eax,%eax
  js     L24
  lea    0x1060(%rsp),%rax
  lea    0x60(%rsp),%r14
  mov    %rax,0x8(%rsp)
  mov    %r14,%r13
L185:
  mov    0x8(%rsp),%edx
  mov    %r13,%rsi
  mov    %ebp,%edi
  sub    %r13d,%edx
  call   <full_read@plt>
  test   %eax,%eax
  js     L88
  je     L33
  mov    %r13,%rsi
  mov    %r14,%rbx
  sub    %r14,%rsi
  lea    (%rax,%rsi,1),%r15d
  mov    0x10(%rsp),%rax
  jmp    L53
  nopl   0x0(%rax,%rax,1)
L151:
  sub    $0x1,%r15d
  mov    %sil,-0x1(%rax)
  add    $0x1,%rbx
  mov    %rax,%rdx
  test   %r15d,%r15d
  jle    L199
L107:
  add    $0x1,%rax
L53:
  movzbl (%rbx),%esi
  lea    -0x1(%rax),%rdx
  cmp    $0xd,%sil
  jne    L151
  cmp    $0x1,%r15d
  jle    L199
  movzbl 0x1(%rbx),%esi
  mov    %rax,%rdx
  cmp    $0xa,%sil
  je     L135
  movb   $0xd,-0x1(%rax)
  add    $0x1,%rbx
  sub    $0x1,%r15d
  jmp    L107
  xchg   %ax,%ax
L135:
  sub    $0x2,%r15d
  mov    %sil,-0x1(%rax)
  add    $0x2,%rbx
  test   %r15d,%r15d
  jg     L107
  nopl   0x0(%rax)
L199:
  sub    %r14d,%edx
  mov    %r14,%rsi
  mov    %r12d,%edi
  call   <full_write@plt>
  test   %rax,%rax
  js     L88
  mov    %r14,%r13
  cmp    $0x1,%r15d
  jne    L185
  movzbl (%rbx),%eax
  mov    0x10(%rsp),%r13
  mov    %al,0x60(%rsp)
  jmp    L185
L33:
  cmp    %r14,%r13
  je     L6
  mov    %r13d,%edx
  mov    %r14,%rsi
  mov    %r12d,%edi
  sub    %r14d,%edx
  call   <full_write@plt>
  test   %rax,%rax
  js     L88
L6:
  mov    D28(%rip),%rax
  xor    %esi,%esi
  mov    %r12d,%edi
  mov    (%rax),%edx
  call   <lseek@plt>
  mov    %rax,%rsi
  test   %rax,%rax
  js     L88
  mov    %r12d,%edi
  call   <ftruncate@plt>
  test   %rax,%rax
  js     L88
  mov    %r12d,%edi
  call   <close@plt>
  mov    %ebp,%edi
  call   <close@plt>
  mov    0x3c(%rsp),%eax
  mov    0x20(%rsp),%rdi
  lea    0x40(%rsp),%rsi
  movq   $0x0,0x40(%rsp)
  mov    %eax,0x48(%rsp)
  mov    0x38(%rsp),%eax
  movq   $0x0,0x50(%rsp)
  mov    %eax,0x58(%rsp)
  call   <utimes@plt>
  test   %rax,%rax
  jns    L47
L105:
  mov    0x20(%rsp),%rdi
  call   <perror@plt>
L47:
  addq   $0x8,0x18(%rsp)
  mov    0x18(%rsp),%rax
  cmp    0x28(%rsp),%rax
  jne    L170
L25:
  xor    %edi,%edi
  call   <exit@plt>
  mov    0x1068(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L201
  add    $0x1078,%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L88:
  mov    0x20(%rsp),%rdi
  call   <perror@plt>
  mov    %r12d,%edi
  call   <close@plt>
  mov    %ebp,%edi
  call   <close@plt>
  jmp    L47
L24:
  mov    0x20(%rsp),%rdi
  call   <perror@plt>
  mov    %ebp,%edi
  call   <close@plt>
  jmp    L47
L201:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
int main(int argc, char *argv[]) {
  int i;
  for (i = 1; i < argc; i++) {
    char *filename = argv[i];
    int rfd = open(filename, O_RDONLY);
    if (rfd < 0) {
      perror(filename);
      goto next;
    }
    {
      struct stat statbuf;
      if (fstat(rfd, &statbuf) < 0) {
        perror(filename);
        goto next;
      }
      {
        int wfd = open(filename, O_RDWR);
        if (wfd < 0) {
          perror(filename);
          close(rfd);
          goto next;
        }
        {
          char buffer[4096];
          char *bufend = &buffer[4096];
          register char *srcptr = &buffer[0];
          register char *destptr;
          while (1) {
            register int count = full_read(rfd, srcptr, bufend - srcptr);
            if (count < 0) {
              perror(filename);
              close(wfd);
              close(rfd);
              goto next;
            }
            if (count == 0)
              break;
            count += (srcptr - &buffer[0]);
            destptr = srcptr = &buffer[0];
            do {
              if (*srcptr == 13) {
                if (count > 1) {
                  if (srcptr[1] == 10) {
                    *destptr++ = 10;
                    srcptr += 2;
                    count -= 2;
                  } else {
                    *destptr++ = *srcptr++;
                    count--;
                  }
                } else
                  break;
              } else {
                *destptr++ = *srcptr++;
                count--;
              }
            } while (count > 0);
            if (full_write(wfd, buffer, destptr - buffer) < 0) {
              perror(filename);
              close(wfd);
              close(rfd);
              goto next;
            }
            if (count > 0) {
              buffer[0] = *srcptr;
              srcptr = &buffer[1];
            } else {
              srcptr = &buffer[0];
            }
          }
          if (srcptr != buffer) {
            if (full_write(wfd, buffer, srcptr - buffer) < 0) {
              perror(filename);
              close(wfd);
              close(rfd);
              goto next;
            }
          }
        }
        {
          off_t length = lseek(wfd, 0, SEEK_CUR);
          if (length < 0) {
            perror(filename);
            close(wfd);
            close(rfd);
            goto next;
          }
          if (ftruncate(wfd, length) < 0) {
            perror(filename);
            close(wfd);
            close(rfd);
            goto next;
          }
        }
        close(wfd);
      }
      close(rfd);
      {
        struct timeval tv[2];
        tv[0].tv_sec = statbuf.st_atime;
        tv[0].tv_usec = 0;
        tv[1].tv_sec = statbuf.st_mtime;
        tv[1].tv_usec = 0;
        if (utimes(filename, tv) < 0) {
          perror(filename);
          goto next;
        }
      }
    }
  next:;
  }
  exit(0);
}
```