如何确定打开的文件是套接字还是管道？-Howtodetermineifanopenfileisasocketorapipe?

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There are special macro definitions at linux/stat.h that checks inode->i_mode:

linux / stat.h中有一些特殊的宏定义，用于检查inode-> i_mode：

  #define S_ISLNK(m)      (((m) & S_IFMT) == S_IFLNK)
  #define S_ISREG(m)      (((m) & S_IFMT) == S_IFREG)
  #define S_ISDIR(m)      (((m) & S_IFMT) == S_IFDIR)
  #define S_ISCHR(m)      (((m) & S_IFMT) == S_IFCHR)
  #define S_ISBLK(m)      (((m) & S_IFMT) == S_IFBLK)
  #define S_ISFIFO(m)     (((m) & S_IFMT) == S_IFIFO)
  #define S_ISSOCK(m)     (((m) & S_IFMT) == S_IFSOCK)

It seems that you'll need to use 2 of them - S_ISFIFO and S_ISSOCK in a such way:

您似乎需要使用其中的两个 - S_ISFIFO和S_ISSOCK以这种方式：

if (S_ISFIFO(file->f_path.dentry->d_inode->i_mode)) {...}
if (S_ISSOCK(file->f_path.dentry->d_inode->i_mode)) {...}