如何在Linux上获取文件类型？

Question

I need to get file type without using file extensions on linux. There is "file" utility, which can do this. How can I do the same using C/C++? Not 'system(const char *)', of course... Thanks)

Answer 1

AFAIK file is implemented over libmagic . For more reference see:

• file sources
• and maybe this link: http://linux.die.net/man/3/libmagic .

Answer 2

Either call file as a child process or emulate what it does. There are no other options if you want to intelligently examine a file's content to guess what it contains.