如何在目标c中查找文件类型

#include<stdio.h>
#include <magic.h>

int main(int argc, char *argv[]) {
    if (argc != 2) {
        printf("Usage: %s<filename>\n", argv[0]);
        return 1;
    }

    magic_t magic_cookie = magic_open(MAGIC_MIME_TYPE);
    if (magic_cookie == NULL) {
        printf("Failed to initialize magic library\n");
        return 1;
    }

    if (magic_load(magic_cookie, NULL) != 0) {
        printf("Failed to load magic database\n");
        magic_close(magic_cookie);
        return 1;
    }

    const char *mime_type = magic_file(magic_cookie, argv[1]);
    if (mime_type == NULL) {
        printf("Failed to determine file type\n");
        magic_close(magic_cookie);
        return 1;
    }

    printf("File type: %s\n", mime_type);

    magic_close(magic_cookie);
    return 0;
}