CODEWITHSUNDEEP
clinuxmime-types
tux_mind
tux_mind

Reputation: 306

include UNIX utility 'file' in C program

I'm writing a program in C, and I need to known the mime-type of a file.

I have yet searched with Google, and I found that I must include the 'file' UNIX utility in my project.

The source code of file need configure and make. How I can include this in my project? Do I have to crop a part of the source code into a new file.c and file.h?

Upvotes: 0

Views: 1069

Answers (2)

tux_mind
tux_mind

Reputation: 306

Thanks for yours answers and comments.

I solved with this:

const char *w_get_mime(const char *arg, const char *file, int line_no)
{

    const char *magic_full;
    magic_t magic_cookie;

    if(arg == NULL)
        w_report_error("called with NULL argument.",file,line_no,__func__,0,1,error);
    else if ((magic_cookie = magic_open(MAGIC_MIME) ) == NULL) 
        report_error("unable to initialize magic library.",0,1,error);
    else if (magic_load(magic_cookie, NULL) != 0) 
    {
        magic_close(magic_cookie);
        snprintf(globals.err_buff,MAX_BUFF,"cannot load magic database - %s .",magic_error(magic_cookie));
        report_error(globals.err_buff,0,1,error);
    }
    magic_full = magic_file(magic_cookie, arg);
    magic_close(magic_cookie);
    return magic_full;
}

thanks a lot! :)

Upvotes: 0

Michael Mior
Michael Mior

Reputation: 28762

Do you want to guess the MIME type based on the extension, or do something like file and examine the headers?

To get functionality similar to file, you don't need to include file in your project. Instead, you'll want to use libmagic which file is based on. Unfortunately I'm not aware of a good source of documentation for this, but it's pretty straightforward.

magic_t magic = magic_open(MAGIC_MIME_TYPE);
magic_load(magic, NULL);
char *mime_type = magic_file(magic, "/path/to/file");
magic_close(magic);

Upvotes: 7

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