A simple id3v2 command-line tool.
1- Print ID3v2 tags.
2- Append the track number to the name of the file.
First compile the id3v2lib
Then link the id3v2lib while compiling
$ gcc id3tag.c -o id3tag -lid3v2lib
You could specify the path of the id3v2lib in case it was installed in a place that gcc could not find
$ gcc id3tag.c -o id3tag -lid3v2lib -I /path/to/id3v2lib.h