Trouble with text file

I wrote a program to sort through 300,000 lines of formatted data in a text file to try to save some time. I am having a few problems.

It's either locking up or getting into an infinite loop I cant figure out. When I put it through GDB and did backtrace it showed this

0 ... in __kernel_vsyscall ()
1 ... in read () from /lib/libc.do.6
2 ... in _IO_file_underflow () from /lib/libc.so.6
3 ... in _IO_default_uflow () from /lib/libc.so.6
4 ... in __uflow () from /lib/libc.so.6
5 ... in _IO_getline_info () from /lib/libc.so.6
6 ... in _IO_getline () from /lib/libc.so.6
7 ... in fgets () from /lib/libc.so.6
8 ... in find_subrec

Any help would be greatly appreciated. I'll post some of the code if that would help but it is almost 400 lines. Thanks in advance.

Show us your find_subrec() function perhaps?

The whole edifice is here, and only 4 hours old

The OP first needs to learn patience, then they need to read this