How to determine what files a program is trying to open?

Question

I have a program that I have compiled for a Linux server. It was written in FORTRAN, although I don't think that is particularly relevant to the question.

At some point, the program spits out open: No such file or directory

And then terminates.

The issue is I have no idea what file/directory the program is attempting to open.

It would be really great if there was some kind of program, a bit like ldd (but not quite) which could be run to show what files a binary executable is attempting to open.

Does such a thing exist? If not is there a way to obtain such information from the Linux kernel?

Answer 1

man strace

In your case strace -e openat $YOURPOGRAM.

Answer 2

There is a program called strace which can do this

strace -f -e open <exe>

See https://linux-audit.com/monitor-file-access-by-linux-processes/