Created attachment 8093 [details]
(This is on 7.8, but a quick glance at the source suggests it is also present in more recent versions).
Consider the following transcript of a GDB session:
(gdb) file /home/
Clearly, it would be nice if the GDB output were more helpful. (The transcript may seem trivial; however, this problem leads to significantly more confusion in the context of KDevelop's gdb plugin.)
I am attaching a patch proposal which changes the behavior to:
(gdb) file /home/haehnle
/home/haehnle: Is a directory.
(gdb) file /home/haehnle/asdfs
/home/haehnle/asdfs: No such file or directory.
(gdb) file /dev/null
/dev/null: Exec format error.
(The last case is a bit of an odd one out. Unfortunately, there is no ENOTAREGULARFILE as far as I can tell, and ENOEXEC was the best I could come up with.)
I tripped over this this morning, and came up with a similar patch,
Patch committed here: