[PATCH v3] Allow using special files with File I/O functions

[Pedro Alves]

Hi,

Your message came our hard to read:

 https://sourceware.org/ml/gdb-patches/2018-06/msg00715.html

Please make sure your client is set up to quote replies.

On 06/29/2018 03:01 PM, Julio Guerra wrote:

> I assumed a system >= POSIX.1-2001 here. man 7 inode says:
> 
>  
> 
> The S_IF* constants are present in POSIX.1-2001 and later.
>  […]
>  The S_ISLNK() and S_ISSOCK() macros were not in POSIX.1-1996, but
>  both are present in POSIX.1-2001
> 
> 

POSIX specification != actual implementations.  Also, Windows != POSIX,
for example.  See the gnulib page I pointed at.  Also, looking through
history with "git blame", etc. may find something.

> Yes, because of man 2 open:
> 
>  
> 
> EISDIR: The named file is a directory and oflag includes O_WRONLY or O_RDWR,
>  or includes O_CREAT without O_DIRECTORY.

I assume you're on Linux, so "man 2" is the Linux Programmer's manual.
But GDB works in other hosts too.  So it may be the code was there for
some other host.  I mean, why did someone write that in the first place?
Again, sounds like some code archaeology is in order.

I forgot to say in the previous email, but it would be really nice if we
could add some coverage for these change to the testsuite.  I've asked
before but I don't remember the answer -- Would it be possible to portably
update e.g. gdb.base/fileio.exp to cover at least one kind
of FILEIO_STDEV_SPECIAL file?

Thanks,
Pedro Alves