Hello programmers,
I have a toolbox that's often working with a FILE * to access files
and the lot.
Recently, need has arisen to look at the filename of a file when I
only have a FILE *. I know I could be passing the filename from the
calling function, but since I don't know which entry to the toolbox I
took (e.g. toolbox-functions calling each other) it would be far
preferable
to query the filename of the file from the FILE * pointer that I
have.
Oh, and of course I'd need to find out if FILE * points to an actual
file or maybe something else.
Does anyone know how to do this?
Thanks in advance,
regards,
Pelle.
5  1825 
On Sep 12, 2:23 pm, Pelle <pelle1...@gmx.dewrote:
Hello programmers,
I have a toolbox that's often working with a FILE * to access files
and the lot.
Recently, need has arisen to look at the filename of a file when I
only have a FILE *. I know I could be passing the filename from the
calling function, but since I don't know which entry to the toolbox I
took (e.g. toolbox-functions calling each other) it would be far
preferable
to query the filename of the file from the FILE * pointer that I
have.
Oh, and of course I'd need to find out if FILE * points to an actual
file or maybe something else.
Does anyone know how to do this?
Not possible in standard C.
Jacob Navia maintains a compiler that offers this as an extension.
<http://www.cs.virginia.edu/~lcc-win32/>
There's possibly other compilers with such extensions. Discussing
those extensions, or the compilers here is off-topic.
Pelle wrote:
>
I have a toolbox that's often working with a FILE * to access
files and the lot. Recently, need has arisen to look at the
filename of a file when I only have a FILE *. I know I could be
passing the filename from the calling function, but since I don't
know which entry to the toolbox I took (e.g. toolbox-functions
calling each other) it would be far preferable to query the
filename of the file from the FILE * pointer that I have.
It is not possible. Unix and Unix clones are one of the major
areas running C programs. The file system is such that the file
name can disappear, or be changed, while the file is open. The
program using the file never knows about these details, and
functions correctly.
--
[mail]: Chuck F (cbfalconer at maineline dot net)
[page]: <http://cbfalconer.home.att.net>
Try the download section.
Dear all,
thank you for taking the time to shed some light on the problem as
well as highlighting additional problems that arise with it. I think
I'll have to skip on this one - since I'm not looking for a compiler-
specific way to do this.
Anyway,
thanks for your time and help, it's been appreciated!
Regards,
Pelle.
On 15 Sep, 09:41, Pelle <pelle1...@gmx.dewrote:
Dear all,
thank you for taking the time to shed some light on the problem as
well as highlighting additional problems that arise with it. I think
I'll have to skip on this one - since I'm not looking for a compiler-
specific way to do this.
Anyway,
thanks for your time and help, it's been appreciated!
Note the poster who posts under the name "Richard" sometimes
gives good advice and sometimes merely knocks other people and
generally tries to provoke a reaction.
Today he is having a troll day so just ignore him.
--
Nick keighley
Nick Keighley wrote:
>
.... snip ...
>
Note the poster who posts under the name "Richard" sometimes
gives good advice and sometimes merely knocks other people and
generally tries to provoke a reaction.
Today he is having a troll day so just ignore him.
He posts as "Richard<rg****@gmail.com>" (without the quotes), if
you want to PLONK his annoyances.
--
[mail]: Chuck F (cbfalconer at maineline dot net)
[page]: <http://cbfalconer.home.att.net>
Try the download section. This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics
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