Howdy... Can anyone offer any suggestions on how to test whether a directory
is empty in a opendir/readdir/closedir scheme?  I thought that I could
increment a counter for every thing that readdir finds, and if it gets to 2
( . and .. ) and then gets null, then that directory is empty...  something
like that, maybe, but i'm having trouble with the implementation.  Any
thoughts?

Guidance is, as always, appreciated.


void
printAllFileInfo( void ){

struct dirent *dstat;
DIR *dirp;

int i;
for(i=0;i<dlistlen;i++){
dirp = opendir( dlist[i] );
printf("\n%s:\n",dlist[i]);
while( dstat=readdir(dirp) ){    /* something something here....? */
if( strcmp(dstat->d_name,".") == 0 ||
strcmp(dstat->d_name,"..") == 0 )
continue;

/* pass the path and the filename to printOneFileInfo */
printOneFileInfo( dlist[i],dstat->d_name );

}
}

closedir(dirp);
}

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"John" <iamlevi3@hotmail.com> writes:

> Howdy... Can anyone offer any suggestions on how to test whether a directo
ry
> is empty in a opendir/readdir/closedir scheme?  I thought that I could
> increment a counter for every thing that readdir finds, and if it gets to 
2
> ( . and .. ) and then gets null, then that directory is empty...  somethin
g
> like that, maybe, but i'm having trouble with the implementation.  Any
> thoughts?

It depends on the file system type. Not all file systems include . and
.. in directories.


--
__Pascal Bourguignon__                     http://www.informatimago.com/

There is no worse tyranny than to force a man to pay for what he does not
want merely because you think it would be good for him. -- Robert Heinlein

[ Post a follow-up to this message ]

"John" <iamlevi3@hotmail.com> writes:

> Howdy... Can anyone offer any suggestions on how to test whether a
> directory is empty in a opendir/readdir/closedir scheme?

That depends from how your filesystem is implemented.  Under Linux
(pseudocode):

file_counter <- 0
loop over readdir {
if (dirent.d_ino is 0) {
/* Empty inode (removed file) */
} else if (dirent.d_name is .  OR  dirent.d_iname is ..) {
/* Pseudo-files (current and up directory) */
} else {
a real entry; increment file_counter
}
}

--
Maurizio Loreti                         [url]http://www.pd.infn.it/~loreti/mlo.html[/ur
l]
Dept. of Physics, Univ. of Padova, Italy              ROT13: ybergv@cq.vasa.
vg

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