Re: Directory contents

[Jan-Benedict Glaw <jbglaw@lug-owl.de>]

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On Mon, 2004-11-29 12:55:17 +0530, sandeep <sandeep@codito.com>
wrote in message <41AACEDD.4080509@codito.com>:
> >I want to write a function that can read the contents of a specified 
> >directory
> >in order to find a certain type of file or to copy a directory-tree or
> >something else.
> >Neverthless I need of some system functions that find the files that are
> >contained in that directory (like FINDFIRST and FINDNEXT under ms-dos).
> >
> >Who can help me?
> "man scandir" and man on functions mentioned at the end of that manpage.

From the man page:
----------------------------- >8 ======================================
CONFORMING TO
       None  of  these  functions is in POSIX.  LSB has deprecated the library
       call alphasort() and never contained scandir().

       The functions scandir() and alphasort() are from BSD 4.3, and have been
       available  under  Linux since libc4.  Libc4 and libc5 use the more pre-
       cise prototype

       int alphasort(const struct dirent **a, const struct dirent **b);

       but glibc 2.0 returns to the imprecise BSD prototype.

       The function versionsort() is a GNU extension,  available  since  glibc
       2.1.   Since  glibc  2.1, alphasort() calls strcoll(3); earlier it used
       strcmp(3).
============================================ 8< -----------------------

So I guess you don't really want to use these functions. opendir(),
readdir() and closedir() are what's ment for that. If you're actually
writing an libc replacement (and thus need to use the syscall interface
instead of the libc interface), you can use open(..., ... | O_DIRECTORY)
in conjunction with getdents().

MfG, JBG

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