Re: Check file/dir existence

[Vern Hamberg <vhamberg@xxxxxxxxxxxxxxxxxxxxxxxxx>]

I haven't, but access returns an integer (4-byte). The first parameter is a
const null-terminated string, the second is a 4-byte integer, with
permissible values 0,1,2,4 (existence, execute, write, read, resp.)

QlgAccess() uses a Qlg_Path_Name_T data type (struct - would need to be
defined as a data structure). Definition of the Qlg_Path_Name_T struct is
in QSYSINC/H(QLG). Definitions of the functions are in QSYSINC/H(UNISTD).

Qlg* APIs are generally V5R1 and later.

HTH

Vern

At 08:21 PM 11/20/2002 -0500, you wrote:

> OK, Has anyone made an RPGIV prototype for the two API's below ?
>
> John Carr
>
>
> ------------
> >Is there an easy way for a program to determine if a file or directory
> >exists in the IFS?
> >Syd Nicholson
>
> YES!! access() is the function you want - in the Unix-type APIs.
>
> In C, here's a macro to do this:
>
> #include <unistd.h>
> #define exists(x) (access(x, F_OK) == 0)  /* x is full path to object */
>
> This works on anything you can specify with a pathname.
>
> BTW, F_OK = 0.
>
> There's also a national language version, QlgAccess(), that uses a pathname
> structure that includes CCSID, pathname separator infor, etc.
>
> HTH
>
> Vern