DPNS_READDIRX
Section: DPNS Library Functions (3)
Updated: $Date: 2006/03/16 13:02:57 $
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NAME
dpns_readdirx - read DPNS directory opened by
dpns_opendir
in the name server
SYNOPSIS
#include <sys/types.h>
#include "dpns_api.h"
struct dpns_direnstat *dpns_readdirx (dpns_DIR *dirp)
DESCRIPTION
dpns_readdirx
reads the DPNS directory opened by
dpns_opendir
in the name server.
This routine returns a pointer to a structure containing the current directory
entry including the
stat
information.
dpns_readdirx
caches a variable number of such entries, depending on the filename size, to
minimize the number of requests to the name server.
- dirp
-
specifies the pointer value returned by
dpns_opendir.
RETURN VALUE
This routine returns a pointer to a structure containing the current directory
entry if the operation was successful or NULL if the end of the directory was
reached or if the operation failed. When the end of the directory is encountered,
serrno is not changed. If the operation failed,
serrno
is set appropriately.
As dpns_readdirx returns a null pointer
both at the end of the directory and on error, an application wishing to check
for error situations should set
serrno
to 0, then call dpns_readdirx, then check
serrno
and if it is non-zero, assume an error has occurred.
ERRORS
- EBADF
-
File descriptor in DIR structure is invalid.
- EFAULT
-
dirp
is a NULL pointer.
- SENOSHOST
-
Host unknown.
- SENOSSERV
-
Service unknown.
- SECOMERR
-
Communication error.
- ENSNACT
-
Name server is not running or is being shutdown.
SEE ALSO
dpns_closedir(3),
dpns_opendir(3),
dpns_rewinddir(3),
dirent,
stat(2)
AUTHOR
LCG Grid Deployment Team