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| osdnext |
| Portability: | SAS/C extension |
| SYNOPSIS | |
| DESCRIPTION | |
| RETURN VALUE | |
| CAUTION | |
| EXAMPLE | |
| RELATED FUNCTIONS | |
| SEE ALSO |
| SYNOPSIS |
#include <os.h> int osdnext(struct DSNINFO *info);
| DESCRIPTION |
osdnext
finds the next OS/390 data set or member matching a pattern previously defined
in a call to
osdfind
. The
info
pointer points to a
DSNINFO
structure filled in by a previous call to
osdfind
. If a match is found, information about the matching data set or
member is placed in the structure pointed to by
info
, as with
osdfind
. Refer to
the description of osdfind for a listing of the
DSNINFO
structure.
| RETURN VALUE |
osdnext
returns 0 if a matching data set or PDS member is found, or -1 if no
match is found. Other negative values may be returned to indicate fatal errors,
after which no more names can be returned. If a minor error occurs, a positive
value may be returned, indicating that the names of some files or members
could not be returned, but that another call to
osdnext
may successfully return additional names. For example, if
osdnext
is unable to return PDS members because
a PDS directory is corrupt,
osdnext
returns
a positive return code to indicate that it may be possible to return members
of other PDSs matching the pattern.
| CAUTION |
osdnext
assumes that the PDS directory for a (*) pattern will not be modified during
processing. If a write to the data set or member occurs during the execution
of
osdnext
, the results are unpredictable.
The results are also unpredictable if files or members matching the pattern
are added or deleted between the call to
osdnext
and the corresponding
osdquit
.
The first 16 bytes of the
DSNINFO
structure are reserved for use in subsequent calls to
osdnext
. Do not alter this area
because the
effects are unpredictable.
The catalog searches by
osdnext
use a 65K buffer to hold data set names. For this reason, all
matching filenames may not be returned if the highest level qualifier identifies
more than about 1,400 filenames. For example, if there are more than 1,400
files under the index ORDERS, then
osdnext
with the pattern ORDERS.*.LOG returns only matching names from the first 1,400.
This is a limitation of the operating system, not of SAS/C.
| EXAMPLE |
| RELATED FUNCTIONS |
| SEE ALSO |
|
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Copyright © 2001 by SAS Institute Inc., Cary, NC, USA. All rights reserved.