Returns the name of an information item for an external file.
| Category: | External Files |
| Windows specifics: | available information items |
| See: | FOPTNAME Function in SAS Functions and CALL Routines: Reference |
specifies the identifier that was assigned when the file was opened, generally by the FOPEN function.
specifies the number of the file information item to be retrieved. The following table shows the values that nval can have for single and concatenated files under Windows operating environments.
|
nval
|
Single File
|
Pipe Files
|
Concatenated Files
|
|
1
|
Filename
|
Unnamed pipe access device
|
Filename
|
|
2
|
RECFM
|
PROCESS
|
RECFM
|
|
3
|
LRECL
|
RECFM
|
LRECL
|
|
4
|
|
LRECL
|
|
data fileatt;
filename mypipe pipe 'dir';
fid=fopen("mypipe","s");
/* fid should be non—zero. 0 indicates failure */
put "File id is: " fid=;
numopts=foptnum(fid);
put "Number of information items should be 4; " numopts=;
do i=1 to numopts;
optname=foptname(fid,i);
put i= optname=;
optval=finfo(fid,optname);
put optval=;
end;
rc=fclose(fid);
run;NOTE: PROCEDURE PRINTTO used (Total process time):
real time 0.03 seconds
cpu time 0.01 seconds
6 data fileatt;
7 filename mypipe pipe 'dir';
8 fid=fopen("mypipe","s");
9 /* fid should be non-zero. 0 indicates failure */
10 put "File id is: " fid=;
11 numopts=foptnum(fid);
12 put "Number of information items should be 4; " numopts=;
13 do i=1 to numopts;
14 optname=foptname(fid,i);
15 put i= optname=;
16 optval=finfo(fid,optname);
17 put optval=;
18 end;
19
20 rc=fclose(fid);
21 run;
File id is: fid=1
Number of information items should be 4; numopts=4
i=1 optname=Unnamed Pipe Access Device
optval=
i=2 optname=PROCESS
optval=dir
i=3 optname=RECFM
optval=V
i=4 optname=LRECL
optval=32767
NOTE: The data set WORK.FILEATT has 1 observations and 6 variables.
NOTE: DATA statement used (Total process time):
real time 9.64 seconds
cpu time 1.16 seconds
22 proc printto; run;