Support for Links in UNIX Environments

SAS provides limited support for hard links and symbolic links in UNIX environments. You can create links that point to a SAS data set or SAS catalog. If you reference the link in a SAS program, SAS will follow the link to find the data set or catalog.

For example, you can create a symbolic link in the /tmp directory to the /home/ user /mydata.sas7bdat data set by typing the following command at the UNIX prompt:

 ln -s /home/user/mydata.sas7bdat /tmp/mydata.sas7bdat 

The following SAS code uses the symbolic link in the /tmp directory to find the mydata.sas7bdat data set. This code does not change the symbolic link, but it does sort the data in the data set.

 libname tmp '/tmp';   proc sort data=tmp.mydata;      by myvariable;   run; 

If you are running in the SAS windowing environment, you can use the Explorer window to view the symbolic links that are stored within a specific directory. Any symbolic link that points to a nonexistent SAS file will have a file size of 0.0KB and a modified date of 31DEC59:19:00:00 .

Note  

SAS does not support links for a data set that has any of the following:

• an index

• version data sets.