Create a SAS dataset from a list of Unix/Linux files

Attention : This code requires administrator privileges.

This macro, `%ls2ds`, is a wrapper that uses another unprovided macro, `%ls2sas^©`, to accomplish its task. It takes a file pattern (`filepattern`) and an output dataset name (`dsout`, by default '_ls2ds'). Its purpose is to capture a list of filenames from the file system (via the 'LS -1' command) and transform it into a SAS^© dataset. The output dataset is expected to contain the variables 'filename' (filename as listed) and 'lcfname' (lowercase version for verification). Executing external system commands ('LS -1') generally implies administrative privileges or specific capabilities of the SAS^© environment.

Data Analysis

Type : INTERNAL_CREATION

The output dataset is created internally by the macro from a list of files obtained directly from the Unix/Linux file system via the 'LS -1' command. The data does not come from pre-existing external SAS sources to the script, but is generated from operating system information.

1 Code Block

MACRO Data

Explanation :
This block defines the `%ls2ds` macro. It handles an optional `dsout` parameter, assigning it the default value `_ls2ds` if none is provided. It then calls the `%ls2sas` macro, which is supposed to contain the actual logic to query the file system and create the SAS dataset from the file pattern and output dataset name.

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1	%put MACRO CALLED: ls2ds v1.0;
2
3	%macro ls2ds(filepattern,dsout);
4	%IF not %LENGTH(&dsout) %THEN %let dsout=_ls2ds;
5	%ls2sas(&filepattern,&dsout)
6	%mend ls2ds;

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