Macro lsfp2ds - WeAreCAS

This SAS^© macro, `lsfp2ds`, is designed to list Unix/Linux file names with their full paths and save them to a SAS^© dataset. It accepts a positional parameter, `filepattern`, which specifies the file pattern to search for. An optional second positional parameter, `dsout`, allows defining the output dataset name; if omitted, it defaults to `_lsfp2ds`.
The resulting dataset will contain two variables: 'filename', which stores the full file path, and 'lcfname', a lowercase version of the file name (without the path prefix), useful for verifications. The `lsfp2ds` macro is a wrapper that internally calls the `%lsfp2sas^©` macro to perform the main logic.

Data Analysis

Type : CREATION_INTERNE

The macro generates a SAS dataset whose content is derived from file system metadata (list of Unix/Linux files) rather than from a direct read of a pre-existing external dataset. The data is dynamically constructed within SAS from operating system information.

1 Code Block

MESSAGE LOG

Explanation :
This block writes an informational message to the SAS log, indicating the call of the 'lsfp2ds' macro with its version. This is a common practice for debugging and execution tracking.

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1	%put MACRO CALLED: lsfp2ds v1.0;

2 Code Block

MACRO DEFINITION

Explanation :
This block defines the `lsfp2ds` macro. It manages the output dataset name by assigning `_lsfp2ds` by default if the `dsout` parameter is not provided. The main task of listing files and creating the dataset is delegated to another macro, `%lsfp2sas`, which is called with the `filepattern` and the finalized `dsout` parameters.

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1	%macro lsfp2ds(filepattern,dsout);
2	%IF not %LENGTH(&dsout) %THEN %let dsout=_lsfp2ds;
3	%lsfp2sas(&filepattern,&dsout)
4	%mend lsfp2ds;

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