Folder Creation and Data Copy

Attention : This code requires administrator privileges.

The script includes a macro named `create_newfolder` which takes a folder path as a parameter. This macro checks for the existence of the folder; if it does not exist, it determines the operating system (Windows or Linux) via `&sysscp` and executes the appropriate system command (`md` or `mkdir -p`) to recursively create the folder. After the macro definition, the script creates a folder `D:\SAS^©\mactest`, assigns a SAS^© library named `mylib` to it, and then copies the `CLASS` dataset from the `SASHELP` library to `mylib.class`.

Data Analysis

Type : SASHELP

The script uses the `CLASS` dataset from the internal `SASHELP` library.

1 Code Block

MACRO DEFINITION

Explanation :
This block defines the `create_newfolder` macro. It takes one argument `newfld` (the path to the folder to create). It uses `%sysfunc(fileexist())` to check if the folder already exists. If not, it uses `%sysexec` with `md` (for Windows) or `mkdir -p` (for Linux) to create the folder. The use of `%sysexec` is an administrative function allowing system commands execution and requires appropriate privileges.

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1	%macro create_newfolder(newfld);
2
3	%*---------------------------------------------------------;
4	%*check for the existence of the folder;
5	%*---------------------------------------------------------;
6
7	%IF %sysfunc(fileexist(&newfld)) %THEN %put NOTE:The directory "&newfld" already EXISTS.;
8
9	%*---------------------------------------------------------;
10	%*create the folder(s) recursively IF absent;
11	%*---------------------------------------------------------;
12	%ELSE %DO;
13	%*---------------------------------------------------------;
14	%*check the operating system and use the OS specific command;
15	%*---------------------------------------------------------;
16	%IF "%bquote(%substr(&sysscp,1,3))"="WIN" %THEN %sysexec md "&newfld";
17	%ELSE %IF "%bquote(%substr(&sysscp,1,3))"="LIN" %THEN %sysexec mkdir -p "&newfld";
18
19	%put NOTE:The directory "&newfld" has been CREATED.;
20	%END;
21
22
23	%mend csg_create_newfolder_001;

2 Code Block

MACRO CALL / LIBNAME

Explanation :
This block calls the `create_newfolder` macro to create the `D:\SAS\mactest` folder. Then, it assigns the `mylib` library name to this new folder, making it accessible for SAS operations.

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1	%create_newfolder(D:\SAS\mactest);
2
3	LIBNAME mylib "D:\SAS\mactest";
4

3 Code Block

DATA STEP Data

Explanation :
This DATA STEP block copies the `CLASS` dataset from the SASHELP library (implicitly, as `set class;` without a qualified libname refers to `SASHELP.CLASS` if `WORK.CLASS` does not exist) to the new `mylib` library, thereby creating `mylib.class` in the `D:\SAS\mactest` folder.

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1	DATA mylib.class;
2	SET class;
3	RUN;

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