Attention : This code requires administrator privileges.
This SAS© macro, named `ClearTEMPWORK`, is designed to check for the existence of a specific directory (`c:\tempwork`) on a Windows operating system. If the directory exists, it attempts to release any potential `tempwork` libname (if assigned to this path) then uses the system commands `del` and `rd` via `%sysexec` to recursively delete all files and subdirectories contained in `c:\tempwork`, as well as the directory itself. Although the code can technically be executed on SAS© Viya™ 4 if `%sysexec` is enabled and if Viya™ is deployed on Windows, it is highly dependent on the Windows environment and the use of `%sysexec` is generally restricted for security reasons in Viya™ production environments.
Data Analysis
Type : N/A
This macro does not directly process SAS data but interacts with the server's file system for managing a temporary directory. No SAS data sources are read or written by this macro.
1 Code Block
MACRO
Explanation :
This block defines the `ClearTEMPWORK` macro. It declares a local variable `rc`. It uses `%sysfunc(fileexist)` to check if the path `c:\tempwork` exists. If the directory exists (`&rc ne 0`), the code attempts to free a potential SAS libname named `tempwork` using `%sysfunc(libname(tempwork))`. Then, it uses `%sysexec` to execute Windows operating system commands: `del /Q "c:\tempwork\*.*"` to silently delete all files and `rd /Q "c:\tempwork"` to silently delete the empty directory. It is crucial to note that this macro is Windows-specific and that the use of `%sysexec` is often disabled or subject to strict restrictions in SAS Viya 4 environments for security and portability reasons.
This block defines the `ClearTEMPWORK` macro. It declares a local variable `rc`. It uses `%sysfunc(fileexist)` to check if the path `c:\tempwork` exists. If the directory exists (`&rc ne 0`), the code attempts to free a potential SAS libname named `tempwork` using `%sysfunc(libname(tempwork))`. Then, it uses `%sysexec` to execute Windows operating system commands: `del /Q "c:\tempwork\*.*"` to silently delete all files and `rd /Q "c:\tempwork"` to silently delete the empty directory. It is crucial to note that this macro is Windows-specific and that the use of `%sysexec` is often disabled or subject to strict restrictions in SAS Viya 4 environments for security and portability reasons.
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| 1 | %macro ClearTEMPWORK; |
| 2 | %local rc; |
| 3 | %let rc=%sysfunc(fileexist("c:\tempwork")); |
| 4 | %IF &rc ne 0 %THEN %DO; |
| 5 | %let rc=%sysfunc(LIBNAME(tempwork)); |
| 6 | %sysexec del /Q "c:\tempwork\*.*"; |
| 7 | %sysexec rd /Q "c:\tempwork"; |
| 8 | %END; |
| 9 | %mend cleartempwork; |
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