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PsL Monthly 1994 February
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DELTREE.CMD
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OS/2 REXX Batch file
|
1993-07-02
|
5KB
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110 lines
@echo off
REM *******************************************************************
REM *** DelTree - Delete a subdirectory and all files in it, and ***
REM *** recursively delete all subdirectories within that ***
REM *** subdirectory. You may look at DelTree1.cmd and ***
REM *** DelTree2.cmd for other methods of doing the ***
REM *** same thing by using temporary files. ***
REM *******************************************************************
if "%1"=="" GOTO SHOW_HOW
REM *******************************************************************
REM *** The user could be very unhappy to delete lots of files they ***
REM *** didn't really want to delete, and so give them a chance to ***
REM *** change their mind. ***
REM *******************************************************************
ECHO THIS WILL DELETE ALL FILES AND DIRECTORIES UNDER %1
CALL GetUKey.cmd "ARE YOU SURE YOU WANT TO DO THIS DELETE ALL THOSE INNOCENT FILES? (Y/N)" yn
if N==%UKEY% GOTO FINI
REM *********************************************************************
REM *** Check that this is a valid subdirectory. This can be handled ***
REM *** by calling another CEnvi program: ValidDir.cmd ***
REM *********************************************************************
CEnvi ValidDir.cmd %1 COMPLAIN
if ERRORLEVEL 1 GOTO FINI
REM ******************************************************************
REM *** It will be simpler to delete files if we make sure that no ***
REM *** attributes are set that would make them undeletable. The ***
REM *** easy way to change this is to let the DOS attrib function ***
REM *** clear all of these attributes for us. ***
REM ******************************************************************
attrib -H -S -R %1\*.* /s > NUL
REM **************************************************************************
REM *** Temporarily turn off DELDIR to make this deletion fast (if unsafe) ***
REM **************************************************************************
SETLOCAL
set DELDIR=
REM ******************************************************************
REM *** The rest of this task will be handled by CEnvi, which will ***
REM *** create a list of all directories and then call the command ***
REM *** shell to delete the files in each directory. ***
REM ******************************************************************
CEnvi %0.cmd %1
GOTO CENVI_EXIT
main(argc,argv)
{
// build a sorted list of all subdirectories under the specified directory
DirCount = BuildSubdirList(argv[1],DirList)
if ( DirCount != 0 ) {
// sort the subdir list in reverse alphabetic order, which insures that
// subdirectoies of a directory appear before its parent directory
qsort(DirList,DirCount,"ReverseSortDirnames")
// for each subdirectory, call command shell to delete all files in it
// and then remove the directory
for ( i = 0; i < DirCount; i++ ) {
DeleteAllFilesInDir( DirList[i].name );
RemoveDirectory( DirList[i].name );
}
}
// all subdirectories have have been deleted, then delete the input subdir
DeleteAllFilesInDir( argv[1] );
RemoveDirectory( argv[1] );
}
BuildSubdirList(BaseDir,List) // build List of all subdirectories under BaseDir
{ // return count of elements in list
sprintf(SearchSpec,"%s\\*",BaseDir)
List = Directory(SearchSpec,TRUE,
FATTR_RDONLY|FATTR_HIDDEN|FATTR_SYSTEM|FATTR_SUBDIR|FATTR_ARCHIVE,
FATTR_SUBDIR)
return( ( List == NULL ) ? 0 : 1+GetArraySpan(List) );
}
ReverseSortDirnames(Dir1,Dir2) // repeatedly called by qsort to sort Dir1 and Dir2
{
return( stricmp(Dir2.name,Dir1.name) );
}
DeleteAllFilesInDir(DirName) // call system to delete all files in this dir
{
printf("DEL %s\n",DirName)
system("echo Y | del %s > NUL",DirName)
}
RemoveDirectory(DirName) // call system RMDIR call
{
printf("RMDIR %s\n",DirName)
system("RMDIR %s > NUL",DirName)
}
:CENVI_EXIT
REM **********************
REM *** Restore DELDIR ***
REM **********************
ENDLOCAL
GOTO FINI
:SHOW_HOW
ECHO
ECHO DelTree.cmd - Delete a subdirectory and all files and directories under it
ECHO
GOTO FINI
:FINI
SET UKEY=