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.FILE EXISTS |
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.FILE EXISTS | ||||||||
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< < | PASS <exists?> FIELD SHARE? Y | |||||||
> > | PASS <exists?> FIELD SHARE? Y | |||||||
PASS <pathname> FIELD SHARE? N GOSUB --- .FILE EXISTS * check for errors |
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.FILE EXISTS |
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.FILE EXISTS | ||||||||
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Description: | ||||||||
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< < | This subroutine must be passed two fields. One to return a Y or N if the files exists or not and one defining the pathname to delete. | |||||||
> > | This subroutine is called to check if a file exists in the filesystem. Both parameters are required, the subroutine will CANCEL if they are not received. | |||||||
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< < | <exists?> identifies the field to return if the file exists or not. Passing this parameter is required. | |||||||
> > | <exists?> is the result, indicating if file exists or not (Required). This must be PASSed with Share "Y". Returns Y if the file exists, N if not. | |||||||
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< < | <pathname> identifies the field that identifies the pathname to test. Passing this parameter is required. | |||||||
> > | <pathname> is pathname to test (Required). | |||||||
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< < | This subroutine sets a result value in the corresponding results Token field. | |||||||
> > | Notes: The subroutine tries to open the file for Read access, and if it cannot, it returns a "N". It cannot distinguish between a file that does not exist and a file it cannot open due to file permissions, both cases will return "N". You can also use this to test if a directory exists by passing a directory name. | |||||||
Comments:Read what other users have said about this page or add your own comments. |
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> > |
.FILE EXISTSThis subroutine is called to check if a file exists in the filesystem.Usage:PASS <exists?> FIELD SHARE? Y PASS <pathname> FIELD SHARE? N GOSUB --- .FILE EXISTS * check for errors IF --- .FILE EXISTS NE Description:This subroutine must be passed two fields. One to return a Y or N if the files exists or not and one defining the pathname to delete. <exists?> identifies the field to return if the file exists or not. Passing this parameter is required. <pathname> identifies the field that identifies the pathname to test. Passing this parameter is required. This subroutine sets a result value in the corresponding results Token field.Comments:Read what other users have said about this page or add your own comments.-- PeteBrower - 2011-08-12 |