Check that file exists: Difference between revisions
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→{{header|PL/M}}: Removed some unused declarations
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CP/M doesn't have a hierarchical file-system, so there are no folders or directories. This sample looks for INPUT.TXT on the current drive and also on the D: drive. An error will occur if there is no D: drive, so it is best not to run this if you haven't got one... :)
<br>Note that CP/M restricts file names to 7-bit ascii upper-case and not all non-letter, non-digit characters can be used.
<br>CP/M filenames are up to 8 characters long with an optional, up to three character extension.
<lang plm>100H:
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EXISTS: PROCEDURE( FCB )BYTE; /* RETURNS TRUE IF THE FILE NAMED IN THE */
DECLARE FCB ADDRESS; /* FCB EXISTS */
RETURN ( SEARCH$FIRST( FCB ) < 4 );
END EXISTS ;
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