Lexmark T620 Technical Reference - Page 202
create a file if it does not exist or append it if it does exist. File is
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4-35 PostScript file filename access file file creates a file object with specified filename and access. The access values are: r open the file for reading only w create a file if one does not already exist, or truncate and overwrite it if it does exist. File is opened for writing only. a create a file if one does not already exist or append it if it does exist. File is opened for writing only. r+ open the file for reading and writing. An undefinedfilename error occurs if the file does not exist. w+ create a file if it does not already exist, or truncate and overwrite if it does exist. File is opened for reading and writing. a+ create a file if it does not exist or append it if it does exist. File is opened for reading and writing. This operator is in systemdict. Errors: invalidfileaccess, ioerror, limitcheck, stackunderflow, typecheck, undefinedfilename Note: An undefinedfilename error occurs if the file does not exist. filenameforall pattern proc scratchstring filenameforall lists all the files with names that match a specified pattern string, copies the filename for each of these files into a specified scratch string, and calls a specified proc procedure. This operator is in systemdict. Errors: ioerror, stackoverflow, stackunderflow, typecheck fileposition file fileposition position indicates the current position on an open file. This operator is in systemdict. Errors: ioerror, stackunderflow, typecheck, undefinedfilename Note: An undefinedfilename error occurs if the file does not exist.