The number of the highest-numbered stream present. Reject undocumented options. Last record not written when it is shorter than the beginning of any of the ranges. This instructs built-in programs to retain null records on input and not to discard null records on output. Several mode letters are written with blanks between them.
Ranges list the records to read.
After the argument ranges are processed, input records are read. Input records have additional ranges to process. With feedback it is possible to implement search engines using binary search and hashed searches. Read physical blocks from a minidisk. Ranges list the blocks to read.