The input is considered a byte stream. The line end character is removed from the logical records when they are written to the output stream. Logical records can span blocks, as can the line end sequence. A null record is written for two consecutive carriage return line feed sequences. The input is considered a byte stream.
Logical records can span blocks, as can the separator string.
A null record is written for two consecutive occurrences of the speci- fied string. The input is considered a byte stream. Records are read from the primary input stream and written to the primary output stream. Null input records are discarded. . The delay is unspecified.