4 split \- split a file into pieces
17 (standard input by default)
18 and writes it in pieces of 1000
19 lines per output file.
37 a nod to Unix's syntax.
40 File divisions occur at each line
41 that matches a regular
50 is contained in parentheses
52 the output file name is the portion of the
53 line which matches the subexpression.
65 to names identified under
69 Exclude the matched input line from the output file.
74 force output file names (excluding the suffix)
77 .B /sys/src/cmd/split.c