read - read from standard input with optional seek read [ - [ eor ] offset ] [ count ] Read does a single read of count bytes (default: 8192 bytes) from the standard input and writes the result to the standard output. If the optional offset argument is given, read will first apply sys-seek (2):

-o " offset" seek offset bytes from the start of the file

-e " offset" seek offset bytes from the end of the file

-r " offset" seek offset bytes from the standard input's current file offset

In all cases the file offset changes to reflect the result of the seek, and the number of bytes read.

/appl/cmd/read.b Read prints a diagnostic and returns a non-empty exit status .L fail:error on an I/O error; it quietly returns status .L fail:eof if the read returns zero bytes (conventionally, end of file). cat (1), getline in sh-std (1), stream (1), sys-read (2)