win must be able to connect to a running wily(1). win attaches to a window. If the -t option is
present, the final part of the tag name is name. If command is present, the final part of the tag name
is +command. Otherwise, the final part of the tag name is +win. The first part of the tag name is the
current working directory.
win runs a program in a child process. The child process is the leader of a process group and is
connected to win by a pseudo-terminal. If command is specified, the child process runs
$SHELL -c 'command argument ...'
otherwise it runs
$SHELL -i
If SHELL is not found in the environment, /bin/sh is used.
TERM=win is placed in the environment of the running program.
Output from the running command appears in the window. The point after the last output from the running
command is known as the output point. Further output from the running command appears just before the
output point. The output point is initially at the end of the window.
Normal wily editing commands work in the window. When a newline, interrupt character, or end-of-file
character is created after the output point, the text between the output point and the last newline,
interrupt character, or end-of-file character in the window (inclusive) is passed to the running program
as input.
The interrupt character is control-C and the end-of-file character is control-D. The pseudo-terminal
initially is configured so that these are recognized with their normal meanings.
The B2 commands beginning with the |, <, or > characters or an upper case letter are executed normally by
wily. Other B2 are first terminated with a newline, if they are not already, and are then appended to
the buffer (and thereafter passed to the running program).