https://github.com/jrincayc/ucblogo-code
Tip revision: 62fc2f7d6c41edcf685277a872c68e47a76fb254 authored by Dan Malec on 12 December 2020, 01:50:52 UTC
FEAT-CD: Initial pass at having a CD build.
FEAT-CD: Initial pass at having a CD build.
Tip revision: 62fc2f7
shell
SHELL command
(SHELL command wordflag)
Under Unix, outputs the result of running "command" as a shell
command. (The command is sent to /bin/sh, not csh or other
alternatives.) If the command is a literal list in the instruction
line, and if you want a backslash character sent to the shell, you
must use \\ to get the backslash through Logo's reader intact. The
output is a list containing one member for each line generated by
the shell command. Ordinarily each such line is represented by a
list in the output, as though the line were read using READLIST. If
a second input is given, regardless of the value of the input, each
line is represented by a word in the output as though it were read
with READWORD. Example:
to dayofweek
output first first shell [date]
end
This is "first first" to extract the first word of the first (and
only) line of the shell output.
Under MacOS X, SHELL works as under Unix. SHELL is not available
under Mac Classic.
Under DOS, SHELL is a command, not an operation; it sends its
input to a DOS command processor but does not collect the result
of the command.
Under Windows, the wxWidgets version of Logo behaves as under Unix (except
that DOS-style commands are understood; use "dir" rather than "ls").
The non-wxWidgets version behaves like the DOS version.