Documentation for routine
shell assembled from the following types:
sub shell( --> Proc)
Runs a command through the system shell, which defaults to
%*ENV<ComSpec> /c in Windows,
/bin/sh -c otherwise. All shell meta characters are interpreted by the shell, including pipes, redirects, environment variable substitutions and so on. Shell escapes are a severe security concern and can cause confusion with unusual file names. Use run if you want to be safe.
The return value is of type Proc.
shell 'ls -lR | gzip -9 > ls-lR.gz';
See Proc for more details, for example on how to capture output.
method shell(, : = , : --> Bool)
Proc object with the given command and environment which are passed through to the shell for parsing and execution. See
IO::shell for an explanation of which shells are used by default in the most common operating systems.