shell.pl -- Elementary shell commands
This library provides some basic (POSIX) shell commands defined in
Prolog, such as pwd and ls for situations where there is no shell
available or the shell output cannot be captured.
- shell
- Execute an interactive shell. The following options are tried to
find a suitable shell command:
- The Prolog flag
shell
- The environment variable
$SHELL
- The Prolog flag
posix_shell
- The environment variable
%comspec% (Windows only)
- Errors
- -
existence_error(config, shell) if no suitable shell can be
found.
- cd
- cd(Dir)
- Change working directory
- pushd
- pushd(+Dir)
- popd
- dirs
- Manage the directory stack:
- pushd/1 is as cd/1, pushing th old directory on a stack
- pushd/0 swaps the current directory with the top of the
stack
- popd/0 pops to the top of the stack
- dirs/0 lists the current directory and the stack.
- pwd
- Print current working directory
- ls
- ls(+Pattern)
- Listing similar to Unix =ls -F=, flagging directories with =/=.
- mv(+From, +To) is det
- Move (Rename) a file. If To is a directory, From is moved into
the directory. Uses expand_file_name/2 on the From argument.
- rm(+File) is det
- Remove (unlink) a file
- name_to_file(+Name, -File)[private]
- Convert Name into a single file.
- warning(+Fmt, +Args:list) is det[private]
- table(+List, +Width)//[private]
- Produce a tabular layout to list all elements of List on lines
with a maximum width of Width. Elements are placed as
ls does:
1 4 7
2 5 8
3 6
- file_style(++File, =Style) is det[multifile]
- True when File should be listed as a terminal hyperlink. The default
only links Prolog source files.
- Arguments:
-
| Style | - is either url to make a hyperlink or a valid
style argument for ansi_format/3. |
- table_layout(+Items, +PageWidth, -Layout:dict) is det[private]
- Compute the number of columns, rows and the column width to create a
tabular layout for Items.