NAME¶

yash - Yet Another Shell

SYNOPSIS¶

yash [options] [filename [args...]] yash [options] -c command [command_name [args...]] yash [options] -s [args...]

DESCRIPTION¶

yash is a command line shell that conforms to the POSIX.1 (IEEE Std 1003.1, 2008 Edition) standard for the most part. Actually, it is much more POSIX-compliant than other shell like bash and zsh. yash also has its own features beyond POSIX, such as:
* global aliases
* random numbers
* socket redirections and other special redirections
* right prompt
* command completion

OPTIONS¶

set - set shell options and positional parameters
set [-abefhmnuvxC] [+abefhmnuvxC] [-o option] [+o option] [--] [arg...]
set -o
set +o The first form enables or disables the specified shell options and/or sets positional parameters to <arg>s. If no <arg>s are given, the positional parameters are not changed. If no options or <arg>s are given at all, a list of all existing variables is printed. To clear all positional parameters, use `set --'. The second form prints the current settings of the shell options in a human- readable form. The third form prints commands that can be used to restore the current option settings later.

-h, --help

Show this help message and exit

-a --allexport

Any variable is exported when assigned.

-b --notify

When the status of a job is changed, it is notified immediately.

--notifyle

Similar to -b, but only notify during line-editing. Ignored if -b is set.

-e --errexit

Exit the shell immediately when any simple command returns a non-zero status.

+f --glob

Perform pathname expansion (globbing).

--caseglob

Perform pathname expansion case-sensitively.

--dotglob

In pathname expansion, `*' and `?' match a `.' at the beginning of the filename.

--markdirs

In pathname expansion, directory pathnames have a `/' at the ends.

--extendedglob

Enable extended pathname expansion.

--nullglob

In pathname expansion, patterns that do not match any pathname are removed from the command line rather than left as is.

-h --hashondef

When a function is defined, all the commands in the function are registered in the command path cache.

-m --monitor

Enable job control. All jobs are run in their own process group. When the status of a job is changed, the status is reported before the next prompt. This option is enabled by default for an interactive shell.

+n --exec

Execute commands. This option cannot be disabled in an interactive shell.

+u --unset

Expand an undefined variable to an empty string.

-v --verbose

Echo each command to the standard error before execution.

-x --xtrace

After each command line is expanded, the expanded line is printed to the standard error.

+C --clobber

Allow redirections to overwrite existing files.

--ignoreeof

Do not exit when an EOF is entered. This option is effective in an interactive shell only.

--braceexpand

Enable brace expansion.

--curasync, --curbg, --curstop

A background job becomes the current job when

 

(curasync) invoked as an asynchronous command

 

(curbg) resumed by the bg built-in

 

(curstop) stopped.

 

(These options are enabled by default)

--histspace

Do not save lines that start with a space in the history.

--posixly-correct

Make the shell behave as the POSIX shell.

--vi

Enable vi-like editing.

--emacs

Enable emacs-like editing.

--le-convmeta

Treat 8th bit of input as a meta-key flag (regardless of terminfo).

--le-noconvmeta

Do not treat 8th bit of input as a meta-key flag.

--le-visiblebell

Alert with a flash rather than a bell.

--le-promptsp

Move cursor to beginning of line each time when starting line-editing. (enabled by default)

--le-alwaysrp

Make the right prompt always visible on the screen.

--le-compdebug

Print debugging information during command line completion.

Options can be disabled by using `+' instead of `-'. For example, `set +a' or `set ++allexport' disables the allexport option. Prefixing `no' to a long option also disables the option. For example, `set --nounset' disables the unset option.

AUTHOR¶

yash was written by Magicant <magicant@users.sourceforge.jp>. This manual page was written by Khalid El Fathi <khalid@elfathi.fr>, for the Debian project (and may be used by others).