YASH(1) General Commands Manual YASH(1)
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).
May 17, 2012 YASH(1)