${var}

The value of variable var.

${var[i]}

Select word or words in position i of var. i can be a single number, a range m-n, a range -n (missing m implies 1), a range m- (missing n implies all remaining words), or * (select all words). i also can be a variable that expands to one of these values.

${#var}

The number of words in var.

${#argv}

The number of arguments.

$0

Name of the program.

${argv[n]}

Individual arguments on command line (positional parameters); 1 ≤ n ≤ 9.

${n}

Same as ${argv[n]}.

${argv[*]}

All arguments on command line.

$*

Same as {$argv[*]}.

$argv[$#argv]

The last argument.

${?var}

Return 1 if var is set, 0 if not.

$$

Process number of current shell; useful as part of a filename for creating temporary files with unique names.

${?name}

Return 1 if name is set, 0 if not.

$?0

Return 1 if input filename is known, 0 if not.

addsuffix

Append / to directories and a space to files during tab completion to indicate a precise match.

afsuser

Set value to be used instead of the local username for Kerberos authentication with the autologout locking feature.

ampm

Display all times in 12-hour format.

argv=(args)

List of arguments passed to current command; default is ( ).

autocorrect

Check spelling before attempting to complete commands.

autoexpand

Expand history (such as ! references) during command completion.

autolist[=ambiguous]

Print possible completions when correct one is ambiguous. If ambiguous is specified, print possible completions only when completion adds no new characters.

autologout=logout-minutes [locking-minutes]

Log out after logout-minutes of idle time. Lock the terminal after locking-minutes of idle time, requiring a password before continuing. Not used if the DISPLAY environment variable is set.

backslash_quote

Always allow backslashes to quote \, ', and ".

catalog

Use tcsh.${catalog} as the filename of the message catalog. The default is tcsh.

cdpath=dirs

List of alternate directories to search when locating arguments for cd, popd, or pushd.

color

Turn on color for ls-F, ls, or both. Setting to nothing is equivalent to setting for both.

colorcat

Enable color escape sequence for Native Language System (NLS) support and display NLS messages in color.

command

If set, hold the command passed to the shell with the -c option.

complete=enhance

When enhance, ignore case in completion, treat ., -, and _ as word separators, and consider _ and - to be the same.

continue=cmdlist

If set to a list of commands, continue those commands instead of starting new ones.

continue_args=cmdlist

Like continue, but execute the following:

echo `pwd` $argv > ~/.cmd_pause; %cmd

correct={cmd|complete|all}

When cmd, spellcheck commands. When complete, complete commands. When all, spellcheck whole command line.

cwd=dir

Full pathname of current directory.

dextract

When set, the pushd command extracts the desired directory and puts it at the top of the stack instead of rotating the stack.

dirsfile=file

History file consulted by dirs -S and dirs -L. Default is ~/.cshdirs.

dirstack

Directory stack, in array format. dirstack[0] is always equivalent to cwd. The other elements can be artificially changed.

dspmbyte=code

Enable use of multibyte code; for use with Kanji. See the tcsh manpage for details.

dunique

Make sure that each directory exists only once in the stack.

echo

Redisplay each command line before execution; same as csh -x command.

echo_style={bsd|sysv|both|none}

Don't echo a newline with -n option (bsd), parse escaped characters (sysv), do both, or do neither.

edit

Enable command-line editor. Set by default for interactive shells.

ellipsis

For use with prompt variable. Use ... to represent skipped directories.

fignore=suffs

List of filename suffixes to ignore during filename completion.

gid

User's group ID.

group

User's group name.

histchars=ab

A two-character string that sets the characters to use in history substitution and quick substitution (default is !^).

histdup={all|prev|erase}

Maintain a record only of unique history events (all), do not enter a new event when it is the same as the previous one (prev), or remove an old event that is the same as the new one (erase).

histfile=file

History file consulted by history -S and history -L. Default is ~/.history.

histlit

Do not expand history lines when recalling them.

history=n format

The first word indicates the number of commands to save in the history list. The second indicates the format with which to display that list (see Section 8.4.4 for possible formats).

home=dir

Home directory of user, initialized from HOME. The ~ character is shorthand for this value.

ignoreeof

Ignore an end-of-file (EOF) from terminals; prevents accidental logout.

implicitcd

If directory name is entered as a command, cd to that directory. Can be set to verbose to echo the cd to standard output.

inputmode={insert|overwrite}

Control editor's mode.

killdup={all|prev|erase}

Enter only unique strings in the kill ring (all), do not enter new string when it is the same as the current killed string (prev), or erase from the kill ring an old string that is the same as the current string (erase).

killring=num

Set the number of killed strings to keep in memory to num. The default is 30. If unset or set to a number less than 2, keep only the most recent killed string.

listflags=flags

One or more of the x, a, or A options for the ls-F built-in command. Second word can be set to path for ls command.

listjobs[=long]

When a job is suspended, list all jobs (in long format, if specified).

listlinks

In ls -F command, include type of file to which links point.

listmax=num

Do not allow list-choices to print more than num choices before prompting.

listmaxrows=num

Do not allow list-choices to print more than num rows of choices before prompting.

loginsh

Set if shell is a login shell.

logout

Indicates status of an imminent logout (normal, automatic, or hangup).

mail=(n files)

One or more files checked for new mail every 5 minutes or (if n is supplied) every n seconds.

matchbeep={never|nomatch|ambiguous|notunique}

Specifies circumstances under which completion should beep: never, if no match exists, if multiple matches exist, or if multiple matches exist and one is exact. If unset, ambiguous is used.

nobeep

Disable beeping.

noclobber

Don't redirect output to an existing file; prevents accidental destruction of files.

noding

Don't print "DING!" in prompt time specifiers when the hour changes.

noglob

Turn off filename expansion; useful in shell scripts.

nokanji

Disable Kanji (if supported).

nonomatch

Treat filename metacharacters as literal characters if no match exists (e.g., vi ch* creates new file ch* instead of printing "No match").

nostat=directory-list

Do not stat directory-list during completion.

notify

Declare job completions when they occur.

owd

Old working directory.

path=(dirs)

List of pathnames in which to search for commands to execute. Initialized from PATH; the default is . /usr/ucb /usr/bin.

printexitvalue

Print all nonzero exit values.

prompt='str'

String that prompts for interactive input; default is %. See Section 8.4.4 later in this chapter for formatting information.

prompt2='str'

String that prompts for interactive input in foreach and while loops and continued lines (those with escaped newlines). See Section 8.4.4 for formatting information.

prompt3='str'

String that prompts for interactive input in automatic spelling correction. See Section 8.4.4 for formatting information.

promptchars=cc

Use the two characters specified as cc with the %# prompt sequence to indicate normal users and the superuser, respectively.

pushdsilent

Do not print directory stack when pushd and popd are invoked.

pushdtohome

Change to home directory when pushd is invoked without arguments.

recexact

Consider completion to be concluded on first exact match.

recognize_only_executables

When command completion is invoked, print only executable files.

rmstar

Prompt before executing the command rm *.

rprompt=string

The string to print on the right side of the screen while the prompt is displayed on the left. Specify as for prompt.

savedirs

Execute dirs -S before exiting.

savehist=max [merge]

Execute history -S before exiting. Save no more than max lines of history. If specified, merge those lines with previous history saves, and sort by time.

sched=string

Format for sched's printing of events. See Section 8.4.4 for formatting information.

shell=file

Pathname of the shell program.

shlvl

Number of nested shells.

status=n

Exit status of last command. Built-in commands return 0 (success) or 1 (failure).

symlinks={chase|ignore|expand}

Specify manner in which to deal with symbolic links. Expand them to real directory name in cwd (chase), treat them as real directories (ignore), or expand arguments that resemble pathnames (expand).

tcsh

Version of tcsh.

term

Terminal type.

time='n %c'

If command execution takes more than n CPU seconds, report user time, system time, elapsed time, and CPU percentage. Supply optional %c flags to show other data.

tperiod

Number of minutes between executions of periodic alias.

tty

Name of tty, if applicable.

uid

User ID.

user

Username.

verbose

Display a command after history substitution; same as tcsh -v.

version

Shell's version and additional information, including options set at compile time.

visiblebell

Flash screen instead of beeping.

watch=([n] user terminal...)

Watch for user logging in at terminal, where terminal can be a tty name or any. Check every n minutes, or 10 by default.

who=string

Specify information to be printed by watch.

wordchars=chars

List of all nonalphanumeric characters that may be part of a word. Default is *?_-.[ ]~=.