Provided by: zsh_4.3.17-1ubuntu1_amd64 bug

NAME

       zshoptions - zsh options

SPECIFYING OPTIONS

       Options  are  primarily  referred  to  by  name.   These  names  are  case insensitive and
       underscores are ignored.  For example, `allexport' is equivalent to `A__lleXP_ort'.

       The sense of an option name may be inverted by preceding it with `no', so `setopt No_Beep'
       is  equivalent to `unsetopt beep'.  This inversion can only be done once, so `nonobeep' is
       not a synonym for `beep'.   Similarly,  `tify'  is  not  a  synonym  for  `nonotify'  (the
       inversion of `notify').

       Some  options  also  have  one  or more single letter names.  There are two sets of single
       letter options: one used by default, and another used to emulate  sh/ksh  (used  when  the
       SH_OPTION_LETTERS  option  is  set).   The  single letter options can be used on the shell
       command line, or with the set, setopt  and  unsetopt  builtins,  as  normal  Unix  options
       preceded by `-'.

       The  sense of the single letter options may be inverted by using `+' instead of `-'.  Some
       of the single letter option names refer  to  an  option  being  off,  in  which  case  the
       inversion of that name refers to the option being on.  For example, `+n' is the short name
       of `exec', and `-n' is the short name of its inversion, `noexec'.

       In strings of single letter options supplied to the shell at startup, trailing  whitespace
       will  be  ignored;  for  example the string `-f    ' will be treated just as `-f', but the
       string `-f i' is an error.   This  is  because  many  systems  which  implement  the  `#!'
       mechanism for calling scripts do not strip trailing whitespace.

DESCRIPTION OF OPTIONS

       In  the following list, options set by default in all emulations are marked <D>; those set
       by default only in csh, ksh, sh, or zsh emulations  are  marked  <C>,  <K>,  <S>,  <Z>  as
       appropriate.   When listing options (by `setopt', `unsetopt', `set -o' or `set +o'), those
       turned  on  by  default  appear  in  the  list  prefixed   with   `no'.    Hence   (unless
       KSH_OPTION_PRINT  is  set), `setopt' shows all options whose settings are changed from the
       default.

   Changing Directories
       AUTO_CD (-J)
              If a command is issued that can't be executed as a normal command, and the  command
              is the name of a directory, perform the cd command to that directory.

       AUTO_PUSHD (-N)
              Make cd push the old directory onto the directory stack.

       CDABLE_VARS (-T)
              If  the  argument to a cd command (or an implied cd with the AUTO_CD option set) is
              not a directory, and does not begin with a slash, try to expand the  expression  as
              if it were preceded by a `~' (see the section `Filename Expansion').

       CHASE_DOTS
              When  changing  to a directory containing a path segment `..' which would otherwise
              be treated as canceling the previous segment in the path (in other words,  `foo/..'
              would  be removed from the path, or if `..' is the first part of the path, the last
              part of the current working directory would be removed), instead resolve  the  path
              to the physical directory.  This option is overridden by CHASE_LINKS.

              For  example,  suppose  /foo/bar is a link to the directory /alt/rod.  Without this
              option set, `cd /foo/bar/..' changes to /foo; with it set, it changes to /alt.  The
              same  applies  if the current directory is /foo/bar and `cd ..' is used.  Note that
              all other symbolic links in the path will also be resolved.

       CHASE_LINKS (-w)
              Resolve symbolic links to their true values when changing directory.  This also has
              the  effect of CHASE_DOTS, i.e. a `..' path segment will be treated as referring to
              the physical parent, even if the preceding path segment is a symbolic link.

       POSIX_CD
              Modifies the behaviour of cd, chdir and pushd commands to make them more compatible
              with  the  POSIX  standard. The behaviour with the option unset is described in the
              documentation for the cd builtin in zshbuiltins(1).  If  the  option  is  set,  the
              shell  does  not test for directories beneath the local directory (`.') until after
              all directories in cdpath have been tested.

              Also, if the option is set, the conditions under which the  shell  prints  the  new
              directory  after  changing  to  it  are  modified.   It  is no longer restricted to
              interactive shells (although printing of the directory stack with  pushd  is  still
              limited  to  interactive shells); and any use of a component of CDPATH, including a
              `.' but excluding an empty component that is otherwise treated as `.',  causes  the
              directory to be printed.

       PUSHD_IGNORE_DUPS
              Don't push multiple copies of the same directory onto the directory stack.

       PUSHD_MINUS
              Exchanges  the  meanings  of  `+'  and  `-'  when  used  with a number to specify a
              directory in the stack.

       PUSHD_SILENT (-E)
              Do not print the directory stack after pushd or popd.

       PUSHD_TO_HOME (-D)
              Have pushd with no arguments act like `pushd $HOME'.

   Completion
       ALWAYS_LAST_PROMPT <D>
              If unset, key functions that list completions try to return to the last  prompt  if
              given  a  numeric argument. If set these functions try to return to the last prompt
              if given no numeric argument.

       ALWAYS_TO_END
              If a completion is performed with the cursor within a word, and a  full  completion
              is  inserted,  the  cursor is moved to the end of the word.  That is, the cursor is
              moved to the end of the  word  if  either  a  single  match  is  inserted  or  menu
              completion is performed.

       AUTO_LIST (-9) <D>
              Automatically list choices on an ambiguous completion.

       AUTO_MENU <D>
              Automatically  use  menu  completion  after  the  second  consecutive  request  for
              completion, for example  by  pressing  the  tab  key  repeatedly.  This  option  is
              overridden by MENU_COMPLETE.

       AUTO_NAME_DIRS
              Any parameter that is set to the absolute name of a directory immediately becomes a
              name for that directory,  that  will  be  used  by  the  `%~'  and  related  prompt
              sequences,  and  will  be available when completion is performed on a word starting
              with `~'.  (Otherwise, the parameter must be used in the form `~param' first.)

       AUTO_PARAM_KEYS <D>
              If a parameter name was completed and a  following  character  (normally  a  space)
              automatically  inserted,  and the next character typed is one of those that have to
              come directly after the  name  (like  `}',  `:',  etc.),  the  automatically  added
              character  is  deleted,  so  that  the  character typed comes immediately after the
              parameter name.  Completion in a brace expansion is affected similarly:  the  added
              character is a `,', which will be removed if `}' is typed next.

       AUTO_PARAM_SLASH <D>
              If  a  parameter  is completed whose content is the name of a directory, then add a
              trailing slash instead of a space.

       AUTO_REMOVE_SLASH <D>
              When the last character resulting from  a  completion  is  a  slash  and  the  next
              character  typed  is  a word delimiter, a slash, or a character that ends a command
              (such as a semicolon or an ampersand), remove the slash.

       BASH_AUTO_LIST
              On an ambiguous completion, automatically list choices when the completion function
              is  called twice in succession.  This takes precedence over AUTO_LIST.  The setting
              of LIST_AMBIGUOUS is respected.  If AUTO_MENU is set, the menu behaviour will  then
              start with the third press.  Note that this will not work with MENU_COMPLETE, since
              repeated completion calls immediately cycle through the list in that case.

       COMPLETE_ALIASES
              Prevents aliases on the command  line  from  being  internally  substituted  before
              completion  is  attempted.   The effect is to make the alias a distinct command for
              completion purposes.

       COMPLETE_IN_WORD
              If unset, the cursor is set to the end  of  the  word  if  completion  is  started.
              Otherwise it stays there and completion is done from both ends.

       GLOB_COMPLETE
              When  the  current  word  has a glob pattern, do not insert all the words resulting
              from the expansion but generate matches as for completion and  cycle  through  them
              like  MENU_COMPLETE.  The matches are generated as if a `*' was added to the end of
              the word, or inserted at the cursor when COMPLETE_IN_WORD is  set.   This  actually
              uses  pattern  matching,  not  globbing, so it works not only for files but for any
              completion, such as options, user names, etc.

              Note that when  the  pattern  matcher  is  used,  matching  control  (for  example,
              case-insensitive  or  anchored  matching)  cannot  be  used.   This limitation only
              applies  when  the  current  word  contains  a  pattern;  simply  turning  on   the
              GLOB_COMPLETE option does not have this effect.

       HASH_LIST_ALL <D>
              Whenever  a  command  completion is attempted, make sure the entire command path is
              hashed first.  This makes the first completion slower.

       LIST_AMBIGUOUS <D>
              This option works when AUTO_LIST or BASH_AUTO_LIST is also set.   If  there  is  an
              unambiguous prefix to insert on the command line, that is done without a completion
              list being displayed; in other words, auto-listing behaviour only takes place  when
              nothing would be inserted.  In the case of BASH_AUTO_LIST, this means that the list
              will be delayed to the third call of the function.

       LIST_BEEP <D>
              Beep on an ambiguous completion.   More  accurately,  this  forces  the  completion
              widgets  to  return  status 1 on an ambiguous completion, which causes the shell to
              beep if the option BEEP is also set; this may be modified if completion  is  called
              from a user-defined widget.

       LIST_PACKED
              Try  to  make  the  completion  list smaller (occupying less lines) by printing the
              matches in columns with different widths.

       LIST_ROWS_FIRST
              Lay out the matches in completion lists sorted horizontally, that  is,  the  second
              match is to the right of the first one, not under it as usual.

       LIST_TYPES (-X) <D>
              When listing files that are possible completions, show the type of each file with a
              trailing identifying mark.

       MENU_COMPLETE (-Y)
              On an ambiguous completion, instead of listing possibilities or beeping, insert the
              first match immediately.  Then when completion is requested again, remove the first
              match and insert the second match, etc.  When there are no more matches, go back to
              the first one again.  reverse-menu-complete may be used to loop through the list in
              the other direction. This option overrides AUTO_MENU.

       REC_EXACT (-S)
              In completion, recognize exact matches even if they are ambiguous.

   Expansion and Globbing
       BAD_PATTERN (+2) <C> <Z>
              If a pattern for filename generation is badly formed, print an error message.   (If
              this option is unset, the pattern will be left unchanged.)

       BARE_GLOB_QUAL <Z>
              In  a  glob pattern, treat a trailing set of parentheses as a qualifier list, if it
              contains no `|', `(' or (if special) `~' characters.   See  the  section  `Filename
              Generation'.

       BRACE_CCL
              Expand expressions in braces which would not otherwise undergo brace expansion to a
              lexically ordered list of all the characters.  See the section `Brace Expansion'.

       CASE_GLOB <D>
              Make globbing (filename generation) sensitive to case.  Note  that  other  uses  of
              patterns are always sensitive to case.  If the option is unset, the presence of any
              character which is special  to  filename  generation  will  cause  case-insensitive
              matching.  For example, cvs(/) can match the directory CVS owing to the presence of
              the globbing flag (unless the option BARE_GLOB_QUAL is unset).

       CASE_MATCH <D>
              Make regular expressions using the zsh/regex module  (including  matches  with  =~)
              sensitive to case.

       CSH_NULL_GLOB <C>
              If  a  pattern  for filename generation has no matches, delete the pattern from the
              argument list; do not report an error unless all the patterns in a command have  no
              matches.  Overrides NOMATCH.

       EQUALS <Z>
              Perform = filename expansion.  (See the section `Filename Expansion'.)

       EXTENDED_GLOB
              Treat  the `#', `~' and `^' characters as part of patterns for filename generation,
              etc.  (An initial unquoted `~' always produces named directory expansion.)

       GLOB (+F, ksh: +f) <D>
              Perform filename generation (globbing).  (See the section `Filename Generation'.)

       GLOB_ASSIGN <C>
              If this option is set, filename generation (globbing) is  performed  on  the  right
              hand side of scalar parameter assignments of the form `name=pattern (e.g. `foo=*').
              If the result has more than one word the parameter will become an array with  those
              words  as  arguments.  This  option  is  provided for backwards compatibility only:
              globbing is always performed on the right hand side of  array  assignments  of  the
              form `name=(value)' (e.g. `foo=(*)') and this form is recommended for clarity; with
              this option set, it is not possible to predict whether the result will be an  array
              or a scalar.

       GLOB_DOTS (-4)
              Do not require a leading `.' in a filename to be matched explicitly.

       GLOB_SUBST <C> <K> <S>
              Treat  any characters resulting from parameter expansion as being eligible for file
              expansion and filename  generation,  and  any  characters  resulting  from  command
              substitution  as  being  eligible  for  filename generation.  Braces (and commas in
              between) do not become eligible for expansion.

       HIST_SUBST_PATTERN
              Substitutions using the :s and :& history  modifiers  are  performed  with  pattern
              matching  instead  of  string matching.  This occurs wherever history modifiers are
              valid, including glob qualifiers and parameters.   See  the  section  Modifiers  in
              zshexpn(1).

       IGNORE_BRACES (-I) <S>
              Do  not  perform  brace  expansion.   For historical reasons this also includes the
              effect of the IGNORE_CLOSE_BRACES option.

       IGNORE_CLOSE_BRACES
              When neither this option nor IGNORE_BRACES is set, a sole close brace character `}'
              is  syntactically  significant at any point on a command line.  This has the effect
              that no semicolon or newline is necessary before the brace terminating  a  function
              or  current  shell  construct.   When  either  option  is  set,  a closing brace is
              syntactically significant only in command  position.   Unlike  IGNORE_BRACES,  this
              option does not disable brace expansion.

              For  example,  with  both  options unset a function may be defined in the following
              fashion:

                     args() { echo $# }

              while if either option is set, this does not work and something equivalent  to  the
              following is required:

                     args() { echo $#; }

       KSH_GLOB <K>
              In  pattern  matching, the interpretation of parentheses is affected by a preceding
              `@', `*', `+', `?' or `!'.  See the section `Filename Generation'.

       MAGIC_EQUAL_SUBST
              All unquoted arguments  of  the  form  `anything=expression'  appearing  after  the
              command  name  have filename expansion (that is, where expression has a leading `~'
              or `=') performed on expression as if it were a parameter assignment.  The argument
              is  not  otherwise  treated  specially;  it  is  passed  to the command as a single
              argument, and not used as an actual parameter assignment.   For  example,  in  echo
              foo=~/bar:~/rod,  both  occurrences of ~ would be replaced.  Note that this happens
              anyway with typeset and similar statements.

              This option respects the setting of the KSH_TYPESET option.   In  other  words,  if
              both  options  are  in  effect, arguments looking like assignments will not undergo
              word splitting.

       MARK_DIRS (-8, ksh: -X)
              Append a trailing `/' to all directory names  resulting  from  filename  generation
              (globbing).

       MULTIBYTE <C> <K> <Z>
              Respect  multibyte  characters  when  found  in  strings.  When this option is set,
              strings are examined using the system library to determine how many  bytes  form  a
              character,  depending  on  the current locale.  This affects the way characters are
              counted in pattern matching, parameter values and various delimiters.

              The option is on by default if the shell was compiled with MULTIBYTE_SUPPORT except
              in  sh  emulation;  otherwise  it is off by default and has no effect if turned on.
              The mode is off in sh emulation for compatibility but for interactive use may  need
              to be turned on if the terminal interprets multibyte characters.

              If  the  option is off a single byte is always treated as a single character.  This
              setting is designed purely for examining strings known  to  contain  raw  bytes  or
              other values that may not be characters in the current locale.  It is not necessary
              to unset the option merely because the character set for the  current  locale  does
              not contain multibyte characters.

              The  option  does  not  affect the shell's editor,  which always uses the locale to
              determine multibyte characters.  This is because the character set displayed by the
              terminal emulator is independent of shell settings.

       NOMATCH (+3) <C> <Z>
              If  a  pattern  for  filename generation has no matches, print an error, instead of
              leaving it unchanged in the argument list.  This also applies to file expansion  of
              an initial `~' or `='.

       NULL_GLOB (-G)
              If  a  pattern  for filename generation has no matches, delete the pattern from the
              argument list instead of reporting an error.  Overrides NOMATCH.

       NUMERIC_GLOB_SORT
              If numeric filenames are  matched  by  a  filename  generation  pattern,  sort  the
              filenames numerically rather than lexicographically.

       RC_EXPAND_PARAM (-P)
              Array  expansions  of the form `foo${xx}bar', where the parameter xx is set to (a b
              c), are substituted with `fooabar foobbar foocbar' instead of the default  `fooa  b
              cbar'.  Note that an empty array will therefore cause all arguments to be removed.

       REMATCH_PCRE <Z>
              If  set,  regular expression matching with the =~ operator will use Perl-Compatible
              Regular Expressions from the PCRE library,  if  available.   If  not  set,  regular
              expressions will use the extended regexp syntax provided by the system libraries.

       SH_GLOB <K> <S>
              Disables  the  special  meaning of `(', `|', `)' and '<' for globbing the result of
              parameter and command substitutions, and in  some  other  places  where  the  shell
              accepts  patterns.   If  SH_GLOB  is  set but KSH_GLOB is not, the shell allows the
              interpretation of subshell expressions enclosed in parentheses in some cases  where
              there is no space before the opening parenthesis, e.g. !(true) is interpreted as if
              there were a space after the !.  This option is set by default if zsh is invoked as
              sh or ksh.

       UNSET (+u, ksh: +u) <K> <S> <Z>
              Treat unset parameters as if they were empty when substituting.  Otherwise they are
              treated as an error.

       WARN_CREATE_GLOBAL
              Print a warning message when a global parameter is created  in  a  function  by  an
              assignment.  This often indicates that a parameter has not been declared local when
              it should have been.  Parameters explicitly declared global from within a  function
              using  typeset  -g  do  not  cause a warning.  Note that there is no warning when a
              local parameter is assigned to in a nested function, which  may  also  indicate  an
              error.

   History
       APPEND_HISTORY <D>
              If  this  is  set, zsh sessions will append their history list to the history file,
              rather than replace it. Thus, multiple parallel zsh sessions will all have the  new
              entries  from their history lists added to the history file, in the order that they
              exit.  The file will still be periodically re-written to trim it when the number of
              lines   grows   20%   beyond  the  value  specified  by  $SAVEHIST  (see  also  the
              HIST_SAVE_BY_COPY option).

       BANG_HIST (+K) <C> <Z>
              Perform textual history expansion, csh-style, treating the character `!' specially.

       EXTENDED_HISTORY <C>
              Save each command's beginning timestamp  (in  seconds  since  the  epoch)  and  the
              duration (in seconds) to the history file.  The format of this prefixed data is:

              `: <beginning time>:<elapsed seconds>;<command>'.

       HIST_ALLOW_CLOBBER
              Add  `|'  to output redirections in the history.  This allows history references to
              clobber files even when CLOBBER is unset.

       HIST_BEEP <D>
              Beep when an attempt is made to access a history entry which isn't there.

       HIST_EXPIRE_DUPS_FIRST
              If the internal history needs to be  trimmed  to  add  the  current  command  line,
              setting  this option will cause the oldest history event that has a duplicate to be
              lost before losing a unique event from the list.  You should be  sure  to  set  the
              value  of  HISTSIZE to a larger number than SAVEHIST in order to give you some room
              for  the  duplicated  events,  otherwise  this  option  will   behave   just   like
              HIST_IGNORE_ALL_DUPS once the history fills up with unique events.

       HIST_FCNTL_LOCK
              When writing out the history file, by default zsh uses ad-hoc file locking to avoid
              known problems with locking on some operating systems.  With this option locking is
              done  by  means  of  the  system's  fcntl call, where this method is available.  On
              recent operating  systems  this  may  provide  better  performance,  in  particular
              avoiding history corruption when files are stored on NFS.

       HIST_FIND_NO_DUPS
              When searching for history entries in the line editor, do not display duplicates of
              a line previously found, even if the duplicates are not contiguous.

       HIST_IGNORE_ALL_DUPS
              If a new command line being added to the history list duplicates an older one,  the
              older command is removed from the list (even if it is not the previous event).

       HIST_IGNORE_DUPS (-h)
              Do  not  enter  command  lines  into the history list if they are duplicates of the
              previous event.

       HIST_IGNORE_SPACE (-g)
              Remove command lines from the history list when the first character on the line  is
              a space, or when one of the expanded aliases contains a leading space.  Only normal
              aliases (not global or suffix aliases) have this behaviour.  Note that the  command
              lingers  in  the  internal  history  until  the  next  command is entered before it
              vanishes, allowing you to briefly reuse or edit the line.  If you want to  make  it
              vanish right away without entering another command, type a space and press return.

       HIST_LEX_WORDS
              By  default,  shell  history  that is read in from files is split into words on all
              white space.  This means that arguments with quoted whitespace  are  not  correctly
              handled,  with  the consequence that references to words in history lines that have
              been read from a file may be inaccurate.  When this option is set,  words  read  in
              from  a  history  file  are divided up in a similar fashion to normal shell command
              line handling.  Although this produces more accurately delimited words, if the size
              of  the  history  file  is large this can be slow.  Trial and error is necessary to
              decide.

       HIST_NO_FUNCTIONS
              Remove function definitions from the history list.  Note that the function  lingers
              in  the  internal  history  until  the  next command is entered before it vanishes,
              allowing you to briefly reuse or edit the definition.

       HIST_NO_STORE
              Remove the history (fc -l) command from the history list when invoked.   Note  that
              the  command  lingers  in  the  internal  history until the next command is entered
              before it vanishes, allowing you to briefly reuse or edit the line.

       HIST_REDUCE_BLANKS
              Remove superfluous blanks from each command line being added to the history list.

       HIST_SAVE_BY_COPY <D>
              When the history file is re-written, we normally write out a copy of the file named
              $HISTFILE.new  and  then  rename  it  over the old one.  However, if this option is
              unset, we instead truncate the old history file  and  write  out  the  new  version
              in-place.  If one of the history-appending options is enabled, this option only has
              an effect when the enlarged history file needs to be re-written to trim it down  to
              size.   Disable  this only if you have special needs, as doing so makes it possible
              to lose history entries if zsh gets interrupted during the save.

              When writing out a  copy  of  the  history  file,  zsh  preserves  the  old  file's
              permissions  and  group  information, but will refuse to write out a new file if it
              would change the history file's owner.

       HIST_SAVE_NO_DUPS
              When writing out the history file, older commands that  duplicate  newer  ones  are
              omitted.

       HIST_VERIFY
              Whenever  the  user  enters  a  line with history expansion, don't execute the line
              directly; instead, perform history expansion and reload the line into  the  editing
              buffer.

       INC_APPEND_HISTORY
              This  options  works like APPEND_HISTORY except that new history lines are added to
              the $HISTFILE incrementally (as soon as they  are  entered),  rather  than  waiting
              until  the  shell exits.  The file will still be periodically re-written to trim it
              when the number of lines grows 20% beyond the value  specified  by  $SAVEHIST  (see
              also the HIST_SAVE_BY_COPY option).

       SHARE_HISTORY <K>

              This  option  both imports new commands from the history file, and also causes your
              typed commands to be appended to the history file (the latter  is  like  specifying
              INC_APPEND_HISTORY).   The  history  lines  are  also  output  with  timestamps ala
              EXTENDED_HISTORY (which makes it easier to find the spot where we left off  reading
              the file after it gets re-written).

              By default, history movement commands visit the imported lines as well as the local
              lines, but you can toggle this on and off with the set-local-history  zle  binding.
              It  is  also  possible  to  create a zle widget that will make some commands ignore
              imported commands, and some include them.

              If you find that you want more control over when commands  get  imported,  you  may
              wish  to  turn  SHARE_HISTORY  off, INC_APPEND_HISTORY on, and then manually import
              commands whenever you need them using `fc -RI'.

   Initialisation
       ALL_EXPORT (-a, ksh: -a)
              All parameters subsequently defined are automatically exported.

       GLOBAL_EXPORT (<Z>)
              If this option is set, passing the -x flag to the builtins declare, float, integer,
              readonly  and  typeset (but not local) will also set the -g flag;  hence parameters
              exported to the environment will not be  made  local  to  the  enclosing  function,
              unless  they  were  already  or  the flag +g is given explicitly.  If the option is
              unset, exported parameters will be made local in just the same  way  as  any  other
              parameter.

              This  option  is  set  by default for backward compatibility; it is not recommended
              that its behaviour be relied upon.  Note that the builtin export always  sets  both
              the -x and -g flags, and hence its effect extends beyond the scope of the enclosing
              function; this is the most portable way to achieve this behaviour.

       GLOBAL_RCS (-d) <D>
              If this option is unset, the startup files /etc/zprofile,  /etc/zshrc,  /etc/zlogin
              and  /etc/zlogout  will not be run.  It can be disabled and re-enabled at any time,
              including inside local startup files (.zshrc, etc.).

       RCS (+f) <D>
              After /etc/zshenv  is  sourced  on  startup,  source  the  .zshenv,  /etc/zprofile,
              .zprofile,  /etc/zshrc,  .zshrc,  /etc/zlogin,  .zlogin,  and  .zlogout  files,  as
              described in the section `Files'.  If this option is unset, the /etc/zshenv file is
              still  sourced,  but  any  of  the others will not be; it can be set at any time to
              prevent the remaining startup files after the currently executing  one  from  being
              sourced.

   Input/Output
       ALIASES <D>
              Expand aliases.

       CLOBBER (+C, ksh: +C) <D>
              Allows  `>'  redirection  to  truncate  existing  files,  and `>>' to create files.
              Otherwise `>!' or `>|' must be used to truncate a  file,  and  `>>!'  or  `>>|'  to
              create a file.

       CORRECT (-0)
              Try  to correct the spelling of commands.  Note that, when the HASH_LIST_ALL option
              is not set or when some directories in the path are not readable, this may  falsely
              report spelling errors the first time some commands are used.

              The  shell variable CORRECT_IGNORE may be set to a pattern to match words that will
              never be offered as corrections.

       CORRECT_ALL (-O)
              Try to correct the spelling of all arguments in a line.

       DVORAK Use the Dvorak keyboard instead of the standard qwerty  keyboard  as  a  basis  for
              examining  spelling  mistakes  for  the  CORRECT  and  CORRECT_ALL  options and the
              spell-word editor command.

       FLOW_CONTROL <D>
              If this option is unset, output flow control  via  start/stop  characters  (usually
              assigned to ^S/^Q) is disabled in the shell's editor.

       IGNORE_EOF (-7)
              Do  not  exit on end-of-file.  Require the use of exit or logout instead.  However,
              ten consecutive EOFs will cause the shell  to  exit  anyway,  to  avoid  the  shell
              hanging if its tty goes away.

              Also, if this option is set and the Zsh Line Editor is used, widgets implemented by
              shell functions can be bound to  EOF  (normally  Control-D)  without  printing  the
              normal  warning  message.   This  works only for normal widgets, not for completion
              widgets.

       INTERACTIVE_COMMENTS (-k) <K> <S>
              Allow comments even in interactive shells.

       HASH_CMDS <D>
              Note the location of each command  the  first  time  it  is  executed.   Subsequent
              invocations  of  the  same  command  will  use  the saved location, avoiding a path
              search.  If this option is unset, no path hashing is done at  all.   However,  when
              CORRECT is set, commands whose names do not appear in the functions or aliases hash
              tables are hashed in order to avoid reporting them as spelling errors.

       HASH_DIRS <D>
              Whenever a command name is hashed, hash the directory containing it, as well as all
              directories that occur earlier in the path.  Has no effect if neither HASH_CMDS nor
              CORRECT is set.

       HASH_EXECUTABLES_ONLY
              When hashing commands because of HASH_COMMANDS, check that the file to be hashed is
              actually  an executable.  This option is unset by default as if the path contains a
              large number of commands, or consists of many remote files,  the  additional  tests
              can  take  a  long  time.   Trial  and  error  is  needed to show if this option is
              beneficial.

       MAIL_WARNING (-U)
              Print a warning message if a mail file has  been  accessed  since  the  shell  last
              checked.

       PATH_DIRS (-Q)
              Perform  a  path  search  even  on  command  names  with  slashes in them.  Thus if
              `/usr/local/bin' is in the user's path,  and  he  or  she  types  `X11/xinit',  the
              command `/usr/local/bin/X11/xinit' will be executed (assuming it exists).  Commands
              explicitly beginning with `/', `./' or `../' are not subject to  the  path  search.
              This also applies to the `.' builtin.

              Note  that  subdirectories  of  the  current  directory  are  always  searched  for
              executables specified in this form.  This takes place before any  search  indicated
              by  this  option,  and regardless of whether `.' or the current directory appear in
              the command search path.

       PATH_SCRIPT <K> <S>
              If this option is not set, a script passed as the first non-option argument to  the
              shell  must  contain  the name of the file to open.  If this option is set, and the
              script does not specify a directory path, the script is looked  for  first  in  the
              current directory, then in the command path.  See the section INVOCATION in zsh(1).

       PRINT_EIGHT_BIT
              Print  eight bit characters literally in completion lists, etc.  This option is not
              necessary if your system correctly returns the printability of eight bit characters
              (see ctype(3)).

       PRINT_EXIT_VALUE (-1)
              Print the exit value of programs with non-zero exit status.

       RC_QUOTES
              Allow  the  character  sequence `''' to signify a single quote within singly quoted
              strings.  Note this does not apply in quoted strings using the format $'...', where
              a backslashed single quote can be used.

       RM_STAR_SILENT (-H) <K> <S>
              Do not query the user before executing `rm *' or `rm path/*'.

       RM_STAR_WAIT
              If querying the user before executing `rm *' or `rm path/*', first wait ten seconds
              and ignore anything typed in that time.  This avoids  the  problem  of  reflexively
              answering  `yes'  to  the query when one didn't really mean it.  The wait and query
              can always be avoided by expanding the `*' in ZLE (with tab).

       SHORT_LOOPS <C> <Z>
              Allow the short forms of for, repeat, select, if, and function constructs.

       SUN_KEYBOARD_HACK (-L)
              If a line ends with a backquote, and there are an odd number of backquotes  on  the
              line,  ignore  the  trailing backquote.  This is useful on some keyboards where the
              return key is too small, and the backquote key lies annoyingly close to it.  As  an
              alternative the variable KEYBOARD_HACK lets you choose the character to be removed.

   Job Control
       AUTO_CONTINUE
              With  this  option  set,  stopped jobs that are removed from the job table with the
              disown builtin command are automatically sent a CONT signal to make them running.

       AUTO_RESUME (-W)
              Treat single word simple commands without redirection as candidates for  resumption
              of an existing job.

       BG_NICE (-6) <C> <Z>
              Run all background jobs at a lower priority.  This option is set by default.

       CHECK_JOBS <Z>
              Report  the status of background and suspended jobs before exiting a shell with job
              control; a second attempt to exit the shell will succeed.   NO_CHECK_JOBS  is  best
              used only in combination with NO_HUP, else such jobs will be killed automatically.

              The  check is omitted if the commands run from the previous command line included a
              `jobs' command, since it is assumed the user is aware that there are background  or
              suspended jobs.  A `jobs' command run from one of the hook functions defined in the
              section SPECIAL FUNCTIONS in zshmisc(1) is not counted for this purpose.

       HUP <Z>
              Send the HUP signal to running jobs when the shell exits.

       LONG_LIST_JOBS (-R)
              List jobs in the long format by default.

       MONITOR (-m, ksh: -m)
              Allow job control.  Set by default in interactive shells.

       NOTIFY (-5, ksh: -b) <Z>
              Report the status of background jobs immediately, rather than  waiting  until  just
              before printing a prompt.

       POSIX_JOBS <K> <S>
              This option makes job control more compliant with the POSIX standard.

              When  the  option is not set, the MONITOR option is unset on entry to subshells, so
              that job control is no longer active.  When the option is set, the  MONITOR  option
              and  job  control  remain active in the subshell, but note that the subshell has no
              access to jobs in the parent shell.

              When the option is not set, jobs put in the background or foreground with bg or  fg
              are  displayed  with the same information that would be reported by jobs.  When the
              option is set, only the text is printed.   The  output  from  jobs  itself  is  not
              affected by the option.

              When  the  option  is  not  set, job information from the parent shell is saved for
              output within a subshell (for example, within a pipeline).  When the option is set,
              the output of jobs is empty until a job is started within the subshell.

              When the option is set, it becomes possible to use the wait builtin to wait for the
              last job started in the background (as given by $!) even if that  job  has  already
              exited.   This  works even if the option is turned on temporarily around the use of
              the wait builtin.

   Prompting
       PROMPT_BANG <K>
              If set, `!' is treated specially in prompt  expansion.   See  EXPANSION  OF  PROMPT
              SEQUENCES in zshmisc(1).

       PROMPT_CR (+V) <D>
              Print  a carriage return just before printing a prompt in the line editor.  This is
              on by default as multi-line editing is only possible if the editor knows where  the
              start of the line appears.

       PROMPT_SP <D>
              Attempt  to  preserve  a partial line (i.e. a line that did not end with a newline)
              that would otherwise be covered up by the  command  prompt  due  to  the  PROMPT_CR
              option.   This  works  by  outputting  some  cursor-control characters, including a
              series of spaces, that should make the terminal  wrap  to  the  next  line  when  a
              partial  line  is  present  (note that this is only successful if your terminal has
              automatic margins, which is typical).

              When a partial line is preserved, by default you will see an inverse+bold character
              at  the  end  of  the partial line:  a "%" for a normal user or a "#" for root.  If
              set, the shell parameter PROMPT_EOL_MARK can be used to customize how  the  end  of
              partial lines are shown.

              NOTE: if the PROMPT_CR option is not set, enabling this option will have no effect.
              This option is on by default.

       PROMPT_PERCENT <C> <Z>
              If set, `%' is treated specially in prompt  expansion.   See  EXPANSION  OF  PROMPT
              SEQUENCES in zshmisc(1).

       PROMPT_SUBST <K> <S>
              If  set,  parameter  expansion,  command  substitution and arithmetic expansion are
              performed in prompts.  Substitutions within  prompts  do  not  affect  the  command
              status.

       TRANSIENT_RPROMPT
              Remove  any  right  prompt from display when accepting a command line.  This may be
              useful with terminals with other cut/paste methods.

   Scripts and Functions
       C_BASES
              Output hexadecimal numbers in the standard C format, for example `0xFF' instead  of
              the  usual `16#FF'.  If the option OCTAL_ZEROES is also set (it is not by default),
              octal numbers will be treated similarly  and  hence  appear  as  `077'  instead  of
              `8#77'.   This  option  has  no effect on the choice of the output base, nor on the
              output of bases other than hexadecimal and octal.  Note that these formats will  be
              understood on input irrespective of the setting of C_BASES.

       C_PRECEDENCES
              This  alters  the  precedence  of  arithmetic operators to be more like C and other
              programming languages; the section  ARITHMETIC  EVALUATION  in  zshmisc(1)  has  an
              explicit list.

       DEBUG_BEFORE_CMD
              Run  the  DEBUG  trap  before each command; otherwise it is run after each command.
              Setting this option mimics the behaviour of ksh  93;  with  the  option  unset  the
              behaviour is that of ksh 88.

       ERR_EXIT (-e, ksh: -e)
              If  a  command has a non-zero exit status, execute the ZERR trap, if set, and exit.
              This is disabled while running initialization scripts.

              The behaviour is also disabled inside DEBUG traps.  In  this  case  the  option  is
              handled   specially:   it   is   unset  on  entry  to  the  trap.   If  the  option
              DEBUG_BEFORE_CMD is set, as it is by default, and the option ERR_EXIT is  found  to
              have  been set on exit, then the command for which the DEBUG trap is being executed
              is skipped.  The option is restored after the trap exits.

       ERR_RETURN
              If a command has a non-zero exit status,  return  immediately  from  the  enclosing
              function.   The  logic  is  identical to that for ERR_EXIT, except that an implicit
              return statement is executed instead of an exit.  This will trigger an exit at  the
              outermost level of a non-interactive script.

       EVAL_LINENO <Z>
              If  set,  line  numbers of expressions evaluated using the builtin eval are tracked
              separately of the enclosing environment.  This applies both to the parameter LINENO
              and  the  line  number  output  by the prompt escape %i.  If the option is set, the
              prompt escape %N will output the string `(eval)' instead of the script or  function
              name  as  an  indication.    (The  two  prompt  escapes  are  typically used in the
              parameter PS4 to be output when the option  XTRACE  is  set.)   If  EVAL_LINENO  is
              unset, the line number of the surrounding script or function is retained during the
              evaluation.

       EXEC (+n, ksh: +n) <D>
              Do execute commands.  Without this option, commands are read and checked for syntax
              errors,  but  not  executed.   This  option  cannot be turned off in an interactive
              shell, except when `-n' is supplied to the shell at startup.

       FUNCTION_ARGZERO <C> <Z>
              When executing a shell function or sourcing a script, set  $0  temporarily  to  the
              name of the function/script.

       LOCAL_OPTIONS <K>
              If  this  option  is set at the point of return from a shell function, most options
              (including this one) which were in force upon entry to the function  are  restored;
              options  that are not restored are PRIVILEGED and RESTRICTED.  Otherwise, only this
              option and the XTRACE and PRINT_EXIT_VALUE options are restored.  Hence if this  is
              explicitly  unset  by  a  shell function the other options in force at the point of
              return will remain so.  A shell function can also guarantee itself  a  known  shell
              configuration   with  a  formulation  like  `emulate  -L  zsh';  the  -L  activates
              LOCAL_OPTIONS.

       LOCAL_TRAPS <K>
              If this option is set when a signal  trap  is  set  inside  a  function,  then  the
              previous  status  of  the  trap  for that signal will be restored when the function
              exits.  Note that this option must be set prior to altering the trap behaviour in a
              function;  unlike LOCAL_OPTIONS, the value on exit from the function is irrelevant.
              However, it does not need to be set before any global trap for that to be correctly
              restored by a function.  For example,

                     unsetopt localtraps
                     trap - INT
                     fn() { setopt localtraps; trap '' INT; sleep 3; }

              will restore normal handling of SIGINT after the function exits.

       MULTI_FUNC_DEF <Z>
              Allow  definitions of multiple functions at once in the form `fn1 fn2...()'; if the
              option is not set, this causes a parse error.   Definition  of  multiple  functions
              with the function keyword is always allowed.  Multiple function definitions are not
              often used and can cause obscure errors.

       MULTIOS <Z>
              Perform implicit tees or cats when multiple redirections  are  attempted  (see  the
              section `Redirection').

       OCTAL_ZEROES <S>
              Interpret  any  integer  constant  beginning  with  a  0  as  octal,  per  IEEE Std
              1003.2-1992 (ISO 9945-2:1993).  This  is  not  enabled  by  default  as  it  causes
              problems with parsing of, for example, date and time strings with leading zeroes.

              Sequences of digits indicating a numeric base such as the `08' component in `08#77'
              are always interpreted as decimal, regardless of leading zeroes.

       SOURCE_TRACE
              If set, zsh will print an informational message announcing the name of each file it
              loads.  The format of the output is similar to that for the XTRACE option, with the
              message <sourcetrace>.  A file may be loaded by the shell itself when it starts  up
              and  shuts  down  (Startup/Shutdown  Files) or by the use of the `source' and `dot'
              builtin commands.

       TYPESET_SILENT
              If this is unset, executing any of the `typeset' family of commands with no options
              and  a list of parameters that have no values to be assigned but already exist will
              display the value of the parameter.  If the option is set, they will only be  shown
              when  parameters  are  selected with the `-m' option.  The option `-p' is available
              whether or not the option is set.

       VERBOSE (-v, ksh: -v)
              Print shell input lines as they are read.

       XTRACE (-x, ksh: -x)
              Print commands and their arguments as they are executed.  The output is proceded by
              the  value  of  $PS4,  formatted  as  described  in the section EXPANSION OF PROMPT
              SEQUENCES in zshmisc(1).

   Shell Emulation
       BASH_REMATCH
              When set, matches performed with the =~ operator will set  the  BASH_REMATCH  array
              variable,  instead  of the default MATCH and match variables.  The first element of
              the BASH_REMATCH array will contain the entire matched text and subsequent elements
              will contain extracted substrings.  This option makes more sense when KSH_ARRAYS is
              also set, so that the entire matched portion is stored at index  0  and  the  first
              substring  is  at  index  1.   Without this option, the MATCH variable contains the
              entire matched text and the match array variable contains substrings.

       BSD_ECHO <S>
              Make the echo builtin compatible with  the  BSD  echo(1)  command.   This  disables
              backslashed escape sequences in echo strings unless the -e option is specified.

       CSH_JUNKIE_HISTORY <C>
              A  history  reference  without an event specifier will always refer to the previous
              command.  Without this option, such a history reference refers to the same event as
              the previous history reference, defaulting to the previous command.

       CSH_JUNKIE_LOOPS <C>
              Allow loop bodies to take the form `list; end' instead of `do list; done'.

       CSH_JUNKIE_QUOTES <C>
              Changes  the  rules for single- and double-quoted text to match that of csh.  These
              require that embedded newlines be preceded by a backslash; unescaped newlines  will
              cause  an error message.  In double-quoted strings, it is made impossible to escape
              `$', ``' or `"' (and `\' itself no longer needs escaping).   Command  substitutions
              are only expanded once, and cannot be nested.

       CSH_NULLCMD <C>
              Do  not use the values of NULLCMD and READNULLCMD when running redirections with no
              command.  This make such redirections fail (see the section `Redirection').

       KSH_ARRAYS <K> <S>
              Emulate ksh array handling as closely as possible.  If this option  is  set,  array
              elements are numbered from zero, an array parameter without subscript refers to the
              first element instead of the whole array, and braces  are  required  to  delimit  a
              subscript (`${path[2]}' rather than just `$path[2]').

       KSH_AUTOLOAD <K> <S>
              Emulate  ksh  function autoloading.  This means that when a function is autoloaded,
              the corresponding file is merely executed, and must  define  the  function  itself.
              (By  default,  the  function  is defined to the contents of the file.  However, the
              most common ksh-style case - of the file containing only a simple definition of the
              function - is always handled in the ksh-compatible manner.)

       KSH_OPTION_PRINT <K>
              Alters  the  way options settings are printed: instead of separate lists of set and
              unset options, all options are shown, marked `on' if they are  in  the  non-default
              state, `off' otherwise.

       KSH_TYPESET <K>
              Alters  the  way  arguments  to  the typeset family of commands, including declare,
              export, float, integer, local and readonly, are processed.   Without  this  option,
              zsh  will  perform  normal  word splitting after command and parameter expansion in
              arguments of an assignment; with it, word splitting does not take  place  in  those
              cases.

       KSH_ZERO_SUBSCRIPT
              Treat  use  of  a  subscript  of  value  zero  in  array or string expressions as a
              reference to the first element, i.e. the element that usually has the subscript  1.
              Ignored if KSH_ARRAYS is also set.

              If neither this option nor KSH_ARRAYS is set, accesses to an element of an array or
              string with subscript zero return an empty element or string, while attempts to set
              element  zero  of an array or string are treated as an error.  However, attempts to
              set an otherwise valid subscript  range  that  includes  zero  will  succeed.   For
              example, if KSH_ZERO_SUBSCRIPT is not set,

                     array[0]=(element)

              is an error, while

                     array[0,1]=(element)

              is not and will replace the first element of the array.

              This  option  is  for  compatibility  with  older  versions of the shell and is not
              recommended in new code.

       POSIX_ALIASES <K> <S>
              When this option is set, reserved words are not candidates for alias expansion:  it
              is  still  possible to declare any of them as an alias, but the alias will never be
              expanded.   Reserved  words  are  described  in  the  section  RESERVED  WORDS   in
              zshmisc(1).

              Alias expansion takes place while text is being read; hence when this option is set
              it does not take effect until the end of any function or other piece of shell  code
              parsed  as  one  unit.  Note this may cause differences from other shells even when
              the option is in effect.  For example, when running a command  with  `zsh  -c',  or
              even  `zsh  -o posixaliases -c', the entire command argument is parsed as one unit,
              so aliases defined within the argument are not available even in later  lines.   If
              in doubt, avoid use of aliases in non-interactive code.

       POSIX_BUILTINS <K> <S>
              When  this  option  is set the command builtin can be used to execute shell builtin
              commands.  Parameter assignments  specified  before  shell  functions  and  special
              builtins  are  kept  after  the  command  completes  unless  the special builtin is
              prefixed with the command builtin.  Special builtins are  .,  :,  break,  continue,
              declare,  eval, exit, export, integer, local, readonly, return, set, shift, source,
              times, trap and unset.

              In addition, various error conditions associated with the above  builtins  or  exec
              cause  a  non-interactive  shell  to exit and an interactive shell to return to its
              top-level processing.

       POSIX_IDENTIFIERS <K> <S>
              When this option is set, only the ASCII characters a to z, A to Z, 0 to 9 and _ may
              be used in identifiers (names of shell parameters and modules).

              When  the  option  is  unset and multibyte character support is enabled (i.e. it is
              compiled in and the option MULTIBYTE is set), then  additionally  any  alphanumeric
              characters  in  the  local  character  set  may  be used in identifiers.  Note that
              scripts and functions written with this feature are not  portable,  and  also  that
              both  options  must  be  set  before the script or function is parsed; setting them
              during execution is not sufficient as the syntax variable=value  has  already  been
              parsed as a command rather than an assignment.

              If  multibyte  character  support  is  not  compiled  into the shell this option is
              ignored; all octets with the top bit set may  be  used  in  identifiers.   This  is
              non-standard but is the traditional zsh behaviour.

       POSIX_STRINGS <K> <S>
              This  option  affects  processing of quoted strings.  Currently it only affects the
              behaviour of null characters, i.e.  character  0  in  the  portable  character  set
              corresponding to US ASCII.

              When  this  option  is not set, null characters embedded within strings of the form
              $'...' are treated as ordinary characters. The entire string is  maintained  within
              the  shell  and  output to files where necessary, although owing to restrictions of
              the library interface the string is truncated at the null character in file  names,
              environment variables, or in arguments to external programs.

              When  this option is set, the $'...' expression is truncated at the null character.
              Note that remaining parts of the same string beyond the termination of  the  quotes
              are not trunctated.

              For  example, the command line argument a$'b\0c'd is treated with the option off as
              the characters a, b, null, c, d, and with the option on as the characters a, b, d.

       POSIX_TRAPS <K> <S>
              When the is option is set, the usual zsh behaviour of executing traps for  EXIT  on
              exit  from  shell  functions  is suppressed.  In that case, manipulating EXIT traps
              always alters the global trap for exiting the  shell;  the  LOCAL_TRAPS  option  is
              ignored for the EXIT trap.

       SH_FILE_EXPANSION <K> <S>
              Perform  filename expansion (e.g., ~ expansion) before parameter expansion, command
              substitution, arithmetic expansion and brace expansion.  If this option  is  unset,
              it   is   performed   after  brace  expansion,  so  things  like  `~$USERNAME'  and
              `~{pfalstad,rc}' will work.

       SH_NULLCMD <K> <S>
              Do not use the values of NULLCMD and READNULLCMD when doing redirections,  use  `:'
              instead (see the section `Redirection').

       SH_OPTION_LETTERS <K> <S>
              If this option is set the shell tries to interpret single letter options (which are
              used with set and setopt) like ksh does.  This also affects  the  value  of  the  -
              special parameter.

       SH_WORD_SPLIT (-y) <K> <S>
              Causes field splitting to be performed on unquoted parameter expansions.  Note that
              this option has nothing to do with word splitting.   (See  the  section  `Parameter
              Expansion'.)

       TRAPS_ASYNC
              While  waiting  for  a  program  to exit, handle signals and run traps immediately.
              Otherwise the trap is run after a child process has exited.   Note  this  does  not
              affect  the  point at which traps are run for any case other than when the shell is
              waiting for a child process.

   Shell State
       INTERACTIVE (-i, ksh: -i)
              This is an interactive shell.  This  option  is  set  upon  initialisation  if  the
              standard  input is a tty and commands are being read from standard input.  (See the
              discussion of SHIN_STDIN.)  This heuristic may be overridden by specifying a  state
              for  this option on the command line.  The value of this option can only be changed
              via flags supplied at invocation of the shell.  It cannot be changed  once  zsh  is
              running.

       LOGIN (-l, ksh: -l)
              This  is  a login shell.  If this option is not explicitly set, the shell becomes a
              login shell if the first character of the argv[0] passed to the shell is a `-'.

       PRIVILEGED (-p, ksh: -p)
              Turn on privileged mode. This is enabled automatically on startup if the  effective
              user  (group) ID is not equal to the real user (group) ID.  Turning this option off
              causes the effective user and group IDs to be set to the real user and  group  IDs.
              This  option  disables  sourcing  user startup files.  If zsh is invoked as `sh' or
              `ksh' with this option set, /etc/suid_profile is  sourced  (after  /etc/profile  on
              interactive  shells).  Sourcing  ~/.profile is disabled and the contents of the ENV
              variable is ignored. This option cannot be changed using the -m  option  of  setopt
              and  unsetopt,  and  changing  it  inside  a  function  always  changes it globally
              regardless of the LOCAL_OPTIONS option.

       RESTRICTED (-r)
              Enables restricted mode.  This option cannot be changed using unsetopt, and setting
              it  inside  a  function  always changes it globally regardless of the LOCAL_OPTIONS
              option.  See the section `Restricted Shell'.

       SHIN_STDIN (-s, ksh: -s)
              Commands are being read from the standard input.  Commands are read  from  standard
              input  if no command is specified with -c and no file of commands is specified.  If
              SHIN_STDIN is set explicitly on the command line, any argument that would otherwise
              have  been  taken  as  a file to run will instead be treated as a normal positional
              parameter.  Note that setting or unsetting this option on the command line does not
              necessarily affect the state the option will have while the shell is running - that
              is purely an indicator of whether on not commands  are  actually  being  read  from
              standard input.  The value of this option can only be changed via flags supplied at
              invocation of the shell.  It cannot be changed once zsh is running.

       SINGLE_COMMAND (-t, ksh: -t)
              If the shell is reading from standard input, it exits after a  single  command  has
              been  executed.   This also makes the shell non-interactive, unless the INTERACTIVE
              option is explicitly set on the command line.  The value of this option can only be
              changed  via  flags supplied at invocation of the shell.  It cannot be changed once
              zsh is running.

   Zle
       BEEP (+B) <D>
              Beep on error in ZLE.

       COMBINING_CHARS
              Assume that the terminal displays combining characters correctly.  Specifically, if
              a  base  alphanumeric  character  is followed by one or more zero-width punctuation
              characters,  assume  that  the  zero-width  characters   will   be   displayed   as
              modifications  to  the  base  character  within  the same width.  Not all terminals
              handle this.  If this option  is  not  set,  zero-width  characters  are  displayed
              separately with special mark-up.

              If this option is set, the pattern test [[:WORD:]] matches a zero-width punctuation
              character on the assumption that it will be used as part of a word  in  combination
              with  a  word  character.   Otherwise  the  base  shell  does  not handle combining
              characters specially.

       EMACS  If ZLE is loaded, turning on this option has the equivalent effect of `bindkey -e'.
              In  addition,  the  VI  option is unset.  Turning it off has no effect.  The option
              setting is not guaranteed to reflect the current keymap.  This option  is  provided
              for compatibility; bindkey is the recommended interface.

       OVERSTRIKE
              Start up the line editor in overstrike mode.

       SINGLE_LINE_ZLE (-M) <K>
              Use single-line command line editing instead of multi-line.

              Note  that  although  this  is  on  by  default  in  ksh emulation it only provides
              superficial compatibility with the ksh line editor and reduces the effectiveness of
              the  zsh  line editor.  As it has no effect on shell syntax, many users may wish to
              disable this option when using ksh emulation interactively.

       VI     If ZLE is loaded, turning on this option has the equivalent effect of `bindkey -v'.
              In  addition, the EMACS option is unset.  Turning it off has no effect.  The option
              setting is not guaranteed to reflect the current keymap.  This option  is  provided
              for compatibility; bindkey is the recommended interface.

       ZLE (-Z)
              Use  the  zsh  line  editor.   Set  by default in interactive shells connected to a
              terminal.

OPTION ALIASES

       Some options have alternative names.  These aliases are never used for output, but can  be
       used just like normal option names when specifying options to the shell.

       BRACE_EXPAND
              NO_IGNORE_BRACES (ksh and bash compatibility)

       DOT_GLOB
              GLOB_DOTS (bash compatibility)

       HASH_ALL
              HASH_CMDS (bash compatibility)

       HIST_APPEND
              APPEND_HISTORY (bash compatibility)

       HIST_EXPAND
              BANG_HIST (bash compatibility)

       LOG    NO_HIST_NO_FUNCTIONS (ksh compatibility)

       MAIL_WARN
              MAIL_WARNING (bash compatibility)

       ONE_CMD
              SINGLE_COMMAND (bash compatibility)

       PHYSICAL
              CHASE_LINKS (ksh and bash compatibility)

       PROMPT_VARS
              PROMPT_SUBST (bash compatibility)

       STDIN  SHIN_STDIN (ksh compatibility)

       TRACK_ALL
              HASH_CMDS (ksh compatibility)

SINGLE LETTER OPTIONS

   Default set
       -0     CORRECT
       -1     PRINT_EXIT_VALUE
       -2     NO_BAD_PATTERN
       -3     NO_NOMATCH
       -4     GLOB_DOTS
       -5     NOTIFY
       -6     BG_NICE
       -7     IGNORE_EOF
       -8     MARK_DIRS
       -9     AUTO_LIST
       -B     NO_BEEP
       -C     NO_CLOBBER
       -D     PUSHD_TO_HOME
       -E     PUSHD_SILENT
       -F     NO_GLOB
       -G     NULL_GLOB
       -H     RM_STAR_SILENT
       -I     IGNORE_BRACES
       -J     AUTO_CD
       -K     NO_BANG_HIST
       -L     SUN_KEYBOARD_HACK
       -M     SINGLE_LINE_ZLE
       -N     AUTO_PUSHD
       -O     CORRECT_ALL
       -P     RC_EXPAND_PARAM
       -Q     PATH_DIRS
       -R     LONG_LIST_JOBS
       -S     REC_EXACT
       -T     CDABLE_VARS
       -U     MAIL_WARNING
       -V     NO_PROMPT_CR
       -W     AUTO_RESUME
       -X     LIST_TYPES
       -Y     MENU_COMPLETE
       -Z     ZLE
       -a     ALL_EXPORT
       -e     ERR_EXIT
       -f     NO_RCS
       -g     HIST_IGNORE_SPACE
       -h     HIST_IGNORE_DUPS
       -i     INTERACTIVE
       -k     INTERACTIVE_COMMENTS
       -l     LOGIN
       -m     MONITOR
       -n     NO_EXEC
       -p     PRIVILEGED
       -r     RESTRICTED
       -s     SHIN_STDIN
       -t     SINGLE_COMMAND
       -u     NO_UNSET
       -v     VERBOSE
       -w     CHASE_LINKS
       -x     XTRACE
       -y     SH_WORD_SPLIT

   sh/ksh emulation set
       -C     NO_CLOBBER
       -T     TRAPS_ASYNC
       -X     MARK_DIRS
       -a     ALL_EXPORT
       -b     NOTIFY
       -e     ERR_EXIT
       -f     NO_GLOB
       -i     INTERACTIVE
       -l     LOGIN
       -m     MONITOR
       -n     NO_EXEC
       -p     PRIVILEGED
       -r     RESTRICTED
       -s     SHIN_STDIN
       -t     SINGLE_COMMAND
       -u     NO_UNSET
       -v     VERBOSE
       -x     XTRACE

   Also note
       -A     Used by set for setting arrays
       -b     Used on the command line to specify end of option processing
       -c     Used on the command line to specify a single command
       -m     Used by setopt for pattern-matching option setting
       -o     Used in all places to allow use of long option names
       -s     Used by set to sort positional parameters