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ZSHOPTIONS(1)							 ZSHOPTIONS(1)

NAME
       zshoptions - zsh options

SPECIFYING OPTIONS
       Options are primarily referred to by name.  These names are case insen‐
       sitive and underscores are ignored.  For example, `allexport' is equiv‐
       alent 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'.  Sim‐
       ilarly, `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 emula‐
       tions 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  com‐
	      mand, 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  seg‐
	      ment 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 direc‐
	      tory.  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  interac‐
	      tive  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 direc‐
	      tory 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	 func‐
	      tions try to return to the last prompt if given no numeric argu‐
	      ment.

       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 per‐
	      formed.

       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 `~'.	 (Oth‐
	      erwise, 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 charac‐
	      ter 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	amper‐
	      sand), 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 sub‐
	      stituted 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  con‐
	      tains 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  com‐
	      pletion,	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  comple‐
	      tion  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 ambigu‐
	      ous.

   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 charac‐
	      ters.  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 spe‐
	      cial  to	filename generation will cause case-insensitive match‐
	      ing.  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 Expan‐
	      sion'.)

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

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

       GLOB_ASSIGN <C>
	      If this option is set, filename generation  (globbing)  is  per‐
	      formed 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  com‐
	      patibility  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 explic‐
	      itly.

       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  per‐
	      formed  with  pattern matching instead of string matching.  This
	      occurs wherever history  modifiers  are  valid,  including  glob
	      qualifiers  and  parameters.   See the section Modifiers in zsh‐
	      expn(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 new‐
	      line 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 expan‐
	      sion.

	      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 sec‐
	      tion `Filename Generation'.

       MAGIC_EQUAL_SUBST
	      All unquoted arguments of the form `anything=expression' appear‐
	      ing  after  the  command	name have filename expansion (that is,
	      where expression has a leading `~' or `=') performed on  expres‐
	      sion  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 cur‐
	      rent 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 cur‐
	      rent 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 pat‐
	      tern, sort the filenames numerically rather  than	 lexicographi‐
	      cally.

       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 glob‐
	      bing 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  parame‐
	      ter  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	 func‐
	      tion, 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	paral‐
	      lel  zsh	sessions will all have the new entries from their his‐
	      tory 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 char‐
	      acter `!' 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 his‐
	      tory 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	 oper‐
	      ating 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 par‐
	      ticular 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	 char‐
	      acter  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 conse‐
	      quence 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 nec‐
	      essary to decide.

       HIST_NO_FUNCTIONS
	      Remove function definitions from the history  list.   Note  that
	      the function lingers in the internal history until the next com‐
	      mand is entered before it vanishes, allowing you to briefly  re‐
	      use 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  his‐
	      tory 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 $SAVE‐
	      HIST (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_HIS‐
	      TORY (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 when‐
	      ever 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 func‐
	      tion; this is the most portable way to achieve this behaviour.

       GLOBAL_RCS (-d) <D>
	      If this option is unset, the  startup  files  /etc/zsh/zprofile,
	      /etc/zsh/zshrc, /etc/zsh/zlogin and /etc/zsh/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/zsh/zshenv is sourced on startup, source the .zshenv,
	      /etc/zsh/zprofile,    .zprofile,	   /etc/zsh/zshrc,     .zshrc,
	      /etc/zsh/zlogin,	.zlogin,  and  .zlogout files, as described in
	      the  section  `Files'.	If   this   option   is	  unset,   the
	      /etc/zsh/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 (nor‐
	      mally 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, com‐
	      mands 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 com‐
	      mands, 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 sin‐
	      gle 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  alterna‐
	      tive 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	candi‐
	      dates 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	 exit‐
	      ing 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 com‐
	      mand 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	 fore‐
	      ground  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  com‐
	      mand  prompt  due	 to  the PROMPT_CR option.  This works by out‐
	      putting 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 parame‐
	      ter PROMPT_EOL_MARK can be used to customize how the end of par‐
	      tial 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  exe‐
	      cuted 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 evalua‐
	      tion.

       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  sup‐
	      plied 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	 func‐
	      tion, 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 func‐
	      tion, 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, regard‐
	      less 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 com‐
	      mands with no options and a list of parameters that have no val‐
	      ues  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  ref‐
	      erence, 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  sub‐
	      script (`${path[2]}' rather than just `$path[2]').

       KSH_AUTOLOAD <K> <S>
	      Emulate  ksh function autoloading.  This means that when a func‐
	      tion 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  com‐
	      mon  ksh-style case - of the file containing only a simple defi‐
	      nition 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	 argu‐
	      ments  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 ele‐
	      ment 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  exe‐
	      cute  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,  con‐
	      tinue,  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	tradi‐
	      tional 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	exter‐
	      nal 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 initiali‐
	      sation  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 effec‐
	      tive  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_pro‐
	      file 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 sec‐
	      tion `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  explic‐
	      itly 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  can‐
	      not 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 can‐
	      not be changed once zsh is running.

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

       COMBINING_CHARS
	      Assume that the  terminal	 displays  combining  characters  cor‐
	      rectly.	Specifically, if a base alphanumeric character is fol‐
	      lowed by one or more zero-width punctuation  characters,	assume
	      that  the	 zero-width  characters will be displayed as modifica‐
	      tions to the base character within the same width.  Not all ter‐
	      minals handle this.  If this option is not set, zero-width char‐
	      acters 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 guaran‐
	      teed 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 guaran‐
	      teed 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

zsh 4.3.17		       February 22, 2011		 ZSHOPTIONS(1)
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