disable [ -afmprs ] name ...
       Temporarily  disable  the named hash table elements or patterns.
       The default is to disable builtin commands.  This allows you  to
       use an external command with the same name as a builtin command.
       The -a option  causes  disable  to  act  on  regular  or  global
       aliases.  The -s option causes disable to act on suffix aliases.
       The -f option causes disable to act on shell functions.  The  -r
       options  causes disable to act on reserved words.  Without argu-
       ments all disabled hash table elements  from  the  corresponding
       hash  table  are  printed.   With  the -m flag the arguments are
       taken as patterns (which should be quoted to prevent  them  from
       undergoing filename expansion), and all hash table elements from
       the corresponding hash table matching these  patterns  are  dis-
       abled.  Disabled objects can be enabled with the enable command.

       With  the  option  -p, name ... refer to elements of the shell's
       pattern syntax as described in  the  section  `Filename  Genera-
       tion'.   Certain  elements  can be disabled separately, as given
       below.

       Note that patterns not allowed by the current settings  for  the
       options  EXTENDED_GLOB,  KSH_GLOB and SH_GLOB are never enabled,
       regardless of the setting here.  For example,  if  EXTENDED_GLOB
       is  not active, the pattern ^ is ineffective even if `disable -p
       "^"' has not been issued.  The list below indicates  any  option
       settings  that  restrict  the  use of the pattern.  It should be
       noted that setting SH_GLOB has a wider effect than  merely  dis-
       abling  patterns  as  certain  expressions,  in particular those
       involving parentheses, are parsed differently.

       The following patterns may be disabled;  all  the  strings  need
       quoting  on  the  command line to prevent them from being inter-
       preted immediately as patterns and the patterns are shown  below
       in single quotes as a reminder.

       '?'    The  pattern  character  ?  wherever it occurs, including
              when preceding a parenthesis with KSH_GLOB.

       '*'    The pattern character *  wherever  it  occurs,  including
              recursive  globbing and when preceding a parenthesis with
              KSH_GLOB.

       '['    Character classes.

       '<' (NO_SH_GLOB)
              Numeric ranges.

       '|' (NO_SH_GLOB)
              Alternation in  grouped  patterns,  case  statements,  or
              KSH_GLOB parenthesised expressions.

       '(' (NO_SH_GLOB)
              Grouping  using  single parentheses.  Disabling this does
              not disable the use of  parentheses  for  KSH_GLOB  where
              they  are introduced by a special character, nor for glob
              qualifiers (use  `setopt  NO_BARE_GLOB_QUAL'  to  disable
              glob qualifiers that use parentheses only).

       '~' (EXTENDED_GLOB)
              Exclusion in the form A~B.

       '^' (EXTENDED_GLOB)
              Exclusion in the form A^B.

       '#' (EXTENDED_GLOB)
              The pattern character # wherever it occurs, both for rep-
              etition of a previous pattern and for indicating globbing
              flags.

       '?(' (KSH_GLOB)
              The  grouping form ?(...).  Note this is also disabled if
              '?' is disabled.

       '*(' (KSH_GLOB)
              The grouping form *(...).  Note this is also disabled  if
              '*' is disabled.

       '+(' (KSH_GLOB)
              The grouping form +(...).

       '!(' (KSH_GLOB)
              The grouping form !(...).

       '@(' (KSH_GLOB)
              The grouping form @(...).
