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ZSHBUILTINS(1) ZSHBUILTINS(1)
NAME
zshbuiltins - zsh built-in commands
SHELL BUILTIN COMMANDS
- simple command
See the section `Precommand Modifiers'.
. file [ arg ... ]
Read commands from file and execute them in the current shell environment.
If file does not contain a slash, or if PATH_DIRS is set, the shell looks in the components of
$path to find the directory containing file. Files in the current directory are not read
unless `.' appears somewhere in $path. If a file named `file.zwc' is found, is newer than
file, and is the compiled form (created with the zcompile builtin) of file, then commands are
read from that file instead of file.
If any arguments arg are given, they become the positional parameters; the old positional
parameters are restored when the file is done executing. If file was not found the return
status is 127; if file was found but contained a syntax error the return status is 126; else
the return status is the exit status of the last command executed.
: [ arg ... ]
This command does nothing, although normal argument expansions is performed which may have
effects on shell parameters. A zero exit status is returned.
alias [ {+|-}gmrsL ] [ name[=value] ... ]
For each name with a corresponding value, define an alias with that value. A trailing space
in value causes the next word to be checked for alias expansion. If the -g flag is present,
define a global alias; global aliases are expanded even if they do not occur in command posi-tion. position.
tion.
If the -s flags is present, define a suffix alias: if the command word on a command line is in
the form `text.name', where text is any non-empty string, it is replaced by the text `value
text.name'. Note that name is treated as a literal string, not a pattern. A trailing space
in value is not special in this case. For example,
alias -s ps=gv
will cause the command `*.ps' to be expanded to `gv *.ps'. As alias expansion is carried out
earlier than globbing, the `*.ps' will then be expanded. Suffix aliases constitute a differ-ent different
ent name space from other aliases (so in the above example it is still possible to create an
alias for the command ps) and the two sets are never listed together.
For each name with no value, print the value of name, if any. With no arguments, print all
currently defined aliases other than suffix aliases. If the -m flag is given the arguments
are taken as patterns (they should be quoted to preserve them from being interpreted as glob
patterns), and the aliases matching these patterns are printed. When printing aliases and one
of the -g, -r or -s flags is present, restrict the printing to global, regular or suffix
aliases, respectively; a regular alias is one which is neither a global nor a suffix alias.
Using `+' instead of `-', or ending the option list with a single `+', prevents the values of
the aliases from being printed.
If the -L flag is present, then print each alias in a manner suitable for putting in a startup
script. The exit status is nonzero if a name (with no value) is given for which no alias has
been defined.
For more on aliases, include common problems, see the section ALIASING in zshmisc(1).
autoload [ {+|-}UXkmtz ] [ -w ] [ name ... ]
Equivalent to functions -u, with the exception of -X/+X and -w.
The flag -X may be used only inside a shell function, and may not be followed by a name. It
causes the calling function to be marked for autoloading and then immediately loaded and exe-cuted, executed,
cuted, with the current array of positional parameters as arguments. This replaces the previ-ous previous
ous definition of the function. If no function definition is found, an error is printed and
the function remains undefined and marked for autoloading.
The flag +X attempts to load each name as an autoloaded function, but does not execute it.
The exit status is zero (success) if the function was not previously defined and a definition
for it was found. This does not replace any existing definition of the function. The exit
status is nonzero (failure) if the function was already defined or when no definition was
found. In the latter case the function remains undefined and marked for autoloading. If
ksh-style autoloading is enabled, the function created will contain the contents of the file
plus a call to the function itself appended to it, thus giving normal ksh autoloading behav-iour behaviour
iour on the first call to the function. If the -m flag is also given each name is treated as
a pattern and all functions already marked for autoload that match the pattern are loaded.
With the -w flag, the names are taken as names of files compiled with the zcompile builtin,
and all functions defined in them are marked for autoloading.
The flags -z and -k mark the function to be autoloaded using the zsh or ksh style, as if the
option KSH_AUTOLOAD were unset or were set, respectively. The flags override the setting of
the option at the time the function is loaded.
Note that the autoload command makes no attempt to ensure the shell options set during the
loading or execution of the file have any particular value. For this, the emulate command can
be used:
emulate zsh -c 'autoload -Uz func'
arranges that when func is loaded the shell is in native zsh emulation, and this emulation is
also applied when func is run.
bg [ job ... ]
job ... &
Put each specified job in the background, or the current job if none is specified.
bindkey
See the section `Zle Builtins' in zshzle(1).
break [ n ]
Exit from an enclosing for, while, until, select or repeat loop. If n is specified, then
break n levels instead of just one.
builtin name [ args ... ]
Executes the builtin name, with the given args.
bye Same as exit.
cap See the section `The zsh/cap Module' in zshmodules(1).
cd [ -qsLP ] [ arg ]
cd [ -qsLP ] old new
cd [ -qsLP ] {+|-}n
Change the current directory. In the first form, change the current directory to arg, or to
the value of $HOME if arg is not specified. If arg is `-', change to the previous directory.
Otherwise, if arg begins with a slash, attempt to change to the directory given by arg.
If arg does not begin with a slash, the behaviour depends on whether the current directory `.'
occurs in the list of directories contained in the shell parameter cdpath. If it does not,
first attempt to change to the directory arg under the current directory, and if that fails
but cdpath is set and contains at least one element attempt to change to the directory arg
under each component of cdpath in turn until successful. If `.' occurs in cdpath, then cdpath
is searched strictly in order so that `.' is only tried at the appropriate point.
The order of testing cdpath is modified if the option POSIX_CD is set, as described in the
documentation for the option.
If no directory is found, the option CDABLE_VARS is set, and a parameter named arg exists
whose value begins with a slash, treat its value as the directory. In that case, the parame-ter parameter
ter is added to the named directory hash table.
The second form of cd substitutes the string new for the string old in the name of the current
directory, and tries to change to this new directory.
The third form of cd extracts an entry from the directory stack, and changes to that direc-tory. directory.
tory. An argument of the form `+n' identifies a stack entry by counting from the left of the
list shown by the dirs command, starting with zero. An argument of the form `-n' counts from
the right. If the PUSHD_MINUS option is set, the meanings of `+' and `-' in this context are
swapped.
If the -q (quiet) option is specified, the hook function chpwd and the functions in the array
chpwd_functions are not called. This is useful for calls to cd that do not change the envi-ronment environment
ronment seen by an interactive user.
If the -s option is specified, cd refuses to change the current directory if the given path-name pathname
name contains symlinks. If the -P option is given or the CHASE_LINKS option is set, symbolic
links are resolved to their true values. If the -L option is given symbolic links are
retained in the directory (and not resolved) regardless of the state of the CHASE_LINKS
option.
chdir Same as cd.
clone See the section `The zsh/clone Module' in zshmodules(1).
command [ -pvV ] simple command
The simple command argument is taken as an external command instead of a function or builtin
and is executed. If the POSIX_BUILTINS option is set, builtins will also be executed but cer-tain certain
tain special properties of them are suppressed. The -p flag causes a default path to be
searched instead of that in $path. With the -v flag, command is similar to whence and with -V,
it is equivalent to whence -v.
See also the section `Precommand Modifiers'.
comparguments
See the section `The zsh/computil Module' in zshmodules(1).
compcall
See the section `The zsh/compctl Module' in zshmodules(1).
compctl
See the section `The zsh/compctl Module' in zshmodules(1).
compdescribe
See the section `The zsh/computil Module' in zshmodules(1).
compfiles
See the section `The zsh/computil Module' in zshmodules(1).
compgroups
See the section `The zsh/computil Module' in zshmodules(1).
compquote
See the section `The zsh/computil Module' in zshmodules(1).
comptags
See the section `The zsh/computil Module' in zshmodules(1).
comptry
See the section `The zsh/computil Module' in zshmodules(1).
compvalues
See the section `The zsh/computil Module' in zshmodules(1).
continue [ n ]
Resume the next iteration of the enclosing for, while, until, select or repeat loop. If n is
specified, break out of n-1 loops and resume at the nth enclosing loop.
declare
Same as typeset.
dirs [ -c ] [ arg ... ]
dirs [ -lpv ]
With no arguments, print the contents of the directory stack. Directories are added to this
stack with the pushd command, and removed with the cd or popd commands. If arguments are
specified, load them onto the directory stack, replacing anything that was there, and push the
current directory onto the stack.
-c clear the directory stack.
-l print directory names in full instead of using of using ~ expressions.
-p print directory entries one per line.
-v number the directories in the stack when printing.
disable [ -afmrs ] name ...
Temporarily disable the named hash table elements. The default is to disable builtin com-mands. commands.
mands. 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 dis-able disable
able 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 arguments 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.
abled. Disabled objects can be enabled with the enable command.
disown [ job ... ]
job ... &|
job ... &!
Remove the specified jobs from the job table; the shell will no longer report their status,
and will not complain if you try to exit an interactive shell with them running or stopped.
If no job is specified, disown the current job.
If the jobs are currently stopped and the AUTO_CONTINUE option is not set, a warning is
printed containing information about how to make them running after they have been disowned.
If one of the latter two forms is used, the jobs will automatically be made running, indepen-dent independent
dent of the setting of the AUTO_CONTINUE option.
echo [ -neE ] [ arg ... ]
Write each arg on the standard output, with a space separating each one. If the -n flag is
not present, print a newline at the end. echo recognizes the following escape sequences:
\a bell character
\b backspace
\c suppress final newline
\e escape
\f form feed
\n linefeed (newline)
\r carriage return
\t horizontal tab
\v vertical tab
\\ backslash
\0NNN character code in octal
\xNN character code in hexadecimal
\uNNNN unicode character code in hexadecimal
\UNNNNNNNN
unicode character code in hexadecimal
The -E flag, or the BSD_ECHO option, can be used to disable these escape sequences. In the
latter case, -e flag can be used to enable them.
echotc See the section `The zsh/termcap Module' in zshmodules(1).
echoti See the section `The zsh/terminfo Module' in zshmodules(1).
emulate [ -LR ] [ {zsh|sh|ksh|csh} [ flags ... ] ]
Without any argument print current emulation mode.
With single argument set up zsh options to emulate the specified shell as much as possible.
csh will never be fully emulated. If the argument is not one of the shells listed above, zsh
will be used as a default; more precisely, the tests performed on the argument are the same as
those used to determine the emulation at startup based on the shell name, see the section COM-PATIBILITY COMPATIBILITY
PATIBILITY in zsh(1) .
If the emulate command occurs inside a function that has been marked for execution tracing
with functions -t then the xtrace option will be turned on regardless of emulation mode or
other options. Note that code executed inside the function by the ., source, or eval commands
is not considered to be running directly from the function, hence does not provoke this behav-iour. behaviour.
iour.
If the -R switch is given, all settable options are reset to their default value corresponding
to the specified emulation mode, except for certain options describing the interactive envi-ronment; environment;
ronment; otherwise, only those options likely to cause portability problems in scripts and
functions are altered. If the -L switch is given, the options LOCAL_OPTIONS and LOCAL_TRAPS
will be set as well, causing the effects of the emulate command and any setopt and trap com-mands commands
mands to be local to the immediately surrounding shell function, if any; normally these
options are turned off in all emulation modes except ksh. The -L switch is mutually exclusive
with the use of -c in flags.
The flags may be any of the invocation-time flags described in the section INVOCATION in
zsh(1), except that `-o EMACS' and `-o VI' may not be used. Flags such as `+r'/`+o
RESTRICTED' may be prohibited in some circumstances.
If -c arg appears in flags, arg is evaluated while the requested emulation is temporarily in
effect. In this case the emulation mode and all options are restored to their previous values
before emulate returns. The -R switch may precede the name of the shell to emulate; note this
has a meaning distinct from including -R in flags.
Use of -c enables `sticky' emulation mode for functions defined within the evaluated expres-sion: expression:
sion: the emulation mode is associated thereafter with the function so that whenever the
function is executed the emulation (respecting the -R switch, if present) and all options are
set before entry to the function, and restored after exit. If the function is called when the
sticky emulation is already in effect, either within an `emulate shell -c' expression or
within another function with the same sticky emulation, entry and exit from the function do
not cause options to be altered (except due to standard processing such as the LOCAL_OPTIONS
option). This also applies to functions marked for autoload within the sticky emulation; the
appropriate set of options will be applied at the point the function is loaded as well as when
it is run.
For example:
emulate sh -c 'fni() { setopt cshnullglob; }
fno() { fni; }'
fno
The two functions fni and fno are defined with sticky sh emulation. fno is then executed,
causing options associated with emulations to be set to their values in sh. fni then calls
fno; because fno is also marked for sticky sh emulation, no option changes take place on entry
to or exit from it. Hence the option cshnullglob, turned off by sh emulation, will be turned
on within fni and remain on on return to fno. On exit from fno, the emulation mode and all
options will be restored to the state they were in before entry to the temporary emulation.
The documentation above is typically sufficient for the intended purpose of executing code
designed for other shells in a suitable environment. More detailed rules follow.
1. The sticky emulation environment provided by `emulate shell -c' is identical to that
provided by entry to a function marked for sticky emulation as a consequence of being
defined in such an environment. Hence, for example, the sticky emulation is inherited
by subfunctions defined within functions with sticky emulation.
2. No change of options takes place on entry to or exit from functions that are not marked
for sticky emulation, other than those that would normally take place, even if those
functions are called within sticky emulation.
3. No special handling is provided for functions marked for autoload nor for functions
present in wordcode created by the zcompile command.
4. The presence or absence of the -R switch to emulate corresponds to different sticky
emulation modes, so for example `emulate sh -c', `emulate -R sh -c' and `emulate csh
-c' are treated as three distinct sticky emulations.
5. Difference in shell options supplied in addition to the basic emulation also mean the
sticky emulations are different, so for example `emulate zsh -c' and `emulate zsh -o
cbases -c' are treated as distinct sticky emulations.
enable [ -afmrs ] name ...
Enable the named hash table elements, presumably disabled earlier with disable. The default
is to enable builtin commands. The -a option causes enable to act on regular or global
aliases. The -s option causes enable to act on suffix aliases. The -f option causes enable
to act on shell functions. The -r option causes enable to act on reserved words. Without
arguments all enabled hash table elements from the corresponding hash table are printed. With
the -m flag the arguments are taken as patterns (should be quoted) and all hash table elements
from the corresponding hash table matching these patterns are enabled. Enabled objects can be
disabled with the disable builtin command.
eval [ arg ... ]
Read the arguments as input to the shell and execute the resulting command(s) in the current
shell process. The return status is the same as if the commands had been executed directly by
the shell; if there are no args or they contain no commands (i.e. are an empty string or
whitespace) the return status is zero.
exec [ -cl ] [ -a argv_ ] simple command
Replace the current shell with an external command rather than forking. With -c clear the
environment; with -l prepend - to the argv[0] string of the command executed (to simulate a
login shell); with -a argv_ set the argv[0] string of the command executed. See the section
`Precommand Modifiers'.
exit [ n ]
Exit the shell with the exit status specified by n; if none is specified, use the exit status
from the last command executed. An EOF condition will also cause the shell to exit, unless
the IGNORE_EOF option is set.
export [ name[=value] ... ]
The specified names are marked for automatic export to the environment of subsequently exe-cuted executed
cuted commands. Equivalent to typeset -gx. If a parameter specified does not already exist,
it is created in the global scope.
false [ arg ... ]
Do nothing and return an exit status of 1.
fc [ -e ename ] [ -m match ] [ old=new ... ] [ first [ last ] ]
fc -l [ -nrdfEiD ] [ -t timefmt ] [ -m match ]
[ old=new ... ] [ first [ last ] ]
fc -p [ -a ] [ filename [ histsize [ savehistsize ] ] ]
fc -P
fc -ARWI [ filename ]
Select a range of commands from first to last from the history list. The arguments first and
last may be specified as a number or as a string. A negative number is used as an offset to
the current history event number. A string specifies the most recent event beginning with the
given string. All substitutions old=new, if any, are then performed on the commands.
If the -l flag is given, the resulting commands are listed on standard output. If the -m flag
is also given the first argument is taken as a pattern (should be quoted) and only the history
events matching this pattern will be shown. Otherwise the editor program ename is invoked on
a file containing these history events. If ename is not given, the value of the parameter
FCEDIT is used; if that is not set the value of the parameter EDITOR is used; if that is not
set a builtin default, usually `vi' is used. If ename is `-', no editor is invoked. When
editing is complete, the edited command is executed.
If first is not specified, it will be set to -1 (the most recent event), or to -16 if the -l
flag is given. If last is not specified, it will be set to first, or to -1 if the -l flag is
given.
The flag -r reverses the order of the commands and the flag -n suppresses command numbers when
listing.
Also when listing,
-d prints timestamps for each command
-f prints full time-date stamps in the US `MM/DD/YY hh:mm' format
-E prints full time-date stamps in the European `dd.mm.yyyy hh:mm' format
-i prints full time-date stamps in ISO8601 `yyyy-mm-dd hh:mm' format
-t fmt prints time and date stamps in the given format; fmt is formatted with the strftime
function with the zsh extensions described for the %D{string} prompt format in the sec-tion section
tion EXPANSION OF PROMPT SEQUENCES in zshmisc(1). The resulting formatted string must
be no more than 256 characters or will not be printed.
-D prints elapsed times; may be combined with one of the options above.
`fc -p' pushes the current history list onto a stack and switches to a new history list. If
the -a option is also specified, this history list will be automatically popped when the cur-rent current
rent function scope is exited, which is a much better solution than creating a trap function
to call `fc -P' manually. If no arguments are specified, the history list is left empty,
$HISTFILE is unset, and $HISTSIZE & $SAVEHIST are set to their default values. If one argu-ment argument
ment is given, $HISTFILE is set to that filename, $HISTSIZE & $SAVEHIST are left unchanged,
and the history file is read in (if it exists) to initialize the new list. If a second argu-ment argument
ment is specified, $HISTSIZE & $SAVEHIST are instead set to the single specified numeric
value. Finally, if a third argument is specified, $SAVEHIST is set to a separate value from
$HISTSIZE. You are free to change these environment values for the new history list however
you desire in order to manipulate the new history list.
`fc -P' pops the history list back to an older list saved by `fc -p'. The current list is
saved to its $HISTFILE before it is destroyed (assuming that $HISTFILE and $SAVEHIST are set
appropriately, of course). The values of $HISTFILE, $HISTSIZE, and $SAVEHIST are restored to
the values they had when `fc -p' was called. Note that this restoration can conflict with
making these variables "local", so your best bet is to avoid local declarations for these
variables in functions that use `fc -p'. The one other guaranteed-safe combination is declar-ing declaring
ing these variables to be local at the top of your function and using the automatic option
(-a) with `fc -p'. Finally, note that it is legal to manually pop a push marked for automatic
popping if you need to do so before the function exits.
`fc -R' reads the history from the given file, `fc -W' writes the history out to the given
file, and `fc -A' appends the history out to the given file. If no filename is specified, the
$HISTFILE is assumed. If the -I option is added to -R, only those events that are not already
contained within the internal history list are added. If the -I option is added to -A or -W,
only those events that are new since last incremental append/write to the history file are
appended/written. In any case, the created file will have no more than $SAVEHIST entries.
fg [ job ... ]
job ...
Bring each specified job in turn to the foreground. If no job is specified, resume the cur-rent current
rent job.
float [ {+|-}EFHghlprtux ] [ -LRZ [ n ]] [ name[=value] ... ]
Equivalent to typeset -E, except that options irrelevant to floating point numbers are not
permitted.
functions [ {+|-}UXkmtTuz ] [ name ... ]
functions -M mathfn [ min [ max [ shellfn ] ] ]
functions -M [ -m pattern ... ]
functions +M [ -m ] mathfn
Equivalent to typeset -f, with the exception of the -M option. Use of the -M option may not
be combined with any of the options handled by typeset -f.
functions -M mathfn defines mathfn as the name of a mathematical function recognised in all
forms of arithmetical expressions; see the section `Arithmetic Evaluation' in zshmisc(1). By
default mathfn may take any number of comma-separated arguments. If min is given, it must
have exactly min args; if min and max are both given, it must have at least min and at most
max args. max may be -1 to indicate that there is no upper limit.
By default the function is implemented by a shell function of the same name; if shellfn is
specified it gives the name of the corresponding shell function while mathfn remains the name
used in arithmetical expressions. The name of the function in $0 is mathfn (not shellfn as
would usually be the case), provided the option FUNCTION_ARGZERO is in effect. The positional
parameters in the shell function correspond to the arguments of the mathematical function
call. The result of the last arithmetical expression evaluated inside the shell function
(even if it is a form that normally only returns a status) gives the result of the mathemati-cal mathematical
cal function.
functions -M with no arguments lists all such user-defined functions in the same form as a
definition. With the additional option -m and a list of arguments, all functions whose mathfn
matches one of the pattern arguments are listed.
function +M removes the list of mathematical functions; with the additional option -m the
arguments are treated as patterns and all functions whose mathfn matches the pattern are
removed. Note that the shell function implementing the behaviour is not removed (regardless
of whether its name coincides with mathfn).
For example, the following prints the cube of 3:
zmath_cube() { (( $1 * $1 * $1 )) }
functions -M cube 1 1 zmath_cube
print $(( cube(3) ))
getcap See the section `The zsh/cap Module' in zshmodules(1).
getln [ -AclneE ] name ...
Read the top value from the buffer stack and put it in the shell parameter name. Equivalent
to read -zr.
getopts optstring name [ arg ... ]
Checks the args for legal options. If the args are omitted, use the positional parameters. A
valid option argument begins with a `+' or a `-'. An argument not beginning with a `+' or a
`-', or the argument `--', ends the options. Note that a single `-' is not considered a valid
option argument. optstring contains the letters that getopts recognizes. If a letter is fol-lowed followed
lowed by a `:', that option requires an argument. The options can be separated from the argu-ment argument
ment by blanks.
Each time it is invoked, getopts places the option letter it finds in the shell parameter
name, prepended with a `+' when arg begins with a `+'. The index of the next arg is stored in
OPTIND. The option argument, if any, is stored in OPTARG.
The first option to be examined may be changed by explicitly assigning to OPTIND. OPTIND has
an initial value of 1, and is normally reset to 1 upon exit from a shell function. OPTARG is
not reset and retains its value from the most recent call to getopts. If either of OPTIND or
OPTARG is explicitly unset, it remains unset, and the index or option argument is not stored.
The option itself is still stored in name in this case.
A leading `:' in optstring causes getopts to store the letter of any invalid option in OPTARG,
and to set name to `?' for an unknown option and to `:' when a required argument is missing.
Otherwise, getopts sets name to `?' and prints an error message when an option is invalid.
The exit status is nonzero when there are no more options.
hash [ -Ldfmrv ] [ name[=value] ] ...
hash can be used to directly modify the contents of the command hash table, and the named
directory hash table. Normally one would modify these tables by modifying one's PATH (for the
command hash table) or by creating appropriate shell parameters (for the named directory hash
table). The choice of hash table to work on is determined by the -d option; without the
option the command hash table is used, and with the option the named directory hash table is
used.
Given no arguments, and neither the -r or -f options, the selected hash table will be listed
in full.
The -r option causes the selected hash table to be emptied. It will be subsequently rebuilt
in the normal fashion. The -f option causes the selected hash table to be fully rebuilt imme-diately. immediately.
diately. For the command hash table this hashes all the absolute directories in the PATH, and
for the named directory hash table this adds all users' home directories. These two options
cannot be used with any arguments.
The -m option causes the arguments to be taken as patterns (which should be quoted) and the
elements of the hash table matching those patterns are printed. This is the only way to dis-play display
play a limited selection of hash table elements.
For each name with a corresponding value, put `name' in the selected hash table, associating
it with the pathname `value'. In the command hash table, this means that whenever `name' is
used as a command argument, the shell will try to execute the file given by `value'. In the
named directory hash table, this means that `value' may be referred to as `~name'.
For each name with no corresponding value, attempt to add name to the hash table, checking
what the appropriate value is in the normal manner for that hash table. If an appropriate
value can't be found, then the hash table will be unchanged.
The -v option causes hash table entries to be listed as they are added by explicit specifica-tion. specification.
tion. If has no effect if used with -f.
If the -L flag is present, then each hash table entry is printed in the form of a call to
hash.
history
Same as fc -l.
integer [ {+|-}Hghilprtux ] [ -LRZ [ n ]] [ name[=value] ... ]
Equivalent to typeset -i, except that options irrelevant to integers are not permitted.
jobs [ -dlprs ] [ job ... ]
jobs -Z string
Lists information about each given job, or all jobs if job is omitted. The -l flag lists
process IDs, and the -p flag lists process groups. If the -r flag is specified only running
jobs will be listed and if the -s flag is given only stopped jobs are shown. If the -d flag
is given, the directory from which the job was started (which may not be the current directory
of the job) will also be shown.
The -Z option replaces the shell's argument and environment space with the given string, trun-cated truncated
cated if necessary to fit. This will normally be visible in ps (ps(1)) listings. This fea-ture feature
ture is typically used by daemons, to indicate their state.
kill [ -s signal_name | -n signal_number | -sig ] job ...
kill -l [ sig ... ]
Sends either SIGTERM or the specified signal to the given jobs or processes. Signals are
given by number or by names, with or without the `SIG' prefix. If the signal being sent is
not `KILL' or `CONT', then the job will be sent a `CONT' signal if it is stopped. The argu-ment argument
ment job can be the process ID of a job not in the job list. In the second form, kill -l, if
sig is not specified the signal names are listed. Otherwise, for each sig that is a name, the
corresponding signal number is listed. For each sig that is a signal number or a number rep-resenting representing
resenting the exit status of a process which was terminated or stopped by a signal the name of
the signal is printed.
On some systems, alternative signal names are allowed for a few signals. Typical examples are
SIGCHLD and SIGCLD or SIGPOLL and SIGIO, assuming they correspond to the same signal number.
kill -l will only list the preferred form, however kill -l alt will show if the alternative
form corresponds to a signal number. For example, under Linux kill -l IO and kill -l POLL
both output 29, hence kill -IO and kill -POLL have the same effect.
Many systems will allow process IDs to be negative to kill a process group or zero to kill the
current process group.
let arg ...
Evaluate each arg as an arithmetic expression. See the section `Arithmetic Evaluation' in
zshmisc(1) for a description of arithmetic expressions. The exit status is 0 if the value of
the last expression is nonzero, 1 if it is zero, and 2 if an error occurred.
limit [ -hs ] [ resource [ limit ] ] ...
Set or display resource limits. Unless the -s flag is given, the limit applies only the chil-dren children
dren of the shell. If -s is given without other arguments, the resource limits of the current
shell is set to the previously set resource limits of the children.
If limit is not specified, print the current limit placed on resource, otherwise set the limit
to the specified value. If the -h flag is given, use hard limits instead of soft limits. If
no resource is given, print all limits.
When looping over multiple resources, the shell will abort immediately if it detects a badly
formed argument. However, if it fails to set a limit for some other reason it will continue
trying to set the remaining limits.
resource can be one of:
addressspace
Maximum amount of address space used.
aiomemorylocked
Maximum amount of memory locked in RAM for AIO operations.
aiooperations
Maximum number of AIO operations.
cachedthreads
Maximum number of cached threads.
coredumpsize
Maximum size of a core dump.
cputime
Maximum CPU seconds per process.
datasize
Maximum data size (including stack) for each process.
descriptors
Maximum value for a file descriptor.
filesize
Largest single file allowed.
maxproc
Maximum number of processes.
maxpthreads
Maximum number of threads per process.
memorylocked
Maximum amount of memory locked in RAM.
memoryuse
Maximum resident set size.
msgqueue
Maximum number of bytes in POSIX message queues.
resident
Maximum resident set size.
sigpending
Maximum number of pending signals.
sockbufsize
Maximum size of all socket buffers.
stacksize
Maximum stack size for each process.
vmemorysize
Maximum amount of virtual memory.
Which of these resource limits are available depends on the system. resource can be abbrevi-ated abbreviated
ated to any unambiguous prefix. It can also be an integer, which corresponds to the integer
defined for the resource by the operating system.
If argument corresponds to a number which is out of the range of the resources configured into
the shell, the shell will try to read or write the limit anyway, and will report an error if
this fails. As the shell does not store such resources internally, an attempt to set the
limit will fail unless the -s option is present.
limit is a number, with an optional scaling factor, as follows:
nh hours
nk kilobytes (default)
nm megabytes or minutes
[mm:]ss
minutes and seconds
The limit command is not made available by default when the shell starts in a mode emulating
another shell. It can be made available with the command `zmodload -F zsh/rlimits b:limit'.
local [ {+|-}AEFHUahlprtux ] [ -LRZi [ n ]] [ name[=value] ] ...
Same as typeset, except that the options -g, and -f are not permitted. In this case the -x
option does not force the use of -g, i.e. exported variables will be local to functions.
log List all users currently logged in who are affected by the current setting of the watch param-eter. parameter.
eter.
logout [ n ]
Same as exit, except that it only works in a login shell.
noglob simple command
See the section `Precommand Modifiers'.
popd [ [-q] {+|-}n ]
Remove an entry from the directory stack, and perform a cd to the new top directory. With no
argument, the current top entry is removed. An argument of the form `+n' identifies a stack
entry by counting from the left of the list shown by the dirs command, starting with zero. An
argument of the form -n counts from the right. If the PUSHD_MINUS option is set, the meanings
of `+' and `-' in this context are swapped.
If the -q (quiet) option is specified, the hook function chpwd and the functions in the array
$chpwd_functions are not called, and the new directory stack is not printed. This is useful
for calls to popd that do not change the environment seen by an interactive user.
print [ -abcDilmnNoOpPrsSz ] [ -u n ] [ -f format ] [ -C cols ]
[ -R [ -en ]] [ arg ... ]
With the `-f' option the arguments are printed as described by printf. With no flags or with
the flag `-', the arguments are printed on the standard output as described by echo, with the
following differences: the escape sequence `\M-x' metafies the character x (sets the highest
bit), `\C-x' produces a control character (`\C-@' and `\C-?' give the characters NUL and
delete), and `\E' is a synonym for `\e'. Finally, if not in an escape sequence, `\' escapes
the following character and is not printed.
-a Print arguments with the column incrementing first. Only useful with the -c and -C
options.
-b Recognize all the escape sequences defined for the bindkey command, see zshzle(1).
-c Print the arguments in columns. Unless -a is also given, arguments are printed with
the row incrementing first.
-C cols
Print the arguments in cols columns. Unless -a is also given, arguments are printed
with the row incrementing first.
-D Treat the arguments as directory names, replacing prefixes with ~ expressions, as
appropriate.
-i If given together with -o or -O, sorting is performed case-independently.
-l Print the arguments separated by newlines instead of spaces.
-m Take the first argument as a pattern (should be quoted), and remove it from the argu-ment argument
ment list together with subsequent arguments that do not match this pattern.
-n Do not add a newline to the output.
-N Print the arguments separated and terminated by nulls.
-o Print the arguments sorted in ascending order.
-O Print the arguments sorted in descending order.
-p Print the arguments to the input of the coprocess.
-P Perform prompt expansion (see EXPANSION OF PROMPT SEQUENCES in zshmisc(1)).
-r Ignore the escape conventions of echo.
-R Emulate the BSD echo command, which does not process escape sequences unless the -e
flag is given. The -n flag suppresses the trailing newline. Only the -e and -n flags
are recognized after -R; all other arguments and options are printed.
-s Place the results in the history list instead of on the standard output. Each argument
to the print command is treated as a single word in the history, regardless of its con-tent. content.
tent.
-S Place the results in the history list instead of on the standard output. In this case
only a single argument is allowed; it will be split into words as if it were a full
shell command line. The effect is similar to reading the line from a history file with
the HIST_LEX_WORDS option active.
-u n Print the arguments to file descriptor n.
-z Push the arguments onto the editing buffer stack, separated by spaces.
If any of `-m', `-o' or `-O' are used in combination with `-f' and there are no arguments
(after the removal process in the case of `-m') then nothing is printed.
printf format [ arg ... ]
Print the arguments according to the format specification. Formatting rules are the same as
used in C. The same escape sequences as for echo are recognised in the format. All C conver-sion conversion
sion specifications ending in one of csdiouxXeEfgGn are handled. In addition to this, `%b' can
be used instead of `%s' to cause escape sequences in the argument to be recognised and `%q'
can be used to quote the argument in such a way that allows it to be reused as shell input.
With the numeric format specifiers, if the corresponding argument starts with a quote charac-ter, character,
ter, the numeric value of the following character is used as the number to print otherwise the
argument is evaluated as an arithmetic expression. See the section `Arithmetic Evaluation' in
zshmisc(1) for a description of arithmetic expressions. With `%n', the corresponding argument
is taken as an identifier which is created as an integer parameter.
Normally, conversion specifications are applied to each argument in order but they can explic-itly explicitly
itly specify the nth argument is to be used by replacing `%' by `%n$' and `*' by `*n$'. It is
recommended that you do not mix references of this explicit style with the normal style and
the handling of such mixed styles may be subject to future change.
If arguments remain unused after formatting, the format string is reused until all arguments
have been consumed. With the print builtin, this can be suppressed by using the -r option. If
more arguments are required by the format than have been specified, the behaviour is as if
zero or an empty string had been specified as the argument.
pushd [ -qsLP ] [ arg ]
pushd [ -qsLP ] old new
pushd [ -qsLP ] {+|-}n
Change the current directory, and push the old current directory onto the directory stack. In
the first form, change the current directory to arg. If arg is not specified, change to the
second directory on the stack (that is, exchange the top two entries), or change to $HOME if
the PUSHD_TO_HOME option is set or if there is only one entry on the stack. Otherwise, arg is
interpreted as it would be by cd. The meaning of old and new in the second form is also the
same as for cd.
The third form of pushd changes directory by rotating the directory list. An argument of the
form `+n' identifies a stack entry by counting from the left of the list shown by the dirs
command, starting with zero. An argument of the form `-n' counts from the right. If the
PUSHD_MINUS option is set, the meanings of `+' and `-' in this context are swapped.
If the -q (quiet) option is specified, the hook function chpwd and the functions in the array
$chpwd_functions are not called, and the new directory stack is not printed. This is useful
for calls to pushd that do not change the environment seen by an interactive user.
If the option -q is not specified and the shell option PUSHD_SILENT is not set, the directory
stack will be printed after a pushd is performed.
The options -s, -L and -P have the same meanings as for the cd builtin.
pushln [ arg ... ]
Equivalent to print -nz.
pwd [ -rLP ]
Print the absolute pathname of the current working directory. If the -r or the -P flag is
specified, or the CHASE_LINKS option is set and the -L flag is not given, the printed path
will not contain symbolic links.
r Same as fc -e -.
read [ -rszpqAclneE ] [ -t [ num ] ] [ -k [ num ] ] [ -d delim ]
[ -u n ] [ name[?prompt] ] [ name ... ]
Read one line and break it into fields using the characters in $IFS as separators, except as
noted below. The first field is assigned to the first name, the second field to the second
name, etc., with leftover fields assigned to the last name. If name is omitted then REPLY is
used for scalars and reply for arrays.
-r Raw mode: a `\' at the end of a line does not signify line continuation and backslashes
in the line don't quote the following character and are not removed.
-s Don't echo back characters if reading from the terminal. Currently does not work with
the -q option.
-q Read only one character from the terminal and set name to `y' if this character was `y'
or `Y' and to `n' otherwise. With this flag set the return status is zero only if the
character was `y' or `Y'. This option may be used with a timeout; if the read times
out, or encounters end of file, status 2 is returned. Input is read from the terminal
unless one of -u or -p is present. This option may also be used within zle widgets.
-k [ num ]
Read only one (or num) characters. All are assigned to the first name, without word
splitting. This flag is ignored when -q is present. Input is read from the terminal
unless one of -u or -p is present. This option may also be used within zle widgets.
Note that despite the mnemonic `key' this option does read full characters, which may
consist of multiple bytes if the option MULTIBYTE is set.
-z Read one entry from the editor buffer stack and assign it to the first name, without
word splitting. Text is pushed onto the stack with `print -z' or with push-line from
the line editor (see zshzle(1)). This flag is ignored when the -k or -q flags are
present.
-e
-E The input read is printed (echoed) to the standard output. If the -e flag is used, no
input is assigned to the parameters.
-A The first name is taken as the name of an array and all words are assigned to it.
-c
-l These flags are allowed only if called inside a function used for completion (specified
with the -K flag to compctl). If the -c flag is given, the words of the current com-mand command
mand are read. If the -l flag is given, the whole line is assigned as a scalar. If
both flags are present, -l is used and -c is ignored.
-n Together with -c, the number of the word the cursor is on is read. With -l, the index
of the character the cursor is on is read. Note that the command name is word number
1, not word 0, and that when the cursor is at the end of the line, its character index
is the length of the line plus one.
-u n Input is read from file descriptor n.
-p Input is read from the coprocess.
-d delim
Input is terminated by the first character of delim instead of by newline.
-t [ num ]
Test if input is available before attempting to read. If num is present, it must begin
with a digit and will be evaluated to give a number of seconds, which may be a floating
point number; in this case the read times out if input is not available within this
time. If num is not present, it is taken to be zero, so that read returns immediately
if no input is available. If no input is available, return status 1 and do not set any
variables.
This option is not available when reading from the editor buffer with -z, when called
from within completion with -c or -l, with -q which clears the input queue before read-ing, reading,
ing, or within zle where other mechanisms should be used to test for input.
Note that read does not attempt to alter the input processing mode. The default mode
is canonical input, in which an entire line is read at a time, so usually `read -t'
will not read anything until an entire line has been typed. However, when reading from
the terminal with -k input is processed one key at a time; in this case, only avail-ability availability
ability of the first character is tested, so that e.g. `read -t -k 2' can still block
on the second character. Use two instances of `read -t -k' if this is not what is
wanted.
If the first argument contains a `?', the remainder of this word is used as a prompt on stan-dard standard
dard error when the shell is interactive.
The value (exit status) of read is 1 when an end-of-file is encountered, or when -c or -l is
present and the command is not called from a compctl function, or as described for -q. Other-wise Otherwise
wise the value is 0.
The behavior of some combinations of the -k, -p, -q, -u and -z flags is undefined. Presently
-q cancels all the others, -p cancels -u, -k cancels -z, and otherwise -z cancels both -p and
-u.
The -c or -l flags cancel any and all of -kpquz.
readonly
Same as typeset -r.
rehash Same as hash -r.
return [ n ]
Causes a shell function or `.' script to return to the invoking script with the return status
specified by n. If n is omitted, the return status is that of the last command executed.
If return was executed from a trap in a TRAPNAL function, the effect is different for zero and
non-zero return status. With zero status (or after an implicit return at the end of the
trap), the shell will return to whatever it was previously processing; with a non-zero status,
the shell will behave as interrupted except that the return status of the trap is retained.
Note that the numeric value of the signal which caused the trap is passed as the first argu-ment, argument,
ment, so the statement `return $((128+$1))' will return the same status as if the signal had
not been trapped.
sched See the section `The zsh/sched Module' in zshmodules(1).
set [ {+|-}options | {+|-}o [ option_name ] ] ... [ {+|-}A [ name ] ] [ arg ... ]
Set the options for the shell and/or set the positional parameters, or declare and set an
array. If the -s option is given, it causes the specified arguments to be sorted before
assigning them to the positional parameters (or to the array name if -A is used). With +s
sort arguments in descending order. For the meaning of the other flags, see zshoptions(1).
Flags may be specified by name using the -o option. If no option name is supplied with -o, the
current option states are printed: see the description of setopt below for more information
on the format. With +o they are printed in a form that can be used as input to the shell.
If the -A flag is specified, name is set to an array containing the given args; if no name is
specified, all arrays are printed together with their values.
If +A is used and name is an array, the given arguments will replace the initial elements of
that array; if no name is specified, all arrays are printed without their values.
The behaviour of arguments after -A name or +A name depends on whether the option KSH_ARRAYS
is set. If it is not set, all arguments following name are treated as values for the array,
regardless of their form. If the option is set, normal option processing continues at that
point; only regular arguments are treated as values for the array. This means that
set -A array -x -- foo
sets array to `-x -- foo' if KSH_ARRAYS is not set, but sets the array to foo and turns on the
option `-x' if it is set.
If the -A flag is not present, but there are arguments beyond the options, the positional
parameters are set. If the option list (if any) is terminated by `--', and there are no fur-ther further
ther arguments, the positional parameters will be unset.
If no arguments and no `--' are given, then the names and values of all parameters are printed
on the standard output. If the only argument is `+', the names of all parameters are printed.
For historical reasons, `set -' is treated as `set +xv' and `set - args' as `set +xv -- args'
when in any other emulation mode than zsh's native mode.
setcap See the section `The zsh/cap Module' in zshmodules(1).
setopt [ {+|-}options | {+|-}o option_name ] [ name ... ]
Set the options for the shell. All options specified either with flags or by name are set.
If no arguments are supplied, the names of all options currently set are printed. The form is
chosen so as to minimize the differences from the default options for the current emulation
(the default emulation being native zsh, shown as <Z> in zshoptions(1)). Options that are on
by default for the emulation are shown with the prefix no only if they are off, while other
options are shown without the prefix no and only if they are on. In addition to options
changed from the default state by the user, any options activated automatically by the shell
(for example, SHIN_STDIN or INTERACTIVE) will be shown in the list. The format is further
modified by the option KSH_OPTION_PRINT, however the rationale for choosing options with or
without the no prefix remains the same in this case.
If the -m flag is given the arguments are taken as patterns (which should be quoted to protect
them from filename expansion), and all options with names matching these patterns are set.
Note that a bad option name does not cause execution of subsequent shell code to be aborted;
this is behaviour is different from that of `set -o'. This is because set is regarded as a
special builtin by the POSIX standard, but setopt is not.
shift [ n ] [ name ... ]
The positional parameters ${n+1} ... are renamed to $1 ..., where n is an arithmetic expres-sion expression
sion that defaults to 1. If any names are given then the arrays with these names are shifted
instead of the positional parameters.
source file [ arg ... ]
Same as `.', except that the current directory is always searched and is always searched
first, before directories in $path.
stat See the section `The zsh/stat Module' in zshmodules(1).
suspend [ -f ]
Suspend the execution of the shell (send it a SIGTSTP) until it receives a SIGCONT. Unless
the -f option is given, this will refuse to suspend a login shell.
test [ arg ... ]
[ [ arg ... ] ]
Like the system version of test. Added for compatibility; use conditional expressions instead
(see the section `Conditional Expressions'). The main differences between the conditional
expression syntax and the test and [ builtins are: these commands are not handled syntacti-cally, syntactically,
cally, so for example an empty variable expansion may cause an argument to be omitted; syntax
errors cause status 2 to be returned instead of a shell error; and arithmetic operators expect
integer arguments rather than arithmetic expressions.
The command attempts to implement POSIX and its extensions where these are specified. Unfor-tunately Unfortunately
tunately there are intrinsic ambiguities in the syntax; in particular there is no distinction
between test operators and strings that resemble them. The standard attempts to resolve these
for small numbers of arguments (up to four); for five or more arguments compatibility cannot
be relied on. Users are urged wherever possible to use the `[[' test syntax which does not
have these ambiguities.
times Print the accumulated user and system times for the shell and for processes run from the
shell.
trap [ arg ] [ sig ... ]
arg is a series of commands (usually quoted to protect it from immediate evaluation by the
shell) to be read and executed when the shell receives any of the signals specified by one or
more sig args. Each sig can be given as a number, or as the name of a signal either with or
without the string SIG in front (e.g. 1, HUP, and SIGHUP are all the same signal).
If arg is `-', then the specified signals are reset to their defaults, or, if no sig args are
present, all traps are reset.
If arg is an empty string, then the specified signals are ignored by the shell (and by the
commands it invokes).
If arg is omitted but one or more sig args are provided (i.e. the first argument is a valid
signal number or name), the effect is the same as if arg had been specified as `-'.
The trap command with no arguments prints a list of commands associated with each signal.
If sig is ZERR then arg will be executed after each command with a nonzero exit status. ERR
is an alias for ZERR on systems that have no SIGERR signal (this is the usual case).
If sig is DEBUG then arg will be executed before each command if the option DEBUG_BEFORE_CMD
is set (as it is by default), else after each command. Here, a `command' is what is described
as a `sublist' in the shell grammar, see the section SIMPLE COMMANDS & PIPELINES in zsh-misc(1). zshmisc(1).
misc(1). If DEBUG_BEFORE_CMD is set various additional features are available. First, it is
possible to skip the next command by setting the option ERR_EXIT; see the description of the
ERR_EXIT option in zshoptions(1). Also, the shell parameter ZSH_DEBUG_CMD is set to the
string corresponding to the command to be executed following the trap. Note that this string
is reconstructed from the internal format and may not be formatted the same way as the origi-nal original
nal text. The parameter is unset after the trap is executed.
If sig is 0 or EXIT and the trap statement is executed inside the body of a function, then the
command arg is executed after the function completes. The value of $? at the start of execu-tion execution
tion is the exit status of the shell or the return status of the function exiting. If sig is
0 or EXIT and the trap statement is not executed inside the body of a function, then the com-mand command
mand arg is executed when the shell terminates; the trap runs before any zshexit hook func-tions. functions.
tions.
ZERR, DEBUG, and EXIT traps are not executed inside other traps. ZERR and DEBUG traps are
kept within subshells, while other traps are reset.
Note that traps defined with the trap builtin are slightly different from those defined as
`TRAPNAL () { ... }', as the latter have their own function environment (line numbers, local
variables, etc.) while the former use the environment of the command in which they were
called. For example,
trap 'print $LINENO' DEBUG
will print the line number of a command executed after it has run, while
TRAPDEBUG() { print $LINENO; }
will always print the number zero.
Alternative signal names are allowed as described under kill above. Defining a trap under
either name causes any trap under an alternative name to be removed. However, it is recom-mended recommended
mended that for consistency users stick exclusively to one name or another.
true [ arg ... ]
Do nothing and return an exit status of 0.
ttyctl -fu
The -f option freezes the tty, and -u unfreezes it. When the tty is frozen, no changes made
to the tty settings by external programs will be honored by the shell, except for changes in
the size of the screen; the shell will simply reset the settings to their previous values as
soon as each command exits or is suspended. Thus, stty and similar programs have no effect
when the tty is frozen. Without options it reports whether the terminal is frozen or not.
type [ -wfpams ] name ...
Equivalent to whence -v.
typeset [ {+|-}AEFHUafghklprtuxmz ] [ -LRZi [ n ]] [ name[=value] ... ]
typeset -T [ {+|-}Urux ] [ -LRZ [ n ]] SCALAR[=value] array [ sep ]
Set or display attributes and values for shell parameters.
A parameter is created for each name that does not already refer to one. When inside a func-tion, function,
tion, a new parameter is created for every name (even those that already exist), and is unset
again when the function completes. See `Local Parameters' in zshparam(1). The same rules
apply to special shell parameters, which retain their special attributes when made local.
For each name=value assignment, the parameter name is set to value. Note that arrays cur-rently currently
rently cannot be assigned in typeset expressions, only scalars and integers. Unless the
option KSH_TYPESET is set, normal expansion rules apply to assignment arguments, so value may
be split into separate words; if the option is set, assignments which can be recognised when
expansion is performed are treated as single words. For example the command typeset
vbl=$(echo one two) is treated as having one argument if KSH_TYPESET is set, but otherwise is
treated as having the two arguments vbl=one and two.
If the shell option TYPESET_SILENT is not set, for each remaining name that refers to a param-eter parameter
eter that is set, the name and value of the parameter are printed in the form of an assign-ment. assignment.
ment. Nothing is printed for newly-created parameters, or when any attribute flags listed
below are given along with the name. Using `+' instead of minus to introduce an attribute
turns it off.
If the -p option is given, parameters and values are printed in the form of a typeset command
and an assignment (which will be printed separately for arrays and associative arrays),
regardless of other flags and options. Note that the -h flag on parameters is respected; no
value will be shown for these parameters.
If the -T option is given, two or three arguments must be present (an exception is that zero
arguments are allowed to show the list of parameters created in this fashion). The first two
are the name of a scalar and an array parameter (in that order) that will be tied together in
the manner of $PATH and $path. The optional third argument is a single-character separator
which will be used to join the elements of the array to form the scalar; if absent, a colon is
used, as with $PATH. Only the first character of the separator is significant; any remaining
characters are ignored. Only the scalar parameter may be assigned an initial value. Both the
scalar and the array may otherwise be manipulated as normal. If one is unset, the other will
automatically be unset too. There is no way of untying the variables without unsetting them,
or converting the type of one of them with another typeset command; +T does not work, assign-ing assigning
ing an array to SCALAR is an error, and assigning a scalar to array sets it to be a sin-gle-element single-element
gle-element array. Note that both `typeset -xT ...' and `export -T ...' work, but only the
scalar will be marked for export. Setting the value using the scalar version causes a split
on all separators (which cannot be quoted). It is possible to use the same two tied variables
with a different separator character in which case the variables remain joined as before but
the separator is changed. This flag has a different meaning when used with -f; see below.
The -g (global) flag is treated specially: it means that any resulting parameter will not be
restricted to local scope. Note that this does not necessarily mean that the parameter will
be global, as the flag will apply to any existing parameter (even if unset) from an enclosing
function. This flag does not affect the parameter after creation, hence it has no effect when
listing existing parameters, nor does the flag +g have any effect except in combination with
-m (see below).
If no name is present, the names and values of all parameters are printed. In this case the
attribute flags restrict the display to only those parameters that have the specified
attributes, and using `+' rather than `-' to introduce the flag suppresses printing of the
values of parameters when there is no parameter name. Also, if the last option is the word
`+', then names are printed but values are not.
If the -m flag is given the name arguments are taken as patterns (which should be quoted).
With no attribute flags, all parameters (or functions with the -f flag) with matching names
are printed (the shell option TYPESET_SILENT is not used in this case). Note that -m is
ignored if no patterns are given. If the +g flag is combined with -m, a new local parameter
is created for every matching parameter that is not already local. Otherwise -m applies all
other flags or assignments to the existing parameters. Except when assignments are made with
name=value, using +m forces the matching parameters to be printed, even inside a function.
If no attribute flags are given and either no -m flag is present or the +m form was used, each
parameter name printed is preceded by a list of the attributes of that parameter (array, asso-ciation, association,
ciation, exported, integer, readonly). If +m is used with attribute flags, and all those
flags are introduced with +, the matching parameter names are printed but their values are
not.
Attribute flags that transform the final value (-L, -R, -Z, -l, u) are only applied to the
expanded value at the point of a parameter expansion expression using `$'. They are not
applied when a parameter is retrieved internally by the shell for any purpose.
The following attribute flags may be specified:
-A The names refer to associative array parameters; see `Array Parameters' in zshparam(1).
-L Left justify and remove leading blanks from value. If n is nonzero, it defines the
width of the field. If n is zero, the width is determined by the width of the value of
the first assignment. In the case of numeric parameters, the length of the complete
value assigned to the parameter is used to determine the width, not the value that
would be output.
The width is the count of characters, which may be multibyte characters if the MULTI-BYTE MULTIBYTE
BYTE option is in effect. Note that the screen width of the character is not taken
into account; if this is required, use padding with parameter expansion flags
${(ml...)...} as described in `Parameter Expansion Flags' in zshexpn(1).
When the parameter is expanded, it is filled on the right with blanks or truncated if
necessary to fit the field. Note truncation can lead to unexpected results with
numeric parameters. Leading zeros are removed if the -Z flag is also set.
-R Similar to -L, except that right justification is used; when the parameter is expanded,
the field is left filled with blanks or truncated from the end. May not be combined
with the -Z flag.
-U For arrays (but not for associative arrays), keep only the first occurrence of each
duplicated value. This may also be set for colon-separated special parameters like
PATH or FIGNORE, etc. This flag has a different meaning when used with -f; see below.
-Z Specially handled if set along with the -L flag. Otherwise, similar to -R, except that
leading zeros are used for padding instead of blanks if the first non-blank character
is a digit. Numeric parameters are specially handled: they are always eligible for
padding with zeroes, and the zeroes are inserted at an appropriate place in the output.
-a The names refer to array parameters. An array parameter may be created this way, but
it may not be assigned to in the typeset statement. When displaying, both normal and
associative arrays are shown.
-f The names refer to functions rather than parameters. No assignments can be made, and
the only other valid flags are -t, -T, -k, -u, -U and -z. The flag -t turns on execu-tion execution
tion tracing for this function; the flag -T does the same, but turns off tracing on any
function called from the present one, unless that function also has the -t or -T flag.
The -u and -U flags cause the function to be marked for autoloading; -U also causes
alias expansion to be suppressed when the function is loaded. The fpath parameter will
be searched to find the function definition when the function is first referenced; see
the section `Functions'. The -k and -z flags make the function be loaded using
ksh-style or zsh-style autoloading respectively. If neither is given, the setting of
the KSH_AUTOLOAD option determines how the function is loaded.
-h Hide: only useful for special parameters (those marked `<S>' in the table in zsh-param(1)), zshparam(1)),
param(1)), and for local parameters with the same name as a special parameter, though
harmless for others. A special parameter with this attribute will not retain its spe-cial special
cial effect when made local. Thus after `typeset -h PATH', a function containing
`typeset PATH' will create an ordinary local parameter without the usual behaviour of
PATH. Alternatively, the local parameter may itself be given this attribute; hence
inside a function `typeset -h PATH' creates an ordinary local parameter and the special
PATH parameter is not altered in any way. It is also possible to create a local param-eter parameter
eter using `typeset +h special', where the local copy of special will retain its spe-cial special
cial properties regardless of having the -h attribute. Global special parameters
loaded from shell modules (currently those in zsh/mapfile and zsh/parameter) are auto-matically automatically
matically given the -h attribute to avoid name clashes.
-H Hide value: specifies that typeset will not display the value of the parameter when
listing parameters; the display for such parameters is always as if the `+' flag had
been given. Use of the parameter is in other respects normal, and the option does not
apply if the parameter is specified by name, or by pattern with the -m option. This is
on by default for the parameters in the zsh/parameter and zsh/mapfile modules. Note,
however, that unlike the -h flag this is also useful for non-special parameters.
-i Use an internal integer representation. If n is nonzero it defines the output arith-metic arithmetic
metic base, otherwise it is determined by the first assignment. Bases from 2 to 36
inclusive are allowed.
-E Use an internal double-precision floating point representation. On output the variable
will be converted to scientific notation. If n is nonzero it defines the number of
significant figures to display; the default is ten.
-F Use an internal double-precision floating point representation. On output the variable
will be converted to fixed-point decimal notation. If n is nonzero it defines the num-ber number
ber of digits to display after the decimal point; the default is ten.
-l Convert the result to lower case whenever the parameter is expanded. The value is not
converted when assigned.
-r The given names are marked readonly. Note that if name is a special parameter, the
readonly attribute can be turned on, but cannot then be turned off.
-t Tags the named parameters. Tags have no special meaning to the shell. This flag has a
different meaning when used with -f; see above.
-u Convert the result to upper case whenever the parameter is expanded. The value is not
converted when assigned. This flag has a different meaning when used with -f; see
above.
-x Mark for automatic export to the environment of subsequently executed commands. If the
option GLOBAL_EXPORT is set, this implies the option -g, unless +g is also explicitly
given; in other words the parameter is not made local to the enclosing function. This
is for compatibility with previous versions of zsh.
ulimit [ [ -SHacdfilmnpqrstvx | -N resource [ limit ] ... ]
Set or display resource limits of the shell and the processes started by the shell. The value
of limit can be a number in the unit specified below or one of the values `unlimited', which
removes the limit on the resource, or `hard', which uses the current value of the hard limit
on the resource.
By default, only soft limits are manipulated. If the -H flag is given use hard limits instead
of soft limits. If the -S flag is given together with the -H flag set both hard and soft lim-its. limits.
its.
If no options are used, the file size limit (-f) is assumed.
If limit is omitted the current value of the specified resources are printed. When more than
one resource value is printed, the limit name and unit is printed before each value.
When looping over multiple resources, the shell will abort immediately if it detects a badly
formed argument. However, if it fails to set a limit for some other reason it will continue
trying to set the remaining limits.
Not all the following resources are supported on all systems. Running ulimit -a will show
which are supported.
-a Lists all of the current resource limits.
-b Socket buffer size in bytes (N.B. not kilobytes)
-c 512-byte blocks on the size of core dumps.
-d Kilobytes on the size of the data segment.
-f 512-byte blocks on the size of files written.
-i The number of pending signals.
-l Kilobytes on the size of locked-in memory.
-m Kilobytes on the size of physical memory.
-n open file descriptors.
-q Bytes in POSIX message queues.
-s Kilobytes on the size of the stack.
-t CPU seconds to be used.
-r The number of simultaneous threads available to the user.
-u The number of processes available to the user.
-v Kilobytes on the size of virtual memory. On some systems this refers to the limit
called `address space'.
-x The number of locks on files.
A resource may also be specified by integer in the form `-N resource', where resource corre-sponds corresponds
sponds to the integer defined for the resource by the operating system. This may be used to
set the limits for resources known to the shell which do not correspond to option letters.
Such limits will be shown by number in the output of `ulimit -a'.
The number may alternatively be out of the range of limits compiled into the shell. The shell
will try to read or write the limit anyway, and will report an error if this fails.
umask [ -S ] [ mask ]
The umask is set to mask. mask can be either an octal number or a symbolic value as described
in chmod(1). If mask is omitted, the current value is printed. The -S option causes the mask
to be printed as a symbolic value. Otherwise, the mask is printed as an octal number. Note
that in the symbolic form the permissions you specify are those which are to be allowed (not
denied) to the users specified.
unalias
Same as unhash -a.
unfunction
Same as unhash -f.
unhash [ -adfms ] name ...
Remove the element named name from an internal hash table. The default is remove elements
from the command hash table. The -a option causes unhash to remove regular or global aliases;
note when removing a global aliases that the argument must be quoted to prevent it from being
expanded before being passed to the command. The -s option causes unhash to remove suffix
aliases. The -f option causes unhash to remove shell functions. The -d options causes unhash
to remove named directories. If the -m flag is given the arguments are taken as patterns
(should be quoted) and all elements of the corresponding hash table with matching names will
be removed.
unlimit [ -hs ] resource ...
The resource limit for each resource is set to the hard limit. If the -h flag is given and
the shell has appropriate privileges, the hard resource limit for each resource is removed.
The resources of the shell process are only changed if the -s flag is given.
The unlimit command is not made available by default when the shell starts in a mode emulating
another shell. It can be made available with the command `zmodload -F zsh/rlimits b:unlimit'.
unset [ -fmv ] name ...
Each named parameter is unset. Local parameters remain local even if unset; they appear unset
within scope, but the previous value will still reappear when the scope ends.
Individual elements of associative array parameters may be unset by using subscript syntax on
name, which should be quoted (or the entire command prefixed with noglob) to protect the sub-script subscript
script from filename generation.
If the -m flag is specified the arguments are taken as patterns (should be quoted) and all
parameters with matching names are unset. Note that this cannot be used when unsetting asso-ciative associative
ciative array elements, as the subscript will be treated as part of the pattern.
The -v flag specifies that name refers to parameters. This is the default behaviour.
unset -f is equivalent to unfunction.
unsetopt [ {+|-}options | {+|-}o option_name ] [ name ... ]
Unset the options for the shell. All options specified either with flags or by name are
unset. If no arguments are supplied, the names of all options currently unset are printed.
If the -m flag is given the arguments are taken as patterns (which should be quoted to pre-serve preserve
serve them from being interpreted as glob patterns), and all options with names matching these
patterns are unset.
vared See the section `Zle Builtins' in zshzle(1).
wait [ job ... ]
Wait for the specified jobs or processes. If job is not given then all currently active child
processes are waited for. Each job can be either a job specification or the process ID of a
job in the job table. The exit status from this command is that of the job waited for.
whence [ -vcwfpams ] name ...
For each name, indicate how it would be interpreted if used as a command name.
-v Produce a more verbose report.
-c Print the results in a csh-like format. This takes precedence over -v.
-w For each name, print `name: word' where word is one of alias, builtin, command, func-tion, function,
tion, hashed, reserved or none, according as name corresponds to an alias, a built-in
command, an external command, a shell function, a command defined with the hash
builtin, a reserved word, or is not recognised. This takes precedence over -v and -c.
-f Causes the contents of a shell function to be displayed, which would otherwise not hap-pen happen
pen unless the -c flag were used.
-p Do a path search for name even if it is an alias, reserved word, shell function or
builtin.
-a Do a search for all occurrences of name throughout the command path. Normally only the
first occurrence is printed.
-m The arguments are taken as patterns (should be quoted), and the information is dis-played displayed
played for each command matching one of these patterns.
-s If a pathname contains symlinks, print the symlink-free pathname as well.
where [ -wpms ] name ...
Equivalent to whence -ca.
which [ -wpams ] name ...
Equivalent to whence -c.
zcompile [ -U ] [ -z | -k ] [ -R | -M ] file [ name ... ]
zcompile -ca [ -m ] [ -R | -M ] file [ name ... ]
zcompile -t file [ name ... ]
This builtin command can be used to compile functions or scripts, storing the compiled form in
a file, and to examine files containing the compiled form. This allows faster autoloading of
functions and execution of scripts by avoiding parsing of the text when the files are read.
The first form (without the -c, -a or -t options) creates a compiled file. If only the file
argument is given, the output file has the name `file.zwc' and will be placed in the same
directory as the file. The shell will load the compiled file instead of the normal function
file when the function is autoloaded; see the section `Autoloading Functions' in zshmisc(1)
for a description of how autoloaded functions are searched. The extension .zwc stands for
`zsh word code'.
If there is at least one name argument, all the named files are compiled into the output file
given as the first argument. If file does not end in .zwc, this extension is automatically
appended. Files containing multiple compiled functions are called `digest' files, and are
intended to be used as elements of the FPATH/fpath special array.
The second form, with the -c or -a options, writes the compiled definitions for all the named
functions into file. For -c, the names must be functions currently defined in the shell, not
those marked for autoloading. Undefined functions that are marked for autoloading may be
written by using the -a option, in which case the fpath is searched and the contents of the
definition files for those functions, if found, are compiled into file. If both -c and -a are
given, names of both defined functions and functions marked for autoloading may be given. In
either case, the functions in files written with the -c or -a option will be autoloaded as if
the KSH_AUTOLOAD option were unset.
The reason for handling loaded and not-yet-loaded functions with different options is that
some definition files for autoloading define multiple functions, including the function with
the same name as the file, and, at the end, call that function. In such cases the output of
`zcompile -c' does not include the additional functions defined in the file, and any other
initialization code in the file is lost. Using `zcompile -a' captures all this extra informa-tion. information.
tion.
If the -m option is combined with -c or -a, the names are used as patterns and all functions
whose names match one of these patterns will be written. If no name is given, the definitions
of all functions currently defined or marked as autoloaded will be written.
The third form, with the -t option, examines an existing compiled file. Without further argu-ments, arguments,
ments, the names of the original files compiled into it are listed. The first line of output
shows the version of the shell which compiled the file and how the file will be used (i.e. by
reading it directly or by mapping it into memory). With arguments, nothing is output and the
return status is set to zero if definitions for all names were found in the compiled file, and
non-zero if the definition for at least one name was not found.
Other options:
-U Aliases are not expanded when compiling the named files.
-R When the compiled file is read, its contents are copied into the shell's memory, rather
than memory-mapped (see -M). This happens automatically on systems that do not support
memory mapping.
When compiling scripts instead of autoloadable functions, it is often desirable to use
this option; otherwise the whole file, including the code to define functions which
have already been defined, will remain mapped, consequently wasting memory.
-M The compiled file is mapped into the shell's memory when read. This is done in such a
way that multiple instances of the shell running on the same host will share this
mapped file. If neither -R nor -M is given, the zcompile builtin decides what to do
based on the size of the compiled file.
-k
-z These options are used when the compiled file contains functions which are to be
autoloaded. If -z is given, the function will be autoloaded as if the KSH_AUTOLOAD
option is not set, even if it is set at the time the compiled file is read, while if
the -k is given, the function will be loaded as if KSH_AUTOLOAD is set. These options
also take precedence over any -k or -z options specified to the autoload builtin. If
neither of these options is given, the function will be loaded as determined by the
setting of the KSH_AUTOLOAD option at the time the compiled file is read.
These options may also appear as many times as necessary between the listed names to
specify the loading style of all following functions, up to the next -k or -z.
The created file always contains two versions of the compiled format, one for
big-endian machines and one for small-endian machines. The upshot of this is that the
compiled file is machine independent and if it is read or mapped, only one half of the
file is actually used (and mapped).
zformat
See the section `The zsh/zutil Module' in zshmodules(1).
zftp See the section `The zsh/zftp Module' in zshmodules(1).
zle See the section `Zle Builtins' in zshzle(1).
zmodload [ -dL ] [ ... ]
zmodload -F [ -lLme -P param ] module [+-]feature...
zmodload -e [ -A ] [ ... ]
zmodload [ -a [ -bcpf [ -I ] ] ] [ -iL ] ...
zmodload -u [ -abcdpf [ -I ] ] [ -iL ] ...
zmodload -A [ -L ] [ modalias[=module] ... ]
zmodload -R modalias ...
Performs operations relating to zsh's loadable modules. Loading of modules while the shell is
running (`dynamical loading') is not available on all operating systems, or on all installa-tions installations
tions on a particular operating system, although the zmodload command itself is always avail-able available
able and can be used to manipulate modules built into versions of the shell executable without
dynamical loading.
Without arguments the names of all currently loaded binary modules are printed. The -L option
causes this list to be in the form of a series of zmodload commands. Forms with arguments
are:
zmodload [ -i ] name ...
zmodload -u [ -i ] name ...
In the simplest case, zmodload loads a binary module. The module must be in a file
with a name consisting of the specified name followed by a standard suffix, usually
`.so' (`.sl' on HPUX). If the module to be loaded is already loaded the duplicate mod-ule module
ule is ignored. If zmodload detects an inconsistency, such as an invalid module name
or circular dependency list, the current code block is aborted. Hence `zmodload mod-ule module
ule 2>/dev/null' is sufficient to test whether a module is available. If it is avail-able, available,
able, the module is loaded if necessary, while if it is not available, non-zero status
is silently returned. The option -i is accepted for compatibility but has no effect.
The named module is searched for in the same way a command is, using $module_path
instead of $path. However, the path search is performed even when the module name con-tains contains
tains a `/', which it usually does. There is no way to prevent the path search.
If the module supports features (see below), zmodload tries to enable all features when
loading a module. If the module was successfully loaded but not all features could be
enabled, zmodload returns status 2.
With -u, zmodload unloads modules. The same name must be given that was given when the
module was loaded, but it is not necessary for the module to exist in the file system.
The -i option suppresses the error if the module is already unloaded (or was never
loaded).
Each module has a boot and a cleanup function. The module will not be loaded if its
boot function fails. Similarly a module can only be unloaded if its cleanup function
runs successfully.
zmodload -F [ -almLe -P param ] module [+-]feature...
zmodload -F allows more selective control over the features provided by modules. With
no options apart from -F, the module named module is loaded, if it was not already
loaded, and the list of features is set to the required state. If no features are
specified, the module is loaded, if it was not already loaded, but the state of fea-tures features
tures is unchanged. Each feature may be preceded by a + to turn the feature on, or -to orto
to turn it off; the + is assumed if neither character is present. Any feature not
explicitly mentioned is left in its current state; if the module was not previously
loaded this means any such features will remain disabled. The return status is zero if
all features were set, 1 if the module failed to load, and 2 if some features could not
be set (for example, a parameter couldn't be added because there was a different param-eter parameter
eter of the same name) but the module was loaded.
The standard features are builtins, conditions, parameters and math functions; these
are indicated by the prefix `b:', `c:' (`C:' for an infix condition), `p:' and `f:',
respectively, followed by the name that the corresponding feature would have in the
shell. For example, `b:strftime' indicates a builtin named strftime and p:EPOCHSECONDS
indicates a parameter named EPOCHSECONDS. The module may provide other (`abstract')
features of its own as indicated by its documentation; these have no prefix.
With -l or -L, features provided by the module are listed. With -l alone, a list of
features together with their states is shown, one feature per line. With -L alone, a
zmodload -F command that would cause enabled features of the module to be turned on is
shown. With -lL, a zmodload -F command that would cause all the features to be set to
their current state is shown. If one of these combinations is given the option -P
param then the parameter param is set to an array of features, either features together
with their state or (if -L alone is given) enabled features.
With the option -L the module name may be omitted; then a list of all enabled features
for all modules providing features is printed in the form of zmodload -F commands. If
-l is also given, the state of both enabled and disabled features is output in that
form.
A set of features may be provided together with -l or -L and a module name; in that
case only the state of those features is considered. Each feature may be preceded by +
or - but the character has no effect. If no set of features is provided, all features
are considered.
With -e, the command first tests that the module is loaded; if it is not, status 1 is
returned. If the module is loaded, the list of features given as an argument is exam-ined. examined.
ined. Any feature given with no prefix is simply tested to see if the module provides
it; any feature given with a prefix + or - is tested to see if is provided and in the
given state. If the tests on all features in the list succeed, status 0 is returned,
else status 1.
With -m, each entry in the given list of features is taken as a pattern to be matched
against the list of features provided by the module. An initial + or - must be given
explicitly. This may not be combined with the -a option as autoloads must be specified
explicitly.
With -a, the given list of features is marked for autoload from the specified module,
which may not yet be loaded. An optional + may appear before the feature name. If the
feature is prefixed with -, any existing autoload is removed. The options -l and -L
may be used to list autoloads. Autoloading is specific to individual features; when
the module is loaded only the requested feature is enabled. Autoload requests are pre-served preserved
served if the module is subsequently unloaded until an explicit `zmodload -Fa module
-feature' is issued. It is not an error to request an autoload for a feature of a mod-ule module
ule that is already loaded.
When the module is loaded each autoload is checked against the features actually pro-vided provided
vided by the module; if the feature is not provided the autoload request is deleted. A
warning message is output; if the module is being loaded to provide a different fea-ture, feature,
ture, and that autoload is successful, there is no effect on the status of the current
command. If the module is already loaded at the time when zmodload -Fa is run, an
error message is printed and status 1 returned.
zmodload -Fa can be used with the -l, -L, -e and -P options for listing and testing the
existence of autoloadable features. In this case -l is ignored if -L is specified.
zmodload -FaL with no module name lists autoloads for all modules.
Note that only standard features as described above can be autoloaded; other features
require the module to be loaded before enabling.
zmodload -d [ -L ] [ name ]
zmodload -d name dep ...
zmodload -ud name [ dep ... ]
The -d option can be used to specify module dependencies. The modules named in the
second and subsequent arguments will be loaded before the module named in the first
argument.
With -d and one argument, all dependencies for that module are listed. With -d and no
arguments, all module dependencies are listed. This listing is by default in a Make-file-like Makefile-like
file-like format. The -L option changes this format to a list of zmodload -d commands.
If -d and -u are both used, dependencies are removed. If only one argument is given,
all dependencies for that module are removed.
zmodload -ab [ -L ]
zmodload -ab [ -i ] name [ builtin ... ]
zmodload -ub [ -i ] builtin ...
The -ab option defines autoloaded builtins. It defines the specified builtins. When
any of those builtins is called, the module specified in the first argument is loaded
and all its features are enabled (for selective control of features use `zmodload -F
-a' as described above). If only the name is given, one builtin is defined, with the
same name as the module. -i suppresses the error if the builtin is already defined or
autoloaded, but not if another builtin of the same name is already defined.
With -ab and no arguments, all autoloaded builtins are listed, with the module name (if
different) shown in parentheses after the builtin name. The -L option changes this
format to a list of zmodload -a commands.
If -b is used together with the -u option, it removes builtins previously defined with
-ab. This is only possible if the builtin is not yet loaded. -i suppresses the error
if the builtin is already removed (or never existed).
Autoload requests are retained if the module is subsequently unloaded until an explicit
`zmodload -ub builtin' is issued.
zmodload -ac [ -IL ]
zmodload -ac [ -iI ] name [ cond ... ]
zmodload -uc [ -iI ] cond ...
The -ac option is used to define autoloaded condition codes. The cond strings give the
names of the conditions defined by the module. The optional -I option is used to define
infix condition names. Without this option prefix condition names are defined.
If given no condition names, all defined names are listed (as a series of zmodload com-mands commands
mands if the -L option is given).
The -uc option removes definitions for autoloaded conditions.
zmodload -ap [ -L ]
zmodload -ap [ -i ] name [ parameter ... ]
zmodload -up [ -i ] parameter ...
The -p option is like the -b and -c options, but makes zmodload work on autoloaded
parameters instead.
zmodload -af [ -L ]
zmodload -af [ -i ] name [ function ... ]
zmodload -uf [ -i ] function ...
The -f option is like the -b, -p, and -c options, but makes zmodload work on autoloaded
math functions instead.
zmodload -a [ -L ]
zmodload -a [ -i ] name [ builtin ... ]
zmodload -ua [ -i ] builtin ...
Equivalent to -ab and -ub.
zmodload -e [ -A ] [ string ... ]
The -e option without arguments lists all loaded modules; if the -A option is also
given, module aliases corresponding to loaded modules are also shown. If arguments are
provided, nothing is printed; the return status is set to zero if all strings given as
arguments are names of loaded modules and to one if at least on string is not the name
of a loaded module. This can be used to test for the availability of things imple-mented implemented
mented by modules. In this case, any aliases are automatically resolved and the -A
flag is not used.
zmodload -A [ -L ] [ modalias[=module] ... ]
For each argument, if both modalias and module are given, define modalias to be an
alias for the module module. If the module modalias is ever subsequently requested,
either via a call to zmodload or implicitly, the shell will attempt to load module
instead. If module is not given, show the definition of modalias. If no arguments are
given, list all defined module aliases. When listing, if the -L flag was also given,
list the definition as a zmodload command to recreate the alias.
The existence of aliases for modules is completely independent of whether the name
resolved is actually loaded as a module: while the alias exists, loading and unloading
the module under any alias has exactly the same effect as using the resolved name, and
does not affect the connection between the alias and the resolved name which can be
removed either by zmodload -R or by redefining the alias. Chains of aliases (i.e.
where the first resolved name is itself an alias) are valid so long as these are not
circular. As the aliases take the same format as module names, they may include path
separators: in this case, there is no requirement for any part of the path named to
exist as the alias will be resolved first. For example, `any/old/alias' is always a
valid alias.
Dependencies added to aliased modules are actually added to the resolved module; these
remain if the alias is removed. It is valid to create an alias whose name is one of
the standard shell modules and which resolves to a different module. However, if a
module has dependencies, it will not be possible to use the module name as an alias as
the module will already be marked as a loadable module in its own right.
Apart from the above, aliases can be used in the zmodload command anywhere module names
are required. However, aliases will not be shown in lists of loaded modules with a
bare `zmodload'.
zmodload -R modalias ...
For each modalias argument that was previously defined as a module alias via zmodload
-A, delete the alias. If any was not defined, an error is caused and the remainder of
the line is ignored.
Note that zsh makes no distinction between modules that were linked into the shell and modules
that are loaded dynamically. In both cases this builtin command has to be used to make avail-able available
able the builtins and other things defined by modules (unless the module is autoloaded on
these definitions). This is true even for systems that don't support dynamic loading of mod-ules. modules.
ules.
zparseopts
See the section `The zsh/zutil Module' in zshmodules(1).
zprof See the section `The zsh/zprof Module' in zshmodules(1).
zpty See the section `The zsh/zpty Module' in zshmodules(1).
zregexparse
See the section `The zsh/zutil Module' in zshmodules(1).
zsocket
See the section `The zsh/net/socket Module' in zshmodules(1).
zstyle See the section `The zsh/zutil Module' in zshmodules(1).
ztcp See the section `The zsh/net/tcp Module' in zshmodules(1).
zsh 5.0.2 December 21, 2012 ZSHBUILTINS(1)
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