Source Code 1994 March/Source_Code_CD-ROM_Walnut_Creek_March_1994.iso/compsrcs/misc/volume35/zsh/part03

Text File | 1993-02-19 | 55.6 KB | 2,439 lines

Newsgroups: comp.sources.misc
From: [e-mail] (The Zsh Mailing List)
Subject: v35i053:  zsh - The Z Shell, version 2.3.1, Part03/22
Message-ID: <[e-mail]>
X-Md4-Signature: cbf11e1334e0785c3220a1644257cb50
Date: Sat, 20 Feb 1993 21:20:32 GMT
Approved: [e-mail]

Submitted-by: [e-mail] (The Zsh Mailing List)
Posting-number: Volume 35, Issue 53
Archive-name: zsh/part03
Environment: UNIX
Supersedes: zsh2.2: Volume 29, Issue 97-113

#! /bin/sh
# This is a shell archive.  Remove anything before this line, then feed it
# into a shell via "sh file" or similar.  To overwrite existing files,
# type "sh file -c".
# The tool that generated this appeared in the comp.sources.unix newsgroup;
# send mail to [e-mail] if you want that tool.
# Contents:  doc/intro.txt.01 help/autoload src/Makefile.sample
# Wrapped by mattson@odin on Sat Feb  6 14:41:51 1993
PATH=/bin:/usr/bin:/usr/ucb ; export PATH
echo If this archive is complete, you will see the following message:
echo '          "shar: End of archive 3 (of 22)."'
if test -f 'doc/intro.txt.01' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'doc/intro.txt.01'\"
else
  echo shar: Extracting \"'doc/intro.txt.01'\" \(49646 characters\)
  sed "s/^X//" >'doc/intro.txt.01' <<'END_OF_FILE'
X
X
X
X
X
X
X               An Introduction to the Z Shell
X
X
X                        Paul Falstad
X                       [e-mail]
X
X
X
X
X
X
Xzsh is a shell designed for interactive use, although it  is
Xalso  a  powerful  scripting  language.   Many of the useful
Xfeatures of bash, ksh, and tcsh were incorporated into  zsh;
Xmany  original  features  were added.  This document details
Xsome of the  unique  features  of  zsh.   It  assumes  basic
Xknowledge of the standard UNIX shells; the intent is to show
Xa reader already familiar with one of the other major shells
Xwhat  makes zsh more useful or more powerful.  This document
Xis not at all comprehensive; read the  manual  entry  for  a
Xdescription  of  the  shell  that  is  complete and concise,
Xalthough somewhat overwhelming and devoid of examples.
X
XFilename Generation
X
XOtherwise known as globbing, filename  generation  is  quite
Xextensive in zsh.  Of course, it has all the basics:
X
X% ls
XMakefile   file.pro   foo.o      main.o     q.c        run234     stuff
Xbar.o      foo        link       morestuff  run123     run240     sub
Xfile.h     foo.c      main.h     pipe       run2       run303
X% ls *.c
Xfoo.c  q.c
X% ls *.[co]
Xbar.o   foo.c   foo.o   main.o  q.c
X% ls foo.?
Xfoo.c  foo.o
X% ls *.[^c]
Xbar.o   file.h  foo.o   main.h  main.o
X% ls *.[^oh]
Xfoo.c  q.c
X
X
XAlso, if the EXTENDEDGLOB option is set, some  new  features
Xare  activated.   For  example,  the ^ character negates the
Xpattern following it:
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X                           - 2 -
X
X% setopt extendedglob
X% ls -d ^*.c
XMakefile   file.pro   link       morestuff  run2       run303
Xbar.o      foo        main.h     pipe       run234     stuff
Xfile.h     foo.o      main.o     run123     run240     sub
X% ls -d ^*.*
XMakefile   link       pipe       run2       run240     stuff
Xfoo        morestuff  run123     run234     run303     sub
X% ls -d ^Makefile
Xbar.o      foo        link       morestuff  run123     run240     sub
Xfile.h     foo.c      main.h     pipe       run2       run303
Xfile.pro   foo.o      main.o     q.c        run234     stuff
X% ls -d *.^c
X.rhosts   bar.o     file.h    file.pro  foo.o     main.h    main.o
X
X
XAn expression of the form <x-y> matches a range of integers:
X
X% ls run<200-300>
Xrun234  run240
X% ls run<300-400>
Xrun303
X% ls run<-200>
Xrun123  run2
X% ls run<300->
Xrun303
X% ls run<>
Xrun123  run2    run234  run240  run303
X
X
XGrouping is possible:
X
X% ls (foo|bar).*
Xbar.o  foo.c  foo.o
X% ls *.(c|o|pro)
Xbar.o     file.pro  foo.c     foo.o     main.o    q.c
X
X
XAlso, the string **/ forces a  recursive  search  of  sub-
Xdirectories:
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X                           - 3 -
X
X% ls -R
XMakefile   file.pro   foo.o      main.o     q.c        run234     stuff
Xbar.o      foo        link       morestuff  run123     run240     sub
Xfile.h     foo.c      main.h     pipe       run2       run303
X
Xmorestuff:
X
Xstuff:
Xfile  xxx   yyy
X
Xstuff/xxx:
Xfoobar
X
Xstuff/yyy:
Xfrobar
X% ls **/*bar
Xstuff/xxx/foobar  stuff/yyy/frobar
X% ls **/f*
Xfile.h            foo               foo.o             stuff/xxx/foobar
Xfile.pro          foo.c             stuff/file        stuff/yyy/frobar
X% ls *bar*
Xbar.o
X% ls **/*bar*
Xbar.o             stuff/xxx/foobar  stuff/yyy/frobar
X% ls stuff/**/*bar*
Xstuff/xxx/foobar  stuff/yyy/frobar
X
X
X
XIt is possible to exclude certain files  from  the  patterns
Xusing  the  ~  character.   A  pattern of the form *.c~bar.c
Xlists all files matching *.c, except for the file bar.c.
X
X% ls *.c
Xfoo.c    foob.c    bar.c
X% ls *.c~bar.c
Xfoo.c    foob.c
X% ls *.c~f*
Xbar.c
X
X
X
XOne can add a number of qualifiers to  the  end  of  any  of
Xthese  patterns,  to restrict matches to certain file types.
XA qualified pattern is of the form
X
X        pattern(...)
X
X
Xwith single-letter qualifiers inside the parentheses.
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X                           - 4 -
X
X% alias l='ls -dF'
X% l *
XMakefile    foo*        main.h      q.c         run240
Xbar.o       foo.c       main.o      run123      run303
Xfile.h      foo.o       morestuff/  run2        stuff/
Xfile.pro    link@       pipe        run234      sub
X% l *(/)
Xmorestuff/  stuff/
X% l *(@)
Xlink@
X% l *(*)
Xfoo*        link@       morestuff/  stuff/
X% l *(x)
Xfoo*        link@       morestuff/  stuff/
X% l *(X)
Xfoo*        link@       morestuff/  stuff/
X% l *(R)
Xbar.o       foo*        link@       morestuff/  run123      run240
Xfile.h      foo.c       main.h      pipe        run2        run303
Xfile.pro    foo.o       main.o      q.c         run234      stuff/
X
X
XNote that  *(x)  and  *(*)  both  match  executables.   *(X)
Xmatches  files  executable  by  others,  as opposed to *(x),
Xwhich matches files executable by the owner.  *(R) and  *(r)
Xmatch  readable files; *(W) and *(w), which checks for writ-
Xable files.  *(W) is especially important, since  it  checks
Xfor world-writable files:
X
X% l *(w)
Xbar.o       foo*        link@       morestuff/  run123      run240
Xfile.h      foo.c       main.h      pipe        run2        run303
Xfile.pro    foo.o       main.o      q.c         run234      stuff/
X% l *(W)
Xlink@   run240
X% l -l link run240
Xlrwxrwxrwx  1 pfalstad       10 May 23 18:12 link -> /bin/false*
X-rw-rw-rw-  1 pfalstad        0 May 23 18:12 run240
X
X
XYou can filter out the symbolic links with the ^ character:
X
X% l *(W^@)
Xrun240
X% l *(x)
Xfoo*        link@       morestuff/  stuff/
X% l *(x^@/)
Xfoo*
X
X
XTo find all plain files, you can use .:
X
X
X
X
X
X
X
X
X
X
X
X
X
X                           - 5 -
X
X% l *(.)
XMakefile  file.h    foo*      foo.o     main.o    run123    run234    run303
Xbar.o     file.pro  foo.c     main.h    q.c       run2      run240    sub
X% l *(^.)
Xlink@       morestuff/  pipe        stuff/
X% l s*(.)
Xstuff/   sub
X% l *(p)
Xpipe
X% l -l *(p)
Xprw-r--r--  1 pfalstad        0 May 23 18:12 pipe
X
X
X*(U) matches all files owned by  you.   To  search  for  all
Xfiles not owned by you, use *(^U):
X
X% l -l *(^U)
X-rw-------  1 subbarao       29 May 23 18:13 sub
X
X
XThis searches for setuid files:
X
X% l -l *(s)
X-rwsr-xr-x  1 pfalstad       16 May 23 18:12 foo*
X
X
XThis checks for a certain user's files:
X
X% ypmatch subbarao passwd
Xsubbarao:*:3338:35:Kartik Subbarao:/u/subbarao:/usr/princeton/bin/zsh
X% l -l *(u3338)
X-rw-------  1 subbarao       29 May 23 18:13 sub
X
X
X
XStartup Files
X
XThere are five startup files that  zsh  will  read  commands
Xfrom:
X
X$ZDOTDIR/.zshenv
X$ZDOTDIR/.zprofile
X$ZDOTDIR/.zshrc
X$ZDOTDIR/.zlogin
X$ZDOTDIR/.zlogout
X
X
XIf ZDOTDIR is not set, then the value of HOME is used;  this
Xis the usual case.
X
X.zshenv is sourced on all invocations of the  shell,  unless
Xthe -f option is set.  It should contain commands to set the
Xcommand search path, plus other important environment  vari-
Xables.   .zshenv  should  not  contain commands that produce
Xoutput or assume the shell is attached to a tty.
X
X.zshrc is sourced in interactive shells.  It should  contain
Xcommands  to  set  up aliases, functions, options, key bind-
Xings, etc.
X
X
X
X
X
X                           - 6 -
X.zlogin is sourced in login shells.  It should contain  com-
Xmands  that  should be executed only in login shells.  .zlo-
Xgout is sourced when login shells exit.  .zprofile is  simi-
Xlar  to  .zlogin,  except  that it is sourced before .zshrc.
X.zprofile is meant as an  alternative  to  .zlogin  for  ksh
Xfans; the two are not intended to be used together, although
Xthis could certainly be done if desired.  .zlogin is not the
Xplace  for  alias definitions, options, environment variable
Xsettings, etc.; as a general rule, it should not change  the
Xshell  environment at all.  Rather, it should be used to set
Xthe terminal type and run  a  series  of  external  commands
X(fortune, msgs, etc).
X
XShell Functions
X
Xzsh also allows you to create your own commands by  defining
Xshell functions.  For example:
X
X% yp () {
X>       ypmatch $1 passwd.byname
X> }
X% yp pfalstad
Xpfalstad:*:3564:35:Paul John Falstad:/u/pfalstad:/usr/princeton/bin/zsh
X
X
XThis function looks up a user in the NIS password map.   The
X$1  expands to the first argument to yp.  The function could
Xhave been equivalently defined in one of the following ways:
X
X% function yp {
X>       ypmatch $1 passwd.byname
X> }
X% function yp () {
X>       ypmatch $1 passwd.byname
X> }
X% function yp () ypmatch $1 passwd.byname
X
X
XNote that aliases are expanded when the function  definition
Xis parsed, not when the function is executed.  For example:
X
X% alias ypmatch=echo
X% yp pfalstad
Xpfalstad:*:3564:35:Paul John Falstad:/u/pfalstad:/usr/princeton/bin/zsh
X
X
XSince the alias was defined after the function  was  parsed,
Xit  has  no effect on the function's execution.  However, if
Xwe define the function again with the alias in place:
X
X% function yp () { ypmatch $1 passwd.byname }
X% yp pfalstad
Xpfalstad passwd.byname
X
X
Xit is parsed with the new alias definition in place.  There-
Xfore, in general you must define aliases before functions.
X
XWe can make the function take multiple arguments:
X
X
X
X
X
X
X                           - 7 -
X
X% unalias ypmatch
X% yp () {
X>       for i
X>       do ypmatch $i passwd.byname
X>       done
X> }
X% yp pfalstad subbarao sukthnkr
Xpfalstad:*:3564:35:Paul John Falstad:/u/pfalstad:/usr/princeton/bin/zsh
Xsubbarao:*:3338:35:Kartik Subbarao:/u/subbarao:/usr/princeton/bin/zsh
Xsukthnkr:*:1267:35:Rahul Sukthankar:/u/sukthnkr:/usr/princeton/bin/tcsh
X
X
XThe for i loops through each of  the  function's  arguments,
Xsetting  i  equal to each of them in turn.  We can also make
Xthe function do  something  sensible  if  no  arguments  are
Xgiven:
X
X% yp () {
X>       if (( $# == 0 ))
X>       then echo usage: yp name ...; fi
X>       for i; do ypmatch $i passwd.byname; done
X> }
X% yp
Xusage: yp name ...
X% yp pfalstad sukthnkr
Xpfalstad:*:3564:35:Paul John Falstad:/u/pfalstad:/usr/princeton/bin/zsh
Xsukthnkr:*:1267:35:Rahul Sukthankar:/u/sukthnkr:/usr/princeton/bin/tcsh
X
X
X$# is the number of arguments supplied to the function.   If
Xit is equal to zero, we print a usage message; otherwise, we
Xloop through the arguments, and ypmatch all of them.
X
XHere's a function that selects a random line from a file:
X
X% randline () {
X>       integer z=$(wc -l <$1)
X>       sed -n $[RANDOM % z + 1]p $1
X> }
X% randline /etc/motd
XPHOENIX WILL BE DOWN briefly Friday morning, 5/24/91 from 8 AM to
X% randline /etc/motd
XSunOS Release 4.1.1 (PHOENIX) #19: Tue May 14 19:03:15 EDT 1991
X% randline /etc/motd
X| Please use the "msgs" command to read announcements.  Refer to the   |
X% echo $z
X
X%
X
X
Xrandline has a local variable, z, that holds the  number  of
Xlines  in  the  file.  $[RANDOM % z + 1] expands to a random
Xnumber between 1 and z.  An expression of  the  form  $[...]
Xexpands to the value of the arithmetic expression within the
Xbrackets, and the RANDOM variable returns  a  random  number
Xeach  time  it is referenced.  % is the modulus operator, as
Xin C.  Therefore, sed -n $[RANDOM%z+1]p picks a random  line
Xfrom its input, from 1 to z.
X
X
X
X
X
X
X                           - 8 -
XFunction definitions can be viewed with the functions  buil-
Xtin:
X
X% functions randline
Xrandline () {
X        integer z=$(wc -l <$1)
X        sed -n $[RANDOM % z + 1]p $1
X
X}
X% functions
Xyp () {
X        if let $# == 0
X
X        then
X                echo usage: yp name ...
X
X        fi
X        for i
X        do
X                ypmatch $i passwd.byname
X
X                done
X
X}
Xrandline () {
X        integer z=$(wc -l <$1)
X        sed -n $[RANDOM % z + 1]p $1
X
X}
X
X
XHere's another one:
X
X% cx () { chmod +x $* }
X% ls -l foo bar
X-rw-r--r--  1 pfalstad       29 May 24 04:38 bar
X-rw-r--r--  1 pfalstad       29 May 24 04:38 foo
X% cx foo bar
X% ls -l foo bar
X-rwxr-xr-x  1 pfalstad       29 May 24 04:38 bar
X-rwxr-xr-x  1 pfalstad       29 May 24 04:38 foo
X
X
XNote that this could also have been implemented as an alias:
X
X% chmod 644 foo bar
X% alias cx='chmod +x'
X% cx foo bar
X% ls -l foo bar
X-rwxr-xr-x  1 pfalstad       29 May 24 04:38 bar
X-rwxr-xr-x  1 pfalstad       29 May 24 04:38 foo
X
X
X
XInstead of defining a lot of functions in your  .zshrc,  all
Xof  which  you  may  not  use, it is often better to use the
Xautoload builtin.  The idea is, you create a directory where
Xfunction  definitions  are stored, declare the names in your
X.zshrc, and tell the shell where to look for them.  Whenever
Xyou  reference a function, the shell will automatically load
X
X
X
X
X
X                           - 9 -
Xit into memory.
X
X% mkdir /tmp/funs
X% cat >/tmp/funs/yp
Xypmatch $1 passwd.byname
X^D
X% cat >/tmp/funs/cx
Xchmod +x $*
X^D
X% FPATH=/tmp/funs
X% autoload cx yp
X% functions cx yp
Xundefined cx ()
Xundefined yp ()
X% chmod 755 /tmp/funs/{cx,yp}
X% yp egsirer
Xegsirer:*:3214:35:Emin Gun Sirer:/u/egsirer:/bin/sh
X% functions yp
Xyp () {
X        ypmatch $1 passwd.byname
X}
X
X
XThis idea has other benefits.  By adding a #! header to  the
Xfiles, you can make them double as shell scripts.  (Although
Xit is faster to use them as functions, since a separate pro-
Xcess is not created.)
X
X% ed /tmp/funs/yp
X25
Xi
X#! /usr/local/bin/zsh
Xw
X42
Xq
X% </tmp/funs/yp
X#! /usr/local/bin/zsh
Xypmatch $1 passwd.byname
X% /tmp/funs/yp sukthnkr
Xsukthnkr:*:1267:35:Rahul Sukthankar:/u/sukthnkr:/usr/princeton/bin/tcsh
X
X
XNow other people, who may not use zsh, or who don't want  to
Xcopy  all  of  your .zshrc, may use these functions as shell
Xscripts.
X
XDirectories
X
XOne nice feature of zsh is the way  it  prints  directories.
XFor example, if we set the prompt like this:
X
Xphoenix% PROMPT='%~> '
X~> cd src
X~/src>
X
X
Xthe shell will print the current directory  in  the  prompt,
Xusing  the  ~  character.  However, zsh is smarter than most
Xother shells in this respect:
X
X
X
X
X
X
X                           - 10 -
X
X~/src> cd ~subbarao
X~subbarao> cd ~maruchck
X~maruchck> cd lib
X~maruchck/lib> cd fun
X~maruchck/lib/fun> foo=/usr/princeton/common/src
X~maruchck/lib/fun> cd ~foo
X~foo> cd ..
X/usr/princeton/common> cd src
X~foo> cd news/nntp
X~foo/news/nntp> cd inews
X~foo/news/nntp/inews>
X
X
XNote that zsh prints other users' directories  in  the  form
X~user.  Also note that you can set a parameter and use it as
Xa directory name; zsh will act as if foo is a user with  the
Xlogin  directory  /usr/princeton/common/src.   This  is con-
Xvenient, especially if you're sick of  seeing  prompts  like
Xthis:
X
Xphoenix:/usr/princeton/common/src/X.V11R4/contrib/clients/xv/docs>
X
X
XIf you get stuck in this position, you can give the  current
Xdirectory a short name, like this:
X
X/usr/princeton/common/src/news/nntp/inews> inews=$PWD
X/usr/princeton/common/src/news/nntp/inews> echo ~inews
X/usr/princeton/common/src/news/nntp/inews
X~inews>
X
X
XWhen you reference a directory in the form ~inews, the shell
Xassumes  that you want the directory displayed in this form;
Xthus simply typing echo  ~inews  or  cd  ~inews  causes  the
Xprompt to be shortened.  You can define a shell function for
Xthis purpose:
X
X~inews> namedir () { $1=$PWD ;  : ~$1 }
X~inews> cd /usr/princeton/bin
X/usr/princeton/bin> namedir pbin
X~pbin> cd /var/spool/mail
X/var/spool/mail> namedir spool
X~spool> cd .msgs
X~spool/.msgs>
X
X
XYou may want to add this one-line function to your .zshrc.
X
Xzsh can also put the current directory in your title bar, if
Xyou  are  using  a  windowing system.  One way to do this is
Xwith the chpwd function, which is automatically executed  by
Xthe  shell  whenever you change directory.  If you are using
Xxterm, this will work:
X
Xchpwd () { print -Pn '^[]2;%~^G' }
X
X
XThe -P option tells print to  treat  its  arguments  like  a
X
X
X
X
X
X                           - 11 -
Xprompt  string; otherwise the %~ would not be expanded.  The
X-n option suppresses the terminating newline, as with echo.
X
XIf you are using an IRIS wsh, do this:
X
Xchpwd () { print -Pn '^[P1.y%~^[' }
X
X
XThe print -D command has other uses.  For example, to  print
Xthe  current directory to standard output in short form, you
Xcan do this:
X
X% print -D $PWD
X~subbarao/src
X
X
Xand to print each component of the path in short form:
X
X% print -D $path
X/bin /usr/bin ~locbin ~locbin/X11 ~/bin
X
X
X
XDirectory Stacks
X
XIf you use csh, you may know about  directory  stacks.   The
Xpushd  command  puts the current directory on the stack, and
Xchanges to a new directory; the popd command pops  a  direc-
Xtory off the stack and changes to it.
X
Xphoenix% cd
Xphoenix% PROMPT='Z %~> '
XZ ~> pushd /tmp
X/tmp ~
XZ /tmp> pushd /usr/etc
X/usr/etc /tmp ~
XZ /usr/etc> pushd /usr/bin
X/usr/bin /usr/etc /tmp ~
XZ /usr/bin> popd
X/usr/etc /tmp ~
XZ /usr/etc> popd
X/tmp ~
XZ /tmp> pushd /etc
X/etc /tmp ~
XZ /etc> popd
X/tmp ~
X
X
Xzsh's directory stack commands work similarly.  One  differ-
Xence  is the way pushd is handled if no arguments are given.
XAs in csh, this exchanges the top two elements of the direc-
Xtory stack:
X
XZ /tmp> dirs
X/tmp ~
XZ /tmp> pushd
X~ /tmp
X
X
Xunless the stack only has one entry:
X
X
X
X
X
X                           - 12 -
X
XZ ~> popd
X/tmp
XZ /tmp> dirs
X/tmp
XZ /tmp> pushd
X~ /tmp
X
X
Xor unless the PUSHDTOHOME option is set:
X
XZ ~> setopt pushdtohome
XZ ~> pushd
X~ ~ /tmp
X
X
X
XAs an alternative to using directory stacks in this  manner,
Xwe  can  get something like a directory history by setting a
Xfew more options and parameters:
X
X~> DIRSTACKSIZE=8
X~> setopt autopushd pushdminus pushdsilent pushdtohome
X~> alias dh='dirs -v'
X~> cd /tmp
X/tmp> cd /usr
X/usr> cd bin
X/usr/bin> cd ../pub
X/usr/pub> dh
X0       /usr/pub
X1       /usr/bin
X2       /usr
X3       /tmp
X4       ~
X/usr/pub> cd -3
X/tmp> dh
X0       /tmp
X1       /usr/pub
X2       /usr/bin
X3       /usr
X4       ~
X/tmp> ls =2/df
X/usr/bin/df
X/tmp> cd -4
X~>
X
X
XNote that =2 expanded to the second directory in the history
Xlist,  and  that  cd  -3 recalled the third directory in the
Xlist.
X
XYou may be wondering what all those options  do.   AUTOPUSHD
Xmade  cd act like pushd.  (alias cd=pushd is not sufficient,
Xfor various reasons.) PUSHDMINUS swapped the meaning  of  cd
X+1 and cd -1; we want them to mean the opposite of what they
Xmean in csh, because it makes more sense in this scheme, and
Xit's easier to type:
X
X
X
X
X
X
X
X
X                           - 13 -
X
X~> dh
X0       ~
X1       /tmp
X2       /usr/pub
X3       /usr/bin
X4       /usr
X~> unsetopt pushdminus
X~> cd +1
X/tmp> dh
X0       /tmp
X1       ~
X2       /usr/pub
X3       /usr/bin
X4       /usr
X/tmp> cd +2
X/usr/pub>
X
X
XPUSHDSILENT keeps the  shell  from  printing  the  directory
Xstack  each  time  we  do a cd, and PUSHDTOHOME we mentioned
Xearlier:
X
X/usr/pub> unsetopt pushdsilent
X/usr/pub> cd /etc
X/etc /usr/pub /tmp ~ /usr/bin /usr
X/etc> cd
X~ /etc /usr/pub /tmp ~ /usr/bin /usr
X~> unsetopt pushdtohome
X~> cd
X/etc ~ /usr/pub /tmp ~ /usr/bin /usr
X/etc>
X
X
XDIRSTACKSIZE keeps the  directory  stack  from  getting  too
Xlarge, much like HISTSIZE:
X
X/etc> setopt pushdsilent
X/etc> cd /
X/> cd /
X/> cd /
X/> cd /
X/> cd /
X/> cd /
X/> cd /
X/> cd /
X/> dh
X0       /
X1       /
X2       /
X3       /
X4       /
X5       /
X6       /
X7       /
X
X
X
X
X
X
X
X
X
X
X                           - 14 -
XCommand/Process Substitution
X
XCommand substitution in zsh can  take  two  forms.   In  the
Xtraditional  form,  a command enclosed in backquotes (`...`)
Xis replaced on the command line with its  output.   This  is
Xthe  form used by the older shells.  Newer shells (like zsh)
Xalso provide another form, $(...).  This form is much easier
Xto nest.
X
X% ls -l `echo /vmunix`
X-rwxr-xr-x  1 root      1209702 May 14 19:04 /vmunix
X% ls -l $(echo /vmunix)
X-rwxr-xr-x  1 root      1209702 May 14 19:04 /vmunix
X% who | grep mad
Xsubbarao ttyt7   May 23 15:02   (mad55sx15.Prince)
Xpfalstad ttyu1   May 23 16:25   (mad55sx14.Prince)
Xsubbarao ttyu6   May 23 15:04   (mad55sx15.Prince)
Xpfalstad ttyv3   May 23 16:25   (mad55sx14.Prince)
X% who | grep mad | awk '{print $2}'
Xttyt7
Xttyu1
Xttyu6
Xttyv3
X% cd /dev; ls -l $(who |
X> grep $(echo mad) |
X> awk '{ print $2 }')
Xcrwx-w----  1 subbarao  20,  71 May 23 18:35 ttyt7
Xcrw--w----  1 pfalstad  20,  81 May 23 18:42 ttyu1
Xcrwx-w----  1 subbarao  20,  86 May 23 18:38 ttyu6
Xcrw--w----  1 pfalstad  20,  99 May 23 18:41 ttyv3
X
X
XMany common  uses  of  command  substitution,  however,  are
Xsuperseded by other mechanisms of zsh:
X
X% ls -l `tty`
Xcrw-rw-rw-  1 root      20,  28 May 23 18:35 /dev/ttyqc
X% ls -l $TTY
Xcrw-rw-rw-  1 root      20,  28 May 23 18:35 /dev/ttyqc
X% ls -l `which rn`
X-rwxr-xr-x  1 root       172032 Mar  6 18:40 /usr/princeton/bin/rn
X% ls -l =rn
X-rwxr-xr-x  1 root       172032 Mar  6 18:40 /usr/princeton/bin/rn
X
X
XA command name with a = prepended is replaced with its  full
Xpathname.   This  can  be very convenient.  If it's not con-
Xvenient for you, you can turn it off:
X
X% ls
X=foo    =bar
X% ls =foo =bar
Xzsh: foo not found
X% setopt noequals
X% ls =foo =bar
X=foo    =bar
X
X
X
XAnother nice feature is process substitution:
X
X
X
X
X
X                           - 15 -
X
X% who | fgrep -f =(print -l root lemke shgchan subbarao)
Xroot     console May 19 10:41
Xlemke    ttyq0   May 22 10:05   (narnia:0.0)
Xlemke    ttyr7   May 22 10:05   (narnia:0.0)
Xlemke    ttyrd   May 22 10:05   (narnia:0.0)
Xshgchan  ttys1   May 23 16:52   (gaudi.Princeton.)
Xsubbarao ttyt7   May 23 15:02   (mad55sx15.Prince)
Xsubbarao ttyu6   May 23 15:04   (mad55sx15.Prince)
Xshgchan  ttyvb   May 23 16:51   (gaudi.Princeton.)
X
X
XA command of the form =(...) is replaced with the name of  a
Xfile containing its output.  (A command substitution, on the
Xother hand, is replaced with the output itself.) print -l is
Xlike  echo,  excepts  that  it  prints its arguments one per
Xline, the way fgrep expects them:
X
X% print -l foo bar
Xfoo
Xbar
X
X
XWe could also have written:
X
X% who | fgrep -f =(echo 'root
X> lemke
X> shgchan
X> subbarao')
X
X
XUsing process substitution, you can edit  the  output  of  a
Xcommand:
X
X% ed =(who | fgrep -f ~/.friends)
X355
Xg/lemke/d
Xw /tmp/filbar
X226
Xq
X% cat /tmp/filbar
Xroot     console May 19 10:41
Xshgchan  ttys1   May 23 16:52   (gaudi.Princeton.)
Xsubbarao ttyt7   May 23 15:02   (mad55sx15.Prince)
Xsubbarao ttyu6   May 23 15:04   (mad55sx15.Prince)
Xshgchan  ttyvb   May 23 16:51   (gaudi.Princeton.)
X
X
Xor easily read archived mail:
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X                           - 16 -
X
X% mail -f =(zcat ~/mail/oldzshmail.Z)
X"/tmp/zsha06024": 84 messages, 0 new, 43 unread
X>  1  U  TO: pfalstad, zsh (10)
X   2  U  nytim![e-mail], Re: Zsh on Sparc1 /SunOS 4.0.3
X   3  U  [e-mail], zsh fix (15)
X   4  U  [e-mail], way to find out if running zsh? (25)
X   5  U  [e-mail], Re: way to find out if running zsh? (17)
X   6   r [e-mail], Meta . (18)
X   7  U  [e-mail], Re: problem building zsh (147)
X   8  U  nytim![e-mail], Re: Zsh on Sparc1 /SunOS 4.0.3
X   9     ursa!jmd, Another fix... (61)
X  10  U  [e-mail], Re: v18i084: Zsh 2.00 - A small complaint (36)
X  11  U  [e-mail], POSIX job control (34)
X  12  U  yale!bronson![e-mail]
X  13  U  [e-mail], zsh (36)
X  14  S  subbarao, zsh sucks!!!! (286)
X  15  U  snibru!d241s008!d241s013![e-mail], zsh (165)
X  16  U  nytim![e-mail], Re: Zsh on Sparc1 /SunOS 4.0.3
X  17  U  subbarao, zsh is a junk shell (43)
X  18  U  [e-mail], zsh (33)
X43u/84 1: x
X% ls -l /tmp/zsha06024
X/tmp/zsha06024 not found
X
X
XNote that the shell creates a temporary file, and deletes it
Xwhen the command is finished.
X
X% diff =(ls) =(ls -F)
X3c3
X< fortune
X---
X> fortune*
X10c10
X< strfile
X---
X> strfile*
X
X
XIf you read zsh's man page, you may notice  that  <(...)  is
Xanother  form  of  process  substitution which is similar to
X=(...).  There is an important difference between  the  two.
XIn  the  <(...)  case, the shell creates a named pipe (FIFO)
Xinstead of a file.  This is better, since it does  not  fill
Xup  the  file system; but it does not work in all cases.  In
Xfact, if we had replaced =(...) with <(...) in the  examples
Xabove,  all  of  them  would have stopped working except for
Xfgrep -f <(...).  You can not edit a pipe, or open it  as  a
Xmail  folder;  fgrep, however, has no problem with reading a
Xlist of words from a pipe.  You may wonder why  diff  <(foo)
Xbar  doesn't  work,  since  foo  | diff - bar works; this is
Xbecause diff creates a temporary file if it notices that one
Xof its arguments is -, and then copies its standard input to
Xthe temporary file.
X
XAliasing
X
XOften-used commands can be abbreviated with an alias:
X
X
X
X
X
X
X                           - 17 -
X
X% alias uc=uncompress
X% ls
Xhanoi.Z
X% uc hanoi
X% ls
Xhanoi
X
X
Xor commands with certain desired options:
X
X% alias fm='finger -m'
X% fm root
XLogin name: root                        In real life: Operator
XDirectory: /                            Shell: /bin/csh
XOn since May 19 10:41:15 on console     3 days 5 hours Idle Time
XNo unread mail
XNo Plan.
X
X% alias lock='lock -p -60000'
X% lock
Xlock: /dev/ttyr4 on phoenix. timeout in 60000 minutes
Xtime now is Fri May 24 04:23:18 EDT 1991
XKey:
X
X% alias l='ls -AF'
X% l /
X.bash_history              kadb*
X.bashrc                    lib@
X.cshrc                     licensed/
X.exrc                      lost+found/
X.login                     macsyma
X
X
XAliases can also be used to replace old commands:
X
X% alias grep=egrep ps=sps make=gmake
X% alias whoami='echo root'
X% whoami
Xroot
X
X
Xor to define new ones:
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X                           - 18 -
X
X% cd /
X% alias sz='ls -l | sort -n +3 | tail -10'
X% sz
Xdrwxr-sr-x  7 bin          3072 May 23 11:59 etc
Xdrwxrwxrwx 26 root         5120 May 24 04:20 tmp
Xdrwxr-xr-x  2 root         8192 Dec 26 19:34 lost+found
Xdrwxr-sr-x  2 bin         14848 May 23 18:48 dev
X-r--r--r--  1 root       140520 Dec 26 20:08 boot
X-rwxr-xr-x  1 root       311172 Dec 26 20:08 kadb
X-rwxr-xr-x  1 root      1209695 Apr 16 15:33 vmunix.old
X-rwxr-xr-x  1 root      1209702 May 14 19:04 vmunix
X-rwxr-xr-x  1 root      1209758 May 21 12:23 vmunix.new.kernelmap.old
X-rwxr-xr-x  1 root      1711848 Dec 26 20:08 vmunix.org
X% cd
X% alias rable='ls -AFtrd *(R)' nrable='ls -AFtrd *(^R)'
X% rable
XREADME      func/       bin/        pub/        News/       src/
Xnicecolors  etc/        scr/        tmp/        iris/       zsh*
X% nrable
XMailboxes/  mail/       notes
X
X
X(The pattern *(R) matches all readable files in the  current
Xdirectory, and *(^R) matches all unreadable files.)
X
XMost  other  shells  have  aliases  of  this  kind  (command
Xaliases).   However,  zsh also has global aliases, which are
Xsubstituted anywhere on a line.  Global aliases can be  used
Xto abbreviate frequently-typed usernames, hostnames, etc.
X
X% alias -g me=pfalstad gun=egsirer mjm=maruchck
X% who | grep me
Xpfalstad ttyp0   May 24 03:39   (mickey.Princeton)
Xpfalstad ttyp5   May 24 03:42   (mickey.Princeton)
X% fm gun
XLogin name: egsirer                     In real life: Emin Gun Sirer
XDirectory: /u/egsirer                   Shell: /bin/sh
XLast login Thu May 23 19:05 on ttyq3 from bow.Princeton.ED
XNew mail received Fri May 24 02:30:28 1991;
X  unread since Fri May 24 02:30:27 1991
X% alias -g phx=phoenix.princeton.edu warc=wuarchive.wustl.edu
X% ftp warc
XConnected to wuarchive.wustl.edu.
X
X
XHere are some more interesting uses.
X
X% alias -g M='| more' GF='| fgrep -f ~/.friends'
X% who M   # pipes the output of who through more
X% who GF  # see if your friends are on
X% w GF    # see what your friends are doing
X
X
XAnother example makes use of zsh's process substitution.  If
Xyou run NIS, and you miss being able to do this:
X
X% grep pfalstad /etc/passwd
X
X
X
X
X
X
X
X                           - 19 -
Xyou can define an alias that will  seem  more  natural  than
Xypmatch pfalstad passwd:
X
X% alias -g PASS='<(ypcat passwd)'
X% grep pfalstad PASS
Xpfalstad:*:3564:35:Paul John Falstad:/u/pfalstad:/usr/princeton/bin/zsh
X
X
XIf you're really crazy, you can even call it /etc/passwd:
X
X% alias -g /etc/passwd='<(ypcat passwd)'
X% grep pfalstad /etc/passwd
Xpfalstad:*:3564:35:Paul John Falstad:/u/pfalstad:/usr/princeton/bin/zsh
X
X
XThe last example shows one of the perils of global  aliases;
Xthey  have a lot of potential to cause confusion.  For exam-
Xple, if you defined a global alias called | (which is possi-
Xble), zsh would begin to act very strangely; every pipe sym-
Xbol would be replaced with the text of your alias.  To  some
Xextent,  global  aliases are like macros in C; discretion is
Xadvised in using them and in choosing names for them.  Using
Xnames  in all caps is not a bad idea, especially for aliases
Xwhich introduce shell metasyntax (like M and GF above).
X
XNote that zsh aliases are not like csh aliases.  The  syntax
Xfor  defining  them is different, and they do not have argu-
Xments.  All your favorite csh aliases will probably not work
Xunder zsh.  For example, if you try:
X
Xalias rm mv '\!* /tmp/wastebasket'
X
X
Xno aliases will be defined,  but  zsh  will  not  report  an
Xerror.   In  csh,  this  line defines an alias that makes rm
Xsafe---files that are rm'd will  be  moved  to  a  temporary
Xdirectory  instead of instantly destroyed.  In zsh's syntax,
Xhowever, this line asks the  shell  to  print  any  existing
Xalias definitions for rm, mv, or !* /tmp/wastebasket.  Since
Xthere are none, most likely, the shell will not  print  any-
Xthing,  although alias will return a nonzero exit code.  The
Xproper syntax is this:
X
Xalias rm='mv \!* /tmp/wastebasket'
X
X
XHowever, this won't work either:
X
X% rm foo.dvi
Xzsh: no matches found: !*
X
X
XWhile this makes rm safe, it is certainly not what the  user
Xintended.  In zsh, you must use a shell function for this:
X
X% unalias rm
X% rm () { mv $* /tmp/wastebasket }
X% rm foo.dvi
X% ls /tmp/wastebasket
Xfoo.dvi
X
X
X
X
X
X                           - 20 -
XWhile this is much cleaner and easier to read  (I  hope  you
Xwill  agree), it is not csh-compatible.  Therefore, a script
Xto convert csh aliases and variables has been provided.  You
Xshould  only  need  to  use it once, to convert all your csh
Xaliases and parameters to zsh format:
X
X% csh
Xcsh> alias
Xl       ls -AF
Xmore    less
Xon      last -2 !:1 ; who | grep !:1
Xcsh> exit
X% c2z >neat_zsh_aliases
X% cat neat_zsh_aliases
Xalias l='ls -AF'
Xalias more='less'
Xon () { last -2 $1 ; who | grep $1 }
X...
X
X
XThe first two aliases were converted to regular zsh aliases,
Xwhile  the  third,  since it needed to handle arguments, was
Xconverted to a function.  c2z can convert  most  aliases  to
Xzsh  format  without any problems.  However, if you're using
Xsome really arcane csh tricks, or if you have an alias  with
Xa  name  like do (which is reserved in zsh), you may have to
Xfix some of the aliases by hand.
X
XThe c2z script checks your csh setup, and produces a list of
Xzsh commands which replicate your aliases and parameter set-
Xtings as closely as possible.  You could include its  output
Xin your startup file, .zshrc.
X
XHistory
X
XThere are several ways to manipulate history  in  zsh.   One
Xway is to use csh-style ! history:
X
X% /usr/local/bin/!:0 !-2*:s/foo/bar/ >>!$
X
X
XIf you don't want to use this, you can turn it off by typing
Xsetopt nobanghist.
X
XAnother way is to use the fc command.  For example,  if  you
Xtype an erroneous command:
X
X% for i in `cat /etc/clients`
X do
X rpu $i
X done
Xzsh: command not found: rpu
Xzsh: command not found: rpu
Xzsh: command not found: rpu
X
X
Xtyping fc will execute an editor on this  command,  allowing
Xyou  to  fix it.  (The default editor is vi, by the way, not
Xed).
X
X
X
X
X
X
X                           - 21 -
X
X% fc
X49
X/rpu/s//rup/p
X rup $i
Xw
X49
Xq
Xfor i in `cat /etc/clients`
X do
X rup $i
X done
X        beam    up  2 days, 10:17,    load average: 0.86, 0.80, 0.50
X         bow    up  4 days,  8:41,    load average: 0.91, 0.80, 0.50
X        burn    up          17:18,    load average: 0.91, 0.80, 0.50
X       burst    up  9 days,  1:49,    load average: 0.95, 0.80, 0.50
X         tan    up          11:14,    load average: 0.91, 0.80, 0.50
X       bathe    up  3 days, 17:49,    load average: 1.84, 1.79, 1.50
X        bird    up  1 day,   9:13,    load average: 1.95, 1.82, 1.51
X      bonnet    up  2 days, 21:18,    load average: 0.93, 0.80, 0.50
X
X
XA variant of the fc command is r, which redoes the last com-
Xmand, with optional changes:
X
X% echo foo
Xfoo
X% r
Xecho foo
Xfoo
X
X% echo foo
Xfoo
X% r foo=bar
Xecho bar
Xbar
X
X
X
XCommand Line Editing
X
Xzsh's command line editor, ZLE, is quite  powerful.   It  is
Xdesigned  to  emulate  either  emacs  or  vi; the default is
Xemacs.  To set the bindings for vi mode, type bindkey -v.
X
XIn addition to basic editing, the shell allows you to recall
Xprevious  lines in the history.  In emacs mode, this is done
Xwith ^P (control-P):
X
X% ls ~
X-           README      file        mail        pub         tmp
XMailboxes   bin         func        nicecolors  scr         zsh
XNews        etc         iris        notes       src
X% echo foobar
Xfoobar
X% ^P
X% echo foobar^P
X% ls ~_
X
X
X
X
X
X
X
X                           - 22 -
XPressing ^P once brings up the previous line (echo  foobar);
Xpressing  it  again  brings  up the line before that (ls ~).
XThe cursor is left at the end of the line, allowing  you  to
Xedit  the  line  if  desired  before  executing it.  In many
Xcases, ZLE eliminates the need for the fc command, since  it
Xis powerful enough to handle even multiline commands:
X
X% for i in a b c d e
X> do
X> echo $i
X> done
Xa
Xb
Xc
Xd
Xe
X% ^P
X% for i in a b c d e
X do
X echo $i
X done_
X
X
XNow you can just move up to the part you want to change...
X
X% for i in _ b c d e
X do
X echo $i
X done
X
X
Xchange it, and execute the new command.
X
X% for i in f g h i j
X do
X echo $i
X done
Xf
Xg
Xh
Xi
Xj
X
X
XAlso, you can search the history for a certain command using
XESC-P:
X
X% set ESC-P
X% setopt autolist ESC-P
X% setopt nocorrect_
X
X
XAnother way is to do an incremental search, emacs-style:
X
X
X
X
X
X
X
X
X
X
X
X
X                           - 23 -
X
X% ^R
X% _
Xi-search:
X
X% l_ /usr/bin
Xi-search: l
X
X% date > foofile_c
Xi-search: le
X
X
XAnother useful feature of the editor is command and filename
Xcompletion.
X
X% compTAB
X% compress _
X
X% ls /nicTAB
X% ls /nicecolors _
X
X% ls /usr/prTAB
X% ls /usr/princeton/_
X
X% ls -l =comTAB
X% ls -l =compress _
X
X
XIf the completion is ambiguous, the editor will  beep.   You
Xcan list possible completions by pressing ^D:
X
X% ls /vmuTAB -beep-
X% ls /vmunix_
X% ls /vmunix^D
Xvmunix                    vmunix.old
Xvmunix.new.kernelmap.old  vmunix.org
X
X
XOr, you could just set the AUTOLIST option:
X
X% setopt autolist
X% ls /vmuTAB -beep-
Xvmunix                    vmunix.old
Xvmunix.new.kernelmap.old  vmunix.org
X% ls /vmunix_
X
X
XAnother option you could set is RECEXACT, which causes exact
Xmatches  to  be  accepted,  even if there are other possible
Xcompletions:
X
X% setopt recexact
X% ls /vmuTAB -beep-
Xvmunix                    vmunix.old
Xvmunix.new.kernelmap.old  vmunix.org
X% ls /vmunix_TAB
X% ls /vmunix _
X
X
XThe fignore variable  lists  suffixes  of  files  to  ignore
X
X
X
X
X
X                           - 24 -
Xduring completion.
X
X% ls fooTAB -beep-
Xfoofile.c  foofile.o
X% fignore=( .o \~ .bak .junk )
X% ls fooTAB
X% ls foofile.c _
X
X
XSince foofile.o has a suffix that is in the fignore list, it
Xwas not considered a possible completion of foo.
X
XUsername completion is also supported:
X
X% ls ~pfalTAB
X% ls ~pfalstad/_
X
X
Xand parameter name completion:
X
X% echo $ORGTAB
X% echo $ORGANIZATION _
X
X
Xand hostname completion, if you give the  shell  a  list  of
Xhosts to complete:
X
X% hosts=( phoenix.princeton.edu uunet.uu.net nic.ddn.mil
X> diskfarm.princeton.edu gnu.ai.mit.edu
X> eniac.seas.upenn.edu )
X% telnet diskTAB
X% telnet diskfarm.princeton.edu _
X
X% ftp uuTAB
X% ftp uunet.uu.net _
X
X% mail subbarao@phTAB
X% mail [e-mail] _
X
X
Xand option completion:
X
X% setopt noclTAB
X% setopt noclobber _
X
X
Xand binding completion:
X
X% bindkey '^X^X' puTAB
X% bindkey '^X^X' push-line _
X
X
X
XThe compctl command is used to control how completion works.
XFor example, to specify that certain commands show take com-
Xmands as arguments, you use compctl -c:
X
X% compctl -c man nohup
X% man uptTAB
X% man uptime _
X
X
X
X
X
X                           - 25 -
XTo specify that a command  should  complete  filenames,  you
Xshould use compctl -f.  This is the default.  It can be com-
Xbined with -c, as well.
X
X% compctl -cf echo
X% echo uptTAB
X% echo uptime _
X
X% echo foTAB
X% echo foo.c
X
X
XSimilarly, use  -h  to  specify  hostnames,  -o  to  specify
Xoptions,  -v  to  specify variables, and -b to specify bind-
Xings.
X
X% compctl -h rlogin
X% compctl -hfc rsh
X% compctl -b bindkey
X
X
XYou can also use -k to specify a custom list of keywords  to
Xuse in completion.
X
X% ftphosts=(ftp.uu.net wuarchive.wustl.edu)
X% compctl -k ftphosts ftp
X% ftp wuTAB
X% ftp wuarchive.wustl.edu _
X
X% friends=(cpirazzi subbarao sukthnkr)
X% compctl -k friends mail finger su
X% finger cpTAB
X% finger cpirazzi _
X
X
X
XIn addition to completion, TAB performs expansion if  possi-
Xble.
X
X% ls *.cTAB
X% ls foofile.c fortune.c rnd.c strfile.c unstr.c_
X
X
XFor example, suppose you have a bunch of weird files  in  an
Ximportant directory:
X
X% ls
X  * * *       ; & % $??foo  dspfok        foo.c
X  !"foo"!       ` \ `         foo           rrr
X
X
XYou want to remove them, but you don't want to damage foo.c.
XHere is one way to do this:
X
X% rm *TAB
X% rm \ \ \*\ \*\ \*\ \ \  \!\"foo\"\! \;\ \&\ %\ \$'
X'foo \`\ \\\ \` dspfok foo foo.c rrr_
X
X
XWhen you expand *, zsh inserts the names of  all  the  files
X
X
X
X
X
X                           - 26 -
Xinto  the  editing  buffer, with proper shell quoting.  Now,
Xjust move back and remove foo.c from the buffer:
X
X% rm \ \ \*\ \*\ \*\ \ \  \!\"foo\"\! \;\ \&\ %\ \$'
X'foo \`\ \\\ \` dspfok foo _rr
X
X
Xand press return.  Everything except foo.c will  be  deleted
Xfrom the directory.
X
XHere's another trick; let's say you have typed this  command
Xin:
X
X% gcc -o x.out foob.c -g -Wpointer-arith -Wtrigraphs_
X
X
Xand you forget which library you want.  You need  to  escape
Xout  for  a  minute and check by typing ls /usr/lib, or some
Xother such command; but you don't want to retype  the  whole
Xcommand  again,  and  you can't press return now because the
Xcurrent command is incomplete.  In zsh, you can put the line
Xon  the  buffer stack, using ESC-Q, and type some other com-
Xmands.  The next time a prompt is printed, the gcc line will
Xbe  popped  off  the  stack  and  put  in the editing buffer
Xautomatically; you can then enter the  proper  library  name
Xand  press  return  (or, ESC-Q again and look for some other
Xlibraries whose names you forgot).
X
XA similar situation: what if you forget the  option  to  gcc
Xthat  finds  bugs using AI techniques?  You could either use
XESC-Q again, and type man gcc, or  you  could  press  ESC-H,
Xwhich  essentially  does the same thing; it puts the current
Xline on the buffer stack, and executes the command  run-help
Xgcc, where run-help is an alias for man.
X
XAnother interesting command is  ESC-A.   This  executes  the
Xcurrent  line,  but  retains  it  in  the buffer, so that it
Xappears again when the next prompt is  printed.   Also,  the
Xcursor  stays in the same place.  This is useful for execut-
Xing a series of similar commands:
X
X% cc grok.c -g -lc -lgl -lsun -lmalloc -Bstatic -o b.out
X% cc fubar.c -g -lc -lgl -lsun -lmalloc -Bstatic -o b.out
X% cc fooble.c -g -lc -lgl -lsun -lmalloc -Bstatic -o b.out
X
X
X
XThe ESC-' command is useful for managing the shell's quoting
Xconventions.  Let's say you want to print this string:
X
Xdon't do that; type 'rm -rf \*', with a \ before the *.
X
X
XAll that is necessary is to type it into the editing buffer:
X
X% don't do that; type 'rm -rf \*', with a \ before the *.
X
X
Xpress ESC-' (escape-quote):
X
X
X
X
X
X
X                           - 27 -
X
X% 'don'\''t do that; type '\''rm -rf \*'\'', with a \ before the *.'
X
X
Xthen move to the beginning and add the echo command.
X
X% echo 'don'\''t do that; type '\''rm -rf \*'\'', with a \ before the *.'
Xdon't do that; type 'rm -rf \*', with a \ before the *.
X
X
XLet's say you want to create an alias to do this  echo  com-
Xmand.   This  can  be done by recalling the line with ^P and
Xpressing ESC-' again:
X
X% 'echo '\''don'\''\'\'''\''t do that; type '\''\'\'''\''rm -rf
X\*'\''\'\'''\'', with a \ before the *.'\'''
X
X
Xand then move to the beginning and add the command to create
Xan alias.
X
X% alias zoof='echo '\''don'\''\'\'''\''t do that; type '\''\'\'''\''rm
X-rf \*'\''\'\'''\'', with a \ before the *.'\'''
X% zoof
Xdon't do that; type 'rm -rf \*', with a \ before the *.
X
X
X
XAnother interesting option is  MENUCOMPLETE.   This  affects
Xthe way TAB works.  Let's look at the /vmunix example again:
X
X% setopt menucomplete
X% ls /vmuTAB
X% ls /vmunixTAB
X% ls /vmunix.new.kernelmap.oldTAB
X% ls /vmunix.old_
X
X
XEach time you press TAB, it displays the next possible  com-
Xpletion.   In  this  way, you can cycle through the possible
Xcompletions until you find the one you want.
X
XThe AUTOMENU option makes a  nice  compromise  between  this
Xmethod  of  completion  and  the regular method.  If you set
Xthis option, pressing the TAB key repeatedly after an  ambi-
Xguous  completion  will  cycle  through the possible comple-
Xtions.
X
XBindings
X
XEach of the above editor commands was  actually  a  function
Xbound  by  default  to a certain key.  The real names of the
Xcommands are:
X
Xexpand-or-complete   TAB
Xpush-line            ESC-Q
Xrun-help             ESC-H
Xaccept-and-hold      ESC-A
Xquote-line           ESC-'
X
X
X
X
X
X
X                           - 28 -
XThese bindings are arbitrary; you could change them  if  you
Xwant.  For example, to bind accept-line to ^Z:
X
X% bindkey '^Z' accept-line
X
X
XAnother idea would be to bind the delete key to delete-char;
Xthis might be convenient if you use ^H for backspace.
X
X% bindkey '^?' delete-char
X
X
XOr, you could bind ^X^H to run-help:
X
X% bindkey '^X^H' run-help
X
X
XOther examples:
X
X% bindkey '^X^Z' universal-argument
X% bindkey ' ' magic-space
X% bindkey -s '^T' 'uptime
X> '
X
X
Xuniversal-argument multiplies the next command by  4.   Thus
X^X^Z^W might delete the last four words on the line.  If you
Xbind space to magic-space, then csh-style history  expansion
Xis done on the line whenever you press the space bar.
X
XThe -s flag to bindkey specifies that you  are  binding  the
Xkey  to  a  string,  not  a  command.   Thus bindkey -s '^T'
X'uptime\n' lets you VMS lovers get the load average whenever
Xyou press ^T.
X
XIf you have a NeXT keyboard, the one with the | and  \  keys
Xvery  inconveniently placed, the following bindings may come
Xin handy:
X
X% bindkey -s '\e/' '\\'
X% bindkey -s '\e=' '|'
X
X
XNow you can type ALT-/ to get a backslash, and ALT-= to  get
Xa  vertical  bar.   This  only  works inside zsh, of course;
Xbindkey has no effect on the key  mappings  inside  talk  or
Xmail, etc.
X
XAnother use of the editor is to edit the value of variables.
XFor  example,  an easy way to change your path is to use the
Xvared command:
X
X% vared PATH
X> /u/pfalstad/scr:/u/pfalstad/bin/sun4:/u/maruchck/scr:/u/subbarao/bin:/u/maruc
Xhck/bin:/u/subbarao/scripts:/usr/princeton/bin:/usr/ucb:/usr/bin:/bin:/usr/host
Xs:/usr/princeton/bin/X11:/./usr/lang:/./usr/etc:/./etc
X
X
XYou can now edit the path.  When you press return, the  con-
Xtents of the edit buffer will be assigned to PATH.
X
X
X
X
X
X                           - 29 -
XParameter Substitution
X
XIn zsh, parameters are set like this:
X
X% foo=bar
X% echo $foo
Xbar
X
X
XSpaces before or after the = are frowned upon:
X
X% foo = bar
Xzsh: command not found: foo
X
X
XAlso, set doesn't work for setting parameters:
X
X% set foo=bar
X% set foo = bar
X% echo $foo
X
X%
X
X
XNote that no error message was  printed.   This  is  because
Xboth of these commands were perfectly valid; the set builtin
Xassigns its arguments to the positional parameters ($1,  $2,
Xetc.).
X
X% set foo=bar
X% echo $1
Xfoo=bar
X% set foo = bar
X% echo $3 $2
Xbar =
X
X
XIf you're really intent on using the csh  syntax,  define  a
Xfunction like this:
X
X% set () {
X>    eval "$1$2$3"
X> }
X% set foo = bar
X% set fuu=brrr
X% echo $foo $fuu
Xbar brrr
X
X
XBut then, of course you can't  use  the  form  of  set  with
Xoptions,  like set -F (which turns off filename generation).
XAlso, the set command by itself won't list all  the  parame-
Xters  like  it  should.   To get around that you need a case
Xstatement:
X
X
X
X
X
X
X
X
X
X
X
X                           - 30 -
X
X% set () {
X>    case $1 in
X>    -*|+*|'') builtin set $* ;;
X>    *) eval "$1$2$3" ;;
X>    esac
X> }
X
X
XFor the most part, this should make csh users happy.
X
XThe following sh-style operators are supported in zsh:
X
X% unset null
X% echo ${foo-xxx}
Xbar
X% echo ${null-xxx}
Xxxx
X% unset null
X% echo ${null=xxx}
Xxxx
X% echo $null
Xxxx
X% echo ${foo=xxx}
Xbar
X% echo $foo
Xbar
X% unset null
X% echo ${null+set}
X
X% echo ${foo+set}
Xset
X
X
XAlso, csh-style : modifiers may be appended to  a  parameter
Xsubstitution.
X
X% echo $PWD
X/home/learning/pf/zsh/zsh2.00/src
X% echo $PWD:h
X/home/learning/pf/zsh/zsh2.00
X% echo $PWD:h:h
X/home/learning/pf/zsh
X% echo $PWD:t
Xsrc
X% name=foo.c
X% echo $name
Xfoo.c
X% echo $name:r
Xfoo
X% echo $name:e
Xc
X
X
XThe equivalent constructs in ksh (which are  also  supported
Xin zsh) are a bit more general and easier to remember.  When
Xthe shell expands  ${foo#pat},  it  checks  to  see  if  pat
Xmatches  a  substring  at the beginning of the value of foo.
XIf so, it removes that portion of foo,  using  the  shortest
Xpossible  match.   With  ${foo##pat},  the  longest possible
X
X
X
X
X
X                           - 31 -
Xmatch is removed.  ${foo%pat}  and  ${foo%%pat}  remove  the
Xmatch  from  the end.  Here are the ksh equivalents of the :
Xmodifiers:
X
X% echo ${PWD%/*}
X/home/learning/pf/zsh/zsh2.00
X% echo ${PWD%/*/*}
X/home/learning/pf/zsh
X% echo ${PWD##*/}
Xsrc
X% echo ${name%.*}
Xfoo
X% echo ${name#*.}
Xc
X
X
Xzsh also has upper/lowercase modifiers:
X
X% xx=Test
X% echo $xx:u
XTEST
X% echo $xx:l
Xtest
X
X
Xand a substitution modifier:
X
X% echo $name:s/foo/bar/
Xbar.c
X% ls
Xfoo.c    foo.h    foo.o    foo.pro
X% for i in foo.*; mv $i $i:s/foo/bar/
X% ls
Xbar.c    bar.h    bar.o    bar.pro
X
X
XOne possible source of confusion is the fact  that  in  zsh,
Xthe  result  of  parameter  substitution  is  not split into
Xwords.  Thus, this will not work:
X
X% srcs='glob.c exec.c init.c'
X% ls $srcs
Xglob.c exec.c init.c not found
X
X
XThis is considered a feature, not a bug.  If splitting  were
Xdone  by  default,  as it is in most other shells, functions
Xlike this would not work properly:
X
X$ ll () { ls -F $* }
X$ ll 'fuu bar'
Xfuu not found
Xbar not found
X
X% ll 'fuu bar'
Xfuu bar not found
X
X
XOf course, a hackish workaround  is  available  in  sh  (and
Xzsh):
X
X
X
X
X
X                           - 32 -
X
X% setopt shwordsplit
X% ll () { ls -F "$@" }
X% ll 'fuu bar'
Xfuu bar not found
X
X
XIf you like the sh behaviour, zsh can accomodate you:
X
X% ls ${=srcs}
Xexec.c  glob.c  init.c
X% setopt shwordsplit
X% ls $srcs
Xexec.c  glob.c  init.c
X
X
XAnother way to get the $srcs trick to  work  is  to  use  an
Xarray:
X
X% unset srcs
X% srcs=( glob.c exec.c init.c )
X% ls $srcs
Xexec.c  glob.c  init.c
X
X
Xor an alias:
X
X% alias -g SRCS='exec.c glob.c init.c'
X% ls SRCS
Xexec.c  glob.c  init.c
X
X
XAnother option that modifies parameter  expansion  is  RCEX-
XPANDPARAM:
X
X% echo foo/$srcs
Xfoo/glob.c exec.c init.c
X% setopt rcexpandparam
X% echo foo/$srcs
Xfoo/glob.c foo/exec.c foo/init.c
X% echo foo/${^srcs}
Xfoo/glob.c foo/exec.c foo/init.c
X% echo foo/$^srcs
Xfoo/glob.c foo/exec.c foo/init.c
X
X
X
XShell Parameters
X
XThe  shell  has  many  predefined  parameters  that  may  be
Xaccessed.  Here are some examples:
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X                           - 33 -
X
X% sleep 10 &
X[1] 3820
X% echo $!
X3820
X% set a b c
X% echo $#
X3
X% echo $ARGC
X3
X% ( exit 20 ) ; echo $?
X20
X% false; echo $status
X1
X
X
X($? and $status are equivalent.)
X
X% echo $HOST $HOSTTYPE
Xdendrite sun4
X% echo $UID $GID
X701 60
X% cd /tmp
X% cd /home
X% echo $PWD $OLDPWD
X/home /tmp
X% ls $OLDPWD/.getwd
X/tmp/.getwd
X
X
X~+ and ~- are short for $PWD and $OLDPWD, respectively.
X
X% ls ~-/.getwd
X/tmp/.getwd
X% ls -d ~+/learning
X/home/learning
X% echo $RANDOM
X4880
X% echo $RANDOM
X11785
X% echo $RANDOM
X2062
X% echo $TTY
X/dev/ttyp4
X% echo $VERSION
Xzsh v2.00.03
X% echo $USERNAME
Xpf
X
X
X
XThe cdpath variable sets the search path for the cd command.
XIf you do not specify . somewhere in the path, it is assumed
Xto be the first component.
X
X
X
X
X
X
X
X
X
X
X
X                           - 34 -
X
X% cdpath=( /usr ~ ~/zsh )
X% ls /usr
X5bin         dict         lang         net          sccs         sys
X5include     etc          lector       nserve       services     tmp
X5lib         export       lib          oed          share        ucb
Xadm          games        local        old          skel         ucbinclude
Xbin          geac         lost+found   openwin      spool        ucblib
Xboot         hosts        macsyma_417  pat          src          xpg2bin
Xdemo         include      man          princeton    stand        xpg2include
Xdiag         kvm          mdec         pub          swap         xpg2lib
X% cd spool
X/usr/spool
X% cd bin
X/usr/bin
X% cd func
X~/func
X% cd
X% cd pub
X% pwd
X/u/pfalstad/pub
X% ls -d /usr/pub
X/usr/pub
X
X
XPATH and path both set the search path for commands.   These
Xtwo  variables  are  equivalent, except that one is a string
Xand one is an array.  If the user modifies PATH,  the  shell
Xchanges path as well, and vice versa.
X
X% PATH=/bin:/usr/bin:/tmp:.
X% echo $path
X/bin /usr/bin /tmp .
X% path=( /usr/bin . /usr/local/bin /usr/ucb )
X% echo $PATH
X/usr/bin:.:/usr/local/bin:/usr/ucb
X
X
XThe same is true of CDPATH and cdpath:
X
X% echo $CDPATH
X/usr:/u/pfalstad:/u/pfalstad/zsh
X% CDPATH=/u/subbarao:/usr/src:/tmp
X% echo $cdpath
X/u/subbarao /usr/src /tmp
X
X
XIn general, parameters  with  names  in  all  lowercase  are
Xarrays; assignments to them take the form:
X
Xname=( elem ... )
X
X
XParameters with names in  all  uppercase  are  strings.   If
Xthere  is  both  an  array  and a string version of the same
Xparameter, the string version  is  a  colon-separated  list,
Xlike PATH.
X
XHISTFILE is the name of the history file, where the  history
Xis saved when a shell exits.
X
X
X
X
X
X                           - 35 -
X
X% zsh
Xphoenix% HISTFILE=/tmp/history
Xphoenix% SAVEHIST=20
Xphoenix% echo foo
Xfoo
Xphoenix% date
XFri May 24 05:39:35 EDT 1991
Xphoenix% uptime
X  5:39am  up 4 days, 20:02,  40 users,  load average: 2.30, 2.20, 2.00
Xphoenix% exit
X% cat /tmp/history
XHISTFILE=/tmp/history
XSAVEHIST=20
Xecho foo
Xdate
Xuptime
Xexit
X% HISTSIZE=3
X% history
X   28  rm /tmp/history
X   29  HISTSIZE=3
X   30  history
X
X
X
XIn zsh, if you say
X
X% >file
X
X
Xthe command cat is normally assumed:
X
X% >file
Xfoo!
X^D
X% cat file
Xfoo!
X
X
END_OF_FILE
  if test 49646 -ne `wc -c <'doc/intro.txt.01'`; then
    echo shar: \"'doc/intro.txt.01'\" unpacked with wrong size!
  fi
  # end of 'doc/intro.txt.01'
fi
if test -f 'help/autoload' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'help/autoload'\"
else
  echo shar: Extracting \"'help/autoload'\" \(274 characters\)
  sed "s/^X//" >'help/autoload' <<'END_OF_FILE'
X     autoload [ name ... ]
X          For each of the names (which are names  of  functions),
X          create a function marked undefined.  The fpath variable
X          will be searched to find the actual function definition
X          when the function is first referenced.
END_OF_FILE
  if test 274 -ne `wc -c <'help/autoload'`; then
    echo shar: \"'help/autoload'\" unpacked with wrong size!
  fi
  # end of 'help/autoload'
fi
if test -f 'src/Makefile.sample' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'src/Makefile.sample'\"
else
  echo shar: Extracting \"'src/Makefile.sample'\" \(1851 characters\)
  sed "s/^X//" >'src/Makefile.sample' <<'END_OF_FILE'
X#! /bin/make -f
X# Makefile for zsh
X# generated by buildzsh
X
XAUX=buildzsh
X
XSRC=builtin.c cond.c exec.c glob.c hist.c init.c jobs.c lex.c loop.c \
Xmath.c mem.c params.c parse.c subst.c table.c text.c utils.c watch.c \
Xzle_bindings.c zle_hist.c zle_main.c zle_misc.c zle_move.c zle_refresh.c \
Xzle_tricky.c zle_utils.c zle_vi.c zle_word.c
X
XHEADER=funcs.h zle.h zsh.h ztype.h
X
XPROTO=builtin.pro cond.pro exec.pro glob.pro hist.pro init.pro jobs.pro \
Xlex.pro loop.pro math.pro mem.pro params.pro parse.pro subst.pro table.pro \
Xtext.pro utils.pro watch.pro zle_bindings.pro zle_hist.pro zle_main.pro \
Xzle_misc.pro zle_move.pro zle_refresh.pro zle_tricky.pro zle_utils.pro \
Xzle_vi.pro zle_word.pro
X
XOBJS=builtin.o cond.o exec.o glob.o hist.o init.o jobs.o lex.o loop.o \
Xmath.o mem.o params.o parse.o subst.o table.o text.o utils.o watch.o \
Xzle_bindings.o zle_hist.o zle_main.o zle_misc.o zle_move.o zle_refresh.o \
Xzle_tricky.o zle_utils.o zle_vi.o zle_word.o
X
XBINDIR=/usr/local/bin
XMANDIR=/usr/local/man/man1
X
X# Debugging flags
XDFLAGS = # -DQDEBUG
X
X# For gcc 2.3.3
X# CC=gcc -fpcc-struct-return
X# CFLAGS= -O2 -g -Wall -Wno-implicit -Wno-parentheses -Wno-comment $(DFLAGS)
X
XCC=cc
XCFLAGS= -O
XLIBS= -ltermcap
X
XZSHPATH=zsh
X
X.SUFFIXES: .c .o .pro
X
X.c.o:
X    $(CC) $(CFLAGS) $(DFLAGS) -c $<
X
X.c.pro:
X    sed -n '/\/\*\*\/$$/{N;s/^\([^(]*\).*\/\*\*\/.\(.*\)/\1 DCLPROTO((\2))/p;}' $< | sed -e 's/;/,/g' -e 's/,))$$/));/' -e 's/(({))$$/((void));/' >$@
X
Xall: $(PROTO) $(ZSHPATH)
X
X$(ZSHPATH): $(OBJS)
X    $(CC) -o $(ZSHPATH) $(OBJS) $(LIBS) $(LFLAGS)
X
Xtags: /tmp
X    ctags *.[cy]
X
X# I hate this next line
X$(OBJS): config.h zsh.h zle.h signals.h ztype.h funcs.h
X
Xparams.o: version.h
X
Xclean:
X    rm -f *.o *.pro zsh core
X
Xcleanall:
X    rm -f *.o *.pro zsh core Makefile signals.h config.h
X
Xinstall: zsh
X    install -s -m 755 zsh $(BINDIR)
X    install -m 444 ../man/man1/zsh.1 $(MANDIR)
END_OF_FILE
  if test 1851 -ne `wc -c <'src/Makefile.sample'`; then
    echo shar: \"'src/Makefile.sample'\" unpacked with wrong size!
  fi
  # end of 'src/Makefile.sample'
fi
echo shar: End of archive 3 \(of 22\).
cp /dev/null ark3isdone
MISSING=""
for I in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 ; do
    if test ! -f ark${I}isdone ; then
    MISSING="${MISSING} ${I}"
    fi
done
if test "${MISSING}" = "" ; then
    echo You have unpacked all 22 archives.
    rm -f ark[1-9]isdone ark[1-9][0-9]isdone
else
    echo You still must unpack the following archives:
    echo "        " ${MISSING}
fi
exit 0

exit 0 # Just in case...