Install
=======

You will need an ANSI C compiler (like gcc) to compile this package.

Just type `make', followed by `make install'.

History
=======

The main difference with version 1.0 by Paul Vixie is that this
version will not return directory names as being executables
and that by default it will expand a leading "./" and "~/" to
its full path on output.

The -all option has been added in example of a version of which
on Ultrix.  They use `-a' as option.

The --read-alias idea has been copied from a version of which by
Maarten Litmaath called `which-v6', he was using `-i' as option
which stands for `interactive'.

Manual page
===========

     which - shows the full path of (shell) commands.

[1mSYNOPSIS[0m
     [1mwhich [22m[options] [--] programname [...]

[1mDESCRIPTION[0m
     [1mWhich  [22mtakes  one or more arguments. For each of its arguments it prints to
     stdout the full path of the executables that would have been executed  when
     this argument had been entered at the shell prompt. It does this by search-
     ing  for  an executable or script in the directories listed in the environ-
     ment variable [1mPATH [22musing the same algorithm as [1mbash(1)[22m.

     This man page is generated from the file [4mwhich.texinfo[24m.

[1mOPTIONS[0m
     [1m--all[22m, [1m-a[0m
         Print all matching executables in [1mPATH[22m, not just the first.

     [1m--read-alias[22m, [1m-i[0m
         Read aliases from stdin, reporting matching ones  on  stdout.  This  is
         useful in combination with using an alias for which itself. For example
         [1malias which='alias | which -i'[22m.

     [1m--skip-alias[0m
         Ignore  option  `--read-alias',  if  any.  This  is useful to explicity
         search for normal binaries, while using the `--read-alias' option in an
         alias or function for which.

     [1m--read-functions[0m
         Read shell function definitions from stdin, reporting matching ones  on
         stdout.  This  is useful in combination with using a shell function for
         which itself.  For example:
         [1mwhich() { declare -f | which --read-functions "$@" }[0m
         export -f which

     [1m--skip-functions[0m
         Ignore option `--read-functions', if any. This is useful  to  explicity
         search  for  normal binaries, while using the `--read-functions' option
         in an alias or function for which.

     [1m--skip-dot[0m
         Skip directories in [1mPATH [22mthat start with a dot.

     [1m--skip-tilde[0m
         Skip directories in [1mPATH [22mthat start with a tilde and executables  which
         reside in the [1mHOME [22mdirectory.

     [1m--show-dot[0m
         If  a directory in [1mPATH [22mstarts with a dot and a matching executable was
         found for that path, then print "./programname" rather  than  the  full
         path.

     [1m--show-tilde[0m
         Output a tilde when a directory matches the [1mHOME [22mdirectory. This option
         is ignored when which is invoked as root.

     [1m--tty-only[0m
         Stop processing options on the right if not on tty.
     [1m--tty-only[0m
         Stop processing options on the right if not on tty.

     [1m--version,-v,-V[0m
         Print version information on standard output then exit successfully.

     [1m--help[0m
         Print usage information on standard output then exit successfully.

[1mRETURN VALUE[0m
     [1mWhich  [22mreturns  the number of failed arguments, or -1 when no `programname'
     was given.

[1mEXAMPLE[0m
     The recommended way to use this utility is by adding an alias (C shell)  or
     shell function (Bourne shell) for [1mwhich [22mlike the following:

     [ba]sh:

          which ()
          {
            (alias; declare -f) | /usr/bin/which --tty-only --read-alias --read-functions --show-tilde --show-dot "$@"
          }
          export -f which

     [t]csh:

          alias which 'alias | /usr/bin/which --tty-only --read-alias --show-dot --show-tilde'

     This  will  print  the  readable  ~/  and  ./ when starting which from your
     prompt, while still printing the full path when used from a script:

          > which q2
          ~/bin/q2
          > echo $(which q2)
          /home/carlo/bin/q2


[1mBUGS[0m
     The [1mHOME [22mdirectory is determined by looking for the [1mHOME [22menvironment  vari-
     able,  which  aborts when this variable doesn't exist.  [1mWhich [22mwill consider
     two equivalent directories to be different when one of them contains a path
     with a symbolic link.

[1mAUTHOR[0m
     Carlo Wood <carlo@gnu.org>

[1mSEE ALSO[0m
     [1mbash(1)[0m

                                                                        [4mWHICH[24m(1)
