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 exe-
       cuted when this argument had been entered at the shell prompt. It does
       this by searching for an executable or script in the directories listed
       in the environment 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 ex-
           ample
           [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 func-
           tion 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 explic-
           ity 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--version,-v,-V[0m
           Print version information on standard  output  then  exit  success-
           fully.

       [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 `program-
       name' 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
       variable, 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)
