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which(1)                  BSD General Commands Manual                 which(1)


NAME

     which -- locate a program file in the user's path


SYNOPSIS

     which [-as] program ...


DESCRIPTION

     The which utility takes a list of command names and searches the path for
     each executable file that would be run had these commands actually been
     invoked.

     The following options are available:

     -a      List all instances of executables found (instead of just the
             first one of each).

     -s      No output, just return 0 if any of the executables are found, or
             1 if none are found.

     Some shells may provide a builtin which command which is similar or iden-
     tical to this utility.  Consult the builtin(1) manual page.


SEE ALSO

     builtin(1), csh(1), find(1), locate(1), whereis(1)


HISTORY

     The which command first appeared in FreeBSD 2.1.


AUTHORS

     The which utility was originally written in Perl and was contributed by
     Wolfram Schneider <wosch@FreeBSD.org>.  The current version of which was
     rewritten in C by Daniel Papasian <dpapasia@andrew.cmu.edu>.

BSD                              June 21, 2002                             BSD

Mac OS X 10.6 - Generated Thu Sep 17 20:09:31 CDT 2009
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