sunos man page for which

which(1)							   User Commands							  which(1)

NAME
       which - locate a command; display its pathname or alias

SYNOPSIS
       which [filename...]

DESCRIPTION
       which  takes  a	list  of  names  and  looks for the files which would be executed had these names been given as commands. Each argument is
       expanded if it is aliased, and searched for along the user's path. Both aliases and path are taken from the user's .cshrc file.

FILES
       ~/.cshrc 	       source of aliases and path values

       /usr/bin/which

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

SEE ALSO
       csh(1), attributes(5)

DIAGNOSTICS
       A diagnostic is given for names which are aliased to more than a single word, or if an executable file with the argument name was not found
       in the path.

NOTES
       which is not a shell built-in command; it is the UNIX command, /usr/bin/which

BUGS
       Only  aliases  and paths from ~/.cshrc are used; importing from the current environment is not attempted. Must be executed by csh(1), since
       only csh knows about aliases.

       To compensate for ~/.cshrc files in which aliases depend upon the prompt variable being set, which sets	this  variable	to  NULL.  If  the
       ~/.cshrc produces output or prompts for input when prompt is set, which may produce some strange results.

SunOS 5.10							    26 Sep 1992 							  which(1)