1.\"	$OpenBSD: which.1,v 1.14 2003/06/10 09:12:12 jmc Exp $
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30.\"     from: @(#)which.1	6.3 (Berkeley) 4/23/91
31.\"
32.Dd February 21, 1997
33.Dt WHICH 1
34.Os
35.Sh NAME
36.Nm which
37.Nd "locate a program file (or files) in the path"
38.Sh SYNOPSIS
39.Nm which
40.Op Fl a
41.Ar name Op Ar ...
42.Sh DESCRIPTION
43.Nm
44takes a list of names and looks for the files which would be
45executed had these names been given as commands.
46Each argument is searched for along the user's path.
47.Pp
48If the
49.Fl a
50flag is given,
51.Nm
52will return a list of all matches instead of just the first match.
53.Pp
54The
55.Nm
56utility exits with one of the following values:
57.Pp
58.Bl -tag -width 4n -compact
59.It 0
60All names were successfully resolved.
61.It 1
62Some names were resolved but not all.
63.It 2
64No names were resolved.
65.It \-1
66A system error occurred.
67.El
68.Sh ENVIRONMENT
69The following environment variables affect the execution of
70.Nm which :
71.Bl -tag -width PATH
72.It Ev PATH
73A colon-separated list of directories in which to find executables.
74If
75.Ev PATH
76is not set, and the given name is not a fully qualified
77or relative pathname,
78.Nm
79will fail.
80.El
81.Sh DIAGNOSTICS
82A diagnostic is given if an executable file with the argument
83name was not found in the path.
84.Sh SEE ALSO
85.Xr csh 1 ,
86.Xr find 1 ,
87.Xr locate 1 ,
88.Xr sh 1 ,
89.Xr whereis 1 ,
90.Xr environ 7
91.Sh HISTORY
92A
93.Nm
94command appeared in
95.Bx 3.0 .
96.Sh CAVEATS
97The
98.Nm
99command formerly was a
100.Xr csh 1
101script and could expand aliases.
102.Xr csh 1
103now has a built-in
104.Nm
105command so this version is intended for use
106with other shells like
107.Xr sh 1 .
108