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30 .\" @(#)apply.1 8.2 (Berkeley) 4/4/94
31 .\"
32 .Dd April 4, 1994
33 .Dt APPLY 1
34 .Os
35 .Sh NAME
36 .Nm apply
37 .Nd apply a command to a set of arguments
38 .Sh SYNOPSIS
39 .Nm
40 .Op Fl a Ns Ar c
41 .Op Fl Ns Ar #
42 .Ar command argument ...
43 .Sh DESCRIPTION
44 .Nm
45 runs the named
46 .Ar command
47 on each
48 argument
49 .Ar argument
50 in turn.
51 .Pp
52 Character sequences of the form
53 .Dq Li \&%d
54 in
55 .Ar command ,
56 where
57 .Dq Li d
58 is a digit from 1 to 9, are replaced by the
59 .Li d Ns \'th
60 following unused
61 .Ar argument .
62 In this case, the largest digit number of arguments are discarded for
63 each execution of
64 .Ar command .
65 .Pp
66 The options are as follows:
67 .Bl -tag -width "-ac"
68 .It Fl Ns Ar #
69 Normally arguments are taken singly; the optional number
70 .Fl #
71 specifies the number of arguments to be passed to
72 .Ar command .
73 If the number is zero,
74 .Ar command
75 is run, without arguments, once for each
76 .Ar argument .
77 .Pp
78 If any sequences of
79 .Dq Li \&%d
80 occur in command, the
81 .Fl #
82 option is ignored.
83 .It Fl a Ns Ar c
84 The use of the character
85 .Dq Li %
86 as a magic character may be changed with the
87 .Fl a
88 option.
89 .El
90 .Sh ENVIRONMENT
91 The following environment variable affects the execution of
92 .Nm :
93 .Bl -tag -width SHELL
94 .It Ev SHELL
95 Pathname of shell to use.
96 If this variable is not defined, the Bourne shell is used.
97 .El
98 .Sh FILES
99 .Bl -tag -width /bin/sh -compact
100 .It Pa /bin/sh
101 Default shell
102 .El
103 .Sh EXAMPLES
104 .Bl -tag -width apply -compact
105 .It Li "apply echo *"
106 is similar to
107 .Xr ls 1 ;
108 .It Li "apply \-2 cmp a1 b1 a2 b2 a3 b3"
109 compares the `a' files to the `b' files;
110 .It Li "apply \-0 who 1 2 3 4 5"
111 runs
112 .Xr who 1
113 5 times; and
114 .It Li "apply \'ln %1 /usr/joe\'" *
115 links all files in the current directory to the directory
116 .Pa /usr/joe .
117 .El
118 .Sh HISTORY
119 The
120 .Nm
121 command appeared in
122 .Bx 4.2 .
123 .Sh AUTHORS
124 .An Rob Pike
125 .Sh BUGS
126 Shell metacharacters in
127 .Ar command
128 may have bizarre effects; it is best to enclose complicated
129 commands in single quotes
130 .Pq '' .