apply/apply.1

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  34 .\"     @(#)apply.1     8.2 (Berkeley) 4/4/94
  35 .\"
  36 .Dd April 4, 1994
  37 .Dt APPLY 1
  38 .Os BSD 4.2
  39 .Sh NAME
  40 .Nm apply
  41 .Nd apply a command to a set of arguments
  42 .Sh SYNOPSIS
  43 .Nm
  44 .Op Fl a Ns Ar c
  45 .Op Fl Ns Ar #
  46 .Ar command argument ...
  47 .Sh DESCRIPTION
  48 .Nm
  49 runs the named
  50 .Ar command
  51 on each
  52 argument
  53 .Ar argument
  54 in turn.
  55 .Pp
  56 Character sequences of the form
  57 .Dq Li \&%d
  58 in
  59 .Ar command ,
  60 where
  61 .Dq Li d
  62 is a digit from 1 to 9, are replaced by the
  63 .Li d Ns \'th
  64 following unused
  65 .Ar argument .
  66 In this case, the largest digit number of arguments are discarded for
  67 each execution of
  68 .Ar command .
  69 .Pp
  70 The options are as follows:
  71 .Bl -tag -width "-ac"
  72 .It Fl Ns Ar #
  73 Normally arguments are taken singly; the optional number
  74 .Fl #
  75 specifies the number of arguments to be passed to
  76 .Ar command .
  77 If the number is zero,
  78 .Ar command
  79 is run, without arguments, once for each
  80 .Ar argument .
  81 .Pp
  82 If any sequences of
  83 .Dq Li \&%d
  84 occur in command, the
  85 .Fl #
  86 option is ignored.
  87 .It Fl a Ns Ar c
  88 The use of the character
  89 .Dq Li %
  90 as a magic character may be changed with the
  91 .Fl a
  92 option.
  93 .El
  94 .Sh ENVIRONMENT VARIABLES
  95 The following environment variable affects the execution of
  96 .Nm
  97 :
  98 .Bl -tag -width SHELL
  99 .It Ev SHELL
 100 Pathname of shell to use.
 101 If this variable is not defined, the Bourne shell is used.
 102 .El
 103 .Sh EXAMPLES
 104 .Bl -tag -width apply -compact
 105 .It Li "apply echo a*"
 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 Files
 119 .Bl -tag -width /bin/sh -compact
 120 .It Pa /bin/sh
 121 Default shell
 122 .El
 123 .Sh AUTHOR
 124 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 '' .
 131 .Sh HISTORY
 132 The
 133 .Nm
 134 command appeared in
 135 .Bx 4.2 .