time/time.1

   1 .\"     $NetBSD: time.1,v 1.7 1997/10/20 03:28:20 lukem Exp $
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  34 .\"     @(#)time.1      8.1 (Berkeley) 6/6/93
  35 .\"
  36 .Dd June 6, 1993
  37 .Dt TIME 1
  38 .Os
  39 .Sh NAME
  40 .Nm time
  41 .Nd time command execution
  42 .Sh SYNOPSIS
  43 .Nm
  44 .Op Fl lp
  45 .Ar utility
  46 .Sh DESCRIPTION
  47 The
  48 .Nm
  49 utility
  50 executes and
  51 times
  52 .Ar utility .
  53 After the
  54 .Ar utility
  55 finishes,
  56 .Nm
  57 writes the total time elapsed,
  58 the time consumed by system overhead,
  59 and the time used to execute
  60 .Ar utility
  61 to the standard error stream.
  62 Times are reported in seconds.
  63 .Pp
  64 Available options:
  65 .Bl -tag -width Ds
  66 .It Fl l
  67 The contents of the
  68 .Em rusage
  69 structure are printed.
  70 .It Fl p
  71 The output is formatted as specified by
  72 .St -p1003.2-92 .
  73 .El
  74 .Pp
  75 Some shells may provide a builtin
  76 .Nm
  77 command which is similar or identical to this utility.
  78 Consult the
  79 .Xr builtin 1
  80 manual page.
  81 .Sh DIAGNOSTICS
  82 The
  83 .Nm
  84 utility shall exit with one of the following values:
  85 .Bl -tag -width indent
  86 .It 1-125
  87 An error occurred in the
  88 .Nm
  89 utility.
  90 .It 126
  91 The
  92 .Ar utility
  93 was found but could not be invoked.
  94 .It 127
  95 The
  96 .Ar utility
  97 could not be found.
  98 .El
  99 .Pp
 100 Otherwise, the exit status of
 101 .Nm
 102 shall be that of
 103 .Ar utility .
 104 .Sh SEE ALSO
 105 .Xr builtin 1 ,
 106 .Xr csh 1 ,
 107 .Xr getrusage 2
 108 .Sh FILES
 109 .Bl -tag -width /usr/include/sys/resource.h -compact
 110 .It Pa /usr/include/sys/resource.h
 111 .El
 112 .Sh STANDARDS
 113 The
 114 .Nm
 115 utility conforms to
 116 .St -p1003.2-92 .
 117 .Sh BUGS
 118 The granularity of seconds on microprocessors is crude and
 119 can result in times being reported for CPU usage which are too large by
 120 a second.