mkfifo/mkfifo.1

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  37 .\"     @(#)mkfifo.1    8.2 (Berkeley) 1/5/94
  38 .\"
  39 .Dd January 5, 1994
  40 .Dt MKFIFO 1
  41 .Os BSD 4.4
  42 .Sh NAME
  43 .Nm mkfifo
  44 .Nd make fifos
  45 .Sh SYNOPSIS
  46 .Nm mkfifo
  47 .Op Fl m Ar mode
  48 .Ar fifo_name  ...
  49 .Sh DESCRIPTION
  50 .Nm mkfifo
  51 creates the fifos requested, in the order specified.
  52 By default,
  53 the resulting fifos have mode
  54 .Li \&0666
  55 (rw-rw-rw-), limited by the current
  56 .Xr umask 2 .
  57 .Pp
  58 The options are as follows:
  59 .Bl -tag -width Ds
  60 .It Fl m
  61 Set the file permission bits of newly-created fifos to
  62 .Ar mode ,
  63 without respect to the current umask.
  64 .Pp
  65 The mode is specified as in
  66 .Xr chmod 1 .
  67 In symbolic mode strings, the
  68 .Dq +
  69 and
  70 .Dq -
  71 operators are interpreted relative to an assumed initial mode of
  72 .Dq a=rw
  73 .El
  74 .Pp
  75 .Nm mkfifo
  76 requires write permission in the parent directory.
  77 .Pp
  78 .Nm mkfifo
  79 exits with 0 if successful, and with >0 if an error occurred.
  80 .Sh LEGACY DESCRIPTION
  81 In legacy mode, the fifo's file permission bits
  82 are always limited by the current umask.
  83 .Pp
  84 For more information about legacy mode, see
  85 .Xr compat 5 .
  86 .Sh SEE ALSO
  87 .Xr mkdir 1 ,
  88 .Xr rm 1 ,
  89 .Xr umask 1 ,
  90 .Xr mkfifo 2 ,
  91 .Xr umask 2 ,
  92 .Xr compat 5 ,
  93 .Xr mknod 8
  94 .Sh STANDARDS
  95 The
  96 .Nm mkfifo
  97 utility is expected to be
  98 .St -p1003.2-92
  99 compliant.
 100 .Sh HISTORY
 101 .Nm mkfifo
 102 command appeared in
 103 .Bx 4.4 .