usr.bin/gzip/zmore

   1 #!/bin/sh -
   2 #
   3 # $NetBSD: zmore,v 1.5 2013/12/06 13:33:15 pettai Exp $
   4 #
   5 # $OpenBSD: zmore,v 1.6 2008/08/20 09:22:02 mpf Exp $
   6 #
   7 #-
   8 # Copyright (c) 2003 Todd C. Miller <Todd.Miller@courtesan.com>
   9 #
  10 # Permission to use, copy, modify, and distribute this software for any
  11 # purpose with or without fee is hereby granted, provided that the above
  12 # copyright notice and this permission notice appear in all copies.
  13 #
  14 # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  15 # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  16 # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  17 # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  18 # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  19 # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  20 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  21 #
  22 # Sponsored in part by the Defense Advanced Research Projects
  23 # Agency (DARPA) and Air Force Research Laboratory, Air Force
  24 # Materiel Command, USAF, under agreement number F39502-99-1-0512.
  25 #
  26 # $FreeBSD$
  27
  28 # Pull out any command line flags so we can pass them to more/less
  29 flags=
  30 while test $# -ne 0; do
  31         case "$1" in
  32                 --)
  33                         shift
  34                         break
  35                         ;;
  36                 -*)
  37                         flags="$flags $1"
  38                         shift
  39                         ;;
  40                 *)
  41                         break
  42                         ;;
  43         esac
  44 done
  45
  46 if [ `basename $0` = "zless" ] ; then
  47         pager=${PAGER-less}
  48 else
  49         pager=${PAGER-more}
  50 fi
  51
  52 # No files means read from stdin
  53 if [ $# -eq 0 ]; then
  54         gzip -cdfq 2>&1 | $pager $flags
  55         exit 0
  56 fi
  57
  58 oterm=`stty -g 2>/dev/null`
  59 while test $# -ne 0; do
  60         gzip -cdfq "$1" 2>&1 | $pager $flags
  61         prev="$1"
  62         shift
  63         if tty -s && test -n "$oterm" -a $# -gt 0; then
  64                 #echo -n "--More--(Next file: $1)"
  65                 echo -n "$prev (END) - Next: $1 "
  66                 trap "stty $oterm 2>/dev/null" 0 1 2 3 13 15
  67                 stty cbreak -echo 2>/dev/null
  68                 REPLY=`dd bs=1 count=1 2>/dev/null`
  69                 stty $oterm 2>/dev/null
  70                 trap - 0 1 2 3 13 15
  71                 echo
  72                 case "$REPLY" in
  73                         s)
  74                                 shift
  75                                 ;;
  76                         e|q)
  77                                 break
  78                                 ;;
  79                 esac
  80         fi
  81 done
  82 exit 0