usr.bin/gzip/zmore

   1 #!/bin/sh -
   2 #
   3 # $NetBSD: zmore,v 1.4 2013/11/12 21:58:37 pettai Exp $
   4 #
   5 # $OpenBSD: zmore,v 1.6 2008/08/20 09:22:02 mpf Exp $
   6 #
   7 # Copyright (c) 2003 Todd C. Miller <Todd.Miller@courtesan.com>
   8 #
   9 # Permission to use, copy, modify, and distribute this software for any
  10 # purpose with or without fee is hereby granted, provided that the above
  11 # copyright notice and this permission notice appear in all copies.
  12 #
  13 # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  14 # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  15 # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  16 # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  17 # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  18 # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  19 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  20 #
  21 # Sponsored in part by the Defense Advanced Research Projects
  22 # Agency (DARPA) and Air Force Research Laboratory, Air Force
  23 # Materiel Command, USAF, under agreement number F39502-99-1-0512.
  24 #
  25
  26 # Pull out any command line flags so we can pass them to more/less
  27 flags=
  28 while test $# -ne 0; do
  29         case "$1" in
  30                 --)
  31                         shift
  32                         break
  33                         ;;
  34                 -*)
  35                         flags="$flags $1"
  36                         shift
  37                         ;;
  38                 *)
  39                         break
  40                         ;;
  41         esac
  42 done
  43
  44 if [ `basename $0` == "zless" ] ; then
  45         pager=${PAGER-less}
  46 else
  47         pager=${PAGER-more}
  48 fi
  49
  50 # No files means read from stdin
  51 if [ $# -eq 0 ]; then
  52         gzip -cdfq 2>&1 | ${PAGER-more} $flags
  53         exit 0
  54 fi
  55
  56 oterm=`stty -g 2>/dev/null`
  57 while test $# -ne 0; do
  58         gzip -cdfq "$1" 2>&1 | ${PAGER-more} $flags
  59         prev="$1"
  60         shift
  61         if tty -s && test -n "$oterm" -a $# -gt 0; then
  62                 #echo -n "--More--(Next file: $1)"
  63                 echo -n "$prev (END) - Next: $1 "
  64                 trap "stty $oterm 2>/dev/null" 0 1 2 3 13 15
  65                 stty cbreak -echo 2>/dev/null
  66                 REPLY=`dd bs=1 count=1 2>/dev/null`
  67                 stty $oterm 2>/dev/null
  68                 trap - 0 1 2 3 13 15
  69                 echo
  70                 case "$REPLY" in
  71                         s)
  72                                 shift
  73                                 ;;
  74                         e|q)
  75                                 break
  76                                 ;;
  77                 esac
  78         fi
  79 done
  80 exit 0