usr.bin/gzip/zmore

   1 #!/bin/sh -
   2 #
   3 # $NetBSD: zmore,v 1.2 2003/12/28 12:43:43 wiz Exp $
   4 # $OpenBSD: zmore,v 1.4 2003/07/29 07:42:45 otto Exp $
   5 #
   6 # Copyright (c) 2003 Todd C. Miller <Todd.Miller@courtesan.com>
   7 #
   8 # Permission to use, copy, modify, and distribute this software for any
   9 # purpose with or without fee is hereby granted, provided that the above
  10 # copyright notice and this permission notice appear in all copies.
  11 #
  12 # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  13 # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  14 # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  15 # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  16 # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  17 # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  18 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  19 #
  20 # Sponsored in part by the Defense Advanced Research Projects
  21 # Agency (DARPA) and Air Force Research Laboratory, Air Force
  22 # Materiel Command, USAF, under agreement number F39502-99-1-0512.
  23 #
  24
  25 # Pull out any command line flags so we can pass them to more/less
  26 flags=
  27 while test $# -ne 0; do
  28         case "$1" in
  29                 --)
  30                         shift
  31                         break
  32                         ;;
  33                 -*)
  34                         flags="$flags $1"
  35                         shift
  36                         ;;
  37                 *)
  38                         break
  39                         ;;
  40         esac
  41 done
  42
  43 pager=${PAGER-more}
  44
  45 # No files means read from stdin
  46 if [ $# -eq 0 ]; then
  47         gzip -cdfq 2>&1 | $pager $flags
  48         exit 0
  49 fi
  50
  51 oterm=`stty -g 2>/dev/null`
  52 while test $# -ne 0; do
  53         gzip -cdfq "$1" 2>&1 | $pager $flags
  54         prev="$1"
  55         shift
  56         if tty -s && test -n "$oterm" -a $# -gt 0; then
  57                 #echo -n "--More--(Next file: $1)"
  58                 echo -n "$prev (END) - Next: $1 "
  59                 trap "stty $oterm 2>/dev/null" 0 1 2 3 13 15
  60                 stty cbreak -echo 2>/dev/null
  61                 REPLY=`dd bs=1 count=1 2>/dev/null`
  62                 stty $oterm 2>/dev/null
  63                 trap - 0 1 2 3 13 15
  64                 echo
  65                 case "$REPLY" in
  66                         s)
  67                                 shift
  68                                 ;;
  69                         e|q)
  70                                 break
  71                                 ;;
  72                 esac
  73         fi
  74 done
  75 exit 0