src/roff/nroff/nroff.sh

   1 #!/bin/sh
   2 # Emulate nroff with groff.
   3
   4 prog="$0"
   5 # Default device.
   6 # First try the "locale charmap" command, because it's most reliable.
   7 # On systems where it doesn't exist, look at the environment variables.
   8 case "`locale charmap 2>/dev/null`" in
   9   UTF-8)
  10     T=-Tutf8 ;;
  11   ISO-8859-1)
  12     T=-Tlatin1 ;;
  13   IBM-1047)
  14     T=-Tcp1047 ;;
  15   *)
  16     case "${LC_ALL-${LC_CTYPE-${LANG}}}" in
  17       *.UTF-8)
  18         T=-Tutf8 ;;
  19       iso_8859_1 | *.ISO-8859-1)
  20         T=-Tlatin1 ;;
  21       *.IBM-1047)
  22         T=-Tcp1047 ;;
  23       *)
  24         case "$LESSCHARSET" in
  25           utf-8)
  26             T=-Tutf8 ;;
  27           latin1)
  28             T=-Tlatin1 ;;
  29           cp1047)
  30             T=-Tcp1047 ;;
  31           *)
  32             T=-Tascii ;;
  33           esac ;;
  34      esac ;;
  35 esac
  36 opts=
  37 safer=-S
  38
  39 for i; do
  40   case $1 in
  41     -h)
  42       opts="$opts -P-h" ;;
  43     -[eq] | -s*)
  44       # ignore these options
  45       ;;
  46     -[mrnoT])
  47       echo "$prog: option $1 requires an argument" >&2
  48       exit 1 ;;
  49     -i | -[mrno]*)
  50       opts="$opts $1" ;;
  51     -Tascii | -Tlatin1 | -Tutf8 | -Tcp1047)
  52       T=$1 ;;
  53     -T*)
  54       # ignore other devices
  55       ;;
  56     -S)
  57       # safer behaviour
  58       safer=-S ;;
  59     -U)
  60       # unsafe behaviour
  61       safer=-U ;;
  62     -u*)
  63       # Solaris 2.2 `man' uses -u0; ignore it,
  64       # since `less' and `more' can use the emboldening info.
  65       ;;
  66     --)
  67       shift
  68       break ;;
  69     -)
  70       break ;;
  71     -*)
  72       echo "$prog: invalid option $1" >&2
  73       exit 1 ;;
  74     *)
  75       break ;;
  76   esac
  77   shift
  78 done
  79
  80 # This shell script is intended for use with man, so warnings are
  81 # probably not wanted.  Also load nroff-style character definitions.
  82 exec groff $safer -Wall -mtty-char $T $opts ${1+"$@"}