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uxterm revision 1.1.1.4 
      1 #!/bin/sh
      2 # $XTermId: uxterm,v 1.29 2020/03/07 15:52:31 tom Exp $
      3 # -----------------------------------------------------------------------------
      4 # this file is part of xterm
      5 #
      6 # Copyright 2001-2020,2023 by Thomas E. Dickey
      7 # 
      8 #                         All Rights Reserved
      9 # 
     10 # Permission is hereby granted, free of charge, to any person obtaining a
     11 # copy of this software and associated documentation files (the
     12 # "Software"), to deal in the Software without restriction, including
     13 # without limitation the rights to use, copy, modify, merge, publish,
     14 # distribute, sublicense, and/or sell copies of the Software, and to
     15 # permit persons to whom the Software is furnished to do so, subject to
     16 # the following conditions:
     17 # 
     18 # The above copyright notice and this permission notice shall be included
     19 # in all copies or substantial portions of the Software.
     20 # 
     21 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
     22 # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     23 # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
     24 # IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY
     25 # CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
     26 # TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
     27 # SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     28 # 
     29 # Except as contained in this notice, the name(s) of the above copyright
     30 # holders shall not be used in advertising or otherwise to promote the
     31 # sale, use or other dealings in this Software without prior written
     32 # authorization.
     33 # -----------------------------------------------------------------------------
     34 #
     35 # wrapper script to setup xterm with UTF-8 locale
     36 
     37 whoami=uxterm
     38 
     39 : "${XTERM_PROGRAM=xterm}"
     40 
     41 # Check if there is a workable locale program.  If there is not, we will read
     42 # something via the standard error.  Ignore whatever is written to the
     43 # standard output.
     44 locale=`sh -c "LC_ALL=C LC_CTYPE=C LANG=C locale >/dev/null" 2>&1`
     45 found=no
     46 
     47 # Check for -version and -help options, to provide a simple return without
     48 # requiring the program to create a window:
     49 if test $# = 1
     50 then
     51 	case $1 in
     52 	-v|-ver*|-h|-he*)
     53 		$XTERM_PROGRAM "$@"
     54 		exit $?
     55 		;;
     56 	esac
     57 fi
     58 
     59 # Check environment variables that might be used for encoding:
     60 for name in LC_ALL LC_CTYPE LANG
     61 do
     62 	eval 'value=$'$name
     63 	if test -n "$value" ; then
     64 		case $value in
     65 		*.utf8|*.UTF8|*.utf-8|*.UTF-8)
     66 			found=yes
     67 			;;
     68 		*.utf8@*|*.UTF8@*|*.utf-8@*|*.UTF-8@*)
     69 			found=yes
     70 			;;
     71 		*)
     72 			value=""	# ignore
     73 			continue	# keep trying
     74 			;;
     75 		esac
     76 		break
     77 	fi
     78 done
     79 
     80 # If we didn't find one that used UTF-8, modify the safest one.  Not everyone
     81 # has a UTF-8 locale installed (and there appears to be no trivial/portable way
     82 # to determine whether it is, from a shell script).  We could check if the
     83 # user's shell does not reset unknown locale specifiers, but not all shells do.
     84 if test $found != yes ; then
     85 	if test -n "$value" ; then
     86 		value=`echo "${value}" |sed -e 's/[.@].*//'`.UTF-8
     87 	else
     88 		expect=
     89 		for name in LC_ALL LC_CTYPE LANG
     90 		do
     91 			eval 'check=$'$name
     92 			if test -n "$check"
     93 			then
     94 				expect=`echo "$check" | sed -e 's/[.@].*$//'`
     95 				test -n "$expect" && break
     96 			fi
     97 		done
     98 		if test -z "$expect" ; then
     99 			name="LC_CTYPE"
    100 			expect="en_US"
    101 		fi
    102 		value=`locale -a | awk -v "expect=$expect" 'BEGIN {
    103 			exact=""
    104 			maybe=""
    105 		}
    106 		/[.](utf|UTF)[-]?8(@.*)?$/ {
    107 			if (index($0, "C.") == 1) {
    108 				maybe=$0;
    109 			}
    110 			if (index($0, expect ".") == 1) {
    111 				exact=$0;
    112 			}
    113 		}
    114 		END {
    115 			if ( exact != "" ) {
    116 				print exact;
    117 			} else if ( maybe != "" ) {
    118 				print maybe;
    119 			} else {
    120 				print "";
    121 			}
    122 		}
    123 		'`
    124 		test -z "$value" && value="en_US.UTF-8"
    125 	fi
    126 	eval save=\$${name}
    127 	eval ${name}=${value}
    128 	eval export ${name}
    129 	if test -z "$locale" ; then
    130 		# The 'locale' program tries to do a sanity check.
    131 		check=`sh -c "locale >/dev/null" 2>&1`
    132 		if test -n "$check" ; then
    133 			eval ${name}="${save}"
    134 			eval export ${name}
    135 
    136 			echo "$whoami tried to use locale $value by setting \$$name" >&2
    137 			xmessage -file - <<EOF
    138 $whoami tried unsuccessfully to use locale $value
    139 by setting \$$name to "${value}".
    140 EOF
    141 			exit 1
    142 		fi
    143 	fi
    144 fi
    145 
    146 # for testing:
    147 #test -f ./xterm && XTERM_PROGRAM=./xterm
    148 
    149 exec "$XTERM_PROGRAM" -class UXTerm -u8 "$@"
    150