tzselect patch: remove dependency on ksh

[Peter Seebach]

This was done against the copy in glibc, the eglibc folks suggested I  
send it on to you as the upstream.

Basic synopsis:  This allows tzselect to be used on hosts (such as  
embedded systems) with only a POSIX shell.

--- glibc-2.8.orig/timezone/tzselect.ksh	2009-06-22 11:23:11.000000000  
-0700
+++ glibc-2.8/timezone/tzselect.sh	2009-06-22 11:52:26.000000000 -0700
@@ -1,27 +1,16 @@
-#! @KSH@
+#! @SH@

-# '@(#)tzselect.ksh	8.1'
+# '@(#)tzselect.sh	8.1'

  # Ask the user about the time zone, and output the resulting TZ  
value to stdout.
  # Interact with the user via stderr and stdin.

  # Contributed by Paul Eggert.

-# Porting notes:
-#
-# This script requires several features of the Korn shell.
-# If your host lacks the Korn shell,
-# you can use either of the following free programs instead:
-#
-#	<a href=ftp://ftp.gnu.org/pub/gnu/>
-#	Bourne-Again shell (bash)
-#	</a>
-#
-#	<a href=ftp://ftp.cs.mun.ca/pub/pdksh/pdksh.tar.gz>
-#	Public domain ksh
-#	</a>
-#
-# This script also uses several features of modern awk programs.
+# func_select allows this script to run on shells (such as busybox ash)
+# which lack the ksh "select" builtin.
+
+# This script uses several features of modern awk programs.
  # If your host lacks awk, or has an old awk that does not conform to  
Posix.2,
  # you can use either of the following free programs instead:
  #
@@ -33,6 +22,70 @@
  #	mawk
  #	</a>

+# Implement ksh-style select in POSIX shell
+
+# We need a mostly-portable echo-n.
+case `echo -n "foo\c"` in
+*n*c*)  func_echo_n() { echo "$*"; } ;;
+*n*)    func_echo_n() { echo "$*\c"; } ;;
+*)      func_echo_n() { echo -n "$*"; } ;;
+esac
+
+# Synopsis:  Replace "select foo in list" with "while func_select foo  
in list"
+# and this works just like ksh, so far as I know.
+func_select () {
+	func_select_args=0
+	if expr "$1" : "^[_a-zA-Z][_a-zA-Z0-9]*$" > /dev/null; then
+		func_select_var=$1
+	else
+		echo >&2 "func_select: '$1' is not a valid variable name."
+		return 1
+	fi
+	shift 1
+	case $1 in
+		in) shift 1;;
+		*) echo >&2 "func_select: usage: func_select var in ... (you must  
provide
+arguments)"; return 1;;
+	esac
+	case $# in
+		0) echo >&2 "func_select: usage: func_select var in ..."; return 1;;
+	esac
+	for func_select_arg
+	do
+		func_select_args=`expr $func_select_args + 1`
+		eval func_select_a_$func_select_args=\$func_select_arg
+	done
+	REPLY=""
+	while :
+	do
+		if test -z "$REPLY"; then
+			func_select_i=1
+			while test $func_select_i -le $func_select_args
+			do
+				eval echo "\"\$func_select_i) \$func_select_a_$func_select_i\""
+				func_select_i=`expr $func_select_i + 1`
+			done
+		fi
+		func_echo_n "${PS3-#? }" >&2
+		if read REPLY; then
+			if test -n "${REPLY}"; then
+				if expr "$REPLY" : '^[1-9][0-9]*$' > /dev/null; then
+					if test "$REPLY" -ge 1 && test "$REPLY" -le $func_select_args;  
then
+						eval $func_select_var=\$func_select_a_$REPLY
+					else
+						eval $func_select_var=
+					fi
+				else
+					eval $func_select_var=
+				fi
+				return 0
+			fi
+		else
+			eval $func_select_var=
+			return 1
+		fi
+	done
+}

  # Specify default values for environment variables if they are unset.
  : ${AWK=awk}
@@ -62,7 +115,7 @@


  # Work around a bug in bash 1.14.7 and earlier, where $PS3 is sent  
to stdout.
-case $(echo 1 | (select x in x; do break; done) 2>/dev/null) in
+case $(echo 1 | (while func_select x in x; do break; done) 2>/dev/ 
null) in
  ?*) PS3=
  esac

@@ -82,7 +135,7 @@

  	echo >&2 'Please select a continent or ocean.'

-	select continent in \
+	while func_select continent in \
  	    Africa \
  	    Americas \
  	    Antarctica \
@@ -162,7 +215,7 @@
  		case $countries in
  		*"$newline"*)
  			echo >&2 'Please select a country.'
-			select country in $countries
+			while func_select country in $countries
  			do
  			    case $country in
  			    '') echo >&2 'Please enter a number in range.';;
@@ -201,7 +254,7 @@
  		*"$newline"*)
  			echo >&2 'Please select one of the following' \
  				'time zone regions.'
-			select region in $regions
+			while func_select region in $regions
  			do
  				case $region in
  				'') echo >&2 'Please enter a number in range.';;
@@ -278,7 +331,7 @@
  	echo >&2 "Is the above information OK?"

  	ok=
-	select ok in Yes No
+	while func_select ok in Yes No
  	do
  	    case $ok in
  	    '') echo >&2 'Please enter 1 for Yes, or 2 for No.';;

-- 
Peter Seebach <peter.seebach at windriver.com>
Listen, get this.  Nobody with a good compiler needs to be justified.