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@windriver.com> Listen, get this. Nobody with a good compiler needs to be justified.