Hi Bruce.
On Friday 05 August 2011, Bruce Korb wrote:
> On 08/04/11 17:39, Bruno Haible wrote:
> > Hi Bruce,
> >
> >> I fixed up the "mk" script to be more portable
> >
> > Indeed, that looks like most portability problems have been eliminated.
> >
> >> tho I haven't tried it on Solaris' /bin/sh.
> >> Probably won't work. I don't have access.
> >
> > You can also test it with 'zsh', 'ksh', 'ash', and 'dash' on a glibc system.
> > If it works with these shells, it will likely also pass with /bin/sh on
> > various systems.
>
> zsh stumbles on this:
>
> egrep -h "$grep_expr" $errno_list | \
> sed "$sed_cmd" | \
> awk '{ print $1 " " $2 }' | \
> sort -u -n -k2 > ${tmpd}/sorted.txt
>
> so it is not Bourne-enough to count.
>
It's not by default; you just have to tell it explicitly to behave more
bourne-like. This is how it is done by the autoconf-generated configure
scripts (note that this code will also force bash and some Korn shells
to behave more "posixly"):
# Be more Bourne compatible
DUALCASE=1; export DUALCASE # for MKS sh
if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then :
emulate sh
NULLCMD=:
# Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which
# is contrary to our usage. Disable this feature.
alias -g '${1+"$@"}'='"$@"'
setopt NO_GLOB_SUBST
else
case `(set -o) 2>/dev/null` in *posix*) set -o posix ;; esac
fi
> It tries to run awk with
> the $errno_list argument instead of just passing output through to it.
> Hopeless.
>
Huh? What it the precise error message?
> ash:
> > $ ash -x ./mk-err-names.sh
> > ./mk-err-names.sh: 37: Syntax error: word unexpected (expecting ")")
>
Which version of ash? It works ok on my Debian box with dash 0.5.5.1 and
dash 0.5.2.
> 1 #! /bin/sh
> 2
> 3 init() {
> 4 tmpd=`mktemp -d ${TMPDIR:-/tmp}/err-names-XXXXXX`
> 5 test -d "${tmpd}" || {
> 6 tmpd=${TMPDIR:-/tmp}/err-names-$$
> 7 rm -rf ${tmpd}
> 8 mkdir ${tmpd}
> 9 }
> 10 tmpf=${tmpd}/temp.c
> 11 trap "rm -rf ${tmpd}" EXIT
> 12 echo '#include <errno.h>' > ${tmpf}
> 13
> 14 test -z "$CC" && {
> 15 CC=`command -v gcc 2>/dev/null`
> 16 test -x "$CC" || CC=`command -v cc`
> 17 }
> 18
> 19 errno_list=`
> 20 $CC -E ${tmpf} | \
> 21 sed -n -e 's/\.h[^-_a-zA-Z0-9/].*/.h/' \
> 22 -e 's@.*\(/usr/include.*/errno\)@\1@p' | \
> 23 sort -u `
> 24
> 25 grep_expr='^[ ]*#[ ]*define[ ]+E[A-Z_0-9]+[
> ]*[0-9]'
> 26 sed_cmd='s/^[ ]*#[ ]*define[ ]*//'
> 27
> 28 egrep -h "$grep_expr" $errno_list | \
> 29 sed "$sed_cmd" | \
> 30 awk '{ print $1 " " $2 }' | \
> 31 sort -u -n -k2 > ${tmpd}/sorted.txt
> 32 }
> 33
> 34 compute_limits() {
> 35 max_val=`sed -n '$s/^[A-Z_0-9]*[ ]*//p' ${tmpd}/sorted.txt`
> 36 max_width=0
> 37 last_val=-1
> 38 offset=0
>
> Not very Bourne-like either. The others work. It seems I have 'em all.
> Even Solaris' /bin/sh. I still have access to one at U of Utah. It works.
>
Regards,
Stefano
