Re: errno --> errno name ?

[Bruce Korb]

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 tries to run awk with
the $errno_list argument instead of just passing output through to it.
Hopeless.

ash:
> $ ash -x ./mk-err-names.sh
> ./mk-err-names.sh: 37: Syntax error: word unexpected (expecting ")")
      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 'address@hidden(/usr/include.*/errno\)@address@hidden' | 
\
     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.