[sudo-users] Sudo failing to invoke password prompt with 1.7.8+ on AIX

[Albert Chin]

I've build sudo-1.7.7 and sudo-1.7.8 on AIX 6.1 as follows:
  $ cd /opt/build/china
  $ gtar zxf sudo-1.7.7.tar.gz
  $ cd sudo-1.7.7
  $ CONFIG_SHELL=/opt/fsw/bash42/bin/bash bash configure CC=xlc \
  CFLAGS="-O2 -qro -qroconst -qmaxmem=-1 -qarch=ppc" NROFFPROG=nroff \
  --disable-path-info --enable-shell-sets-home --enable-log-host \
  --with-logfac=auth --with-env-editor --with-ignore-dot \
  --without-lecture --with-logging=syslog --with-goodpri=notice \
  --with-badpri=alert --disable-sia --disable-root-mailer \
  --without-blibpath --sysconfdir=/opt/fsw/sudo177/etc \
  --prefix=/opt/fsw/sudo177
  ...
  $ gmake
  # gmake install

  $ gtar zxf sudo-1.7.8.tar.gz
  $ cd sudo-1.7.8
  $ CONFIG_SHELL=/opt/fsw/bash42/bin/bash bash configure CC=xlc \
  CFLAGS="-O2 -qro -qroconst -qmaxmem=-1 -qarch=ppc" NROFFPROG=nroff \
  --disable-path-info --enable-shell-sets-home --enable-log-host \
  --with-logfac=auth --with-env-editor --with-ignore-dot \
  --without-lecture --with-logging=syslog --with-goodpri=notice \
  --with-badpri=alert --disable-sia --disable-root-mailer \
  --without-blibpath --sysconfdir=/opt/fsw/sudo178/etc \
  --prefix=/opt/fsw/sudo178
  ...
  $ gmake
  # gmake install

  $ cat /opt/fsw/sudo177/etc/sudoers
root ALL=(ALL) ALL
china ALL = /usr/sbin/installp
  $ cat /opt/fsw/sudo178/etc/sudoers
root ALL=(ALL) ALL
china ALL = /usr/sbin/installp

  $ id
uid=1000(china) gid=1000(china)

  $ /opt/fsw/sudo177/bin/sudo -k
  $ /opt/fsw/sudo177/bin/sudo -l
Password: <enter password>
User china may run the following commands on this host:
    (root) /usr/sbin/installp

  $ /opt/fsw/sudo178/bin/sudo -k
  $ /opt/fsw/sudo178/bin/sudo -l
Sorry, try again.
Sorry, try again.
Sorry, try again.
sudo: 3 incorrect password attempts

I've also tried sudo-1.8.9p4 and received the same error. So,
something changed in 1.7.8 to cause this.

Note I have not configured with --with-pam.

-- 
albert chin (china at thewrittenword.com)