[PATCH] completion: chown, cpio: support user:group syntax only

i think this was inspired by a complaint on irc, but i've been sitting on it
for a few years

currently we handle . as a delimiter for chown and cpio, as in user.group.
this syntax has been deprecated/non-preferred for my entire life afaik. posix
says to use :. all bsd man pages for chown have said to use : since the '90s.
support for . has been disabled entirely in freebsd/darwin chown since the
early 2000s i think. gnu chown accepts it but it prints a warning message. the
man page on irix (special-cased in _chown) still mentioned . at the end but it
also supported :

anyway our trying to handle the . is annoying on systems that actually have
users/groups with dots in their names

rather than try to make it smarter i think it's ok to just stop supporting
that syntax

dana


diff --git a/Completion/Unix/Command/_chown b/Completion/Unix/Command/_chown
index dae0de86c..36db9c4d2 100644
--- a/Completion/Unix/Command/_chown
+++ b/Completion/Unix/Command/_chown
@@ -74,19 +74,13 @@ _arguments -C -s -S -0 $aopts "$args[@]" '*: :->files' && ret=0
 
 case $state in
   owner)
-    if [[ $service = chgrp ]] || compset -P '*[:.]'; then
+    if [[ $service = chgrp ]] || compset -P '*:'; then
       if (( EGID && $+commands[groups] && ! $+_comp_priv_prefix )); then  # except for sudo
        _wanted groups expl 'group' compadd -- $(groups) && return 0
       fi
       _groups && ret=0
     else
-      if compset -S '[.:]*'; then
-        suf=()
-      elif [[ $OSTYPE = irix* ]]; then
-	suf=( -qS '.' )
-      else
-	suf=( -qS ':' )
-      fi
+      compset -S ':*' || suf=( -qS: )
       _users "$suf[@]" && ret=0
     fi
   ;;
@@ -102,9 +96,9 @@ case $state in
     if [[ $service = chgrp ]]; then
       grp=${line[1]}
     else
-      usr=${line[1]%%[.:]*}
+      usr=${line[1]%%:*}
       usr=${${(M)usr:#[0-9]#}:-${userdirs[$usr]:+.$usr.}}
-      grp=${${(M)line[1]%%[.:]*}#?}
+      grp=${${(M)line[1]%%:*}#?}
     fi
     [[ -n $grp ]] && grp="${${(M)grp:#[0-9]#}:-.$grp.}"
     req=( ${usr:+\^u$usr} ${grp:+\^g$grp} )
diff --git a/Completion/Unix/Command/_cpio b/Completion/Unix/Command/_cpio
index 20f8c712d..6db4994d8 100644
--- a/Completion/Unix/Command/_cpio
+++ b/Completion/Unix/Command/_cpio
@@ -120,13 +120,12 @@ if [[ $state = afile ]]; then
 	'users:user name:_users -qS@' && ret=0
   fi
 elif [[ $state = user ]]; then
-  if compset -P '*[:.]'; then
+  if compset -P '*:'; then
     _groups && ret=0
   else
-    local suf=.
-    [[ $OSTYPE = (solaris|hpux)* ]] && suf=:
-    compset -S '.*' && unset suf
-    _users -S "$suf" -q && ret=0
+    local suf
+    compset -S ':*' || suf=( -qS: )
+    _users $suf && ret=0
   fi
 fi