validp=t
case "$thing" in
*"$nl"*) validp=nil ;;
- *) if ! expr >/dev/null "$thing" : "$ckpat\$"; then validp=nil; fi ;;
+ *) if ! expr >/dev/null "Q$thing" : "Q$ckpat\$"; then validp=nil; fi ;;
esac
case $validp in
nil) echo >&2 "$quis: bad $ckwhat \`$thing'"; exit 1 ;;
## Regular expressions for validating input.
R_IDENTCHARS="A-Za-z0-9_"
-R_WORDCHARS="-$R_IDENTCHARS!%@+="
+R_GOODPUNCT="!%@+="
+R_WORDCHARS="-$R_IDENTCHARS$R_GOODPUNCT"
R_IDENT="[$R_IDENTCHARS][$R_IDENTCHARS]*"
R_WORD="[$R_WORDCHARS][$R_WORDCHARS]*"
+R_ACLCHARS="][$R_IDENTCHARS$R_GOODPUNCT*?:.#"
R_WORDSEQ="[$R_WORDCHARS[:space:]][$R_WORDCHARS[:space:]]*"
+R_ACL="[$R_ACLCHARS[:space:]-][$R_ACLCHARS[:space:]-]*"
R_NUMERIC='\(\([1-9][0-9]*\)\{0,1\}0\{0,1\}\)'
R_LABEL="\($R_WORD\(/$R_WORD\)*\)"
R_LINE=".*"
nub_hash t $R_WORD
nubid_hash t $R_WORD
nub_random_bytes t $R_NUMERIC
+acl_encrypt t $R_ACL
+acl_decrypt t $R_ACL
+acl_sign t $R_ACL
+acl_verify t $R_ACL
+acl_info t $R_ACL
EOF
readprops () {