modifying ls alias to be more *nix friendly and adding grep options

.zsh/aliases.zsh

@@ -7,4 +7,9 @@ alias macgen="openssl rand -hex 6 | sed 's/\(..\)/\1:/g;s/../00/;s/.$//' | tr '[
 alias quickpwgen="tr -cd '[:alnum:]' < /dev/urandom | fold -w30 | head -n1"
 alias mailstop="sudo /etc/init.d/postfix stop && sudo /etc/init.d/dovecot stop && sudo /etc/init.d/amavis stop && sudo /etc/init.d/mysql stop && sudo /etc/init.d/saslauthd stop && sudo /etc/init.d/spamassassin stop"
 alias mailstart="sudo /etc/init.d/postfix start && sudo /etc/init.d/dovecot start && sudo /etc/init.d/amavis start && sudo /etc/init.d/mysql start && sudo /etc/init.d/saslauthd start && sudo /etc/init.d/spamassassin start"
-alias ls="ls --color=auto"
+
+if [ "$DISABLE_LS_COLORS" != "true" ]
+then
+    # Find the option for using colors in ls, depending on the version: Linux or BSD
+    ls --color -d . &>/dev/null 2>&1 && alias ls='ls --color=tty' || alias ls='ls -G'
+fi

.zsh/exports.zsh

@@ -1,10 +1,13 @@
 #default apps
 export EDITOR="vim"
 export PAGER="most"
-#history stuff
+# history stuff
 # number of lines kept in history
 export HISTSIZE=1000
 # number of lines saved in the history after logout
 export SAVEHIST=1000
 # location of history
 export HISTFILE=~/.zhistory
+# grep options
+export GREP_OPTIONS='--color=auto'
+export GREP_COLOR='1;32'