add useful completions to default profile

bash/profile

@@ -18,7 +18,7 @@ export TMOUT=3600
 #   environment permissions
 umask 022
 ulimit -c 16384
-if expr $- : ".*i.*" >/dev/null; then
+if [ ".$PS1" != . ]; then
     mesg y
 fi
 
@@ -33,6 +33,49 @@ export TMPDIR=/tmp
 export TEMPDIR=$TMPDIR
 export BLOCKSIZE=1024
 
+#   turn on extended globbing
+shopt -s extglob no_empty_cmd_completion
+
+#   make directory commands see only directories
+complete -d cd mkdir rmdir pushd
+
+#   make file commands see only (their) files
+complete -f cat less more ln strip
+complete -f -X '*.bz2' bzip2
+complete -f -X '!*.bz2' bunzip2
+complete -f -X '!*.zip' unzip
+complete -f -X '*.gz' gzip
+complete -f -X '*.Z' compress
+complete -f -X '!*.+(Z|gz|tgz|Gz)' gunzip zcat zmore
+complete -f -X '!*.Z' uncompress zmore zcat
+complete -f -X '!*.+(gif|jpg|jpeg|GIF|JPG|bmp)' xv display
+complete -f -X '!*.+(ps|PS|ps.gz)' gv gs mgv
+complete -f -X '!*.+(dvi|DVI)' dvips xdvi
+complete -f -X '!*.+(pdf|PDF)' acroread xpdf
+complete -f -X '!*.texi*' makeinfo texi2dvi texi2html
+complete -f -X '!*.+(tex|TEX)' tex latex
+complete -f -X '!*.+(c|cc|C|h|hh|H)' cc gcc
+
+#   make signal and job commands see only signals/jobs
+complete -A signal kill -P '%'
+complete -A stopped -P '%' bg
+complete -j -P '%' fg jobs
+
+#   make user/group commands see only users/groups
+complete -u passwd su finger
+complete -u passwd
+
+#   make network commands see only hostnames
+complete -A hostname ssh rsh telnet rlogin ftp ping host traceroute nslookup dig
+
+#   make internal commands see only their possibilities
+complete -v export local readonly unset
+complete -A setopt set
+complete -A shopt shopt
+complete -A helptopic help
+complete -a unalias
+complete -A binding bind
+
 #   convinient root priviledge switching
 root () {
     if [ $# -eq 0 -o ".$1" = ".-i" ]; then