.zsh/functions/termsupported

   1 # -*- mode:sh -*-
   2
   3 # termsupported function
   4 # Define a useful function to determine if the current value of TERM
   5 # is useful, or if it needs changing.  Used below.
   6 termsupported ()
   7 {
   8   # terminfo should have a file for this terminal type.
   9   if [[ -f "/usr/share/terminfo/$TERM[1]/$TERM" ]]
  10   then
  11     # If it's there, success.
  12     return 0
  13   else
  14     # With termcap, we have a monolithic terminal type listing.
  15     if [[ -f /etc/termcap ]]
  16     then
  17       # This sed script joins continued \
  18       # lines and then checks to see if this terminal name is listed.
  19       if [[ "`sed -n \
  20         -e '/^$/d' \
  21         -e '/^#/d' \
  22         -e 'h' \
  23         -e 's/^\\([^:\\\\]*\\)[:\\\\].*\$/|\\1|/' \
  24         -e '/|'$1'|/p' \
  25         -e 'g' \
  26         -e ':detail' \
  27         -e '/\\$/{' \
  28         -e 'n' \
  29         -e 'b detail' \
  30         -e '}' \
  31         < /etc/termcap`" = "" ]]
  32       then
  33         # Nothing matches, fail.
  34         return 1
  35       else
  36         # Found a matching entry, succeed.
  37         return 0
  38       fi
  39     else
  40       # If neither terminal capabilities system was found, fail.
  41       return 2
  42     fi
  43   fi
  44 }