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FACE(6) 										  FACE(6)

       face - face files

       The  directory  /lib/face contains a hierarchy of images of people.  In that directory are
       subdirectories named by the sizes of the corresponding image files: 48x48x1 (48 by 48 pix-
       els,  one bit per pixel); 48x48x2 (48 by 48 pixels, two bits per pixel); 512x512x8 (512 by
       512 pixels, eight bits per pixel); 512x512x24 (512 by 512  pixels,  twenty-four	bits  per
       pixel  (3  times  8  bits per color)).  The large files serve no special purpose; they are
       stored either as bitmaps (see bitmap(6)) or as picture files (see picfile(9.6).	The small
       files are the `icons'  displayed by seemail (see mail(1)); their format is special.

       Icons  are stored as text, one line of the file to one scan line of display.  Each line is
       divided into 8-bit, 16-bit, or 32-bit big-endian words, stored as a  list  of  comma-sepa-
       rated hexadecimal C constants, such as:

	      0x9200, 0x1bb0, 0x003e,

       This  odd  format is historical and the programs that read it are somewhat forgiving about
       blanks and the need for commas.

       The files /lib/face/*/.dict hold a correspondence  between  users  at  machines	and  face
       files.  The format is

	      machine/user directory/file.ver

       The  machine  is  the domain name of the machine sending the message, and user the name of
       the user sending it, as recorded in /sys/log/mail.  The directory is a  further	subdirec-
       tory of (say) /lib/face/48x48x1, named by a single letter corresponding to the first char-
       acter of the user names.  The file is the name of the file, typically but not  always  the
       user name, and ver is a number to distinguish different images, for example to distinguish
       the image for Bill Gates from the image for Bill Joy, both of  which  might  otherwise  be
       called b/bill.  For example, Bill Gates might be represented by the line

	      microsoft.com/bill b/bill.1

       If multiple entries exist for a user in the various .dict files, seemail chooses the high-
       est pixel size less than or equal to that of the display on which it is running.

       Finally,  or  rather  firstly,  the  file  /lib/face/.machinelist  contains  a	list   of
       machine/domain  pairs,  one  per  line, to map any of a set of machines to a single domain
       name to be looked up in the .dict files.  The machine name may be a regular expression, so
       for example the entry

	      .*research.att.com    astro

       maps  any  of  the  machines  in  AT&T  Research into the shorthand name astro, which then
       appears as a domain name in the .dict files.

       mail(1), tweak(1), bitmap(6)

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