FACE(6) FACE(6) NAME face - face files DESCRIPTION The directories /usr/$user/lib/face and /lib/face contain a hierarchy of images of people. In those directories are subdirectories named by the sizes of the corresponding image files: 48x48x1 (48 by 48 pixels, one bit per pixel); 48x48x2 (48 by 48 pixels, two (grey) bits per pixel); 48x48x4 (48 by 48 pixels, four (grey) bits per pixel); 48x48x8 (48 by 48 pixels, eight (color-mapped) bits per pixel); 512x512x8 (512 by 512 pixels, eight (color-mapped) 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 as images (see image(6)). The small files are the `icons' displayed by faces and seemail (see faces(1)); for depths less than 4, their format is special. One- and two-bit deep 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-separated 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 sub- directory of (say) /lib/face/48x48x1, named by a single let- ter corresponding to the first character 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 repre- sented by the line microsoft.com/bill b/bill.1 If multiple entries exist for a user in the various .dict files, faces chooses the highest pixel size less than or equal to that of the display on which it is running. Page 1 Plan 9 (printed 12/4/24) FACE(6) FACE(6) 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\.bell-labs\.com astro maps any of the machines in Bell Labs Research into the shorthand name astro, which then appears as a domain name in the .dict files. SEE ALSO mail(1), tweak(1), image(6) Page 2 Plan 9 (printed 12/4/24)