forktest(6) Svgalib User Manual forktest(6)
forktest - tests the vga_safety_fork() function.
This is a copy of the keytest(6) demo (look there). How-
ever, it uses vga_safety_fork(3) to start a background
process to restore the console in case the fore ground
process crashes. It removes all automatic restore func-
tions of svgalib. Thus, in case you kill this program with
kill(1) or <Ctrl>-C, only the background process will save
your system from being hosed up.
You can set a videomode to use by setting the environment
variable SVGALIB_DEFAULT_MODE to a number (see vgatest for
a list) or a string like G0x1x2 where you replace 0 with
desired x resolution, 1 with the desired y rez, and 2 with
the desired number of colors (2, 16, 256, 32K, 64K, 16M,
16M4). Again, only certain choices are available, see
vgatest for a list.
In case nothing is selected, G320x200x256 is choosen.
This demo is part of svgalib and can be found in the
demos/ subdirectory of the original svgalib distribution.
However, it is not installed in the system by default,
s.t. it is unclear where you can find it if your svgalib
was installed by some linux distribution. Even then, when
you have the demo on your system, you probably won't have
the sources s.t. it is only of limited use for you.
In case of any such problem, simply get an svgalib distri-
bution from the net. You even don't need to install it.
Just make in the demos/ subdirecty. As of this writing,
svgalib-1.2.12.tar.gz is the latest version and can be
retrieved by ftp from sunsite.unc.edu at
/pub/Linux/libs/graphics and tsx-11.mit.edu at
/pub/linux/sources/libs which will most probably be mir-
rored by a site close to you.
svgalib(7), vgagl(7), libvga(5),
vga_safety_fork(3), threed(6), accel(6), bg_test(6),
eventtest(6), fun(6), keytest(6), mousetest(6), scroll-
test(6), speedtest(6), spin(6), testaccel(6), testgl(6),
testlinear(6), vgatest(6), plane(6), wrapdemo(6)
This manual page was edited by Michael Weller <eowmob@exp-
math.uni-essen.de>. The exact source of the referenced
demo as well as of the original documentation is unknown.
It is very likely that both are at least to some extent
are due to Harm Hanemaayer <H.Hanemaayer@inter.nl.net>.
Occasionally this might be wrong. I hereby asked to be
excused by the original author and will happily accept any
additions or corrections to this first version of the
Svgalib 1.3.0 8 April 1998 1