term% cat index.txt CONFIG(5) File Formats Manual CONFIG(5)
NAME
config - system configuration template files
DESCRIPTION
These files are used as input by config(8). Except as noted, they are
kept in /usr/sys/conf.
Files names the source files that make up the kernel. Each line con‐
sists of a filename (relative to /usr/sys) followed by some magic
words. For example:
sys/acct.c standard
is a file used by any version of the system;
dev/uba.c standard device-driver
is also always used, and contains device register references (which may
require special compilation hacks);
dev/ju.c optional ju device-driver
is included only if the ju device is expected;
dev/ttyld.c optional tty pseudo-device
is included only if the tty pseudo-device is requested.
Devices describes possible device drivers, file system handlers, and
line disciplines; the information is used to generate handler dispatch
tables. It consists of lines with the following blank-separated
fields:
Type of handler: device for character devices, stream-device for
character stream devices, block-device for block devices, file-
system for file system handlers, line-discipline for line disci‐
pline handlers. If the type is preceded by the word `standard'
(e.g. standard block-device), the handler is always included;
otherwise, it is included only if requested.
Table index: major device number, filesystem type, or line dis‐
cipline number.
Driver name. Used in files and conf. Config writes a header
file name.h for each device; if that device is configured, NAME
is defined to be the number of devices of that type.
Entry point name. Used as a prefix for data structure and
driver entry points.
Entry points. For block devices, some of open, close, strategy,
dump, B_TAPE (the last puts the flag B_TAPE in the d_flags entry
in the block device switch); for character devices, open, close,
read, write, ioctl, reset. For stream devices and line disci‐
plines, info should be specified. For file system handlers,
put, get, free, updat, read, write, trunc, stat, nami, mount,
ioctl.
As a special case, lines beginning with `:' are copied intact to
conf.c. This can be used for hacks like
: int mem_no = 3; /* major device number of memory special
file */
Addenda to files and devices specific to a particular machine may be
kept in /usr/sys/machine/files and /usr/sys/machine/devices. The ad‐
denda are treated as if appended to the general files.
CONFIG(5)