hwconfig(C)

hwconfig -- read hardware configuration information

Syntax

/etc/hwconfig [ -nlhcq ] [ -f file ] [ param ] [ param=val ] ...

Description

The hwconfig command returns the configuration information contained in the configuration string device /dev/string/cfg or in the file specified on the command line with the -f option. Using combinations of the remaining options, the user can view as much information as needed from the configuration string. The display format is as follows:

   device_name base+finish vec dma rest

where:

device_name: is the name of the device driver.
base+finish: are the starting and the finishing addresses of the driver working space.
vec: is the interrupt vector number in decimal.
dma: is the DMA channel number.
rest: is a possibly empty list of parameter=value pairs.

The default hwconfig display looks similar to this:

   name=fpu vec=13 dma=- type=80387
   name=serial base=0x3F8 offset=0x7 vec=4 dma=- unit=0 type=Standard nports=1
   name=floppy base=0x3F2 offset=0x5 vec=6 dma=2 unit=0 type=135ds18
   name=console vec=- dma=- unit=vga type=0 12 screens=68k
   name=adapter base=0x2000 offset=0xCDC vec=11 dma=- type=eiad ha=0 id=7 fts=std
   name=eisarom vec=- dma=- eisa (1.3.0)
   name=sme base=0x300 offset=0x1F vec=10 dma=- type=8216 addr=00 00 c0 a2 d5 6e
   name=tape vec=- dma=- type=S ha=0 id=2 lun=0 bus=0 ht=eiad
   name=disk vec=- dma=- type=S ha=0 id=0 lun=0 bus=0 ht=eiad
   name=Sdsk vec=- dma=- cyls=496 hds=64 secs=32 fts=sdb

The configuration string device /dev/string/cfg is written to by the boot program. Thus, the hwconfig report is up to date when the system is rebooted into either system maintenance or multiuser mode.

Options

-n: The device name is always printed out.
-l: The long format of the device configuration content, with a label for each entry, is used. This is the default.
-h: Use the short format, with headers instead of labels.
-c: Check for device conflicts, including I/O addresses, DMA channels, and interrupt vectors which are being used by more than one driver.
-q: Check quietly for device conflicts; display nothing. When both -c and -q are given, display conflicts only.
-f file: Use file as the input file instead of the default /dev/string/cfg.
param: Show all values of param throughout the configuration string device. param can be any valid system parameter. The current valid system parameters are: name, base, offset, vec, dma, unit, type, nports, hds, cyls, secs, and drvr.
param=val: Show only information from the line where param equals the value val.

The -n, -l and -h options are in increasing overriding power. That is, if -n and -l are both specified, -l is used. param on its own indicates a query for its corresponding value(s), whereas param=value indicates a matching <token,val> pair in the input file. -l is used by default if there are no queries and no explicit option.

Command-line queries, that is, those with parameters only, are always displayed in long format.

Exit values

hwconfig returns 0 for success, 1 for conflicts detected, 2 for invalid arguments.

Examples

hwconfig -f /usr/adm/hwconfig

The entire contents of the file /usr/adm/hwconfig are printed.

hwconfig base

All the values of the base parameter found in /dev/string/cfg are printed.

hwconfig -f conf base=300 vec=19

All entries in conf that match the base and vec values given are printed.

hwconfig name=floppy base

The name and value of base in /dev/string/cfg for the drivers with the name floppy are printed for all entries.

hwconfig -n base dma

The device name associated with the base and dma is displayed. For example,

name=scsi base=0x234 dma=4

hwconfig base dma vec=4

The base and dma values of all /dev/string/cfg entries with matching vec=4 are printed.

hwconfig -l base dma vec=4

Similar to hwconfig -l vec=4 except that base and dma values are printed first.

hwconfig -h

Everything is printed in the long format, with a header similar to the one shown at boot time. All queries are ignore, but matching is performed on token values. For example,

hwconfig -h vec=4 dma=1

prints in long format, with headers, all those entries with vec=4 and dma=1

hwconfig -ch

displays /dev/string/cfg in an easy-to-read tabular format and checks for device conflicts.

Limitations

Information about conflicts is purely advisory because hwconfig can only report about hardware devices which have been correctly recognized by a kernel driver.

/dev/string/cfg is normally readable by all users; however, the system administrator may change its permissions.

Files

/etc/hwconfig: program file
/usr/lib/hwconfig.awk: awk program which hwconfig uses
/dev/string/cfg: configuration string device

Standards conformance

hwconfig is not part of any currently supported standard; it is an extension of AT&T System V provided by The Santa Cruz Operation, Inc.