01-07-2002
Experts Only! Hard Question Ahead!!!!
SunOS5.8 is a radical departure from SunOs4.X in many ways. one of the important differences is the handling of devices. Adding devices under SunOS4.x required a kernel reconfiguration, recompliation and reboot. Under SunOS5.X, this has changed with the ability to add some drivers on the fly. However, both systems still use the concept of major and minor numbers when dealing with devices.
What do major and minor numbers mean under both SunOS4.X and SunOS5.8?
Told ya it was tricky.... Any experts out there??
-Michelle
10 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
I know pipelined processors have issues with interupts.... but why? And does the architecture of the CPU affect the kind of software that can run on it?
If someone could help me out that would be awsome. My boss came to me with this question and I can't find anything on the web helping me out.... (1 Reply)
Discussion started by: Sparticus007
1 Replies
2. Shell Programming and Scripting
Given this one long stream of data (all one line):
<TransactionDetail><TransactionHeader><ErrorLogging>YES</ErrorLogging><HistoryLogging>YES</HistoryLogging><ErrorDetection>NO</ErrorD... (4 Replies)
Discussion started by: dfran1972
4 Replies
3. UNIX for Dummies Questions & Answers
I am curious about one thing.
Lets say I have a file file-a to which new generations are created on demand by simply archiving it (ex: file-a.tar.gz) and having the new one created with the same original filename file-a.
Now what I want to know is if I create a hard/soft link to file-a, what... (1 Reply)
Discussion started by: Browser_ice
1 Replies
4. AIX
Good day,
I have an rs/6000 server, model 7044-270. I bought a 2nd hard drive for it but im not sure its the right one. (fru:H13060) As you surely know, the 7044-270 hard drives are put in some sort of tray/carrier. There is a cable that will interface the HDD with the tray/carrier so the... (0 Replies)
Discussion started by: Netghost
0 Replies
5. UNIX for Dummies Questions & Answers
Hello guys.
Well, on this exercise i need the average "chargeAmount" per hour (for each hour).
with this code :
cat getusagesummarywrongmatch | grep -iv MOU2GRTObject | cut -d'|' -f4,14 | grep -i chargeamount | cut -d' ' -f2
http://img227.imageshack.us/img227/5889/65969235do0.jpg
i got... (2 Replies)
Discussion started by: EnioMarques
2 Replies
6. Shell Programming and Scripting
I am trying to exit this script by cd'ing into a particular directory.
#!/bin/bash
/opt/xxx/xxx/d2h $1
fname=$( /opt/xxx/xxx/d2h $1)
cd /opt/xxx1/xxx1
find . -name '*'$fname'*' -ls
cd /opt/xxx1/xxx1
Upon execution, it returns to my home directory (where I am running this script from.
... (3 Replies)
Discussion started by: BkontheShell718
3 Replies
7. UNIX for Advanced & Expert Users
I have a directory containing a series of files of the format:
A2008001231000.L2
I only care about the 6-8 digits, so the files are effectively:
?????---*.L2
I have files that range from ?????001*.L2 to ?????366*.L2
It should be noted these three digits represent the julian day of the... (2 Replies)
Discussion started by: msb65
2 Replies
8. Shell Programming and Scripting
dear coders,
i need some inspiration again...
there is something what i always wanted to know... how to code following:
value 1: __________
value 2: __________
important: when my "script" starts the display has to be cleared and two lines are shown (see above), the cursor has to be... (2 Replies)
Discussion started by: pseudocoder
2 Replies
9. Shell Programming and Scripting
I need a little help with sed. Basically, I need to parse out selections from the output of hddtemp so conky can display some hdd temps for me. I have hddtemp in daemon mode so A simple 'nc localhost 7634' displays the following:
$ nc localhost 7634... (3 Replies)
Discussion started by: audiophile
3 Replies
10. Shell Programming and Scripting
Hi guys
I am trying to perform a substitution using 'awk' command, but it fails.
I work in ksh. Here is my code:
$ line="F 18:30 10 23:00 ts1632back"
$ n="ts1632back"
$ m="18:45"
$ echo ${line} | nawk -v a=$n -v b=$m '{if ($5==a) $2=m; print }'
F 10 23:00 ts1632back
$It should've... (2 Replies)
Discussion started by: aoussenko
2 Replies
MKNOD(8) BSD System Manager's Manual MKNOD(8)
NAME
mknod -- make device special file
SYNOPSIS
mknod [-F format] name [c | b] major minor
mknod [-F format] name [c | b] major unit subunit
mknod name [c | b] number
mknod name w
DESCRIPTION
The mknod command creates device special files.
To make nodes manually, the required arguments are:
name Device name, for example ``sd'' for a SCSI disk on an HP300 or a ``pty'' for pseudo-devices.
b | c | w
Type of device. If the device is a block type device such as a tape or disk drive which needs both cooked and raw special files, the
type is b. Whiteout nodes are type w. All other devices are character type devices, such as terminal and pseudo devices, and are
type c.
major The major device number is an integer number which tells the kernel which device driver entry point to use.
minor The minor device number tells the kernel which one of several similar devices the node corresponds to; for example, it may be a spe-
cific serial port or pty.
unit and subunit
The unit and subunit numbers select a subset of a device; for example, the unit may specify a particular SCSI disk, and the subunit a
partition on that disk. (Currently this form of specification is only supported by the bsdos format, for compatibility with the
BSD/OS mknod(8).)
Device numbers for different operating systems may be packed in a different format. To create device nodes that may be used by such an oper-
ating system (e.g. in an exported file system used for netbooting), the -F option is used. The following formats are recognized: native,
386bsd, 4bsd, bsdos, freebsd, hpux, isc, linux, netbsd, osf1, sco, solaris, sunos, svr3, svr4 and ultrix.
Alternatively, a single opaque device number may be specified.
SEE ALSO
mkfifo(1), mkfifo(2), mknod(2)
HISTORY
A mknod command appeared in Version 6 AT&T UNIX. The -F option appeared in NetBSD 1.4.
NetBSD 1.4 September 11, 1998 NetBSD 1.4