Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

datab(9s) [opensolaris man page]

datab(9S)						    Data Structures for Drivers 						 datab(9S)

NAME
datab, dblk - STREAMS message data structure SYNOPSIS
#include <sys/stream.h> INTERFACE LEVEL
Architecture independent level 1 (DDI/DKI). DESCRIPTION
The datab structure describes the data of a STREAMS message. The actual data contained in a STREAMS message is stored in a data buffer pointed to by this structure. A msgb (message block) structure includes a field that points to a datab structure. Because a data block can have more than one message block pointing to it at one time, the db_ref member keeps track of a data block's ref- erences, preventing it from being deallocated until all message blocks are finished with it. STRUCTURE MEMBERS
unsigned char *db_base; /* first byte of buffer */ unsigned char *db_lim; /* last byte (+1) of buffer */ unsigned char db_ref; /* # of message pointers to this data */ unsigned char db_type; /* message type */ A datab structure is defined as type dblk_t. SEE ALSO
free_rtn(9S), msgb(9S) Writing Device Drivers STREAMS Programming Guide SunOS 5.11 24 Oct 2003 datab(9S)

Check Out this Related Man Page

msgb(9S)						    Data Structures for Drivers 						  msgb(9S)

NAME
msgb, mblk - STREAMS message block structure SYNOPSIS
#include <sys/stream.h> INTERFACE LEVEL
Architecture independent level 1 (DDI/DKI) DESCRIPTION
A STREAMS message is made up of one or more message blocks, referenced by a pointer to a msgb structure. The b_next and b_prev pointers are used to link messages together on a QUEUE. The b_cont pointer links message blocks together when a message consists of more than one block. Each msgb structure also includes a pointer to a datab(9S) structure, the data block (which contains pointers to the actual data of the message), and the type of the message. STRUCTURE MEMBERS
struct msgb *b_next; /* next message on queue */ struct msgb *b_prev; /* previous message on queue */ struct msgb *b_cont; /* next message block */ unsigned char *b_rptr; /* 1st unread data byte of buffer */ unsigned char *b_wptr; /* 1st unwritten data byte of buffer */ struct datab *b_datap; /* pointer to data block */ unsigned char b_band; /* message priority */ unsigned short b_flag; /* used by stream head */ Valid flags are as follows: MSGMARK Last byte of message is marked. MSGDELIM Message is delimited. The msgb structure is defined as type mblk_t. SEE ALSO
datab(9S) Writing Device Drivers STREAMS Programming Guide SunOS 5.11 11 Apr 1991 msgb(9S)
Man Page

14 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

trying to create a virtual database..

:cool: I like Vibhory2 like the idea of tapping into the kernel.. although not as indepth as he/she... i want to create a virtual databse of a few ma chines with connectivity and defiinte knowledge to create it.. I havebeen working on the project for a year now.. ! before unix (1 year exactly) i... (20 Replies)
Discussion started by: moxxx68
20 Replies

2. Shell Programming and Scripting

How to COnnect to Oracle database from UNIX Box

I am trying to connect to Oracle Databse from UNIX box using sqlplus command. But i get sqplus not found message. $ sqlplus sqlplus: not found I have searched in forums and all are suggesting to set environment varaibles...can somebody tell me what variables to set and how to set.and the... (12 Replies)
Discussion started by: angelarosh
12 Replies

3. UNIX for Dummies Questions & Answers

Shell scripting+connect to oracle database+spooling

Hi! Everyone I am new to the shell scripting basically.I have been asked to create a shell script that connect to a oracle database to read data from a particular schema then spool it into a csv file then email to customer. Can anybody let me know how to go about that. I have create... (14 Replies)
Discussion started by: Mr Mo
14 Replies

4. UNIX for Dummies Questions & Answers

data is seen as NULL after loading into database

hello, when I load a data from text file all the values become NULL in the table. Please help me with this problem. Thanks sheen (15 Replies)
Discussion started by: sheen
15 Replies

5. UNIX for Advanced & Expert Users

Flat file "database"

I'm wondering about the best way to store large amounts of sorted data, sorted by date/time, in a manner to allow fast retrieval of ranges of dates. Deletion isn't necessary. A database hardly seems ideal, since they're not optimized for sorted data, and allow things I don't need like the... (18 Replies)
Discussion started by: Corona688
18 Replies

6. AIX

ORACLE Database running slow on AIX ( nmon / topas )

Hello, How can I know if ORACLE Database is running slow due to Memory or due to processing power ? I have only Oracle Database running on a P4 with 4GB RAM. Could anyone suggest any tools which can help me determine exactly if it is memory issue or processor issue. (43 Replies)
Discussion started by: filosophizer
43 Replies

7. Shell Programming and Scripting

Korn shell program to parse CSV text file and insert values into Oracle database

Enclosed is comma separated text file. I need to write a korn shell program that will parse the text file and insert the values into Oracle database. I need to write the korn shell program on Red Hat Enterprise Linux server. Oracle database is 10g. (15 Replies)
Discussion started by: shellguy
15 Replies

8. Programming

Create a database in C

Hey, I have this basic server thing going on and I can't seem to allocate memory correctly and I can't access the memory after I allocated it. I was hoping people might suggest methods of doing this. I was thinking of using the socket file descriptor to reference the users. (14 Replies)
Discussion started by: Errigour
14 Replies

9. Shell Programming and Scripting

Mailx recipient from mysql database

Dear All, Can I make Mailx to read recipient address from a mysql database? I already tried emailing with bash script: SUBJECT="TEST" export EMAIL_ADDRESS=`mysql -uroot -pabcde smsd -e "SELECT email FROM recipient"` mysql -uroot -pabcde smsd -e "SELECT ID, SenderName, Body FROM inbox" |... (14 Replies)
Discussion started by: jazzyzha
14 Replies

10. Shell Programming and Scripting

Intelligent Script to Insert Records in Database Table

Hello All Members, I am new to this forum and to the shell scripting. I want to write a shell script to do the following: Scenario: I have a pipe delimited .txt file with multiple fields in it. The very first row of the file contains the name of the column which resembles the name of the... (18 Replies)
Discussion started by: chetanojha
18 Replies

11. Shell Programming and Scripting

Parse log file to insert into database

I have a log file that's created daily by this command: sar -u 300 288 >> /var/log/usage/$(date "+%Y-%m-%d")_$(hostname)_cpu.log It that contains data like this: Linux 3.16.0-4-amd64 (myhostname) 08/15/2015 _x86_64_ (1 CPU) 11:34:17 PM CPU %user %nice ... (12 Replies)
Discussion started by: unplugme71
12 Replies

12. Post Here to Contact Site Administrators and Moderators

Www.UNIX.com is slow today ???

Hi, Just wanting to know if there is any issues today with the site. Initially I thought it is my internet connection or computer but regardless which one I use, the site has been slow and it is also not showing with the right fonts etc. I've been trying for the last 12+ hours and it's always been... (21 Replies)
Discussion started by: newbie_01
21 Replies

13. UNIX for Beginners Questions & Answers

Shmem problem installing Oracle 12 C on Ubuntu 18.04

Hi, I'm a junior programmer. This is my first post here, please excuse me if that's not the correct place :) For days now I've been trying to install Oracle DB 12c R2 on Ubuntu 18.04. I'm at my wits' end. The software itself installs fine and a Listener can be started but I can't start... (15 Replies)
Discussion started by: Marika
15 Replies

14. What is on Your Mind?

MySQL Performance Problems

Just restarted MySQL a few times. There seems to be a problem with MySQL performance because one table (our man page table) is too large and I need to move that table to a new database and out of the main forums DB. That table is over 7 GB, bigger than the rest of the DB combined: ... (14 Replies)
Discussion started by: Neo
14 Replies

Featured Tech Videos