Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

getrbuf(9f) [redhat man page]

getrbuf(9F)						   Kernel Functions for Drivers 					       getrbuf(9F)

NAME
getrbuf - get a raw buffer header SYNOPSIS
#include <sys/buf.h> #include <sys/kmem.h> #include <sys/ddi.h> struct buf *getrbuf(int sleepflag); INTERFACE LEVEL
Architecture independent level 1 (DDI/DKI). PARAMETERS
sleepflag Indicates whether driver should sleep for free space. DESCRIPTION
getrbuf() allocates the space for a buffer header to the caller. It is used in cases where a block driver is performing raw (character interface) I/O and needs to set up a buffer header that is not associated with the buffer cache. getrbuf() calls kmem_alloc(9F) to perform the memory allocation. kmem_alloc()requires the information included in the sleepflag argument. If sleepflag is set to KM_SLEEP, the driver may sleep until the space is freed up. If sleepflag is set to KM_NOSLEEP, the driver will not sleep. In either case, a pointer to the allocated space is returned or NULL to indicate that no space was available. RETURN VALUES
getrbuf() returns a pointer to the allocated buffer header, or NULL if no space is available. CONTEXT
getrbuf() can be called from user or interrupt context. (Drivers must not allow getrbuf() to sleep if called from an interrupt routine.) SEE ALSO
bioinit(9F), freerbuf(9F), kmem_alloc(9F), kmem_free(9F) Writing Device Drivers SunOS 5.10 20 Nov 1996 getrbuf(9F)

Check Out this Related Man Page

getrbuf(9F)						   Kernel Functions for Drivers 					       getrbuf(9F)

NAME
getrbuf - get a raw buffer header SYNOPSIS
#include <sys/buf.h> #include <sys/kmem.h> #include <sys/ddi.h> struct buf *getrbuf(int sleepflag); INTERFACE LEVEL
Architecture independent level 1 (DDI/DKI). PARAMETERS
sleepflag Indicates whether driver should sleep for free space. DESCRIPTION
getrbuf() allocates the space for a buffer header to the caller. It is used in cases where a block driver is performing raw (character interface) I/O and needs to set up a buffer header that is not associated with the buffer cache. getrbuf() calls kmem_alloc(9F) to perform the memory allocation. kmem_alloc()requires the information included in the sleepflag argument. If sleepflag is set to KM_SLEEP, the driver may sleep until the space is freed up. If sleepflag is set to KM_NOSLEEP, the driver will not sleep. In either case, a pointer to the allocated space is returned or NULL to indicate that no space was available. RETURN VALUES
getrbuf() returns a pointer to the allocated buffer header, or NULL if no space is available. CONTEXT
getrbuf() can be called from user or interrupt context. (Drivers must not allow getrbuf() to sleep if called from an interrupt routine.) SEE ALSO
bioinit(9F), freerbuf(9F), kmem_alloc(9F), kmem_free(9F) Writing Device Drivers SunOS 5.10 20 Nov 1996 getrbuf(9F)
Man Page

11 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Make all words begin with capital letter?

I need to use bash to convert sentences where all words start with a small letter into one where all words start with a capital letter. So that a string like: are utilities ready for hurricane sandy becomes: Are Utilities Ready For Hurricane Sandy (10 Replies)
Discussion started by: locoroco
10 Replies

2. UNIX for Dummies Questions & Answers

How to capture ^x,^y via bash script?

Hi I am new to this forum. Any please help me to capture ctrl x and ctrl y via a bash script. and please tell me how to clear the prompt via bash script BR Ramukumar M (4 Replies)
Discussion started by: ramukumar
4 Replies

3. Red Hat

Create an unconfigured VMware host from a template that is set to do firstboot --reconfig

I have an Oracle Linux 7.1 vsphere host built. It's be preconfigured with our security configurations. What I would like to do is unconfigure this host. Then set the host to do firstboot --reconfigure. how do I do that using /etc/sysconfig/firstboot? I've tried setting ... (10 Replies)
Discussion started by: os2mac
10 Replies

4. Shell Programming and Scripting

Retrieving previous command in a script

i know from the command line, the symbol $_ is used to get the last command that was run. however, id like to replicate this within a script. meaning, how do i do something like this: #!/bin/sh ps -ef | egrep talling StoreThisLastCommandA=$_ awk '/error/ {print $3}' /tmp/test... (5 Replies)
Discussion started by: SkySmart
5 Replies

5. UNIX for Advanced & Expert Users

Tar Command

hi folks, how to using tar with exclude directory and compress it using tar.Z i only know how to exclude dir only with this command below: tar -cvf /varios/restore/test.tar -X excludefile.txt /jfma/test1/ how to compress it using 1 command? Thanx Please use CODE tags as... (6 Replies)
Discussion started by: only
6 Replies

6. UNIX for Advanced & Expert Users

CentOS7 restoring file capabilities

Quite an obscure question I think. We have a rebuild process for remote sites that allows us to PXE rebuild a till (actually a PC with a touch screen and various fancy bits) running CentOS. The current CentOS5 tills work just fine with a tar image restore and some personalisation. Sadly,... (4 Replies)
Discussion started by: rbatte1
4 Replies

7. Docker

Docker learning Phase-I

Hello All, I had recently learnt a bit of Docker(which provides containerization process). Here are some of my learning points from it. Let us start first with very basic question: What is Docker: Docker is a platform for sysadmins and developers to DEPLOY, DEVELOP and RUN applications ... (7 Replies)
Discussion started by: RavinderSingh13
7 Replies

8. UNIX for Advanced & Expert Users

Issue with "rsh" on RedHat

Hi Folks, I feel that I should be posting this in the Unix for Dummies Forum and will probably wish I'd created an account and done just that - but here goes anyway. I have two identical servers both Dell R430's both running RedHat Enterprise Server 7.4 and the same kernel, both have the same... (16 Replies)
Discussion started by: gull04
16 Replies

9. UNIX for Beginners Questions & Answers

Package

Hi, What is installation package and how to create it? When we run: in AIX: installp package1 or in Linux rpm -ivh mypackage What is package1 or mypackage in the abov examples and how to create them and deploy them? I hope my question is clear enough. Thank you (2 Replies)
Discussion started by: big123456
2 Replies

10. UNIX for Advanced & Expert Users

Shopt -s histappend

What is the point of this? Whenever I close my shell it appends to the history file without adding this. I have never seen it overwrite my history file. # When the shell exits, append to the history file instead of overwriting it shopt -s histappend (3 Replies)
Discussion started by: cokedude
3 Replies

11. Shell Programming and Scripting

[TIP] Processing YAML files with yq

After the success of the jq - tool for parsing and manipulating JSON-Data someone wrote a tool called yq, which aims to be the same for YAML, what jq is for JSON. Seems to work fine. I'll definitely give it a chance in future. Example YAML-File: --- !ruby/object:Puppet::Node::Facts ... (1 Reply)
Discussion started by: stomp
1 Replies

Featured Tech Videos