backq(9F) Kernel Functions for Drivers backq(9F)NAME
backq - get pointer to the queue behind the current queue
SYNOPSIS
#include <sys/stream.h>
queue_t *backq(queue_t *cq);
INTERFACE LEVEL
Architecture independent level 1 (DDI/DKI).
PARAMETERS
cq The pointer to the current queue. queue_t is an alias for the queue(9S) structure.
DESCRIPTION
The backq() function returns a pointer to the queue preceding cq (the current queue). If cq is a read queue, backq() returns a pointer to
the queue downstream from cq, unless it is the stream end. If cq is a write queue, backq() returns a pointer to the next queue upstream
from cq, unless it is the stream head.
RETURN VALUES
If successful, backq() returns a pointer to the queue preceding the current queue. Otherwise, it returns NULL.
CONTEXT
The backq() function can be called from user, interrupt, or kernel context.
SEE ALSO queue(9S)
Writing Device Drivers
STREAMS Programming Guide
SunOS 5.11 16 Jan 2006 backq(9F)
Check Out this Related Man Page
RD(9F) Kernel Functions for Drivers RD(9F)NAME
RD, rd - get pointer to the read queue
SYNOPSIS
#include <sys/stream.h>
#include <sys/ddi.h>
queue_t *RD(queue_t *q);
INTERFACE LEVEL
Architecture independent level 1 (DDI/DKI).
PARAMETERS
q Pointer to the write queue whose read queue is to be returned.
DESCRIPTION
The RD() function accepts a write queue pointer as an argument and returns a pointer to the read queue of the same module.
CAUTION: Make sure the argument to this function is a pointer to a write queue. RD() will not check for queue type, and a system panic
could result if it is not the right type.
RETURN VALUES
The pointer to the read queue.
CONTEXT
RD() can be called from user or interrupt context.
EXAMPLES
Example 1: Function page reference
See the qreply(9F) function page for an example of RD().
SEE ALSO qreply(9F), WR(9F)
Writing Device Drivers
STREAMS Programming Guide
SunOS 5.10 15 Nov 1991 RD(9F)
#Author : kkodava
#!/usr/bin/ksh
#Use of this program is You can findout the no of days & day of starting and ending dates
#usage no_of_days startdate<yyyymmdd> enddate<yyyymmdd>
syy=`echo $1|cut -c1-4`
smm=`echo $1|cut -c5-6`
sdd=`echo $1|cut -c7-8`
eyy=`echo $2|cut -c1-4`
emm=`echo... (1 Reply)
Hi,
I am writing a script to use awk to generate a set of cp commands from an input file abc.
file abc:
/data/a.dbf
/data/june/b.dbf
desired output:
cp -pr a.dbf /data/a.dbf
cp -pr b.dbf /data/june/b.dbf
script:
$ cat abc | awk '{ print "cp -pr '`basename $1`' " $1 }'
I tried to... (4 Replies)
hi
I've been searching all over the internet to simply do the following:
$tempfile = "/usr/school/tempfile.dat";
$myvar = param('add'); ###add is the variable assigned to a popup menu
`ls -l $myvar * >> $tempfile` ###I also tried `ls -l ${myvar}* >>$tempfile`
open(ADDLIST,... (6 Replies)
Not sure if that title is decent, but here we go. I'm running this string of commands:
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A quick question.
Can anyone tell me how to print a backquote character to a file in csh.
e.g. I need to print the below line to a file in csh. How to do it. Thanks.
`uuencode something something` (1 Reply)
Hello,
I have a few thousand files that contain backquotes (`) which were a typo in the program. Now I only want to delete these backquotes from these files.
In these cases I normally use the sed command in a script, but I can't seem to get sed to remove the backquotes. I tried several... (6 Replies)