I want to remove a line that has empty string at second field when I use cut with delimeter , like below
i got an error message for above command and I have no idea how to remove current line
hi ,
i am trying to compre two strings
if ] or if ]
when the length of var1 is small (around 300-400 char ) it works fine
but when it is large (around 900-1000 chars) it fails
is there any limitations for this type of comparison ??? (3 Replies)
hi ,
i am trying to compre two strings
if ] or if ]
when the length of var1 is small (around 300-400 char ) it works fine
but when it is large (around 900-1000 chars) it fails
is there any limitations for this type of comparison ??? (1 Reply)
Hello,
was just wondering how to compare strings in unix? I mean as in C there is a function strcmp() in string.h, is there any function in unix for that? I tried using
if
and all such variations but didn't succeed. Any help would be appreciated. Thanks in advance :) (9 Replies)
I have a folder a1 with the following files
sample_1.log
sample_2.log
sample_3.log
sample_4.log
sample_5.log
sample_6.log
In another folder there is a file b with the value 5
My script should take the value 5 ( file b), compare it with the files in folder a1, if file name contains... (1 Reply)
1. The problem statement, all variables and given/known data:
I have standard web server log file. It contains different columns (like IP address, request result code, request type etc) including a date column with the format .
I have developed a log analysis command line utility that displays... (1 Reply)
I Have a script which gets the status of oracle database and if the status is READ WRITE ..it should echo "db is up " else "db is down"
Here is the code
if
then
echo "db up"
else
echo "db down"
fi
done;
The script is giving me out put "db down" even thoug the value of... (6 Replies)
i need one help....
if i have a string like aaaaa,bbbbb,ccccc,aaaaa
How to to split the string and check howmany times aaaaa will be in that string?
Thanks (7 Replies)
I have a program to create a directory if not present. Here is the program.
FYI: Directory name format: YYYY_MM_DD
#!/bin/bash
date=`date +%Y_%m_%d`
presence=$(ls -lrt /TS_File/ | grep "$date" | awk '{print $9}')
if
then
mkdir /TS_File/$date
else
echo "Unable to Create... (5 Replies)
Hi,
I have the following requirement.
There will be following text/line in a file (eg: search-build.txt)
PRODUCT_VERSION="V:01.002.007.Build1234"
I need to update the incremental build number (eg here 007) every time I give a build through script. I am able to search the string and get... (4 Replies)
Why does this cause an infinite loop?
#!/bin/bash
while ]; do
echo "$(ipcs | awk '{print $2}')"
done
echo
exit 0
I have verified I eventually get Semaphore so it should break out of the while loop.
$ echo $(ipcs | awk '{print $2}')
Shared shmid 262145 294914... (6 Replies)
Discussion started by: cokedude
6 Replies
LEARN ABOUT MOJAVE
rmvq
rmvq(9F) Kernel Functions for Drivers rmvq(9F)NAME
rmvq - remove a message from a queue
SYNOPSIS
#include <sys/stream.h>
void rmvq(queue_t *q, mblk_t *mp);
INTERFACE LEVEL
Architecture independent level 1 (DDI/DKI).
PARAMETERS
q Queue containing the message to be removed.
mp Message to remove.
DESCRIPTION
rmvq() removes a message from a queue. A message can be removed from anywhere on a queue. To prevent modules and drivers from having to
deal with the internals of message linkage on a queue, either rmvq() or getq(9F) should be used to remove a message from a queue.
CONTEXT
rmvq() can be called from user or interrupt context.
EXAMPLES
This code fragment illustrates how one may flush one type of message from a queue. In this case, only M_PROTO T_DATA_IND messages are
flushed. For each message on the queue, if it is an M_PROTO message (line 8) of type T_DATA_IND (line 10), save a pointer to the next mes-
sage (line 11), remove the T_DATA_IND message (line 12) and free it (line 13). Continue with the next message in the list (line 19).
1 mblk_t *mp, *nmp;
2 queue_t *q;
3 union T_primitives *tp;
4
5 /* Insert code here to protect queue and message block */
6 mp = q->q_first;
7 while (mp) {
8 if (mp->b_datap->db_type == M_PROTO) {
9 tp = (union T_primitives *)mp->b_rptr;
10 if (tp->type == T_DATA_IND) {
11 nmp = mp->b_next;
12 rmvq(q, mp);
13 freemsg(mp);
14 mp = nmp;
15 } else {
16 mp = mp->b_next;
17 }
18 } else {
19 mp = mp->b_next;
20 }
21 }
22 /* End of region that must be protected */
When using rmvq(), you must ensure that the queue and the message block is not modified by another thread at the same time. You can achieve
this either by using STREAMS functions or by implementing your own locking.
SEE ALSO freemsg(9F), getq(9F), insq(9F)
Writing Device Drivers
STREAMS Programming Guide
WARNINGS
Make sure that the message mp is linked onto q to avoid a possible system panic.
SunOS 5.10 9 Jul 2001 rmvq(9F)