Sponsored Content
Top Forums Programming Structure element accessing issue... Post 302186781 by Praveen_218 on Friday 18th of April 2008 03:32:05 AM
Old 04-18-2008
Thanks Jim for the reply ....

I got the Seg-11 even after conditional checking for NULL before actually accessing the struct object --:

if(a_var.idev_ptr != NULL)
{
/*Access to this is pretty fine*/
i_var = a_var.idev_ptr->p;

/*But accessing array element gives the segmentation fault*/
strncpy(str, a_var.idev_ptr->q, 10);
}


This is perticularly strange to me.

The actual code for which foo() is a dummy is written in a .so file and the library is supposed to provide me the *idev_ptr populated via some malloc() and user is supposed to free(idev_ptr).

Its starange.
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Copying a Directory Structure to a new structure

Hi all Is it possible to copy a structure of a directory only. e.g. I have a file with the following entries that is a result of a find :- /dir1/dir2/file.dbf /dir1/dir2/dir3/file1.dbf /dir1/file.dbf I want to copy these to a directory and keep the structure however starting at a new dir... (8 Replies)
Discussion started by: jhansrod
8 Replies

2. Shell Programming and Scripting

accessing my first element of array

Hello everyonel, I have an array set like so num=4 read name arr=name I go through while loop to assign different values to different array element from 1 to 4. when I try to access the FIRST element of the array I get the last one first. Like if I say ${arr} it will show the last element... (4 Replies)
Discussion started by: afadaghi
4 Replies

3. UNIX for Advanced & Expert Users

concurrency issue while Accessing Mail Box from shell script

Hi Bros, I am in a serious trouble with concurrency issue while using mailx. I have a shell script which reads all the emails of a unix user account and create a copy (another mbox for processing and archive purpose). This script works fine for 99.99% of the time but sometime it start creating... (2 Replies)
Discussion started by: Sumit_Fundoo
2 Replies

4. Programming

Search attributes in one structure using the values from another structure

Hello Groups I am trying to find out ways of comparing a value from a 'c' structure to a value in another 'C' structure. the 'C' structure can be a List or liked list as it contains lot many records. if we loop it in both the structures it is going to consume time. I am looking for a simple... (3 Replies)
Discussion started by: dhanamurthy
3 Replies

5. Web Development

Accessing a Perl CGI script, security issue

Hi Everybody, I was wondering if it was possible for someone to gain access to my Perl CGI scripts before they are interpreted by Perl (mod_perl on apache2) i.e. getting a hold of my raw scripts and not the html output? Let's say I use the DBI module where I have the hostname, user and... (2 Replies)
Discussion started by: z1dane
2 Replies

6. Shell Programming and Scripting

Issue faced while accessing data from files on different servers.

I have two log files of same name and structure which resides on different servers with ssh-keygen installed. I want to search for a list of strings available in an array on last 15 minutes logs of both files and calculate the total count of occurence of each string. Sample format of both file... (0 Replies)
Discussion started by: poweroflinux
0 Replies

7. Shell Programming and Scripting

Find if XML element has a matching required element

I want to check if every <Part> element has corresponding <Description> in this sample XML. ....<Lot Of XML> <Inv lineNumber="2"> <Item> ... (4 Replies)
Discussion started by: kchinnam
4 Replies

8. Shell Programming and Scripting

Print the row element till the next row element appear in a column

Hi all I have file with columns F3 pathway CPS F2 H2 H4 H5 H6 no pathway CMP H7 H8 H9 H10 My expected output is F3 pathway CPS F2 pathway CPS (10 Replies)
Discussion started by: Priyanka Chopra
10 Replies

9. Shell Programming and Scripting

Issue with accessing value inside while loop, outside it

Hi, GetName() { if then echo " Please enter the name: " read Name tempvar=0 while read line do if then tempvar=`expr $tempvar + 1` echo $tempvar ... (10 Replies)
Discussion started by: rituparna_gupta
10 Replies

10. Solaris

Solaris OS having issue accessing LUN from Qlogic swich

Hi Community, I am facing one issue related storage accessing from solaris 10 machine(M5000). it was working fine then we shifted to another site. the only change on that site is FC switch. The issue i am facing is from solaris machine i can able to see the LUN, it;s only a test lun of 30... (17 Replies)
Discussion started by: bentech4u
17 Replies
IEEE80211_GET_BUFFER(9) 				     Advanced driver interface					   IEEE80211_GET_BUFFER(9)

NAME
ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames SYNOPSIS
struct sk_buff * ieee80211_get_buffered_bc(struct ieee80211_hw * hw, struct ieee80211_vif * vif); ARGUMENTS
hw pointer as obtained from ieee80211_alloc_hw. vif struct ieee80211_vif pointer from the add_interface callback. DESCRIPTION
Function for accessing buffered broadcast and multicast frames. If hardware/firmware does not implement buffering of broadcast/multicast frames when power saving is used, 802.11 code buffers them in the host memory. The low-level driver uses this function to fetch next buffered frame. In most cases, this is used when generating beacon frame. RETURN
A pointer to the next buffered skb or NULL if no more buffered frames are available. NOTE
buffered frames are returned only after DTIM beacon frame was generated with ieee80211_beacon_get and the low-level driver must thus call ieee80211_beacon_get first. ieee80211_get_buffered_bc returns NULL if the previous generated beacon was not DTIM, so the low-level driver does not need to check for DTIM beacons separately and should be able to use common code for all beacons. AUTHOR
Johannes Berg <johannes@sipsolutions.net> Author. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 IEEE80211_GET_BUFFER(9)
All times are GMT -4. The time now is 10:24 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy