There has been another thread as lorcan said and this seems to be only a continuation of the above thread in a new post.
Please continue to post your question in the same thread so that it would be easier to follow up rather than starting a new thread for the same question.
Assuming I have understood your requirement try this,
combined header and trailer is available followed by that
header is available
all the records are displayed
trailer record is not displayed
If this is not what you had asked for, let us know
I have a file in which email messages are stored in. Every email is separated by by a ^Z character (Control-Z).
I need to extract all emails after the 65,00th one to another file and delete them from the original file.
Any suggests on accomplishing this? (2 Replies)
I'm debugging a ksh script written by someone else that does the following:
It runs a command and redirects stdout to a file called dberror that already exists using ">". This command fails with the following error:
The file access permissions do not allow the specified action. dberror:... (1 Reply)
Hello,
I'm trying the solve the following problem.
I have a file which I intend to use as a csv called master.csv
The columns are separated by commas.
I want to change the text on a specific row in either column 3,4,5 or 6 from xxx to yyy depending upon if column 1 matches a specified pattern.... (3 Replies)
ENVIROMENT
Linux: Fedora Core release 1 (Yarrow)
iPlanet: iPlanet-WebServer-Enterprise/6.0SP1
Log Path: /usr/iplanet/servers/https-company/logs
I have iPlanet log rotation enabled rotating files on a daily basis.
The rotated logs are NOT compressed & are taking up too much space.
I... (7 Replies)
Hello All,
I had just a question about my Bash Script I'm currently writing.
The script I have writes some text to a output file. After I write to the output file I send the file to another server to do
some stuff with it.
After the file sends in the script, I don't need the output/txt... (4 Replies)
I have 2 TXT files with with 8 columns in them(tab separated). First file has 2000 entries whereas 2nd file has 300 entries.
The first file has ALL the lines of second file. Now I need to remove those 300 lines (which are in both files) from first file so that first file's line count become... (2 Replies)
I have ssh password less auth enable & script does the job well as well
#/bin/bash
for i in `cat ip`
do
scp /etc/resolv.conf root@$ip
done
But I need to take backup of the file i will overwrite .. is there any simple way ?
Kindly respond (5 Replies)
Hi Folks,
I am a novice and need to build a script in bash. I have 2 text files data.txt file is big file, column 2 is the we need to search and delete in the output. The filter file contains the rows to be deleted.
Data.txt
state city zone
Alabama Huntsville 4
California SanDiego 3... (3 Replies)
ENVIROMENT
Linux: RHEL 6.4
Log Path: /usr/iplanet/servers/https-company/logs
Log Format: user.log.03-15-2015
I have log4j log rotation enabled rotating files on a daily basis.
The rotated logs are NOT compressed & are taking up too much space.
I need a script that will run daily that... (1 Reply)
Hi All,
Do you have any sample script,
- auto get file from SFTP remote server and delete file in remove server after downloaded.
- only download specify filename
- auto upload file from local to SFTP remote server and delete local folder file after uploaded
- only upload specify filename
... (3 Replies)
Discussion started by: weesiong
3 Replies
LEARN ABOUT DEBIAN
get_robust_list
GET_ROBUST_LIST(2) Linux System Calls GET_ROBUST_LIST(2)NAME
get_robust_list, set_robust_list - get/set list of robust futexes
SYNOPSIS
#include <linux/futex.h>
#include <syscall.h>
long get_robust_list(int pid, struct robust_list_head **head_ptr,
size_t *len_ptr);
long set_robust_list(struct robust_list_head *head, size_t len);
Note: There are no glibc wrappers for these system calls; see NOTES.
DESCRIPTION
The robust futex implementation needs to maintain per-thread lists of robust futexes which are unlocked when the thread exits. These lists
are managed in user space; the kernel is only notified about the location of the head of the list.
The get_robust_list() system call returns the head of the robust futex list of the thread whose thread ID is specified in pid. If pid is
0, the head of the list for the calling thread is returned. The list head is stored in the location pointed to by head_ptr. The size of
the object pointed to by **head_ptr is stored in len_ptr.
The set_robust_list() system call requests the kernel to record the head of the list of robust futexes owned by the calling thread. The
head argument is the list head to record. The len argument should be sizeof(*head).
RETURN VALUE
The set_robust_list() and get_robust_list() system calls return zero when the operation is successful, an error code otherwise.
ERRORS
The set_robust_list() system call can fail with the following error:
EINVAL len does not match the size of structure struct robust_list_head expected by kernel.
The get_robust_list() system call can fail with the following errors:
EPERM The calling process does not have permission to see the robust futex list of the thread with the thread ID pid, and does not have
the CAP_SYS_PTRACE capability.
ESRCH No thread with the thread ID pid could be found.
EFAULT The head of the robust futex list can't be stored at the location head.
VERSIONS
These system calls were added in Linux 2.6.17. No library support is provided; use syscall(2).
NOTES
These system calls are not needed by normal applications. No support for them is provided in glibc. In the unlikely event that you want
to call them directly, use syscall(2).
A thread can have only one robust futex list; therefore applications that wish to use this functionality should use the robust mutexes pro-
vided by glibc.
SEE ALSO futex(2)
Documentation/robust-futexes.txt and Documentation/robust-futex-ABI.txt in the Linux kernel source tree
COLOPHON
This page is part of release 3.44 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
Linux 2012-07-13 GET_ROBUST_LIST(2)