04-15-2009
whats that somecommand?? and is that file available on the dir where you are running that script??
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1. Shell Programming and Scripting
Hi,
does anybody knows about wc -l, how to transform it inot a just number?
this script ALWAYS executes the command3!!, However, the value of BMU_RUNNING is 1
case $BMU_RUNNING in
*0) command1
;;
*1) command 2;;
*)command 3;;
esac
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2. UNIX for Dummies Questions & Answers
Hi,
I have a .txt file
Sample:
=====================
NEXT HOST
=====================
AEADBAS001
ip access-list extended BLA_Incoming_Filter
ip access-list extended BLA_Outgoing_Filter
access-list 1 permit xxxxxxxxxxxxxx
access-list 2 permit xxxxxxxxxxxxxx
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I have a question to do and it's somewhat confusing. It says, and I quote
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4. Shell Programming and Scripting
cat myname.txt
John Doe I
John Doe II
John Doe III
-----------------------------------------------------------------------
for i in `cat myname.txt`
do
echo This is my name: $i >> thi.is.my.name.txt
done
-----------------------------------------------------------------------
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5. Shell Programming and Scripting
Hi there,
my ksh script collects a procstack trace for a particular pid and then greps it by a transaction id to find out the pthread ID:
---------- tid# 1876087 (pthread ID: 4466) ----------
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6. Shell Programming and Scripting
MyFile contains:
ALTER TABLE $DBN.$TBN
ADD $COL $TYP COMPRESS ($VAL);
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Hi all,
One of my txt file has common format like . And I need to manually assign variable to "/a/b/c/file1/txt" , which has common text before "Calculated summary file:".
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Hi,
I am not being able to open txt files with 'cat'. One thing to mention is, the filenames start with #. I guess one can have a unix filename that starts with a special/wildcard character. I have filenames starting with @ and they are opening perfectly with cat. (5 Replies)
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Thank you in advance for looking at this, I've scoured the internet and can't find the answer I'm looking for!! - I am new at bash script so please bare with me!!
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LEARN ABOUT LINUX
set_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 <sys/types.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 notified about only 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.
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
Linux 2015-01-22 GET_ROBUST_LIST(2)