04-10-2012
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi All,
How can i use the file for printing in awk
file1
----------
update table crn_ras_disc_dtl a set a.a5=$1,a.a1=$2,a.a2=$3,a.a3=$4,a.a4=$5;
file2
--------
10|KUMAR|23|MALE|US
20|RAJ|24|MALE|AU
Output
---------
update table crn_ras_disc_dtl a set... (12 Replies)
Discussion started by: cskumar
12 Replies
2. Shell Programming and Scripting
line_no=6
echo 'Phone,' `awk 'NR==$line_no{print;exit}' <filename>`
what is the error in this..
it says..
awk: Field $() is not correct.
The input line number is 1. The file is <filename>.
The source line number is 1.
i want to print the data in the $line_no line of a certain... (2 Replies)
Discussion started by: St.Fartatric
2 Replies
3. Shell Programming and Scripting
I'm a bit stuck in getting variable from awk to shell. I tried searching but most of them showing to assign to shell variable via..
VAR=`echo $line | awk -F: '{print $1}'`
which is correct ofcourse
My problem is multiple assignments of variable like this one. The above solution will give... (10 Replies)
Discussion started by: ryandegreat25
10 Replies
4. Shell Programming and Scripting
Dear All,
we have a command output which looks like :
Total 200 queues in 30000 Kbytes
and we're going to get "200" and "30000" for further process. currently, i'm using :
numA=echo $OUTPUT | awk '{print $2}'
numB=echo $OUTPUT | awk '{print $5}'
my question is : can I use just one... (4 Replies)
Discussion started by: tiger2000
4 Replies
5. Shell Programming and Scripting
In awk script,
#!/bin/sh
awk 'BEGIN{i=0;}{i=i+5;}END{print i}' in.txt
vr=0;
vr=$i;
echo "$vr"
How can i assign that value of i in $vr(variable) of shell script? (7 Replies)
Discussion started by: cola
7 Replies
6. Shell Programming and Scripting
I have 3 files and each contain m*n matrix.
m = number of rows (horizontal lines)
n = number of columns (entries in a particular line)
What I wish to find is the sum of the 2nd number in the last row.
Ex
file1.dat
2 5 8 8
4 6 7 8
3 8 3 7
file2.dat
3 4 1 4
8 4 0 3
4 7 3 7
... (3 Replies)
Discussion started by: dynamics
3 Replies
7. Shell Programming and Scripting
Trying to do something like this
ls -lrt | awk '$9=="test5"'
-rw-r--r-- 1 lrmq db2iadm1 381 Sep 20 21:56 test5
But now, I need to give a variable in place of test5. For example let's define x as test5
x=test5
ls -lrt | awk '$9=="$x"'
This doesn't seem to be working. It doesn't take the... (4 Replies)
Discussion started by: blazer789
4 Replies
8. Shell Programming and Scripting
I am reasonably capable with awk and its quirks, but not with shell weirdness. This has to be Bourne Shell for portability reasons. I have an awk program that is working just fine; it handles multiple input streams and produces several reports, based on the request (-v Variables). In addition... (3 Replies)
Discussion started by: DerekAsirvadem
3 Replies
9. Shell Programming and Scripting
I want to split one file input.tab into two separate ones, odd lines to input_reads1.txt, even lines to input_reads2.txt for a serial of files with similar name pattern. Also I want to "match" input/output file names to keep consistency of file name:
CSEL_02.0_input.tab
CSEL_03.4_input.tab... (2 Replies)
Discussion started by: yifangt
2 Replies
10. UNIX for Beginners Questions & Answers
I have the following script, and I want to assign the output ($10 and $5) from awk to N and L:
grdinfo data.grd | awk '{print $10,$5}'| read N L
output from gridinfo data.grd is: data.grd 50 100 41 82 -2796 6944 0.016 0.016 3001 2461. where N and L is suppose to be 3001 and 100. I use... (8 Replies)
Discussion started by: geomarine
8 Replies
LEARN ABOUT CENTOS
libtalloc_stealing
libtalloc_stealing(3) talloc libtalloc_stealing(3)
NAME
libtalloc_stealing - Chapter 2: Stealing a context
Stealing a context
Talloc has the ability to change the parent of a talloc context to another one. This operation is commonly referred to as stealing and it
is one of the most important actions performed with talloc contexts.
Stealing a context is necessary if we want the pointer to outlive the context it is created on. This has many possible use cases, for
instance stealing a result of a database search to an in-memory cache context, changing the parent of a field of a generic structure to a
more specific one or vice-versa. The most common scenario, at least in Samba, is to steal output data from a function-specific context to
the output context given as an argument of that function.
struct foo {
char *a1;
char *a2;
char *a3;
};
struct bar {
char *wurst;
struct foo *foo;
};
struct foo *foo = talloc_zero(ctx, struct foo);
foo->a1 = talloc_strdup(foo, "a1");
foo->a2 = talloc_strdup(foo, "a2");
foo->a3 = talloc_strdup(foo, "a3");
struct bar *bar = talloc_zero(NULL, struct bar);
/* change parent of foo from ctx to bar */
bar->foo = talloc_steal(bar, foo);
/* or do the same but assign foo = NULL */
bar->foo = talloc_move(bar, &foo);
The talloc_move() function is similar to the talloc_steal() function but additionally sets the source pointer to NULL.
In general, the source pointer itself is not changed (it only replaces the parent in the meta data). But the common usage is that the
result is assigned to another variable, thus further accessing the pointer from the original variable should be avoided unless it is
necessary. In this case talloc_move() is the preferred way of stealing a context. Additionally sets the source pointer to NULL,
thus.protects the pointer from being accidentally freed and accessed using the old variable after its parent has been changed.
Version 2.0 Tue Jun 17 2014 libtalloc_stealing(3)