The thing is, I had already tried simple file manipulation like the following:
But this is incredibly slow! If I run this on a 20 MB file I can wait for a few minutes... I just wonder if a more powerful command would do the same job a bit quicker (I mentioned perl but it could be anything).
hi, i have a very long text file. i need to extract with grep command a certain part.
for example text file include 1ooo rows:
1....
2...
3...
.
.
.
1000
i want to view with grep only rows 50-100.
any ideas will be appreciated
thanks... (8 Replies)
In unix how to sort in reverse order based on second field in a text file.
$ cat data1
David:501
Albie:503
Shaun:502
The expected output:
Albie:503
Shaun:502
David:501
Please help :) (4 Replies)
I have a list of Servers in no particular order as follows:
virtualMachines="IIBSBS IIBVICDMS01 IIBVICMA01"And I am generating some output from a pre-existing script that gives me the following (this is a sample output selection).
9/17/2010 8:00:05 PM: Normal backup using VDRBACKUPS... (2 Replies)
I have a tab delimited file with 5 columns
79 A B 20.2340 6.1488 8.5086 1.3838
87 A B 0.1310 0.0382 0.0054 0.1413
88 A B 46.1651 99.0000 21.8107 0.2203
89 A B 0.1400 0.1132 0.0151 0.1334
114 A B 0.1088 0.0522 0.0057 0.1083
115 A B... (2 Replies)
input:
ref001, Europe, Belgium, 1001
ref001, Europe, Spain, 203
ref001, Europe, Germany, 457
ref002, America, Canada, 234
ref002, America, US, 87
ref002, America, Alaska, 652
Without using an END section, I need to write all the info related to the same ref number ($1)and continent ($2) on... (9 Replies)
I have a command which returns the below output. How can I write a script to extract mainhost and secondhost from this output and put it into an array? I may sometimes have more hosts like thirdhost. I am redirecting this output to a variable. So I guess there should be a awk or sed command to... (7 Replies)
Hello
I am looking for a way to look in files and to grep text and see the all section of the text
!
Sharon123
deed
10000
class 360
!
sharon456
2000
deed
!
Sharon789
live
3000
!
To grep "deed "an see the all section (5 Replies)
Hello,
I'm trying to find a solution or a proper tool for the following job: I need to sort a text document with indented sections, so all levels of indentation are sorted independently for each section.
Particularly, I need this for Cisco routers' running config files to compare them with... (2 Replies)
I have a file that should be sorted by a string (shown in red in my example below) in the identifier. The RS is ^@M0, something like this:
@M04961:22:000000000-B5VGJ:1:1101:9280:7106 1:N:0:86
GGCATGAAAACATACAAACCGTCTTTCCAGAAATTGTTCCAAGTATCGGCAACAGCTTTATCAATACCATGAAAAATATCAACCACACCAGAAGCAGCAT... (16 Replies)
Discussion started by: Xterra
16 Replies
LEARN ABOUT POSIX
copymsg
copymsg(9F) Kernel Functions for Drivers copymsg(9F)NAME
copymsg - copy a message
SYNOPSIS
#include <sys/stream.h>
mblk_t *copymsg(mblk_t *mp);
INTERFACE LEVEL
Architecture independent level 1 (DDI/DKI).
PARAMETERS
mp Pointer to the message to be copied.
DESCRIPTION
copymsg() forms a new message by allocating new message blocks, and copying the contents of the message referred to by mp (using the
copyb(9F) function). It returns a pointer to the new message.
RETURN VALUES
If the copy is successful, copymsg() returns a pointer to the new message. Otherwise, it returns a NULL pointer.
CONTEXT
copymsg() can be called from user or interrupt context.
EXAMPLES
Example 1: : Using copymsg
The routine lctouc() converts all the lowercase ASCII characters in the message to uppercase. If the reference count is greater than one
(line 8), then the message is shared, and must be copied before changing the contents of the data buffer. If the call to the copymsg()
function fails (line 9), return NULL (line 10), otherwise, free the original message (line 11). If the reference count was equal to 1, the
message can be modified. For each character (line 16) in each message block (line 15), if it is a lowercase letter, convert it to an upper-
case letter (line 18). A pointer to the converted message is returned (line 21).
1 mblk_t *lctouc(mp)
2 mblk_t *mp;
3 {
4 mblk_t *cmp;
5 mblk_t *tmp;
6 unsigned char *cp;
7
8 if (mp->b_datap->db_ref > 1) {
9 if ((cmp = copymsg(mp)) == NULL)
10 return (NULL);
11 freemsg(mp);
12 } else {
13 cmp = mp;
14 }
15 for (tmp = cmp; tmp; tmp = tmp->b_cont) {
16 for (cp = tmp->b_rptr; cp < tmp->b_wptr; cp++) {
17 if ((*cp <= 'z') && (*cp >= 'a'))
18 *cp -= 0x20;
19 }
20 }
21 return(cmp);
22 }
SEE ALSO allocb(9F), copyb(9F), msgb(9S)
Writing Device Drivers
STREAMS Programming Guide
SunOS 5.10 27 Jun 1995 copymsg(9F)