The input to for is a list of tokens separated by the characters defined in the internal field seperator (IFS) variable; usually space, tab and newline. For example:
Will set the variable x to each of the three tokens on the line and then echo those tokens out, one per line:
In your example, you use cat to supply the tokens which are space separated words. The shell then runs one iteration of the loop for each of the tokens and as you discovered you end up with one word printed per line.
As you said, there are better ways to do this. For the sake of anybody who comes across this thread unsure of how:
Hi.
I have the script shown below. If I execute it form the command line it seems to work properly, but when I fun it using the unix "at" command
"at -m now < ./kill-at-job.sh"
It appears to hang. Below is the script, the input file, and the execution as reported in the e-mail from the "at"... (3 Replies)
Hi ,
I am currently using the while loop in bash shell, as follows.
while read line
do
echo $line
done < file.txt
However, i want to use the while loop on file.txt, which will read the file with 4 lines of gap.
Ex- if file.txt is a file of 100 lines, then i want to use the loop such... (3 Replies)
Hi guys i need help with comparing lines in 2 separate files. Both files contain the same amount of lines and i need to output the difference into the 2nd file.
The 1st file is always correct.
1st file (Expected.e):
Tuesday, 11 August 2009
Wednesday, 12 August 2009
Thursday, 13 August 2009... (2 Replies)
I am attempting to insert multiple lines of text into a specific place in a text file based on the lines above or below it.
For example, Here is a portion of a zone file.
IN NS ns1.domain.tld.
IN NS ns2.domain.tld.
IN ... (2 Replies)
I’m writing a bash shell script and I want to join lines together where two variables on each line are the same ie.
12345variablestuff43212morevariablestuff
12345variablestuff43212morevariablestuff
34657variablestuff78945morevariablestuff
34657variablestuff78945morevariablestuff... (12 Replies)
hello all
in my bash script I have a file and I only want to keep the lines that appear twice in the file.Is there a way to do this?
thanks in advance! (4 Replies)
I have a file that looks like this:
cat includes
CORP-CRASHTEST-BU
e:\crashplan\
CORP-TEST
/usr/openv/java
/usr/openv/logs
/usr/openv/man
CORP-LABS_TEST
/usr/openv/java
/usr/openv/logs
/usr/openv/man
What I want to do is make three new files with just those selections. So the three... (4 Replies)
I'm working on a new exercise that calls for a script that will take in two arguments on the command line (representing the range of line numbers) and will subsequently print those lines from a a specified file. Command line would look like this: ./lines_script.bash 5 15 <file.txt. The script would... (8 Replies)
BASH Gurus: Anyone know how to append continuous output command appending to a file, but limit that file to no more than 20 lines? The program I have running is simply monitoring my UDP port 53 for incoming packets endlessly. I just need to keep this file from going over 20 lines. Once the file... (3 Replies)
Morning ..
I have a file with approximately 1000 lines. I want to check that the file contains, for example, 100 lines.
Something like whats given below is ugly. And even if I create a function I have to call it 100 times.
I may need to look through multiple files at times.
Is there a... (4 Replies)
Discussion started by: sumguy
4 Replies
LEARN ABOUT OPENSOLARIS
wscrl
scrl(3XCURSES) X/Open Curses Library Functions scrl(3XCURSES)NAME
scrl, scroll, wscrl - scroll a window
SYNOPSIS
cc [ flag... ] file... -I /usr/xpg4/include -L /usr/xpg4/lib
-R /usr/xpg4/lib -lcurses [ library... ]
c89 [ flag... ] file... -lcurses [ library... ]
#include <curses.h>
int scrl(int n);
int scroll(WINDOW *win);
int wscrl(WINDOW *win, int n);
PARAMETERS
n number and direction of lines to scroll
win pointer to the window in which to scroll
DESCRIPTION
The scroll() function scrolls the window win up one line. The current cursor position is not changed.
The scrl() and wscrl() functions scroll the window stdscr or win up or down n lines, where n is a positive (scroll up) or negative (scroll
down) integer.
The scrollok(3XCURSES) function must be enabled for these functions to work.
RETURN VALUES
On success, these functions return OK. Otherwise, they return ERR.
ERRORS
None.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |Unsafe |
+-----------------------------+-----------------------------+
SEE ALSO clearok(3XCURSES), libcurses(3XCURSES), attributes(5), standards(5)SunOS 5.11 5 Jun 2002 scrl(3XCURSES)