Programming :: Read The Contents Of A File?
Jan 11, 2010
I am trying to read the contents of a file into something else. I have a file.txt that I am working with, I want to read the file and take the data and run some commands with the data that it read. So if it read www.yahoo.com I want to be able to nslookup. Does that make sense? I have been trying to use the read command but that does not seem to work. I even was trying to read filename | > filename to see if I could even read any of the data at all. Nothing is working.
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Jan 22, 2011
How can read the file /var/etc/allInOne.cfg and distribute its contents on multiple cfg files using C language. /var/etc/allInOne.cfg contain the data and the path of each text file.
The source file "/var/etc/allInOne.cfg "look like this:
line1
line2
...
line10
filePath:/var/etc/file1.cfg
line12
line13
...
line14
filePath:/var/etc/file2.cfg
linen
..
filePath:/var/etc/filen.cfg
the result will be :
The expected result is:
/var/etc/file1.cfg will contain line1 to line10
/var/etc/file2.cfg will contain line 12 to line13
/var/etc/filen.cfg will contain linen to linen-1
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Nov 17, 2008
I have two files list1.cfg and list2.cfg both files contains differentrecords details like
List1.cfg
NAME1:25:C:NAME LINE1:
NAME2:25:C:NAME LINE2:
CITY:25:C:City:
[code]....
Now I want to append contents list2.cfg to list1.cfg(It ispposible using cat list2.cfg >>list1.cfg) but I want to check if content of (record) in list2.cfg is present in list1.cfg then dont append it otherwise append it.
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Jul 16, 2011
A long time ago I wrote a short essay about the 'federal' 'reserve' board. I don't remember it's name or format. I think it's somewhere on my rather large hard discs (to of them divided into various partitions).I'm trying to write a command line that will find it based on a quote that is in it: "our fathers brought forth"I have tried various configurations of grep, and or combining grep with find, but I'm getting nowhere. I really don't understand the syntax of either command, or how they work together, and the examples that I can find are really no help at all.
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Nov 4, 2009
i am trying to write a bash script. i have a text file called comp2.tmp which has a list of items in it
example comp2.tmp
Code:
filename.pdf
filename2.zip
filename3.ttf
and so on
I have another text file called comp1.tmp which should have the same list of files in it, but does not look as pretty
example comp1.tmp
Code:
someothertext here ...... 10/30/2009 ...... filename.pdf
=========================------------------==============
othertextagain .......... 09/28/2008 ...... filename2.zip
========================------------------===============
bunchmoretext ........... 04/12/2005 ....... filename3.ttf
and so on
i would like to check if the filenames listed in comp2.tmp exists in comp1.tmp
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May 27, 2010
want to watch the file continoulsy for any newly written data to file.Presently i am periodically opening the file and checking for the newly updated contents.Is there something like refresing the file descriptor, since open is a system call, calling it many times may affect performance. Does the tail program opens file multiple times to check for the updated contents when used with -f option.Can some one explain or give some links on how the filedescriptors remembers its end contents while some other programs keeps updating the file.
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May 18, 2010
I want to list the contents of a zip file amd put each entry into an array. I've been doing
[code]....
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Jun 10, 2010
I have multiple HTML files in a folder. there is a <h2> tag like this:
Code:
<h2>some text</h2>
in each file. I want to write a shell script/batch file to add this tag in <head> section of each file:
Code:
<!-- TITLE= "same text from h2 tag" -->
Note that <h2>some text</h2> in some files has 1 or more linebreaks and so I couldn't capture tag content using a simple grep or...
for example:
<h2>first part of text
second line of text</h2>
The line break shouldn't be shown in <!-- TITLE= "same text from h2 tag" -->. The script has to capture tag content & skip line breaks.
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Jul 27, 2010
I am splitting a file based on the values read from an input file. The below one is the script.
1)How do I add the header which is present in the original file to the new split files created?(For eg. pharmacyf conatins header as table column names. The new files created (ODS.POS.$pharmacyid.$tablename.$CURRENT_DATE.dat) are without the header).
2) Also the script is creating 0 byte files for the pharmacyids which are not available in the intial file? Can this be avoided?
for pharmacyf in *
do
tablename=`echo $pharmacyf |cut -f4 -d'.' `
while read pharmacyid
do
grep -w $pharmacyid $pharmacyf >> $OUT/ODS.POS.$pharmacyid.$tablename.$CURRENT_DATE.dat
done< inputfile
done
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Jul 2, 2009
Alright, so I have been trying to resolve this issue for awhile, but now feel like help is very necessary.I have a 128(by)128(by)128 array in a MAT file, and am using the following MATLAB script to convert it to a DAT file:
load C_42.mat
fid=fopen('C_42.dat','wt')
fwrite(fid,Nu)
[code]...
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Jan 30, 2010
I am trying to use "hexdump" on the files in the /dev/ directory. This is ubuntu 9.10.There is some more in this forum: [URL]Hexdump returned small blocks of bytes or couldn't see the files even as root. I expected to see the actual data streams from the various devices. How come this doesn't work?
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Jan 8, 2011
I'm trying to read contents of a floppy disk, can't even find the disk, much less contents.
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Apr 13, 2011
I want to read content of a file inside a gawk script.I know that by using "gawk -f filename" I can read a file, but I want to do that inside the script.
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Apr 25, 2010
ITT and am just lurning about scripting and need to read a file and output the file to the screen. We need to do this with a while loop.
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Jan 12, 2011
I have installed, LTO-5 in rhel 5.
now i have taken a backup using command.
dump 0uf /dev/nst0 /dir
now i want to see contents of tape.
the command tar tvf /dev/nst0 is showing error
is there any other command to see dump backup contents
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Dec 9, 2010
have been playing around with a script for a few hours and now I need to be able to output the lines in a text file one by one to be used later in the script.What it gonna do is to read a log file and grep the usernames, then write them to a file, and then run one script for each user, to search for more information about them in the log.But I don't know how to output a single line from a file, and google does not return any solution.
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Mar 10, 2011
I am trying to read from a file named matrixA.dat that contains a matrix formatted like this:
2 x 3
1 0 2 -1 3 1
I am reading the lines in, and this is the source that I have so far: Code: #include <stdio.h>
#include <string.h>
#define DATALIMIT 17
#define DIMLIMIT 5
#define NAMELIMIT 40
[Code]...
was stored in dataA, so when I print it all I get is a newline. Why didn't it grab the 1 0 2 -1 3 1 line?
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Aug 8, 2010
I have a script that reads part of a line, delimited between the first and second intended part by a colon. Then it "chops" the part after the colon, which are words offset by commas (counting them beforehand so as to catch every word in the string's second part), like this:
Code:
"COLORS.JPG:red,orange,yellow,green,"
(Returning)
red
[code]....
single script that parses/breaks both parts of a line like this "COLORS.JPG:red,orange,yellow,green;blue,indigo,violet," so that the two parts, separated into single words (or two and three words, sometimes with spaces) can be used as single-line annotations and written to JPEG files using Exiv2. So far, I haven't been able to come up with a script that does this without one part of the total string(usually that part after the colon) becoming the first word in the second array. In other words, I look for this:
KEYWORDS:
[ ]red
[ ]orange
[ ]yellow
[code]....
Or vice-versa (ie, the second array winds up as a single-line "member" of the first). I think it's because I'm using a single while read loop to read the text file in which the filenames and substrings happen to be. If there's some way of reading a file once and going back to the beginning to read it again in another while loop, I haven't found it.
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Mar 14, 2011
I am struggling with Bash scripting at the moment (I can't seem how anyone can write scripts with this language!!!) I have a need at home to have a cron job execute daily to lookup my downloads.txt file, read each url (per line) and download content from that url. Then that entry needs to be removed (well I keep all urls in memory and clear the file afterwards). If an error occurred during the download process, then the url is written to a downloads.err file. I got all the above working except for properly reading the url from the text file without including newline characters. I am using the following to read:
while read url; do
--Do whatever here--
done < downloads.txt
How can I get it not to let the url variable have newline characters?
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Oct 22, 2010
i am trying to read in a file 1 line at a time and for some reason it stops printing out at about line 62,000.
i am doing this:
Code:
while(fgets(c0, 1085, fstream0) != NULL)
but after about 62,0000 lines it stops printing. no seg-fault, no core dump. it just stops printing to the terminal then returns me to the command line after a couple of minutes. as a hack i am doing split -l 50000 on the input and calling my program 5 times.is there some limitation on fgets that i am not understanding ?
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Oct 19, 2010
a project using bluetooth to send data byte by byte to external devices buti'm not familiar using arrays to read file from another location before sending the data.If you could,do correct my codes.Here's my code,
void loop(){
char Msg[]={"Hello"};
char *start;
[code]...
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Mar 15, 2010
i have wrote a long piece of code above with the "main" which is calling openFile( &fout, filename )filename contains the txt name in a form of "data.txt"i wanna read the data from the file and output it into fout for later use.the data in that file is a vector looking interger group.i have the following code:
int openFile( ofstream * fout, const char * filename)
{
ifstream iFile(filename);
[code]...
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Mar 12, 2010
So my firefox's profile.ini file looks like this:less .mozilla/firefox/profiles.ini
Code:
[General]
StartWithLastProfile=1
[code]...
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Jun 21, 2011
I'm writing a program which now accepts user input:
Code:
echo "Enter a date in the format YYYY MM DD hh mm ss."
read gregyr gregmo gregdy greghr gregmn gregsc This lets the user input a date and time, such as 2011 06 21 15 12 45, and have each number assigned to their corresponding variable. Later in the program, these variables are put into an equation, and then the terminal spits out the answer. Now I have to have the program read all of the lines from a text file, which is in this format, assign the variables.
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Apr 22, 2010
I am writing a script that involves reading the content of a file present in a directory and/or its sub directory. I know readdir returns all the files & DIR names in a directory but how to check weather readdir is returning a file or a directory
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Apr 29, 2010
I have a file which has several entries with
# comment 1
1245
# comment 2
5667
# comment 3
456456
how can I read the file, sum the numbers ( "avoid" the #lines) and then get the average of the numbers?
I do awk '{s+=$0} END {print s}' /tmp/file.txt. and this give me the sum correctly, but how can I get also the average ?
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Jul 26, 2010
I need to read a file and parse a string. I know in Perl there is the split command. Is there something similar to that in C++?
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Feb 4, 2010
What are the possible problem when Windows access the file from Ubuntu got Read Only even though have a full permission to read, write and execute the file? Ubuntu to Ubuntu accessing the file there is no problem only Windows got a problem.
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Apr 8, 2011
So I finally managed to get my Samba file server working () but now I have a question. On the server I have 4 folders, each being used for a certain topic. How would I set the folders as read only but not the contents, so that way remote users can read/write to the folder but can't delete or rename the folder itself? Also, if I restart the Linux box it will cease to show on the Windows Network unless I delete the Samba share and remake.
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Jul 2, 2010
i have a script to read a file and get each column with varibles.actually my file: hplog1 sample 3 lines consists of
client1_day- 2010
jan
client2 2009
[code]....
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