The below program is giving unpredictable and wrong output when I compile with g++ under Ubuntu OS , tried with the complier avilable with Ubuntu 8.04 and Ubuntu 10.04 LTS.
But it works fine when complied and ran Redhat g++ 3.4.6
I am new to perl and am having trouble adding some strings together.
My full code is below:
The problem is $NewCommandB is always split into two lines, where the second line contains the "/atlas2/<blah>/<etc>/..." string. Since I am generating a .sh file to execute a lot of similar commands I need the string to all be on one line. Any idea why I get this behaviour and any suggestion on how to tell perl to make $NewCommandB a one line string?
Btw for completeness finalFileList.txt contains just file names one line after another:
Inside a loop i'm populating a string variable. Because csh doesn't have very good support for arrays I thought of doing this. I want to add a new line character to the end of the concatenation each time the loop iterates. Then at the end print this variable out.
I tried " and some resources said it was just a "". Neither work. What am I doing wrong?
why isnt this working as i am expecting:
Code:
[schneidz@hyper temp]$ cat example.tmp
hello world
[code]....
I have found this from a site [url]
Code:
But it does not work for me, segfault.
M busy upgrading one of my clients old Debain etch boxes to Lenny but i keep on getting this error.
Use of uninitialized value in concatenation (.) or string at /usr/share/perl5/Debconf/Config.pm line 22.
debconf: delaying package configuration, since apt-utils is not installed dpkg: unrecoverable fatal error, aborting: syntax error: unknown user `root' in statoverride file E: Sub-process /usr/bin/dpkg returned an error code (2)
i am wondering why the following simple code causes a segfault on exit,when the std::string destructor is called.
Quote:
#include <iostream>
#include <string>
using namespace std;
[code].....
I guess the memset messes with some internal std::string's data structures/pointers. I personally am anti-memset,and always avoid them.
I am fairly new to linux still and I'm currently trying to write a shell script (which I have never done) that is supposed to run the xrestop(like top) program. What I want to do is execute the program and check the identifier column to see if a certain program is running. If it is running I want to strip the data from that row of the terminal say every 5 seconds or so and put it in a text file. Is this going to be a complicated thing?
Heres a list of the columns when you run xrestop program res-base Wins GCs Fnts Pxms Misc PxmMem Other Total PID Identifier.
copy string a to string b and change string b with toupper() and count the chars
View 3 Replies View RelatedSee the first program below :
Code:
This code when compiled gives the following errors:
1. conflicting types for 'fun' at line no: 9
2. previous declaration of 'fun' was here at line no: 3
Why is this happening?
If i modify the above program as shown in the second program below:
Code:
This code when compiled gives no errors.
Why the difference occurs between the first and second program?
I am creating a 15 integer array which is input from the user and outputted for the.
Ex.
Enter the array values: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Your values are: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Code:
I am learning Linux daemon programming and write a simple daemon program. The issue is no data is written to the log file (/var/tmp/simpledeamon.log) though the file is successfully created (it's file size is zero from ls -l output). Could someone kindly point out the error in my program,The code is based on the Devin Watson's article at Here is the code:
// simplydaemon.cpp
// A simple Linux daemon.
#include <sys/types.h>
[code]...
My script.
This is may script:
Code:
Problem: Output file doest not exclude the values in grep -av
I've been trying to understand pthread in C a little better. So I made a simple program that takes in a string from the command line and creates a thread to print the string. I've looked online and copied the basic concepts but there are something things I'm confused about. The programs works just fine, but I have questions. Here's what I have so far.
[Code]....
One thing I'd like to know is why the 3rd argument in the pthread_create function which is my SendMessage function needs to be typecasted to a void pointer and then send the address of the function. Also as for the 4th argument, I would see typecasting to void pointer in some of the pthread examples I saw online, but in my case I'm passing a char pointer, would this be correct? In which case would I ever want to pass a void pointer?
Do I need a pthread_exit(NULL) in my main and in the SendMessage function? If so, why? I added the sleep() function so that I could let the pthread_exit function in my SendMessage function execute first. I simply saw that the online examples on pthread had pthread_exit() in both locations.
I have a set of lines as ahown below:
Leon went to school
Leon came back from school..
Leon had dinner...
I have to replace the line containing "dinner" by a single string LUNCH...
I need to creates string suffixes out of a Reference string. for eg. suffixes of abcdefg will be
1)bcdefg
2)cdefg
3)defg
and so on...
create an array of pointers to point to the first few characters and then use that pointer to print the rest of the string.But when i print using the pointer i get GARBAGE values! shudn't std::cout<<ptr[w] print the string following the char it is pointing to? why do i get garbage values?
So if I'm given a location of a file like:
How can I just take the type of the file at the end? I know I can use strrchr() for a period to get the pointer to the period just before file type. Is there a build in string function that will just take the rest of the string from a certain point on forward in the string? I know it wouldn't be much work to make it myself, but I figured I would find out if it already existed before doing it.
Code:
The error is:
Code:
What I want to do is take input of ip4 as a string, convert it to an integer to add 1 to it, then reconvert it back to a string. Its not working.
My full code is:
Code:
I've been given a custom-made string class which handles string, wstring and bstr. It has a number of methods and assignment operators to convert to and from different types. The app I work on compiles happily in VS6 and VS2008, but when trying to compile in Redhat (version 4.1.1 in Redhat 5.0)
[code]....
I have the following two type of strings1: A/D2: A/C/DI am trying to write a subroutine to check whether all of the letters in string 1 appears in string 2. If yes, return true. If not, return false. In the above example, all the letters (A and D) in string 1 are also present in string 2, so I return true.
View 4 Replies View RelatedIf I have these lines...
How can I remove the (X) part from the end of all those? For example, when I cat the file which contains those, I just want to see those lines without the (X)...
I'm trying to make a shell script, and for part of it I need to search through a file, find the ip in the file, and save ONLY the ip to another file. ( not the entire line that its on ) I understand grep has wildcards, where I could do something like, "grep (...........) traceroute-output for an ip address.
View 3 Replies View RelatedDo I have the convert the int to a string using stringstream then convert the string to a char? or is there a more direct way?Also is there a way to tell the length of a int?
View 5 Replies View RelatedI have one xml string as follows.
I have to parse it and have to get the elements On AC, NO system battery, NA, NA and hav to staore in a buffer. I want a c program to do this. can i use DOM or COM in unix
Actually there are three c programs double,half and square which respectively double halfs and square an integer , i have place .out file in sbin folder ,now they are processes now i have to concatenate these three processes like double half it return 8 how i will write the codes for it.
View 1 Replies View RelatedI have a serial port program which is reading a string .if(read(readfd,sResult,1)>0)where sResult is unsigned char sResult[10];if sResult is array of 10 then iam getting string perfectly but if iam making sResult only as unsigned char I am getting NULL value CODE BELOW
Code:
unsigned char sResult;
main()
{
readfd = open("/dev/ttyUSB0", O_RDONLY);
if (readfd == -1)
{
perror("READ: open_port: Unable to open /dev/ttyUSB0-
[Code]...
After running the following command, I get:
[root@yukiko /]# find / -iname .bashrc
/home/clamav/.bashrc
/home/vpopmail/.bashrc
/etc/skel/.bashrc
/root/.bashrc
But I would like to have a command that prints a specific line by supplying the command with the line number, for example:
[root@yukiko /]# find / -iname .bashrc | getline(2)
/home/vpopmail/.bashrc
Is there such a command on CentOS?
I will have to code this. However I am lacking of time since I have too much to do. make a short code bash/dash to prompt the country with Zenity, then, get the PLS or m3u url and prompt with another zenity which radio to play. http://www.listenlive.eu/index.html
My code to get url's radio country.htm is:
Code:
while doing socket/network programming, i am getting SSH-2.0-openssh4.7 error, instead of showing day time of server.general description i have Linux Box, with the help of putty i am connecting from windows system to Linux box,no problem in loging,after typing program, i am running the program with gcc. when typing ./a.out, it is showing SSH-2.0-openssh4.7, actually it should display daytime from linux box in both tcp and udp.
View 1 Replies View Relatedi use touch screen monitor .when some one touch on screen i want to wake up in my c program and i use this touch usb output for my prograam
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