Programming :: How To Read A String And Add It At The End In Unix

Jun 9, 2010

I want to read the line in the text file and get the string in the file and paste it in the directory column

for example i have a line like /ftp/prod/SWC1407.DOC

from this 1407 should be parsed and appended at the end of the move command

mv /ftp/prod/SWC1407.DOC /nfp/1407

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Programming :: C - Read A String Into Shmget And Shmat?

Mar 8, 2010

I want to read a string into shared memory using shmget and shmat. I'm using something like:

char *bookmark_strings, *s;
Book_Key = ftok(SHM_LOC,SHM_KEY);
shared_bookmarks = shmget(Book_Key, MAX_BOOKMARKS * sizeof(bookmarks), (0644 | IPC_CREAT));
bookmark_strings = shmat(shared_bookmarks, NULL, 0);
s = bookmark_strings;
*s = "hello";

I know that since it's a string I should be using something other then just char, but with something different shmat fails to be assigned.

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Programming :: Read A File And Parse A String In C++

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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Programming :: Read A Blank Line Ie A String Of Length 0?

Apr 19, 2010

in gcc how to read a blank line ie a string of length code:



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Programming :: Copy String A To String B And Change String B With Toupper() And Count The Chars?

Oct 22, 2010

copy string a to string b and change string b with toupper() and count the chars

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Programming :: Pthread - Take String From The Command Line And Creates A Thread To Print The String

May 3, 2011

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.


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.

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Programming :: Using Sed Replace Line Containing Particular String By A Single String?

Oct 16, 2010

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...

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Programming :: Creates String Suffixes Out Of A Reference String?

Feb 25, 2011

I need to creates string suffixes out of a Reference string. for eg. suffixes of abcdefg will be

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?

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Programming :: C - Put A Specific Arbitrary Part Of A String Into It's Own String?

Apr 18, 2010

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.

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Programming :: Convert String To Integer Back To String C++ ?

Mar 13, 2010


The error is:


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:


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General :: The READ System Call In UNIX?

Oct 29, 2010

mplement the read system call in unix...i want the code for read system call...

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Programming :: Assigning Custom String To Std::string In C++?

Oct 12, 2009

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)


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Programming :: How To Check If All Letters Of One String Are In Another String?

Nov 11, 2010

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.

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Programming :: Unix Programming - Single Thread Server Can Support Exactly 2 Clients At Once

Sep 28, 2010

A simple TCP based chat server could allow users to use any TCP client (telnet, for example) to communicate with each other. For this question you should consider a single process, single thread server that can support exactly 2 clients at once, the server simply forwards whatever is sent from one client to the other (in both directions). Your server must not insist on any specific ordering of messages as soon as something is sent from one client it is immediately forwarded to the other client. As soon as either client terminates the connection the server can exit

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Programming :: Unix Programming - Single Process That Does Not Start Up Any Other Threads

Sep 28, 2010

i want a process that can operate as both a TCP echo server and a UDP echo server. The process can provide service to many clients at the same time, but involves a single process that does not start up any other threads.

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Programming :: Convert The Int To A String Using Stringstream Then Convert The String To A Char?

Mar 26, 2011

Do 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?

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Programming :: C Program In Unix Environment?

Jan 12, 2011

my instructor gave me a project in c programming language, the probelem i don't have a c program combiler and i don't have a unix os on my computer, and my knowledge in c program is soo weak i took it years ago, i have this code but it does't compile on Dev-C++ on Windows OS, so if you just help me out with this program:

#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>


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Programming :: How To Write Own Shell In Unix

Sep 16, 2010

I wish to create my own shell for my operating systems project in college...

My professor has asked me to make sure that my shell can execute at least 30 or 40 commands... I have around a month's time

I have seen endless source codes in the net, I'm not able to understand any of it

How do i get about doing it?

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Programming :: Simulate Unix Kernel In C++ ?

Jun 2, 2010

How simulate unix kernel in c++..or give me a link....

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Programming :: Unix Process Id In Jdk1.4.2?

Mar 2, 2009

what is the best/accurate way to get the process id in java code in order to write to the log file. To be specific: I am using avalon logkit for logging. I really cannot find a way to write the process id to each line in the log.

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General :: Unix Platforms And Programming Paradigms?

Oct 31, 2010

There are C, C++, Java, Perl, Python, PHP, and some other programming orand scripting languages for a Unix / Linux Distro. On a scale of 1 - 10, I rate myself on:

5 for C / C++
5 for Java
7 for PHP
2 for Perl

When I look for a Unix job I am often asked if I know C / C++, Perl or Java. Well, they mostly look for C / C++ + Unix or Perl / Python + Unix or Java + Unix combinations. That is the trend here in India. When they advertise for C / C++ + Unix they also mean Real Time System, Kernel (Modules), and Device Drivers Development. I don't know how to do those things in C / C++. But I must say that I love C / C++ and anything else no matter how attractive or easy it could be doesn't look that much challenging to me. So, which should I take now to add to my skills set and be more productive in terms of System Administration and Application Development and Support?

In C/C++ and Java, though I know them, I don't get to work in my current job. However, I often use Shell Script (Bash) and PHP and so I am finding Perl easy because the basics of Computer Programming that I learnt by learning C and C++ and Java have made it easy for me to understand any programming language.

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Programming :: Replace A Certain Range Of Characters In Unix?

Mar 8, 2010

I have a hard time figuring this out. I need to replace the date formats of arrival date(column 31-40) and departure date(column 42-51) and I need 2 outputs. I cannot even figure out how to start.code...

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Programming :: Transfer C Codes From UNIX To System?

Jun 16, 2010

I got some problems and need your help.

In school, my codes are writeen under UNIX system (Solaris10/SUN), now I need to transfer those codes to Linux (Redhat5). But after I directly copy to Linux, it shows many errors and warnings.

Does anyone know which codes I need to modify to specifily suit for UNIX? I am not familiar with those systems and hope to get your kind help.

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Programming :: Unix Script For Oracle Database?

Apr 7, 2011

creating the below unix script to run in oracle database .I need a script which should do the following things.

1. The script should insert row count of a table from one database(A) into table (AB) in another database(B).

2. The script should update tow count of the similar table and tablespace from database (B) in to a table AB.

3. The script should update the status column of the table AB as: 'Y' if the rowcount of the table@A and rowcount of the table@B matching. or else it should update 'N'

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Programming :: Serial Port Programming String?

Nov 24, 2010

I 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

unsigned char sResult;
readfd = open("/dev/ttyUSB0", O_RDONLY);
if (readfd == -1)
perror("READ: open_port: Unable to open /dev/ttyUSB0-


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Programming :: Connect To Remote Unix Server Using Script?

Aug 4, 2010

1)We need to do a clean up a folder in a remote unix server . What is the best option to connect to remote server? how do we use ssh ? Is there any prerequisite to use ssh?

2) We have to SCP few files to another folder in a remote unix server . I formed the below command to use in script. Is it of correct usage? scp -r $POS_HOME/posctl [login nameip address:/home/username/directory]

I have seen public key/private key generation part for SCP. How do we handle this? Does this need to be done as unix admin?

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Programming :: Batch File To Run Unix Commands From Windows?

Nov 22, 2010

I need to write a windows batch file to run unix commands by logging onto a telnet unix server. For example , I might want the batch file to log onto the unix sever, run the ls command, collect the output in a file and ftp it back to my windows desktop

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Programming :: Getting Error In Ftp From Windows To Unix Box - Permission Denied

Mar 18, 2009

I have a written a java code to ftp a file from the windows box to unix box. It keeps giving me the following error : " PORT 204,63,56,5,16,78: 550 Permission denied." I am able to ftp manually from windows to unix.

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Programming :: Designing A Signal Handler With Sigwait In UNIX?

Jan 20, 2010

I'm new to Unix and every signal handler algorithm I've seen is more or less a copy of what I'm trying to do.[URL] designing a signal handler with sigwait in UNIX?

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Programming :: Unix Command To Remove White Spaces?

Sep 18, 2010

Im using this unix command(in a php file) to remove a certain string and then remove the whitespace left by that string. Unofrtunately in many cases, the files get completely erased. Is there a workaround?


$dir = "./";
$rmcode = `find $dir -name "*.php"


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