Needs GLIBCXX_3.4.9

Dear all, I made a shared library libfoo.so to be linked with some application; but the link does not work and I get the message that libfoo.so uses something in libstdc++.so.6 that needs GLIBCXX_3.4.9 that is missing. Sorry if that sort of questions comes again and again in this forum, I am a newbie on Linux. I am using a Linux RedHat 5 64bit machine. I suspect that there is some issue with some compatibility libraries that is not installed, or maybe this is connected with 64bits/32bits compatibility. I would be very grateful to anyone with a clue. Vincent. PS:

Basic Shell concept

I'm trying to build a very basic shell (like bash but..bad). And I've decided the best way to do this would be to make my programs separately and put them in their own directory, much like /bin. Well how can I set something like this up. I tell my shell 'ls' and it looks in the directory I choose to store the data in, then it runs the program and when its done exits and returns to its own process? I'm teaching myself C so I'm pretty lost on how to do this. Sorry if this is poorly worded

Not able to change baud rate

Hi all, I have a video streaming device running Linux. when i change the baud rate using the 'stty' command,it changes temporarily for few seconds. Then again it changes to 115200 automatically. Please find below the /etc/inittab file & the /etc/init.d/rcS file for reference. inittab: ###### # /etc/inittab: init(8) configuration. # $Id: inittab,v 1.91 2002/01/25 13:35:21 miquels Exp $ # The default runlevel. id:3:initdefault: # Boot-time system configuration/initialization script. # This is run first except when booting in emergency (-b) mode. si::sysinit:/etc/init.d/

cpu time usage of multi threaded process and single threaded process.

these are 2 programs for matrix multiplication. :- 1st one is implemented using multiple threading and 2nd using single threading. Process' Cpu time for both comes out to be same ..... but should be less for multi threaded process. Plzz help why Cpu time is same.... ? program1 using multiple threading :- #include<signal.h> #include<stdio.h> #include<sys/types.h> #include<unistd.h> #include<pthread.h> #include<time.h> // decleared globally so can be used by all threads through resorce shareing and dont get destroyed on exit of threads............ int PMatrix[500][500];

Not printing in thread function

Hi, Following program is to parallelize Matrix Multiplication using Threads. My problem is that , my proogram is not printing anything in function "thread_function". Kindly Help. #include<signal.h> #include<stdio.h> #include<sys/types.h> #include<unistd.h> #include<pthread.h> #include<time.h> // decleared globally so can be used by all threads through resorce shareing and dont get destroyed on exit of threads............ int PMatrix[500] [500]; //final matrix product of other marices int Matrix1[500][500],Matrix2[500][5

Can extra processing threads help in this case?

I have an application that uses enormous amounts of RAM in a very memory bandwidth intensive way. I recently upgraded my hardware to a machine with 600% faster RAM and 32-fold more L3 cache. This L3 cache is also twice as fast as the prior machines cache. When I benchmarked my application across the two machines, I gained an 800% improvement in wall clock time. The new machines CPU is only 11% faster than the prior machine. Both processes were tested on a single CPU. I am thinking that all of the above would tend to show that my process is very memory bandwidth intensive, and thus

gdb question

Hi There, I have a question. I'm running into a segfault but on bt i do not get source code but only useless addresses. I've done the following: - loaded my binary with symbol-file - compiled binary with following flags: -g3 -O0 -g - executed gdb from the source directory - set dir to "./" Why am I still not seeing the source code? :o Thanks for a little help here! -- Ron

implementing a remote shell, redirections

I'm implementing a simple remote shell for educative purposes: client: arsh serveraddr port server: arshd client selects between descriptors STDIN_FILENO and socket server redirects STDIN_FILENO, STDOUT_FILENO, STDERR_FILENO to socket Problem is when server executes a program with STDIN redirection, p.e.: arsh$ cat <input.txt cat reads lines until a ^D, then client shutdowns socket for writing (SHUT_WR) so that cat detects an EOF. Child server process executing cat finishes, but when server tries to read next command line after prompt ($arsh) sees that socket is closed and finis

Your host is new proxy site to open your Facebook,Myspace ,Rapid share pages

Your host is new proxy site to open your Facebook,Myspace ,Rapid share pages http://yourhost.22web.net/pro.html Forex is the largest market in the world learn it for free http://yourforex.66ghz.com/

Where does gdb find source code to display and step through?

I am mystified by something that seems like magic. In the simplest case, I wrote the source code and gdb finds it because it happens to be in the current directory. What about, however, harder cases? What if the *.c file is in some other directory? Is all the source code saved in the *.o (and later in the *.a) files?? I am currently working on a program that uses the LIBTIFF library. I don't believe I have source code for such library, and yet I can single step and see source code in gdb. This is probably documented somewhere, but an expert explanation is most welcome. TIA,

stdin problem.

Hi, My code allows a user to redirect a file to stdin so that some text data can be read, no problem. Later a user confirmation to proceed is requested, using getchar(). This is not working because of what's left in stdin. Initially I was actually stopping reading stdin when some specific data being searched for was located, ignoring what was left in stdin. When I realized what was happening, I made sure I continued reading stdin all the way through. The problem seems to be that my user confirmation call to getchar() receives the following char: '�'. I looked in the ASCII

Pseudo terminals and exclusive access

Hi, When I open a pseudo terminal, enable exclusive access and close the file descriptor again: fd = open (devname, ...); ioctl (fd, TIOCEXCL, NULL); close (fd); And then try to open the same pseudo terminal again, it fails with the error EBUSY. It seems that the exclusive flag persists after closing. Is that the expected behavior? I did assume it would get cleared, because now the terminal becomes locked forever. Is the behavior with real serial ports the same? When I clear the flag before closing, it works fine. Thanks in advance? Jef

timestamp

Hi There, I'm putting a timestamp into a text file to allow an external monitor application to supervise my process (and rerstart it in case...) I havefollowing code: ofstream HBfile ("/tmp/LSHB", ios::trunc); gettimeofday(&HeartBeatTV,NULL); if ((HeartBeatTV.tv_sec%10)==0) { if (HBfile.is_open()) HBfile << HeartBeatTV.tv_sec << endl; } This should update the timestamp in /tmp/LSHB every 10 seconds no excuse (if called in a while(1) kinda fashion), right? For some reason we see the timestamp not updating shortly after 3am (Pacific time) which is weird...

config files

Hey everyone! I wanted to know what kind of config files you like to use when you need them in your software. XML? Unix-Bash-Style? I am currently using XML-Files that can hold a lot of information, however I am not sure if that is ideal or what other concepts are out there (and commonly used!). Since we are past the days where every byte was precious, I tend to use the following approach to config files: - human readable (i.e. text files of some kind) - the easiest, distinct way to describe a configuration option is probably the best - use an existing library to valida

pigz version 2.1.6 released

For any pigz users out there, pigz version 2.1.6 is now available at http://zlib.net/pigz/ . The changes from 2.1.5 are: - Added pigz.spec to distribution for RPM systems [Brown] - Avoid some compiler warnings - Process symbolic links if piping to stdout [Hoffstätte] - Decompress if executable named "gunzip" [Hoffstätte] - Allow ".tgz" suffix [Chernookiy] - Fix adler32 comparison on .zz files pigz is a parallel implementation of gzip that compresses using threads in order to take the most advantage of multiple processors and cores. pigz has all the functionality of gzip (

Code and Creation 69556

This is a free and informational site I created for application development and application development source on the net. Enjoy, and it's free, nothing to register oir sign up for just an informational site. http://codeandcreation.com ItRWJpyTgT)brigRi_mf#upew

reboot

Hi The C program below certainly reboots my Solaris 10 system, but it does not seem to do it cleanly (doesn't send SIGTERM to the running processes). If I run the Solaris reboot command though, that does seem to cleanly reboot. How come? [code] #include <sys/reboot.h> int main(int argc, char* argv[]) { reboot(RB_AUTOBOOT, NULL); return 0; } [/code]

Suggestions needed

Hi all, Small programming assignments whose difficulty levels are gradually increased OR programming assignments that test the knowledge of various aspects of the language are good for students and probably for those who want to learn programming in general BUT there's also another category of people like me who don't really want to learn programming because they've done a lot of it ( i know no one can do 'enough' programming but I am getting at something else here. I dont want to learn programming in general since I do a lot of it in my office and I've done a lot of it in the pas

SIGABRT

Hi There, I got a SIGABRT signal showing up in syslog but gdb doesn't display anything. My app still seems to be running (if I look with ps ax) but it kinda seems as if a certain thread had stopped. How can I tell what's going on? GDB was set to at least display SIGABRT signals but nothing has shown up... :o Signal Stop Print Pass to program Description SIGABRT Yes Yes Yes Aborted Thanks for hints and suggestions! roN

Problem of debugging into glibc functions?

Problem of debugging into glibc functions? Hi all, I want to debug into glibc functions like nftw() in Ubuntu Linux (nftw require a function pointer argument and I want to step into this function). But after installed libc6.dbg and set environment LD_LIBRARY_PATH(I have to set it in gdb by "set env LD_LIBRARY_PATH /usr/lib/debug"), my emacs/gdb still cannot step into the glibc function. Shall I compile the glibc by myself, or shall I set other environment parameters? Thanks! Davy

Create direcotry recursively

Hi ALL How to create directory recursively in UNIX using system call mkdir? surprisingly i dint find any way in api to make it work like "mkdir - p". Pls tell me is there any system call to do this? Is thre any best already existing code to do this? Note: I canot use system cmd.

Why Are Women Turning to Islam

Why Are Women Turning to Islam At a time when Islam is faced with hostile media coverage particularly where the status of women in Islam is concerned, it may be quite surprising to learn that Islam is the fastest growing religion in the world, and even more ironic to discover that the majority of converts to Islam are WOMEN . The status of women in society is neither a new issue, nor is it a fully settled one. And where Islam is mentioned, for many the term 'Muslim Women' prompts images of exhausted mothers chained to the stove, 'victims' suppressed in a life of indoctrination, fr

Increase performance of pseudo terminals?

Hi, I'm using socat and pseudo terminals, to create two virtual serial ports linked with a null modem cable. The purpose of this setup is to allow two applications to communicate with each other, as if they were talking to real serial ports. socat PTY,link=/tmp/ttyS0 PTY,link=/tmp/ttyS1 But I noticed the performance is quite bad. Trying to transmit data takes very long. For instance transmitting 32KB takes a few minutes on my machine (Ubuntu 9.10), while on another user's machine (Mac OS X) it's much faster, in the order of a few seconds. Any idea what is causing this?

connect to hostname and receive ack

Hi There, I have twio problems, I seem to be able to succesfully connect to my server on port 1514 but I don't get any data sent off eventho the # of bytes sent match my strlen...what's going on here. If i establish a telnet connection manually it works just fine. My code to connect to the server is as follows: int connecttoserver(char *hostname,int port) { struct timeval tv; struct sockaddr_in sa_server; char host[255] = {0}; const struct hostent *host_info; struct in_addr *address; if (m_sock >= 0 ) { shutdown(m_sock, SHUT_RDWR);

Karima Slack Razi

Karima Slack Razi I took the Shahadah on September 20, 1991. If you had told me 5 years prior that I would embrace Islam, I never would havebelieved you. In retrospect, Allah's guidance was so subtle yet consistent, thatnow I see my whole life as leading up to that moment. It is difficult toencapsulate the exact factors that brought me to Islam because it was a journey, a process, that lasted three years. Those three years were both exhilarating andexhausting. My perceptions of myself and the world changed dramatically. Somebeliefs were validated; others, shattered. At times I f