Programming :: Run C Program From Anywhere Within The System (Ubuntu 10.10)?
Apr 30, 2011
I want to add my C program's path to the environment variable PATH. My C program called "md5". So that I can execute it from anywhere (i.e any directory). My md5 program is located at "/home/ahuq/MappingServer/md5_program". So what I did was to put: "export PATH=$PATH:/home/ahuq/MappingServer/md5_program" in the running SHELL. This only makes temporary changes and lets me run the "md5" program from anywhere temporarily.
root@ahuq-kitchen:/home/ahuq# md5 -sanis MD5 ("anis") = 38a1ffb5ccad9612d3d28d99488ca94b But I want to make this change permanent. I tried to put the line "PATH=$PATH:/home/ahuq/MappingServer/md5_program" at the end of "/home/ahuq/.bashrc" and "/home/ahuq/.profile" files. I logged out of the SHELL and
went in again. But it didn't work:
root@ahuq-kitchen:/home/ahuq# md5 -sanis
No command 'md5' found, did you mean:
Command 'cd5' from package 'cd5' (universe)
Command 'mdu' from package 'mtools' (main)
Command 'mdb' from package 'mono-debugger' (universe)
md5: command not found
Maybe I am putting the PATH statement in the wrong place of the above mentioned files. There are a lot if-else-fi structures inside those two files. Do I need to put the PATH statement inside any of those structures? Do I just logout or do I have to restart the system to make the changes active?
Actually I suppose to use this "htop" command to get the system utilities like current processor speed ,running programs ,memory usage(ram and swap) to my program. I planned to get it using popen(). I was success popen("top | grep Mem", "r") with top command. But are there a way to take such information using "htop". Or are there any idea of taking current CPU,MEM,Swp usage as well as Tasks and running tasks using htop or other way to C program...
Okay, just wanted to be perfectly clear on this point... /static/ software builds don't link to /any/ shared libs, right? I.e., can a static-built C program run on a system without a libc installed?
I need to monitor the amount of free physical memory on Linux from within a large C program. The sampling will occur very frequently, so the measurement cannot be performance intensive. The fact that Linux uses much of the theoretically free memory for cache and buffers means that just measuring the free pages is not sufficient. Using free + cache + buffers gives an overestimate as not all cache/buffers can be freed, but I could get a rough idea of how much generally can't and subtract that from the answer.
Possible options that I've come across so far are: Parsing /proc/meminfo - but that involves reading from file which is slow. Extracting the free, cache and buffers values from the output of the Free command - but is there a quick way to do this? Parsing the /proc/freemem file produced by the API here - but this is again reading from file. Is there a way to get that output directly? Speed is an extremely high priority, and the answer it must accurately represent the amount of memory that my program could expand into (to within a few Mb).
I'm trying to write a bash script program in the Linux command terminal that will write to a fellow user and then continue reading down the program. this is what i have (kind of explains the idea too):
#!/bin/sh
clear echo "this is before the write command" write jcummins this message should go to jerry echo "the message didn't send and this string will not appear" echo "it appears it has stopped at the write command"
I have C++ source code(*.cpp) files that expects it's header files in System's include folder which is/usr/include.The cpp files has include lines like this:
when i call the "system()" function from my C program everything works well, but when i try to call it from a cgi C program it doesn't work. the server log tells me this is a permission error.i have chmod'ed 755 the cgi program but it still does not work.
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
im trying to build a simple program for my C programming class, this is the source code
#include <stdio.h> int main() { int length, width, length, height, area, perimeter; perimeter = width + length + height; area = width * length + heigth;
[Code]...
i dont see any error (you might)but every time i run it it runs but after it asks me to input for the width i do it but it doesn't take me to the length, it just stays blank until i input another value in the same place for the width, it asks me for 4 inputs in total i don;t know why, and after i run it different times it gives me different values for the perimeter and are. how can I fix this?
Torrents client kills my Internet connectivity so bad I can't even use a web-browser whilst it's on -- pages take like five minutes to load -- I often forget to turn on my torrent client. Which led me to wonder if there's a way I can launch a script on system idle?
A 32-bit program (Cisco AnyConnect VPN Client) appears to be trying to load a library from /usr/lib even though the 32-bit library is installed in /usr/lib32:
I wondering does the evolution-alarm-notify and evolution-data-server-1.4 would remove from the system monitor or just leave them alone. I didn't want to touch them that would cause system diseaster, can you please confirm for both if say yes to remove that will be good safe.. I am running older version of Ubuntu 5.10 on my lappy.
My firefox browser takes too much memory that runs very slowest and I need to cut down the both program list above or what I need to remove some other program in the system monitor.
How can I do some socket programming using which I can send some data from a linux system to a windows system and vice versa. Can we do that using the IO:Socket:INET perl module??
I found some interesting behavior when discussing the pow function from Math.h with someone. I am well aware of the need to compile with the -lm flag, but to my surprise this actually isn't necessary if the arguments to the pow function are literals. For example, this program compiles in gcc without using -lm:
Code:
#include <stdio.h> #include <math.h> int main()
[code]....
If I try to change the call to any of these:
Code:
double bCubed = pow(2.0, e);
Code:
double bCubed = pow(b, 3.0);
Code:
double bCubed = pow(b, e);
Then the -lm option is required or else it can't compile. So does anyone know why it's necessary to use -lm when the argument(s) is/are variable(s) but it works fine if both arguments are literal values? As a side note, any of the above compile with g++ however. Also, if it helps, this is the version of gcc I'm using:
gcc (GCC) 4.1.2 20080704 (Red Hat 4.1.2-44)
This doesn't happen on my Mac however that is running: i686-apple-darwin9-gcc-4.0.1 (GCC) 4.0.1 (Apple Inc. build 5484)
I used to have a program that displayed system information (cpu/ram usage, stuff like that) but the name escapes me at the moment. The key feature of this program is that it was intergrated into the desktop.
Is there a program like peer block for ubuntu? It is an ip filter program. Here is the website to help answer questions on what type of program it is. http://www.peerblock.com/
Have Ubuntu & it was working well, but has become slow, 'greys out' on me regularly - eg. pic loses colour & nothing will respond for a few or more seconds. Also 'Ubuntu Software Centre' & "Synaptic' thingy come up with errors, saying can't install or uninstall progs. Although it seems they may do it OK despite saying they can't. Have Computer Janitor installed, but this is no longer working at all. So... is there a program or such that I can use to test/clean out the system?? For that matter, is there a program for testing hardware, as I'm not sure if it's an indication of unhealthy hard drive or such?
I have downloaded DavMail and its currently living and running from my /home/user/Downloads/DavMail
in this folder is
davmail.jar davmail.log davmail.sh Lib/
[Code]....
I need to put davmail in a better location than downloads but am unsure where to put it, Im guessing if I seperate some of the files/folders such as lib ill have to modify the davmail.sh file.
wheres the best location to keep this or should it remain in my home folder, I was going to put this in
/usr/local/bin /usr/local/lib
But the jar count as a binary? the .sh certainly wouldnt.
With what functions i can write my program in /etc/init.d with c++ to start every time the computer starts ? (like in windows with RegOpenKey,RegSetValueEx..............) ?
language:cOs: ubuntuI have googled for a c program to get cpu utilization factor from 2 days.We can get it through "top", "who" commands..But I hav not found any API or a program.
Am new to this community and this is my first post. am doing a project where i have to develop a wireless ad hoc routing protocol. I have just begun working on the project. I did not know where to start, so started off with a simple chat program using TCP and thought of making the modifications to it later on. But I do have a prob even i running that!
Am not getting the messages in a synchronized manner. The prog is running fine, but the messages that i type from the server are not reaching the client at all, and at times some garbage values are getting printed(When the strcmp()fn returns 1, "connection terminated" gets printed timely in both the sides. this is the oly situation where i do not get garbage values.) am using VC++ 6.0 here.I have been breaking my head for the past 3-4 days for this simple issue. any response to this would be of great help.
