I am making an FTP in C for learning purposes. I know how to connect to a computer and read/write a file, but I'm having problems with running programs. My idea is to connect to the computer, cd into a directory called Available and run ls -l or dir depending on what type of operating system the computer the client has connected to has. After I run one of the commands I want to be able to list the results on the client's computer. My question is, is this possible and if so what would I do? Thank you for reading.
Don't run console commands like that. Use the operating system's API / system calls to enumerate files in the current directory.
Windows: FindFirst/FindNextFile APIs
Linux: http://www.cs.cf.ac.uk/Dave/C/node20.html#SECTION002000000000000000000 <-- this should help for linux
Related
I'd like to use terminal for all of my normal git and compiling and running processes (my school has a server that is linked to my repo on bitbucket), but I really don't like terminal-based text editing software such as Emacs and Vim. Is it possible to open and edit files from the terminal using a GUI based text editor? The reason I'm asking is because the terminal is the only way I can access the server files. Thanks in advance!
Aw, but vim is the best! :) Well, you can use nano, which is friendlier. Or, if you insist: if you are using SSH to connect to the server (and the server has an X server running !) then you can look into the ssh -X option to view X windows on your remote machine.
Oh and you could look into scp command as well (behaves almost just like regular cp, but the destination is on another host). That way you could edit on your machine, then copy it via SSH (although you'd want to be careful when copying files directly to the server filesystem)
Edit: Also, if you really don't like using the terminal (why though? (-: ), some file managers allow you to get the same functionality of the previous commands purely via GUI (for example).
You've left out some important information that someone would need to know to answer your questions. The other posters have made some assumptions.
You've mentioned this "terminal", but it's not clear exactly what that is, or how you're getting to it. What kind of computer do you have in front of you? What shell is running in that terminal? Is the shell running on your local computer, or have you remotely connected to a server and running that shell on the remote computer?
Based on what you said, I have a feeling you're making a remote connection to a server, perhaps using ssh. You likely have either a Windows or Mac PC in front of you. In those circumstances, running a GUI editor like Eclipse is possible, but likely not practical. You would have to have Eclipse installed on that remote computer, and you would be displaying the Eclipse window on your local computer using the X11 protocol. That takes a lot of bandwidth.
If my assumptions are correct, my recommendations depend on how long you expect you're going to want to stay familiar with this environment. If you intend to do this sort of work forever, then you should learn vi and Emacs to the best of your ability. As someone who's been using Emacs likely longer than you've been alive, I'd recommend you learn it, but vi is also a critical skill.
UNIXY systems provide open or gopen, depending on your OS, that should get the job done. From the man page:
By default, gopen will open filename with the application currently assigned to the file's extension. But by specifing the -a flag on the command line you can tell gopen to open the file with another application.
This means that you can use it to open files in your preferred editor
with a line like
gopen -a Eclipse file
I have c program where i have to save a file in ubuntu. The program runs fine on my local pc but i want to use a single exe for other pcs whether they run linux or windows. So, how should i give path to store file that it works everywhere?
Sorry, but you can't do what you want.
When an Operating System runs a program, it looks in the file to find things that it needs to know. Windows and Linux store this information in incompatible ways, so you won't be able to create a file that will run under both Windows and Linux.
I have an exam on tomorrow on TCP/IP programming. Following is one of the previous question on this paper.
Write and run a client and a server program. Using C language in UNIX, with the
following specifications :
• A TCP client program will send a range of number (e.g. 1 to 10) to the server.
• TCP server accept the number range from client and send back the sum of the
number range. Client will print the result.
I dont know how to setup the compiler and other settings to run this tcp ip programs. When I search online, I got two different programs, one for Client and another For server. Some please tell me how can i run these programs to get desired output. What kind of compiler should I install on my system.( I am using windows 7) ??
Since the assignment requires your code to work on a Unix system, you first need to install one. Follow these simple steps to install a virtual Unix environment on top of your existing Windows installation.
Download and install VirtualBox for Windows.
Download & unpack this Ubuntu 12.10 disc image (NOTE: Requires 7-Zip).
Launch VirtualBox and create a new Virtual Machine (name it Ubuntu).
In the "Virtual Hard Disk" settings, select "Use existing hard disk" and select the image file you just downloaded (NOTE: It's filename should end in ".vdi").
Run your new Virtual Machine. You should see the Ubuntu splash screen.
Login with username ubuntu and password reverse (NOTE: Case Sensitive!).
Open up Terminal and type sudo apt-get install build-essential (NOTE: when Terminal prompts you for a password, use reverse).
You should (with hope) have everything you need for your assignment. For more information on network programming, consult Beej's Guide to Network Programming -- Using Internet Sockets.
You need to open two different terminals on your system.
In the first terminal compile and run the server.c program.(make sure either you listen to all ips or your host ip(atleast).
while this is running.(it will wait for a request from your client program)
Run the client program in the other terminal.
Hope this solves the problem!
For details on how to create and run a file in unix refer http://www.wikihow.com/Compile-a-C-Program-Using-the-GNU-Compiler-%28GCC%29
P.S: you can do the same in win7 if iam not wrong only that terminal here in called command prompt!
Post the results if possible!
Download a thing called VMWare player. And look for a Ubuntu image that you can load with the VMWare player. That way, you will have a little Linux virtual machine that you can run inside or along with Windows 7. You can use the compiler GCC in your Ubuntu or whatever other Linux virtual machine. And get lots of coffee. Blargle is correct, but I think my suggestion is a little better, because you end up having a fairly complete Unix type environment to develop in. Blargle's way put Unix tools on top of Windows, which I find to be kind of clunky.
I learnt socket programming from this site. He has given everything in detail . Download an Vmware workstation and load up ubuntu . Understand the programs they are pretty much straight forward .
Maybe you can try to look at Network Socket on the web. You can easily find a lot of good tutorial that can answer your question.
You can use the compiler you want on your system, depending on what are you using now.
I have my local computer and I also have a remote computer. I want to make a C program that moves a file or folder to that remote computer. How can I do this in C? Or is this only possible though Terminal commands?
Depending on how complex your requirements are, you could use libssh (LGPL, used in various ssh clients), investigate modifying dropbear (MIT), or quick 'n dirty:
system("scp myfile host:/some/path/to/file");
I would like to know if I can use g++ to compile C++ source files stored on an FTP server? Can this be done?
Note: The FTP server is within the local network
You can't execute commands over FTP, nor can you operate directly on files stored on an FTP server unless you have mapped the FTP server to a filesystem. How to do the latter depends on your operating system.
Since you said g++, I assume Linux, so look into FTPFS.
No, this is not possible. Ftp doesn't allow you to execute programs on the server, it is just used to transfer files. To execute programs (like the compiler) you need some different kind of access to the server, like for example with Ssh.
If you are using a Linux system (and probably any *nix or BSD flavout as well) then yes it is possible if the ftp-server is mounted as a filesystem on your machine, like Tyler McHenry wrote.
It is however not neccessary to "look into FTPFS" if you are using any recent Gnome-based distro. In Ubuntu (9.04) I can do "Places"->"Connect to server" and choose FTP. Then, when the folder is opened in Nautilus you can find the mounted directory in ~/.gvfs/ and then you should be able to compile it without any trouble at all.
I would be very surprised if KDE did not have the same feature, but the directory will be mounted somewhere else.
Does the FTP server have a public website that works with scripting languages, such as PHP? If so, you could upload your source code, edit a PHP file that calls system and compile your code.
In general this probably isn't a good idea: It's a slow, manual process & could be subject to security problems if the PHP script lets you edit the compilation command.