I'm reading Hacking: The Art of Exploitation (2nd Edition), and I'm currently on the section about buffer overflows. In the first example, the variables are declared/initialized in this order: int auth_flag = 0; char password_buffer[16]; The example goes on to explain that you can use gdb to examine auth_flag and password_buffer's ad...
For example, suppose I have a buffer called char journal_name[25] which I use to store the journal name. Now suppose a few lines later in the code I want to store someone's name into a buffer. Should I go char person_name[25] or just reuse the journal_name[25]? The trouble is that everyone who reads the code (and me too after a few week...
I have this union: typedef union Message { message_base base; message_with_parameters parameters; reply_message reply; buffer_t *buffer; // can't figure out what to put here } message; message_with_parameters has a message_base as the first field and reply_message has a message_wit...
I have a C# server that accepts multiple clients, and multiple messages from each client. 1- In order to start reading from each client i need to pass a buffer (bytes), but the problem is I don't know how much data is the client is going to send. So is there a way to know how much data a client is going to send so that i can start readi...
Hello, From the middle of a script I've been able to isolate a (very sudden) issue with querying some data from MySQL using PHP. Using the same connection within the same API in the past, I have been able to do numerous (millions of) individual INSERT queries in the past. Also, I've been able to return and manipulate large SELECT resu...
Hello! I usually type M-x "buffer-menu", to change buffer. How can I do this with a shorter command? Its quite a long string to type. thanx! ...
I split windows to view two different parts of the selected buffer simultaneously. If I switch to another buffer in one of the windows and then switch back to the original buffer, I'll lose the previous window position---I'll see the same parts of the selected buffer in both windows. How can I restore window positions amongst buffer swit...
I'm using popen to read output from shell commands. I will use fgets to read line by line. My question is how to choose the best buffer size for my char* buffer? I remember from a professor telling us to include <limits.h> and use LINE_MAX for such things. It works fine on my Mac, but there's no LINE_MAX on Linux. This mailing list arch...
Hi, I've a fread line in my code that reads the contents of the file like this fread(buffer,sizeof(char),1024,file1); I kow that I can free the buffer using free(buffer); but my questions is, is there a way to delete the elements in the buffer one by one?. Say, I used the first element and I no longer need it so I want to delete it...
Hi. I am trying to make a simple HTTP server that would be able to parse client requests and send responses back. Now I have a problem. I have to read and handle one line at a time in the request, and I don't know if I should: read one byte at a time, or read chunks of N bytes at a time, put them in a buffer, and then handle the byte...
Hi, I'm downloading 6kB of data from a test instrument connected via TCP socket. I'm using SOCK_STREAM: if((MySocket=socket(PF_INET,SOCK_STREAM,0))==-1) exit(1); I haven't set the any buffer sizes, so I assume I'm using whatever the default is. I'm having a problem with receiving data. Here's the statement: if((recv(MySocket, &YRa...
Hi. I need to make an applet using JMF that will capture video from the webcam, show it to the user while it's recording and have a pause option to pause ( not stop ) the video capture. I already know how to capture the video and audio and save it to a local file, but, as I said, I need to give the user the option to pause this captur...
In the following code,what is the meaning of buf = malloc(n * sizeof(char)); is n*sizeof(char) necessary,if yes.. please elaborate. int n; char* buf; fstat(fd, &fs); n = fs.st_size; buf = malloc(n * sizeof(char)); EDIT1 And What if I write (n*sizeof(double)) ...
Having a few problems with output buffering. Mainly, I'm trying to run output buffering with the ob_gzhandler callback, but it keeps telling me its using an unsupported compression type. Everything is enabled, and I believe the problem is that running ob_get_level() at the start of my script produces a level of 1. php.ini has my output_b...
Hi, Can anyone give me a simple example of how to use SafebUffer. i.e how do I create and initialise one - MSDN docs don't appear to show this. ...
Im trying to do a screen-flashing application that flashes the screen depending on the audio(like an audio visualizer, but instead of a visualization like bars or something like that, just flash the screen). I already made the music player and know how to make the widget get full screen and change color(which will flash), but I dont kno...
Hi I have question regarding cin and buffer. I want to make a simple io program which takes integers. Anyway I stumbled to a problem with buffer. Using MinGW in windows7 the following code will print out all four integers that I input. But when I switch to SunOS and compile it with G++ it will only print out the first integer. Is this a...
I'm implementing an audio track class and I'm in need of a good circular buffer implementation. I'm using shorts for my audio samples, so I would prefer to use a ShortBuffer class for the actual buffer. This track will need to be thread-safe but I can guarantee that only one thread will read and another will write on the track. My curren...
I learned that copy something to kill buffer, I can use the kill-new buffer (kill-new (file-truename buffer-file-name)) How about copying the content to clipboard? Does emacs/elisp provide the function? ADDED I got 2 answers, but the answer seems to apply X windows system. As I use Aquamacs, it may not be a universal solution that c...
I've got a fairly complex classic asp page that for some users doesn't render completely at some times. I wonder if the response.buffer property might have something to do with that. Would setting it to false make it more likely to render completely? I suspect it's crapping out at some point but can't reproduce it on my end. ...