I am trying to free memory allocation after EOF from keyboard is detected (ctrl+D) in a C program. I've written a small program to replicate my problem:
When I run this under valgrind with --leak-check=full --show-reachable=yes it is saying the line is not freed when I terminate with ctrl+D. What am I doing wrong here?
I wrote a ksh script for Helpdesk. I need to know how to disable ctrl-c,ctrl-z,ctrl-d..... so that helpdesk would not be able to get to system prompt :confused: (6 Replies)
I was wondering what is the function in C to free a resource(usually a variable)
I know in C# there a Garbage collector, but in c and C++ there are none.
I believe in c++ the function is free(); (8 Replies)
Hi All,
I just installed 8GB of Memory in a P550 and when the system booted, it's only showing 4GB (3808MB). How can I get the system to see the other 4? (12 Replies)
Hello,
I am trying to free memory allocation after EOF from keyboard is detected (ctrl+D) in a C program. I've written a small program to replicate my problem:
int main(int argc, char *argv) {
char *line;
line = (char*)malloc(sizeof(char)*(512));
line = fgets(line, 512,... (10 Replies)
H! I have written script where it need to invoke the perl script in background, then write the pid in temp file then bring back the job to foreground. whenever the Ctrl-C or Ctrl-Z is pressed in the script has to exit and prompt should be dispalyed. but this script causing exit from shell session... (2 Replies)
Hi,
while executing shell script, in the middle of the process, if we kill the shell script( ctrl+z or ctrl+c), script will be killed and the files which using for the script will be in the folder.
How to handle those scenarios. Is there any possibilities, if user breaks the script, I need to... (3 Replies)
Hi friends,
I am trying to add a newline char ('\n') between the query and the commit statement in the following shell script.
#! /bin/sh
echo "select * from tab; commit;" > data.sql
I have tried typing in "Ctrl-V + Ctrl-J" combination which has inserted ^@ (NUL) character but the commit... (1 Reply)
Hi..!
I'm stuck with my automation of starting a process and keeping it running even after the current ssh session has exited..
So i'm trying to use command 'screen'. which is doing exactly what i wanted, But the problem is automation of the same.
i will have to press Ctrl+a and Ctrl+d for... (2 Replies)
Discussion started by: chandana hs
2 Replies
LEARN ABOUT DEBIAN
readkey
readkey(3alleg4) Allegro manual readkey(3alleg4)NAME
readkey - Returns the next character from the keyboard buffer. Allegro game programming library.
SYNOPSIS
#include <allegro.h>
int readkey();
DESCRIPTION
Returns the next character from the keyboard buffer, in ASCII format. If the buffer is empty, it waits until a key is pressed. You can see
if there are queued keypresses with keypressed().
The low byte of the return value contains the ASCII code of the key, and the high byte the scancode. The scancode remains the same whatever
the state of the shift, ctrl and alt keys, while the ASCII code is affected by shift and ctrl in the normal way (shift changes case,
ctrl+letter gives the position of that letter in the alphabet, eg. ctrl+A = 1, ctrl+B = 2, etc). Pressing alt+key returns only the scan-
code, with a zero ASCII code in the low byte. For example:
int val;
...
val = readkey();
if ((val & 0xff) == 'd') /* by ASCII code */
allegro_message("You pressed 'd'
");
if ((val >> 8) == KEY_SPACE) /* by scancode */
allegro_message("You pressed Space
");
if ((val & 0xff) == 3) /* ctrl+letter */
allegro_message("You pressed Control+C
");
if (val == (KEY_X << 8)) /* alt+letter */
allegro_message("You pressed Alt+X
");
This function cannot return character values greater than 255. If you need to read Unicode input, use ureadkey() instead.
SEE ALSO install_keyboard(3alleg4), ureadkey(3alleg4), keypressed(3alleg4), clear_keybuf(3alleg4), simulate_keypress(3alleg4)Allegro version 4.4.2 readkey(3alleg4)