Thursday, July 28, 2005

If a program requires a superuser privileges to do some job, "It is always best to give up the extra privilege when it is no longer needed, just in case the program has a latent bug that someone could exploit".
Richard Stevenes, Unix N/W Prog. V1
see line 11 page 666:
setuid(getuid()); /* don't need special permissions any more */
// it drops superuser privileges that was previuosly given to a normal user to be able to create a raw socket


السلطات البريطانية لم توجه أي اتهام للنشار
http://www.misralarabia.com/article.asp?article=6359

طب اعتقلوه بناءاً على ايه؟
عشان شوية إشاعات في الجرايد؟
للدرجة دى من الاحتقار وهضم الحقوق تتعامل الدولة مع مواطنيها لإظهار مدى خنوعها للحكومة البريطانية ؟؟!!؟؟

فعلا : فى مصر، المواطن متهم حتى تثبت براءته

Sunday, July 17, 2005

Struct vs. Union

if you defined:
struct s
{
int i;
char c;
}


when you define a variable of type s, a memory of size equals to the size of integer + the size of character will be reserved.

In contrasts, when you define:
union u
{
int i;
char c;
}


A variable of type u, results in the reservation of memory size of the max of integer and character, and this makes you are able to use the type u as either integer OR character.

summary:
struct = AND
unio = OR
Error msg in gcc:
invalid conversion from `void*' to `char*'

This error message appeared to me in a line using malloc()

when, i changed just the file extension form .cpp to .c the error disappeared !