| 21 Oct 2020 |
 caionov | * EpicFailGuy hello world:
:::c
#include <stdio.h>
int main(void)
{
char *hello = "Hello, world!";
fwrite(hello, sizeof(char), 420, stdout);
hello[0] = 's';
return 0;
}
| 14:04:44 |
| caionov | * EpicFailGuy hello world:
:::c#include <stdio.h>
int main(void)
{
char *hello = "Hello, world!";
fwrite(hello, sizeof(char), 420, stdout);
hello[0] = 's';
return 0;
}
| 14:04:50 |
| caionov | * EpicFailGuy hello world:
#include <stdio.h>
int main(void)
{
char *hello = "Hello, world!";
fwrite(hello, sizeof(char), 420, stdout);
hello[0] = 's';
return 0;
}
| 14:04:56 |
| caionov | fixed:
#include <stdio.h>
#include <string.h>
int main(void)
{
char *hello = "Hello, world!";
char buf[1337];
strcpy(buf, hello);
fwrite(buf, sizeof(char), sizeof(buf), stdout);
hello[0] = 'c';
return 0;
}
| 14:16:20 |
| caionov | * fixed:
#include <stdio.h>
#include <string.h>
int main(void)
{
char *hello = "Hello, world!";
char buf[1337];
strcpy(buf, hello);
fwrite(buf, sizeof(char), sizeof(buf), stdout);
hello[0] = 'c';
return 0;
}
| 14:18:57 |
 Solar | strcpy is insecure caionov, use strncpy instead | 15:07:41 |
 kosshi | whats the point of that actually, why fwrite? it doesnt terminate on a null so you get garbage | 15:20:07 |
| kosshi | * whats the point of that actually, why fwrite? it doesnt terminate on a null so you get garbage | 15:21:37 |
| caionov | exactly | 15:21:58 |
| kosshi | ah, a joke hello world? | 15:23:13 |
| caionov | yes, this may be the worst way possible to print a string | 15:25:25 |
| caionov | ~~I actually got this idea from a pro-Rust meme~~ | 15:27:37 |
| caionov | * ~~I actually got this idea from a pro-Rust meme~~ | 15:27:43 |
| kosshi | #include <stdio.h>
int main(void)
{
printf( "%li\n", (long int)(int[1]){} );
return 0;
}
| 15:29:16 |
| kosshi | * #include <stdio.h>
int main(void)
{
printf( "%li\n", (long int)(int[1]){} );
return 0;
}```
here's the worlds worst random number generator
| 15:29:19 |
| kosshi | * #include <stdio.h>
int main(void)
{
printf( "%li\n", (long int)(int[1]){} );
return 0;
}```
| 15:29:23 |
| kosshi | worlds worst random number generator | 15:29:38 |
| kosshi | * #include <stdio.h>
int main(void)
{
printf( "%li\n", (long int)(int[1]){} );
return 0;
}
| 15:29:43 |
| caionov | short version:
fwrite("Hello, world!", sizeof(char), 4 * 1024, stdout);
*(int *)0 = 0;
(write hello world + garbage and dereference a null pointer)
| 16:23:54 |
| caionov | * short version:
fwrite("Hello, world!", sizeof(char), 4 * 1024, stdout);
*(int *)0 = 0;
(write hello world + garbage and dereference a null pointer)
| 16:24:07 |
| caionov | For some reason nothing is written to the screen if size is too low... | 16:25:23 |
| kosshi | youre lacking a \n i guess | 16:28:26 |
| kosshi | at least my terminal likes to forget outputting anything unless \n is sent | 16:29:06 |
 Neui | caionov: It is most likely because of buffering from the c library; You want to use fflush(stdout); to make sure it writes it. | 17:43:42 |
| Neui | kosshi: There is the posix function setvbuf where you can set different types of buffering, one of them is line-buffered, which is likely the default when it is connected to a terminal | 17:44:49 |
| 22 Oct 2020 |
| caionov | Thanks for the tip. | 02:17:08 |
| caionov | I've been literally dreaming in C recently... Am I ascending? | 02:17:47 |
 grill12513 | >Serial Experiments Lain ( 1998) | 02:18:35 |
| caionov | I've finally implemented wc... gotta git gud. | 04:16:03 |
| 23 Oct 2020 |
| grill12513 changed their profile picture. | 07:02:34 |
