1 #include <stdlib.h>
2 #include <unistd.h>
3 #include <string.h>
4 #include <stdio.h>
5
6
7 #define e(); if(((unsigned int)ptr & 0xff000000)==0xca000000) { setresuid(geteuid(), geteuid(), geteuid()); execlp("/bin/sh", "sh", "-i", NULL); }
8
9 void print(unsigned char *buf, int len)
10 {
11 int i;
12
13 printf("[ ");
14 for(i=0; i < len; i++) printf("%x ", buf[i]);
15 printf(" ]\n");
16 }
17
18 int main()
19 {
20 unsigned char buf[512];
21 unsigned char *ptr = buf + (sizeof(buf)/2);
22 unsigned int x;
23
24 while((x = getchar()) != EOF) {
25 switch(x) {
26 case '\n': print(buf, sizeof(buf)); continue; break;
27 case '\\': ptr--; break;
28 default: e(); if(ptr > buf + sizeof(buf)) continue; ptr++[0] = x; break;
29 }
30 }
31 printf("All done\n");
32 }
