1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
#include <sys/auxv.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
static const char *text = "Change this text and recompile while the process is running";
int
main(int argc, char *argv[])
{
uintptr_t exe_addr = (uintptr_t)getauxval(AT_EXECFN);
const char *exe;
if (!exe_addr) {
fprintf(stderr, "%s\n", "Sorry, AT_EXECFN not found, would have to use /proc/self/exe, which is out of scope");
/* by the way, if you just exec into /proc/self/exe
* you restart the process, to the same version as
* running even if it has been replaced (define
* RESTART to try it out) */
return 1;
}
exe = (void *)exe_addr; /* beware, this might be a relative path */
if (argc != 2 || strcmp(argv[1], text))
printf("%s\n", text);
unlink(exe);
for (;;) {
sleep(1);
#ifdef RESTART
execlp("/proc/self/exe", argv[0], text, NULL);
abort();
#else
execlp(exe, argv[0], text, NULL);
#endif
}
}
|
