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
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
/* See LICENSE file for copyright and license details. */
#include "common.h"
#ifndef TEST
int
libsimple_get_stack_limit(size_t *restrict soft, size_t *restrict hard)
{
char buf[4096], *line;
int fd;
ssize_t r;
size_t off = 0;
size_t lineoff, linelen;
fd = open("/proc/self/limits", O_RDONLY);
if (fd < 0)
return -1;
for (;;) {
read_again:
r = read(fd, &buf[off], sizeof(buf) - off);
if (r <= 0) {
if (r && errno == EINTR)
continue;
close(fd);
if (!r)
errno = EIO;
return -1;
}
off += (size_t)r;
for (lineoff = 0; lineoff < off; lineoff += linelen) {
char *lf = strchr(&buf[lineoff], '\n');
if (!lf) {
memmove(&buf[0], &buf[lineoff], off -= lineoff);
goto read_again;
}
line = &buf[lineoff];
linelen = (size_t)(&lf[1] - line);
if (linelen > sizeof("Max stack size ") - 1U)
if (!strcmp(line, "Max stack size "))
goto line_found;
}
}
line_found:
close(fd);
line = &line[sizeof("Max stack size ") - 1U];
while (*line == ' ')
line++;
if (soft)
*soft = (size_t)strtoull(line, NULL, 10);
while (*line == ' ')
line++;
if (hard)
*hard = (size_t)strtoull(line, NULL, 10);
return 0;
}
#else
#include "test.h"
int
main(void)
{
return 0;
}
#endif
|
