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
75
76
77
78
79
80
81
82
83
|
/* ISC license. */
#include <skalibs/sysdeps.h>
#ifdef SKALIBS_HASANCILAUTOCLOSE
#include <unistd.h>
#endif
#include <errno.h>
#include <skalibs/bitarray.h>
#include <skalibs/bytestr.h>
#include <skalibs/diuint.h>
#include <skalibs/stralloc.h>
#include <skalibs/genalloc.h>
#include <skalibs/siovec.h>
#include <skalibs/unixmessage.h>
static inline int copyfds (char *s, int const *fds, unsigned int n, unsigned char const *bits)
{
register unsigned int i = 0 ;
for (; i < n ; i++)
{
int fd = fds[i] ;
if (fd < 0) return (errno = EINVAL, -1) ;
if (bitarray_peek(bits, i)) fd = - fd - 1 ;
#ifdef SKALIBS_HASANCILAUTOCLOSE
else
{
fd = dup(fd) ;
if (fd < 0)
{
int e = errno ;
while (i--)
{
s -= sizeof(int) ;
byte_copy((char *)fd, sizeof(int), s) ;
if (fd >= 0) fd_close(fd) ;
}
errno = e ;
return 0 ;
}
}
#else
#endif
byte_copy(s, sizeof(int), (char const *)&fd) ;
s += sizeof(int) ;
}
return 1 ;
}
static int reserve_and_copy (unixmessage_sender_t *b, unsigned int len, int const *fds, unsigned int nfds, unsigned char const *bits)
{
diuint cur = { .left = b->data.len, .right = b->fds.len } ;
if (!genalloc_readyplus(diuint, &b->offsets, 1)
|| !genalloc_readyplus(int, &b->fds, nfds)
|| !stralloc_readyplus(&b->data, len))
return 0 ;
if (!copyfds(b->fds.s + b->fds.len, fds, nfds, bits)) return 0 ;
b->fds.len += nfds * sizeof(int) ;
byte_copy(b->offsets.s + b->offsets.len, sizeof(diuint), (char const *)&cur) ;
b->offsets.len += sizeof(diuint) ;
return 1 ;
}
int unixmessage_put_and_close (unixmessage_sender_t *b, unixmessage_t const *m, unsigned char const *bits)
{
if (!reserve_and_copy(b, m->len, m->fds, m->nfds, bits)) return 0 ;
byte_copy(b->data.s + b->data.len, m->len, m->s) ;
b->data.len += m->len ;
return 1 ;
}
int unixmessage_putv_and_close (unixmessage_sender_t *b, unixmessage_v_t const *m, unsigned char const *bits)
{
unsigned int len = 0 ;
register unsigned int i = 0 ;
for (; i < m->vlen ; i++) len += m->v[i].len ;
if (!reserve_and_copy(b, len, m->fds, m->nfds, bits)) return 0 ;
for (i = 0 ; i < m->vlen ; i++)
{
byte_copy(b->data.s + b->data.len, m->v[i].len, m->v[i].s) ;
b->data.len += m->v[i].len ;
}
return 1 ;
}
|
