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
|
/* ISC license. */
/* MT-unsafe */
#include <errno.h>
#include <signal.h>
#include <skalibs/sysdeps.h>
#include "selfpipe-internal.h"
#include <skalibs/selfpipe.h>
#ifdef SKALIBS_HASSIGNALFD
#include <sys/signalfd.h>
int selfpipe_untrap (int sig)
{
sigset_t ss = selfpipe_caught ;
sigset_t blah ;
int r = sigismember(&selfpipe_caught, sig) ;
if (selfpipe_fd < 0) return (errno = EBADF, -1) ;
if (r < 0) return -1 ;
if (!r) return (errno = EINVAL, -1) ;
if ((sigdelset(&ss, sig) < 0)
|| (signalfd(selfpipe_fd, &ss, SFD_NONBLOCK | SFD_CLOEXEC) < 0))
return -1 ;
sigemptyset(&blah) ;
sigaddset(&blah, sig) ;
if (sigprocmask(SIG_UNBLOCK, &blah, 0) < 0)
{
int e = errno ;
signalfd(selfpipe_fd, &selfpipe_caught, SFD_NONBLOCK | SFD_CLOEXEC) ;
errno = e ;
return -1 ;
}
selfpipe_caught = ss ;
return 0 ;
}
#else
#include <skalibs/sig.h>
int selfpipe_untrap (int sig)
{
int r = sigismember(&selfpipe_caught, sig) ;
if (selfpipe_fd < 0) return (errno = EBADF, -1) ;
if (r < 0) return -1 ;
if (!r) return (errno = EINVAL, -1) ;
if (sig_restore(sig) < 0) return -1 ;
sigdelset(&selfpipe_caught, sig) ;
return 0 ;
}
#endif
|
