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1 | // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- |
2 | // vim: ts=8 sw=2 smarttab | |
3 | /* | |
4 | * Ceph - scalable distributed file system | |
5 | * | |
6 | * Copyright (C) 2011 New Dream Network | |
7 | * | |
8 | * This is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License version 2.1, as published by the Free Software | |
11 | * Foundation. See file COPYING. | |
12 | * | |
13 | */ | |
14 | ||
15 | #include "common/BackTrace.h" | |
16 | #include "common/perf_counters.h" | |
17 | #include "global/pidfile.h" | |
18 | #include "common/debug.h" | |
19 | #include "common/signal.h" | |
20 | #include "common/config.h" | |
21 | ||
22 | #include <signal.h> | |
23 | #include <sstream> | |
24 | #include <stdlib.h> | |
25 | #include <sys/stat.h> | |
26 | #include <sys/types.h> | |
27 | ||
28 | std::string signal_mask_to_str() | |
29 | { | |
30 | sigset_t old_sigset; | |
31 | if (pthread_sigmask(SIG_SETMASK, NULL, &old_sigset)) { | |
32 | return "(pthread_signmask failed)"; | |
33 | } | |
34 | ||
35 | ostringstream oss; | |
36 | oss << "show_signal_mask: { "; | |
37 | string sep(""); | |
38 | for (int signum = 0; signum < NSIG; ++signum) { | |
39 | if (sigismember(&old_sigset, signum) == 1) { | |
40 | oss << sep << signum; | |
41 | sep = ", "; | |
42 | } | |
43 | } | |
44 | oss << " }"; | |
45 | return oss.str(); | |
46 | } | |
47 | ||
48 | /* Block the signals in 'siglist'. If siglist == NULL, block all signals. */ | |
49 | void block_signals(const int *siglist, sigset_t *old_sigset) | |
50 | { | |
51 | sigset_t sigset; | |
52 | if (!siglist) { | |
53 | sigfillset(&sigset); | |
54 | } | |
55 | else { | |
56 | int i = 0; | |
57 | sigemptyset(&sigset); | |
58 | while (siglist[i]) { | |
59 | sigaddset(&sigset, siglist[i]); | |
60 | ++i; | |
61 | } | |
62 | } | |
63 | int ret = pthread_sigmask(SIG_BLOCK, &sigset, old_sigset); | |
11fdf7f2 | 64 | ceph_assert(ret == 0); |
7c673cae FG |
65 | } |
66 | ||
67 | void restore_sigset(const sigset_t *old_sigset) | |
68 | { | |
69 | int ret = pthread_sigmask(SIG_SETMASK, old_sigset, NULL); | |
11fdf7f2 | 70 | ceph_assert(ret == 0); |
7c673cae FG |
71 | } |
72 | ||
73 | void unblock_all_signals(sigset_t *old_sigset) | |
74 | { | |
75 | sigset_t sigset; | |
76 | sigfillset(&sigset); | |
77 | sigdelset(&sigset, SIGKILL); | |
78 | int ret = pthread_sigmask(SIG_UNBLOCK, &sigset, old_sigset); | |
11fdf7f2 | 79 | ceph_assert(ret == 0); |
7c673cae | 80 | } |