diff options
Diffstat (limited to 'toolbox/upstream-netbsd/lib/libutil/raise_default_signal.c')
-rw-r--r-- | toolbox/upstream-netbsd/lib/libutil/raise_default_signal.c | 117 |
1 files changed, 0 insertions, 117 deletions
diff --git a/toolbox/upstream-netbsd/lib/libutil/raise_default_signal.c b/toolbox/upstream-netbsd/lib/libutil/raise_default_signal.c deleted file mode 100644 index 50cffd440..000000000 --- a/toolbox/upstream-netbsd/lib/libutil/raise_default_signal.c +++ /dev/null | |||
@@ -1,117 +0,0 @@ | |||
1 | /* $NetBSD: raise_default_signal.c,v 1.3 2008/04/28 20:23:03 martin Exp $ */ | ||
2 | |||
3 | /*- | ||
4 | * Copyright (c) 2007 The NetBSD Foundation, Inc. | ||
5 | * All rights reserved. | ||
6 | * | ||
7 | * This code is derived from software contributed to The NetBSD Foundation | ||
8 | * by Luke Mewburn. | ||
9 | * | ||
10 | * Redistribution and use in source and binary forms, with or without | ||
11 | * modification, are permitted provided that the following conditions | ||
12 | * are met: | ||
13 | * 1. Redistributions of source code must retain the above copyright | ||
14 | * notice, this list of conditions and the following disclaimer. | ||
15 | * 2. Redistributions in binary form must reproduce the above copyright | ||
16 | * notice, this list of conditions and the following disclaimer in the | ||
17 | * documentation and/or other materials provided with the distribution. | ||
18 | * | ||
19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS | ||
20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED | ||
21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | ||
22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS | ||
23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | ||
24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | ||
25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | ||
26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | ||
27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | ||
28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | ||
29 | * POSSIBILITY OF SUCH DAMAGE. | ||
30 | */ | ||
31 | |||
32 | #if HAVE_NBTOOL_CONFIG_H | ||
33 | #include "nbtool_config.h" | ||
34 | #endif | ||
35 | |||
36 | #include <sys/cdefs.h> | ||
37 | #if defined(LIBC_SCCS) && !defined(lint) | ||
38 | __RCSID("$NetBSD: raise_default_signal.c,v 1.3 2008/04/28 20:23:03 martin Exp $"); | ||
39 | #endif | ||
40 | |||
41 | #include <errno.h> | ||
42 | #include <signal.h> | ||
43 | #include <stdio.h> | ||
44 | #include <string.h> | ||
45 | #include <util.h> | ||
46 | |||
47 | #if ! HAVE_RAISE_DEFAULT_SIGNAL | ||
48 | /* | ||
49 | * raise_default_signal sig | ||
50 | * Raise the default signal handler for sig, by | ||
51 | * - block all signals | ||
52 | * - set the signal handler to SIG_DFL | ||
53 | * - raise the signal | ||
54 | * - unblock the signal to deliver it | ||
55 | * | ||
56 | * The original signal mask and signal handler is restored on exit | ||
57 | * (whether successful or not). | ||
58 | * | ||
59 | * Returns 0 on success, or -1 on failure with errno set to | ||
60 | * on of the values for sigemptyset(), sigaddset(), sigprocmask(), | ||
61 | * sigaction(), or raise(). | ||
62 | */ | ||
63 | int | ||
64 | raise_default_signal(int sig) | ||
65 | { | ||
66 | struct sigaction origact, act; | ||
67 | sigset_t origmask, fullmask, mask; | ||
68 | int retval, oerrno; | ||
69 | |||
70 | retval = -1; | ||
71 | |||
72 | /* Setup data structures */ | ||
73 | /* XXX memset(3) isn't async-safe according to signal(7) */ | ||
74 | (void)memset(&act, 0, sizeof(act)); | ||
75 | act.sa_handler = SIG_DFL; | ||
76 | act.sa_flags = 0; | ||
77 | if ((sigemptyset(&act.sa_mask) == -1) || | ||
78 | (sigfillset(&fullmask) == -1) || | ||
79 | (sigemptyset(&mask) == -1) || | ||
80 | (sigaddset(&mask, sig) == -1)) | ||
81 | goto restore_none; | ||
82 | |||
83 | /* Block all signals */ | ||
84 | if (sigprocmask(SIG_BLOCK, &fullmask, &origmask) == -1) | ||
85 | goto restore_none; | ||
86 | /* (use 'goto restore_mask' to restore state) */ | ||
87 | |||
88 | /* Enable the SIG_DFL handler */ | ||
89 | if (sigaction(sig, &act, &origact) == -1) | ||
90 | goto restore_mask; | ||
91 | /* (use 'goto restore_act' to restore state) */ | ||
92 | |||
93 | /* Raise the signal, and unblock the signal to deliver it */ | ||
94 | if ((raise(sig) == -1) || | ||
95 | (sigprocmask(SIG_UNBLOCK, &mask, NULL) == -1)) | ||
96 | goto restore_act; | ||
97 | |||
98 | /* Flag successful raise() */ | ||
99 | retval = 0; | ||
100 | |||
101 | /* Restore the original handler */ | ||
102 | restore_act: | ||
103 | oerrno = errno; | ||
104 | (void)sigaction(sig, &origact, NULL); | ||
105 | errno = oerrno; | ||
106 | |||
107 | /* Restore the original mask */ | ||
108 | restore_mask: | ||
109 | oerrno = errno; | ||
110 | (void)sigprocmask(SIG_SETMASK, &origmask, NULL); | ||
111 | errno = oerrno; | ||
112 | |||
113 | restore_none: | ||
114 | return retval; | ||
115 | } | ||
116 | |||
117 | #endif /* ! HAVE_RAISE_DEFAULT_SIGNAL */ | ||