1
/* A GNU-like <signal.h>.
3
Copyright (C) 2006-2009 Free Software Foundation, Inc.
5
This program is free software: you can redistribute it and/or modify
6
it under the terms of the GNU General Public License as published by
7
the Free Software Foundation; either version 3 of the License, or
8
(at your option) any later version.
10
This program is distributed in the hope that it will be useful,
11
but WITHOUT ANY WARRANTY; without even the implied warranty of
12
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13
GNU General Public License for more details.
15
You should have received a copy of the GNU General Public License
16
along with this program. If not, see <http://www.gnu.org/licenses/>. */
19
@PRAGMA_SYSTEM_HEADER@
22
#if defined __need_sig_atomic_t || defined __need_sigset_t
23
/* Special invocation convention inside glibc header files. */
25
# @INCLUDE_NEXT@ @NEXT_SIGNAL_H@
28
/* Normal invocation convention. */
32
/* The include_next requires a split double-inclusion guard. */
33
#@INCLUDE_NEXT@ @NEXT_SIGNAL_H@
38
/* The definition of GL_LINK_WARNING is copied here. */
40
/* Define pid_t, uid_t.
41
Also, mingw defines sigset_t not in <signal.h>, but in <sys/types.h>. */
42
#include <sys/types.h>
44
/* On AIX, sig_atomic_t already includes volatile. C99 requires that
45
'volatile sig_atomic_t' ignore the extra modifier, but C89 did not.
46
Hence, redefine this to a non-volatile type as needed. */
47
#if ! @HAVE_TYPE_VOLATILE_SIG_ATOMIC_T@
48
typedef int rpl_sig_atomic_t;
50
# define sig_atomic_t rpl_sig_atomic_t
58
#if @GNULIB_SIGNAL_H_SIGPIPE@
60
/* Define SIGPIPE to a value that does not overlap with other signals. */
62
# define GNULIB_defined_SIGPIPE 1
63
/* To actually use SIGPIPE, you also need the gnulib modules 'sigprocmask',
69
#if !@HAVE_POSIX_SIGNALBLOCKING@
71
/* Maximum signal number + 1. */
76
/* This code supports only 32 signals. */
77
typedef int verify_NSIG_constraint[2 * (NSIG <= 32) - 1];
79
/* A set or mask of signals. */
81
typedef unsigned int sigset_t;
84
/* Test whether a given signal is contained in a signal set. */
85
extern int sigismember (const sigset_t *set, int sig);
87
/* Initialize a signal set to the empty set. */
88
extern int sigemptyset (sigset_t *set);
90
/* Add a signal to a signal set. */
91
extern int sigaddset (sigset_t *set, int sig);
93
/* Remove a signal from a signal set. */
94
extern int sigdelset (sigset_t *set, int sig);
96
/* Fill a signal set with all possible signals. */
97
extern int sigfillset (sigset_t *set);
99
/* Return the set of those blocked signals that are pending. */
100
extern int sigpending (sigset_t *set);
102
/* If OLD_SET is not NULL, put the current set of blocked signals in *OLD_SET.
103
Then, if SET is not NULL, affect the current set of blocked signals by
104
combining it with *SET as indicated in OPERATION.
105
In this implementation, you are not allowed to change a signal handler
106
while the signal is blocked. */
107
# define SIG_BLOCK 0 /* blocked_set = blocked_set | *set; */
108
# define SIG_SETMASK 1 /* blocked_set = *set; */
109
# define SIG_UNBLOCK 2 /* blocked_set = blocked_set & ~*set; */
110
extern int sigprocmask (int operation, const sigset_t *set, sigset_t *old_set);
112
# define signal rpl_signal
113
/* Install the handler FUNC for signal SIG, and return the previous
115
extern void (*signal (int sig, void (*func) (int))) (int);
117
# if GNULIB_defined_SIGPIPE
119
/* Raise signal SIG. */
121
# define raise rpl_raise
122
extern int raise (int sig);
126
#endif /* !@HAVE_POSIX_SIGNALBLOCKING@ */
129
#if !@HAVE_SIGACTION@
131
# if !@HAVE_SIGINFO_T@
132
/* Present to allow compilation, but unsupported by gnulib. */
139
/* Present to allow compilation, but unsupported by gnulib. */
150
union sigval si_value;
152
typedef struct siginfo_t siginfo_t;
153
# endif /* !@HAVE_SIGINFO_T@ */
155
/* We assume that platforms which lack the sigaction() function also lack
156
the 'struct sigaction' type, and vice versa. */
162
void (*_sa_handler) (int);
163
/* Present to allow compilation, but unsupported by gnulib. POSIX
164
says that implementations may, but not must, make sa_sigaction
165
overlap with sa_handler, but we know of no implementation where
166
they do not overlap. */
167
void (*_sa_sigaction) (int, siginfo_t *, void *);
170
/* Not all POSIX flags are supported. */
173
# define sa_handler _sa_func._sa_handler
174
# define sa_sigaction _sa_func._sa_sigaction
175
/* Unsupported flags are not present. */
176
# define SA_RESETHAND 1
177
# define SA_NODEFER 2
178
# define SA_RESTART 4
180
extern int sigaction (int, const struct sigaction *restrict,
181
struct sigaction *restrict);
183
#elif !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@
185
# define sa_sigaction sa_handler
187
#endif /* !@HAVE_SIGACTION@, !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@ */
190
/* Some systems don't have SA_NODEFER. */
192
# define SA_NODEFER 0
200
#endif /* _GL_SIGNAL_H */
201
#endif /* _GL_SIGNAL_H */