203 lines
5.4 KiB
C
203 lines
5.4 KiB
C
/* A GNU-like <signal.h>.
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Copyright (C) 2006-2009 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#if __GNUC__ >= 3
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@PRAGMA_SYSTEM_HEADER@
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#endif
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#if defined __need_sig_atomic_t || defined __need_sigset_t
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/* Special invocation convention inside glibc header files. */
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# @INCLUDE_NEXT@ @NEXT_SIGNAL_H@
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#else
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/* Normal invocation convention. */
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#ifndef _GL_SIGNAL_H
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/* The include_next requires a split double-inclusion guard. */
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#@INCLUDE_NEXT@ @NEXT_SIGNAL_H@
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#ifndef _GL_SIGNAL_H
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#define _GL_SIGNAL_H
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/* The definition of GL_LINK_WARNING is copied here. */
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/* Define pid_t, uid_t.
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Also, mingw defines sigset_t not in <signal.h>, but in <sys/types.h>. */
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#include <sys/types.h>
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/* On AIX, sig_atomic_t already includes volatile. C99 requires that
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'volatile sig_atomic_t' ignore the extra modifier, but C89 did not.
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Hence, redefine this to a non-volatile type as needed. */
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#if ! @HAVE_TYPE_VOLATILE_SIG_ATOMIC_T@
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typedef int rpl_sig_atomic_t;
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# undef sig_atomic_t
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# define sig_atomic_t rpl_sig_atomic_t
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if @GNULIB_SIGNAL_H_SIGPIPE@
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# ifndef SIGPIPE
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/* Define SIGPIPE to a value that does not overlap with other signals. */
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# define SIGPIPE 13
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# define GNULIB_defined_SIGPIPE 1
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/* To actually use SIGPIPE, you also need the gnulib modules 'sigprocmask',
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'write', 'stdio'. */
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# endif
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#endif
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#if !@HAVE_POSIX_SIGNALBLOCKING@
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/* Maximum signal number + 1. */
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# ifndef NSIG
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# define NSIG 32
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# endif
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/* This code supports only 32 signals. */
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typedef int verify_NSIG_constraint[2 * (NSIG <= 32) - 1];
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/* A set or mask of signals. */
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# if !@HAVE_SIGSET_T@
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typedef unsigned int sigset_t;
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# endif
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/* Test whether a given signal is contained in a signal set. */
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extern int sigismember (const sigset_t *set, int sig);
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/* Initialize a signal set to the empty set. */
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extern int sigemptyset (sigset_t *set);
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/* Add a signal to a signal set. */
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extern int sigaddset (sigset_t *set, int sig);
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/* Remove a signal from a signal set. */
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extern int sigdelset (sigset_t *set, int sig);
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/* Fill a signal set with all possible signals. */
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extern int sigfillset (sigset_t *set);
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/* Return the set of those blocked signals that are pending. */
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extern int sigpending (sigset_t *set);
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/* If OLD_SET is not NULL, put the current set of blocked signals in *OLD_SET.
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Then, if SET is not NULL, affect the current set of blocked signals by
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combining it with *SET as indicated in OPERATION.
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In this implementation, you are not allowed to change a signal handler
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while the signal is blocked. */
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# define SIG_BLOCK 0 /* blocked_set = blocked_set | *set; */
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# define SIG_SETMASK 1 /* blocked_set = *set; */
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# define SIG_UNBLOCK 2 /* blocked_set = blocked_set & ~*set; */
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extern int sigprocmask (int operation, const sigset_t *set, sigset_t *old_set);
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# define signal rpl_signal
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/* Install the handler FUNC for signal SIG, and return the previous
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handler. */
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extern void (*signal (int sig, void (*func) (int))) (int);
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# if GNULIB_defined_SIGPIPE
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/* Raise signal SIG. */
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# undef raise
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# define raise rpl_raise
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extern int raise (int sig);
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# endif
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#endif /* !@HAVE_POSIX_SIGNALBLOCKING@ */
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#if !@HAVE_SIGACTION@
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# if !@HAVE_SIGINFO_T@
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/* Present to allow compilation, but unsupported by gnulib. */
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union sigval
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{
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int sival_int;
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void *sival_ptr;
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};
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/* Present to allow compilation, but unsupported by gnulib. */
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struct siginfo_t
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{
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int si_signo;
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int si_code;
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int si_errno;
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pid_t si_pid;
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uid_t si_uid;
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void *si_addr;
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int si_status;
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long si_band;
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union sigval si_value;
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};
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typedef struct siginfo_t siginfo_t;
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# endif /* !@HAVE_SIGINFO_T@ */
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/* We assume that platforms which lack the sigaction() function also lack
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the 'struct sigaction' type, and vice versa. */
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struct sigaction
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{
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union
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{
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void (*_sa_handler) (int);
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/* Present to allow compilation, but unsupported by gnulib. POSIX
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says that implementations may, but not must, make sa_sigaction
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overlap with sa_handler, but we know of no implementation where
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they do not overlap. */
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void (*_sa_sigaction) (int, siginfo_t *, void *);
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} _sa_func;
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sigset_t sa_mask;
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/* Not all POSIX flags are supported. */
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int sa_flags;
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};
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# define sa_handler _sa_func._sa_handler
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# define sa_sigaction _sa_func._sa_sigaction
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/* Unsupported flags are not present. */
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# define SA_RESETHAND 1
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# define SA_NODEFER 2
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# define SA_RESTART 4
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extern int sigaction (int, const struct sigaction *restrict,
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struct sigaction *restrict);
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#elif !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@
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# define sa_sigaction sa_handler
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#endif /* !@HAVE_SIGACTION@, !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@ */
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/* Some systems don't have SA_NODEFER. */
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#ifndef SA_NODEFER
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# define SA_NODEFER 0
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* _GL_SIGNAL_H */
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#endif /* _GL_SIGNAL_H */
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#endif
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