/* A GNU-like <signal.h>.
- Copyright (C) 2006-2007 Free Software Foundation, Inc.
+ Copyright (C) 2006-2009 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+
#if defined __need_sig_atomic_t || defined __need_sigset_t
/* Special invocation convention inside glibc header files. */
/* The definition of GL_LINK_WARNING is copied here. */
+/* Define pid_t, uid_t.
+ Also, mingw defines sigset_t not in <signal.h>, but in <sys/types.h>. */
+#include <sys/types.h>
+
+/* On AIX, sig_atomic_t already includes volatile. C99 requires that
+ 'volatile sig_atomic_t' ignore the extra modifier, but C89 did not.
+ Hence, redefine this to a non-volatile type as needed. */
+#if ! @HAVE_TYPE_VOLATILE_SIG_ATOMIC_T@
+typedef int rpl_sig_atomic_t;
+# undef sig_atomic_t
+# define sig_atomic_t rpl_sig_atomic_t
+#endif
#ifdef __cplusplus
extern "C" {
#endif
-#if !@HAVE_POSIX_SIGNALBLOCKING@
+#if @GNULIB_SIGNAL_H_SIGPIPE@
+# ifndef SIGPIPE
+/* Define SIGPIPE to a value that does not overlap with other signals. */
+# define SIGPIPE 13
+# define GNULIB_defined_SIGPIPE 1
+/* To actually use SIGPIPE, you also need the gnulib modules 'sigprocmask',
+ 'write', 'stdio'. */
+# endif
+#endif
-/* Mingw defines sigset_t not in <signal.h>, but in <sys/types.h>. */
-# include <sys/types.h>
+
+#if !@HAVE_POSIX_SIGNALBLOCKING@
/* Maximum signal number + 1. */
# ifndef NSIG
# define SIG_UNBLOCK 2 /* blocked_set = blocked_set & ~*set; */
extern int sigprocmask (int operation, const sigset_t *set, sigset_t *old_set);
+# define signal rpl_signal
+/* Install the handler FUNC for signal SIG, and return the previous
+ handler. */
+extern void (*signal (int sig, void (*func) (int))) (int);
+
+# if GNULIB_defined_SIGPIPE
+
+/* Raise signal SIG. */
+# undef raise
+# define raise rpl_raise
+extern int raise (int sig);
+
+# endif
+
+#endif /* !@HAVE_POSIX_SIGNALBLOCKING@ */
+
+
+#if !@HAVE_SIGACTION@
+
+# if !@HAVE_SIGINFO_T@
+/* Present to allow compilation, but unsupported by gnulib. */
+union sigval
+{
+ int sival_int;
+ void *sival_ptr;
+};
+
+/* Present to allow compilation, but unsupported by gnulib. */
+struct siginfo_t
+{
+ int si_signo;
+ int si_code;
+ int si_errno;
+ pid_t si_pid;
+ uid_t si_uid;
+ void *si_addr;
+ int si_status;
+ long si_band;
+ union sigval si_value;
+};
+typedef struct siginfo_t siginfo_t;
+# endif /* !@HAVE_SIGINFO_T@ */
+
+/* We assume that platforms which lack the sigaction() function also lack
+ the 'struct sigaction' type, and vice versa. */
+
+struct sigaction
+{
+ union
+ {
+ void (*_sa_handler) (int);
+ /* Present to allow compilation, but unsupported by gnulib. POSIX
+ says that implementations may, but not must, make sa_sigaction
+ overlap with sa_handler, but we know of no implementation where
+ they do not overlap. */
+ void (*_sa_sigaction) (int, siginfo_t *, void *);
+ } _sa_func;
+ sigset_t sa_mask;
+ /* Not all POSIX flags are supported. */
+ int sa_flags;
+};
+# define sa_handler _sa_func._sa_handler
+# define sa_sigaction _sa_func._sa_sigaction
+/* Unsupported flags are not present. */
+# define SA_RESETHAND 1
+# define SA_NODEFER 2
+# define SA_RESTART 4
+
+extern int sigaction (int, const struct sigaction *restrict,
+ struct sigaction *restrict);
+
+#elif !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@
+
+# define sa_sigaction sa_handler
+
+#endif /* !@HAVE_SIGACTION@, !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@ */
+
+
+/* Some systems don't have SA_NODEFER. */
+#ifndef SA_NODEFER
+# define SA_NODEFER 0
#endif