-/* Copyright (C) 1991-2003, 2004 Free Software Foundation, Inc.
+/* Copyright (C) 1991-2003, 2004, 2007, 2009 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
/*
* ISO C99 Standard: 7.14 Signal handling <signal.h>
#include <bits/types.h>
#include <bits/signum.h>
+/* Fake signal functions. */
+#define SIG_ERR ((__sighandler_t) -1) /* Error return. */
+#define SIG_DFL ((__sighandler_t) 0) /* Default action. */
+#define SIG_IGN ((__sighandler_t) 1) /* Ignore signal. */
+#ifdef __USE_UNIX98
+# define SIG_HOLD ((__sighandler_t) 2) /* Add signal to hold mask. */
+#endif
+/* Biggest signal number + 1 (including real-time signals). */
+#ifndef _NSIG /* if arch has not defined it in bits/signum.h... */
+# define _NSIG 65
+#endif
+#ifdef __USE_MISC
+# define NSIG _NSIG
+#endif
+/* Real-time signal range */
+#define SIGRTMIN (__libc_current_sigrtmin())
+#define SIGRTMAX (__libc_current_sigrtmax())
+/* These are the hard limits of the kernel. These values should not be
+ used directly at user level. */
+#ifndef __SIGRTMIN /* if arch has not defined it in bits/signum.h... */
+# define __SIGRTMIN 32
+#endif
+#define __SIGRTMAX (_NSIG - 1)
+
+
#if defined __USE_XOPEN || defined __USE_XOPEN2K
# ifndef __pid_t_defined
typedef __pid_t pid_t;
# define __pid_t_defined
+# endif
#endif
#ifdef __USE_XOPEN
-# endif
# ifndef __uid_t_defined
typedef __uid_t uid_t;
# define __uid_t_defined
# endif
#endif /* Unix98 */
+#if defined __USE_POSIX199309 && defined __UCLIBC_HAS_REALTIME__
+/* We need `struct timespec' later on. */
+# define __need_timespec
+# include <time.h>
+
+/* Get the `siginfo_t' type plus the needed symbols. */
+# include <bits/siginfo.h>
+#endif
+
/* Type of a signal handler. */
typedef void (*__sighandler_t) (int);
+#if defined __UCLIBC_HAS_OBSOLETE_SYSV_SIGNAL__
/* The X/Open definition of `signal' specifies the SVID semantic. Use
the additional function `sysv_signal' when X/Open compatibility is
requested. */
extern __sighandler_t __sysv_signal (int __sig, __sighandler_t __handler)
__THROW;
-#ifdef __USE_GNU
+# ifdef __USE_GNU
extern __sighandler_t sysv_signal (int __sig, __sighandler_t __handler)
__THROW;
-#endif
+# endif
+#endif /* __UCLIBC_HAS_OBSOLETE_SYSV_SIGNAL__ */
/* Set the handler for the signal SIG to HANDLER, returning the old
handler, or SIG_ERR on error.
By default `signal' has the BSD semantic. */
__BEGIN_NAMESPACE_STD
-#ifdef __USE_BSD
+#if defined __USE_BSD || !defined __UCLIBC_HAS_OBSOLETE_SYSV_SIGNAL__
extern __sighandler_t signal (int __sig, __sighandler_t __handler)
__THROW;
+libc_hidden_proto(signal)
#else
/* Make sure the used `signal' implementation is the SVID version. */
-# ifdef __REDIRECT
-extern __sighandler_t __REDIRECT (signal,
+# ifdef __REDIRECT_NTH
+extern __sighandler_t __REDIRECT_NTH (signal,
(int __sig, __sighandler_t __handler),
__sysv_signal);
# else
#endif
__END_NAMESPACE_STD
-#ifdef __USE_XOPEN
+#if defined __USE_XOPEN && defined __UCLIBC_SUSV3_LEGACY__
/* The X/Open definition of `signal' conflicts with the BSD version.
So they defined another function `bsd_signal'. */
extern __sighandler_t bsd_signal (int __sig, __sighandler_t __handler)
If PID is < -1, send SIG to all processes in process group - PID. */
#ifdef __USE_POSIX
extern int kill (__pid_t __pid, int __sig) __THROW;
-#endif /* Use POSIX. */
+libc_hidden_proto(kill)
+#endif
#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
/* Send SIG to all processes in process group PGRP.
If PGRP is zero, send SIG to all processes in
the current process's process group. */
extern int killpg (__pid_t __pgrp, int __sig) __THROW;
-#endif /* Use BSD || X/Open Unix. */
+#endif
__BEGIN_NAMESPACE_STD
/* Raise signal SIG, i.e., send SIG to yourself. */
extern int raise (int __sig) __THROW;
+libc_hidden_proto(raise)
__END_NAMESPACE_STD
-#ifdef __USE_SVID
+#if 0 /*def __USE_SVID*/
/* SVID names for the same things. */
extern __sighandler_t ssignal (int __sig, __sighandler_t __handler)
__THROW;
extern int gsignal (int __sig) __THROW;
#endif /* Use SVID. */
-#ifdef __USE_MISC
+/* glibc guards the next two wrong with __USE_XOPEN2K */
+#if defined __USE_MISC || defined __USE_XOPEN2K8
/* Print a message describing the meaning of the given signal number. */
-extern void psignal (int __sig, __const char *__s);
-#endif /* Use misc. */
+extern void psignal (int __sig, const char *__s);
+#endif /* Use misc or POSIX 2008. */
+#if 0 /*def __USE_XOPEN2K8*/
+/* Print a message describing the meaning of the given signal information. */
+extern void psiginfo (const siginfo_t *__pinfo, const char *__s);
+#endif /* POSIX 2008. */
+#ifdef __UCLIBC_SUSV4_LEGACY__
/* The `sigpause' function has two different interfaces. The original
BSD definition defines the argument as a mask of the signal, while
the more modern interface in X/Open defines it as the signal
This function is a cancellation point and therefore not marked with
__THROW. */
-extern int __sigpause (int __sig_or_mask, int __is_sig);
+/*extern int __sigpause (int __sig_or_mask, int __is_sig);*/
#ifdef __FAVOR_BSD
/* Set the mask of blocked signals to MASK,
wait for a signal to arrive, and then restore the mask. */
-extern int sigpause (int __mask) __THROW __attribute_deprecated__;
-# define sigpause(mask) __sigpause ((mask), 0)
+/*extern int sigpause (int __mask) __THROW __attribute_deprecated__;
+# define sigpause(mask) __sigpause ((mask), 0)*/
+/* uClibc note: BSD sigpause is available as __bsd_sigpause.
+ * It is intentionally not prototyped */
#else
# ifdef __USE_XOPEN
/* Remove a signal from the signal mask and suspend the process. */
-# define sigpause(sig) __sigpause ((sig), 1)
+extern int sigpause(int __sig);
+/*# define sigpause(sig) __sigpause ((sig), 1)*/
# endif
#endif
+#endif /* __UCLIBC_SUSV4_LEGACY__ */
-
-#ifdef __USE_BSD
+#if 0 /*def __USE_BSD*/
/* None of the following functions should be used anymore. They are here
only for compatibility. A single word (`int') is not guaranteed to be
enough to hold a complete signal mask and therefore these functions
#endif /* Use BSD. */
-#ifdef __USE_MISC
-# define NSIG _NSIG
-#endif
-
#ifdef __USE_GNU
typedef __sighandler_t sighandler_t;
#endif
#ifdef __USE_POSIX
-# ifdef __USE_POSIX199309
-/* We need `struct timespec' later on. */
-# define __need_timespec
-# include <time.h>
-
-/* Get the `siginfo_t' type plus the needed symbols. */
-# include <bits/siginfo.h>
-# endif
-
/* Clear all signals from SET. */
extern int sigemptyset (sigset_t *__set) __THROW __nonnull ((1));
/* Add SIGNO to SET. */
extern int sigaddset (sigset_t *__set, int __signo) __THROW __nonnull ((1));
+libc_hidden_proto(sigaddset)
/* Remove SIGNO from SET. */
extern int sigdelset (sigset_t *__set, int __signo) __THROW __nonnull ((1));
+libc_hidden_proto(sigdelset)
/* Return 1 if SIGNO is in SET, 0 if not. */
-extern int sigismember (__const sigset_t *__set, int __signo)
+extern int sigismember (const sigset_t *__set, int __signo)
__THROW __nonnull ((1));
# ifdef __USE_GNU
/* Return non-empty value is SET is not empty. */
-extern int sigisemptyset (__const sigset_t *__set) __THROW __nonnull ((1));
+extern int sigisemptyset (const sigset_t *__set) __THROW __nonnull ((1));
/* Build new signal set by combining the two inputs set using logical AND. */
-extern int sigandset (sigset_t *__set, __const sigset_t *__left,
- __const sigset_t *__right) __THROW __nonnull ((1, 2, 3));
+extern int sigandset (sigset_t *__set, const sigset_t *__left,
+ const sigset_t *__right) __THROW __nonnull ((1, 2, 3));
/* Build new signal set by combining the two inputs set using logical OR. */
-extern int sigorset (sigset_t *__set, __const sigset_t *__left,
- __const sigset_t *__right) __THROW __nonnull ((1, 2, 3));
+extern int sigorset (sigset_t *__set, const sigset_t *__left,
+ const sigset_t *__right) __THROW __nonnull ((1, 2, 3));
# endif /* GNU */
/* Get the system-specific definitions of `struct sigaction'
# include <bits/sigaction.h>
/* Get and/or change the set of blocked signals. */
-extern int sigprocmask (int __how, __const sigset_t *__restrict __set,
+extern int sigprocmask (int __how, const sigset_t *__restrict __set,
sigset_t *__restrict __oset) __THROW;
+libc_hidden_proto(sigprocmask)
/* Change the set of blocked signals to SET,
wait until a signal arrives, and restore the set of blocked signals.
This function is a cancellation point and therefore not marked with
__THROW. */
-extern int sigsuspend (__const sigset_t *__set) __nonnull ((1));
+extern int sigsuspend (const sigset_t *__set) __nonnull ((1));
+#ifdef _LIBC
+extern __typeof(sigsuspend) __sigsuspend_nocancel attribute_hidden;
+libc_hidden_proto(sigsuspend)
+#endif
/* Get and/or set the action for signal SIG. */
-extern int sigaction (int __sig, __const struct sigaction *__restrict __act,
+extern int sigaction (int __sig, const struct sigaction *__restrict __act,
struct sigaction *__restrict __oact) __THROW;
+#ifdef _LIBC
+# if 0 /* this is in headers */
+/* In uclibc, userspace struct sigaction is identical to
+ * "new" struct kernel_sigaction (one from the Linux 2.1.68 kernel).
+ * See sigaction.h
+ */
+struct old_kernel_sigaction;
+extern int __syscall_sigaction(int, const struct old_kernel_sigaction *,
+ struct old_kernel_sigaction *) attribute_hidden;
+# else /* this is how the function is built */
+extern __typeof(sigaction) __syscall_sigaction attribute_hidden;
+# endif
+# define __need_size_t
+# include <stddef.h>
+/* candidate for attribute_hidden, if NPTL would behave */
+extern int __syscall_rt_sigaction(int, const struct sigaction *,
+ struct sigaction *, size_t)
+# ifndef __UCLIBC_HAS_THREADS_NATIVE__
+ attribute_hidden
+# endif
+ ;
+extern __typeof(sigaction) __libc_sigaction;
+libc_hidden_proto(sigaction)
+
+# ifdef __mips__
+# define _KERNEL_NSIG_WORDS (_NSIG / _MIPS_SZLONG)
+typedef struct {
+ unsigned long sig[_KERNEL_NSIG_WORDS];
+} kernel_sigset_t;
+# define __SYSCALL_SIGSET_T_SIZE (sizeof(kernel_sigset_t))
+# else
+# define __SYSCALL_SIGSET_T_SIZE (_NSIG / 8)
+# endif
+#endif
/* Put in SET all signals that are blocked and waiting to be delivered. */
extern int sigpending (sigset_t *__set) __THROW __nonnull ((1));
This function is a cancellation point and therefore not marked with
__THROW. */
-extern int sigwait (__const sigset_t *__restrict __set, int *__restrict __sig)
+extern int sigwait (const sigset_t *__restrict __set, int *__restrict __sig)
__nonnull ((1, 2));
-# ifdef __USE_POSIX199309
+# if defined __USE_POSIX199309 && defined __UCLIBC_HAS_REALTIME__
/* Select any of pending signals from SET and place information in INFO.
This function is a cancellation point and therefore not marked with
__THROW. */
-extern int sigwaitinfo (__const sigset_t *__restrict __set,
+extern int sigwaitinfo (const sigset_t *__restrict __set,
siginfo_t *__restrict __info) __nonnull ((1));
+#ifdef _LIBC
+extern __typeof(sigwaitinfo) __sigwaitinfo attribute_hidden;
+#endif
/* Select any of pending signals from SET and place information in INFO.
Wait the time specified by TIMEOUT if no signal is pending.
This function is a cancellation point and therefore not marked with
__THROW. */
-extern int sigtimedwait (__const sigset_t *__restrict __set,
+extern int sigtimedwait (const sigset_t *__restrict __set,
siginfo_t *__restrict __info,
- __const struct timespec *__restrict __timeout)
+ const struct timespec *__restrict __timeout)
__nonnull ((1));
+#ifdef _LIBC
+extern __typeof(sigtimedwait) __sigtimedwait_nocancel attribute_hidden;
+libc_hidden_proto(sigtimedwait)
+#endif
/* Send signal SIG to the process PID. Associate data in VAL with the
signal. */
-extern int sigqueue (__pid_t __pid, int __sig, __const union sigval __val)
+extern int sigqueue (__pid_t __pid, int __sig, const union sigval __val)
__THROW;
# endif /* Use POSIX 199306. */
#ifdef __USE_BSD
-#ifdef __UCLIBC_HAS_SYS_SIGLIST__
+# ifdef __UCLIBC_HAS_SYS_SIGLIST__
/* Names of the signals. This variable exists only for compatibility.
Use `strsignal' instead (see <string.h>). */
-#define _sys_siglist sys_siglist
-extern __const char *__const sys_siglist[_NSIG];
-#endif /* __UCLIBC_HAS_SYS_SIGLIST__ */
+# define _sys_siglist sys_siglist
+extern const char *const sys_siglist[_NSIG];
+# endif
+#ifndef __UCLIBC_STRICT_HEADERS__
/* Structure passed to `sigvec'. */
struct sigvec
{
# define SV_ONSTACK (1 << 0)/* Take the signal on the signal stack. */
# define SV_INTERRUPT (1 << 1)/* Do not restart system calls. */
# define SV_RESETHAND (1 << 2)/* Reset handler to SIG_DFL on receipt. */
+#endif
+#if 0
/* If VEC is non-NULL, set the handler for SIG to the `sv_handler' member
of VEC. The signals in `sv_mask' will be blocked while the handler runs.
If the SV_RESETHAND bit is set in `sv_flags', the handler for SIG will be
reset to SIG_DFL before `sv_handler' is entered. If OVEC is non-NULL,
it is filled in with the old information for SIG. */
-extern int sigvec (int __sig, __const struct sigvec *__vec,
+extern int sigvec (int __sig, const struct sigvec *__vec,
struct sigvec *__ovec) __THROW;
+#endif
/* Get machine-dependent `struct sigcontext' and signal subcodes. */
# include <bits/sigcontext.h>
+#if 0
/* Restore the state saved in SCP. */
extern int sigreturn (struct sigcontext *__scp) __THROW;
+#endif
#endif /* use BSD. */
#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
+# define __need_size_t
+# include <stddef.h>
+# ifdef __UCLIBC_SUSV4_LEGACY__
/* If INTERRUPT is nonzero, make signal SIG interrupt system calls
(causing them to fail with EINTR); if INTERRUPT is zero, make system
calls be restarted after signal SIG. */
extern int siginterrupt (int __sig, int __interrupt) __THROW;
+# endif
# include <bits/sigstack.h>
# ifdef __USE_XOPEN
/* This will define `ucontext_t' and `mcontext_t'. */
-# include <ucontext.h>
+/* SuSv4 obsoleted include/ucontext.h */
+# include <sys/ucontext.h>
# endif
+# if 0
/* Run signals handlers on the stack specified by SS (if not NULL).
If OSS is not NULL, it is filled in with the old signal stack status.
This interface is obsolete and on many platform not implemented. */
extern int sigstack (struct sigstack *__ss, struct sigstack *__oss)
__THROW __attribute_deprecated__;
+# endif
/* Alternate signal handler stack interface.
This interface should always be preferred over `sigstack'. */
-extern int sigaltstack (__const struct sigaltstack *__restrict __ss,
+extern int sigaltstack (const struct sigaltstack *__restrict __ss,
struct sigaltstack *__restrict __oss) __THROW;
#endif /* use BSD or X/Open Unix. */
-#ifdef __USE_XOPEN_EXTENDED
+#if defined __USE_XOPEN_EXTENDED && defined __UCLIBC_HAS_OBSOLETE_BSD_SIGNAL__
/* Simplified interface for signal management. */
/* Add SIG to the calling process' signal mask. */
be defined here. */
# include <bits/pthreadtypes.h>
# include <bits/sigthread.h>
-#endif /* use Unix98 */
+#endif
/* The following functions are used internally in the C library and in
other code which need deep insights. */
/* Return number of available real-time signal with lowest priority. */
extern int __libc_current_sigrtmax (void) __THROW;
+#ifdef _LIBC
+extern sigset_t _sigintr attribute_hidden;
+/* simplified version without parameter checking */
+# include <string.h>
+# undef __sigemptyset
+# define __sigemptyset(ss) (memset(ss, '\0', sizeof(sigset_t)), 0)
+#endif
#endif /* signal.h */
__END_DECLS
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