/* A GNU-like . Copyright (C) 2006-2024 Free Software Foundation, Inc. This file is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This file is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this program. If not, see . */ #if __GNUC__ >= 3 @PRAGMA_SYSTEM_HEADER@ #endif @PRAGMA_COLUMNS@ #if defined __need_sig_atomic_t || defined __need_sigset_t || defined _GL_ALREADY_INCLUDING_SIGNAL_H || (defined _SIGNAL_H && !defined __SIZEOF_PTHREAD_MUTEX_T) /* Special invocation convention: - Inside glibc header files. - On glibc systems we have a sequence of nested includes -> -> . In this situation, the functions are not yet declared, therefore we cannot provide the C++ aliases. - On glibc systems with GCC 4.3 we have a sequence of nested includes -> -> -> . In this situation, some of the functions are not yet declared, therefore we cannot provide the C++ aliases. */ # @INCLUDE_NEXT@ @NEXT_SIGNAL_H@ #else /* Normal invocation convention. */ #ifndef _@GUARD_PREFIX@_SIGNAL_H #define _GL_ALREADY_INCLUDING_SIGNAL_H /* Define pid_t, uid_t. Also, mingw defines sigset_t not in , but in . On Solaris 10, includes , which eventually includes us; so include now, before the second inclusion guard. */ #include /* The include_next requires a split double-inclusion guard. */ #@INCLUDE_NEXT@ @NEXT_SIGNAL_H@ #undef _GL_ALREADY_INCLUDING_SIGNAL_H #ifndef _@GUARD_PREFIX@_SIGNAL_H #define _@GUARD_PREFIX@_SIGNAL_H /* This file uses GNULIB_POSIXCHECK, HAVE_RAW_DECL_*. */ #if !_GL_CONFIG_H_INCLUDED #error "Please include config.h first." #endif /* For testing the OpenBSD version. */ #if (@GNULIB_PTHREAD_SIGMASK@ || defined GNULIB_POSIXCHECK) \ && defined __OpenBSD__ # include #endif /* Mac OS X 10.3, FreeBSD < 8.0, OpenBSD < 5.1, OSF/1 4.0, Solaris 2.6, Android, OS/2 kLIBC declare pthread_sigmask in , not in . But avoid namespace pollution on glibc systems.*/ #if (@GNULIB_PTHREAD_SIGMASK@ || defined GNULIB_POSIXCHECK) \ && ((defined __APPLE__ && defined __MACH__) \ || (defined __FreeBSD__ && __FreeBSD__ < 8) \ || (defined __OpenBSD__ && OpenBSD < 201205) \ || defined __osf__ || defined __sun || defined __ANDROID__ \ || defined __KLIBC__) \ && ! defined __GLIBC__ # include #endif /* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */ /* The definition of _GL_ARG_NONNULL is copied here. */ /* The definition of _GL_WARN_ON_USE is copied here. */ /* 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@ # if !GNULIB_defined_sig_atomic_t typedef int rpl_sig_atomic_t; # undef sig_atomic_t # define sig_atomic_t rpl_sig_atomic_t # define GNULIB_defined_sig_atomic_t 1 # endif #endif /* A set or mask of signals. */ #if !@HAVE_SIGSET_T@ # if !GNULIB_defined_sigset_t typedef unsigned int sigset_t; # define GNULIB_defined_sigset_t 1 # endif #endif /* Define sighandler_t, the type of signal handlers. A GNU extension. */ #if !@HAVE_SIGHANDLER_T@ # ifdef __cplusplus extern "C" { # endif # if !GNULIB_defined_sighandler_t typedef void (*sighandler_t) (int); # define GNULIB_defined_sighandler_t 1 # endif # ifdef __cplusplus } # endif #endif #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 /* Maximum signal number + 1. */ #ifndef NSIG # if defined __TANDEM # define NSIG 32 # endif #endif /* Maximum size of a signal name returned by sig2str(), including the terminating NUL byte. */ #ifndef SIG2STR_MAX /* The longest one: "RTMAX", then "+" or "-", then up to 10 digits, then NUL. Add + 2 as a reserve for the future. */ # define SIG2STR_MAX (5 + 1 + 10 + 1 + 2) #endif #if @GNULIB_SIG2STR@ # if !@HAVE_SIG2STR@ _GL_FUNCDECL_SYS (sig2str, int, (int signo, char *str), ); # endif _GL_CXXALIAS_SYS (sig2str, int, (int signo, char *str)); # if __GLIBC__ >= 2 _GL_CXXALIASWARN (sig2str); # endif #elif defined GNULIB_POSIXCHECK # undef sig2str # if HAVE_RAW_DECL_SIG2STR _GL_WARN_ON_USE (sig2str, "sig2str is not portable - " "use gnulib module sig2str for portability"); # endif #endif #if @GNULIB_SIG2STR@ # if !@HAVE_STR2SIG@ _GL_FUNCDECL_SYS (str2sig, int, (char const *str, int *signo_p), ); # endif _GL_CXXALIAS_SYS (str2sig, int, (char const *str, int *signo_p)); # if __GLIBC__ >= 2 _GL_CXXALIASWARN (str2sig); # endif #elif defined GNULIB_POSIXCHECK # undef str2sig # if HAVE_RAW_DECL_STR2SIG _GL_WARN_ON_USE (str2sig, "str2sig is not portable - " "use gnulib module sig2str for portability"); # endif #endif #if @GNULIB_PTHREAD_SIGMASK@ # if @REPLACE_PTHREAD_SIGMASK@ # if !(defined __cplusplus && defined GNULIB_NAMESPACE) # undef pthread_sigmask # define pthread_sigmask rpl_pthread_sigmask # endif _GL_FUNCDECL_RPL (pthread_sigmask, int, (int how, const sigset_t *restrict new_mask, sigset_t *restrict old_mask), ); _GL_CXXALIAS_RPL (pthread_sigmask, int, (int how, const sigset_t *restrict new_mask, sigset_t *restrict old_mask)); # else # if !(@HAVE_PTHREAD_SIGMASK@ || defined pthread_sigmask) _GL_FUNCDECL_SYS (pthread_sigmask, int, (int how, const sigset_t *restrict new_mask, sigset_t *restrict old_mask), ); # endif _GL_CXXALIAS_SYS (pthread_sigmask, int, (int how, const sigset_t *restrict new_mask, sigset_t *restrict old_mask)); # endif # if __GLIBC__ >= 2 _GL_CXXALIASWARN (pthread_sigmask); # endif #elif defined GNULIB_POSIXCHECK # undef pthread_sigmask # if HAVE_RAW_DECL_PTHREAD_SIGMASK _GL_WARN_ON_USE (pthread_sigmask, "pthread_sigmask is not portable - " "use gnulib module pthread_sigmask for portability"); # endif #endif #if @GNULIB_RAISE@ # if @REPLACE_RAISE@ # if !(defined __cplusplus && defined GNULIB_NAMESPACE) # undef raise # define raise rpl_raise # endif _GL_FUNCDECL_RPL (raise, int, (int sig), ); _GL_CXXALIAS_RPL (raise, int, (int sig)); # else # if !@HAVE_RAISE@ _GL_FUNCDECL_SYS (raise, int, (int sig), ); # endif _GL_CXXALIAS_SYS (raise, int, (int sig)); # endif # if __GLIBC__ >= 2 _GL_CXXALIASWARN (raise); # endif #elif defined GNULIB_POSIXCHECK # undef raise /* Assume raise is always declared. */ _GL_WARN_ON_USE (raise, "raise can crash on native Windows - " "use gnulib module raise for portability"); #endif #if @GNULIB_SIGPROCMASK@ # if !@HAVE_POSIX_SIGNALBLOCKING@ # ifndef GNULIB_defined_signal_blocking # define GNULIB_defined_signal_blocking 1 # endif /* Maximum signal number + 1. */ # ifndef NSIG # define NSIG 32 # endif /* This code supports only 32 signals. */ # if !GNULIB_defined_verify_NSIG_constraint typedef int verify_NSIG_constraint[NSIG <= 32 ? 1 : -1]; # define GNULIB_defined_verify_NSIG_constraint 1 # endif # endif /* When also using extern inline, suppress the use of static inline in standard headers of problematic Apple configurations, as Libc at least through Libc-825.26 (2013-04-09) mishandles it; see, e.g., . Perhaps Apple will fix this some day. */ #if (defined _GL_EXTERN_INLINE_IN_USE && defined __APPLE__ \ && (defined __i386__ || defined __x86_64__)) # undef sigaddset # undef sigdelset # undef sigemptyset # undef sigfillset # undef sigismember #endif /* Test whether a given signal is contained in a signal set. */ # if @HAVE_POSIX_SIGNALBLOCKING@ /* This function is defined as a macro on Mac OS X. */ # if defined __cplusplus && defined GNULIB_NAMESPACE # undef sigismember # endif # else _GL_FUNCDECL_SYS (sigismember, int, (const sigset_t *set, int sig), _GL_ARG_NONNULL ((1))); # endif _GL_CXXALIAS_SYS (sigismember, int, (const sigset_t *set, int sig)); _GL_CXXALIASWARN (sigismember); /* Initialize a signal set to the empty set. */ # if @HAVE_POSIX_SIGNALBLOCKING@ /* This function is defined as a macro on Mac OS X. */ # if defined __cplusplus && defined GNULIB_NAMESPACE # undef sigemptyset # endif # else _GL_FUNCDECL_SYS (sigemptyset, int, (sigset_t *set), _GL_ARG_NONNULL ((1))); # endif _GL_CXXALIAS_SYS (sigemptyset, int, (sigset_t *set)); _GL_CXXALIASWARN (sigemptyset); /* Add a signal to a signal set. */ # if @HAVE_POSIX_SIGNALBLOCKING@ /* This function is defined as a macro on Mac OS X. */ # if defined __cplusplus && defined GNULIB_NAMESPACE # undef sigaddset # endif # else _GL_FUNCDECL_SYS (sigaddset, int, (sigset_t *set, int sig), _GL_ARG_NONNULL ((1))); # endif _GL_CXXALIAS_SYS (sigaddset, int, (sigset_t *set, int sig)); _GL_CXXALIASWARN (sigaddset); /* Remove a signal from a signal set. */ # if @HAVE_POSIX_SIGNALBLOCKING@ /* This function is defined as a macro on Mac OS X. */ # if defined __cplusplus && defined GNULIB_NAMESPACE # undef sigdelset # endif # else _GL_FUNCDECL_SYS (sigdelset, int, (sigset_t *set, int sig), _GL_ARG_NONNULL ((1))); # endif _GL_CXXALIAS_SYS (sigdelset, int, (sigset_t *set, int sig)); _GL_CXXALIASWARN (sigdelset); /* Fill a signal set with all possible signals. */ # if @HAVE_POSIX_SIGNALBLOCKING@ /* This function is defined as a macro on Mac OS X. */ # if defined __cplusplus && defined GNULIB_NAMESPACE # undef sigfillset # endif # else _GL_FUNCDECL_SYS (sigfillset, int, (sigset_t *set), _GL_ARG_NONNULL ((1))); # endif _GL_CXXALIAS_SYS (sigfillset, int, (sigset_t *set)); _GL_CXXALIASWARN (sigfillset); /* Return the set of those blocked signals that are pending. */ # if !@HAVE_POSIX_SIGNALBLOCKING@ _GL_FUNCDECL_SYS (sigpending, int, (sigset_t *set), _GL_ARG_NONNULL ((1))); # endif _GL_CXXALIAS_SYS (sigpending, int, (sigset_t *set)); _GL_CXXALIASWARN (sigpending); /* If OLD_SET is not NULL, put the current set of blocked signals in *OLD_SET. Then, if SET is not NULL, affect the current set of blocked signals by combining it with *SET as indicated in OPERATION. In this implementation, you are not allowed to change a signal handler while the signal is blocked. */ # if !@HAVE_POSIX_SIGNALBLOCKING@ # define SIG_BLOCK 0 /* blocked_set = blocked_set | *set; */ # define SIG_SETMASK 1 /* blocked_set = *set; */ # define SIG_UNBLOCK 2 /* blocked_set = blocked_set & ~*set; */ _GL_FUNCDECL_SYS (sigprocmask, int, (int operation, const sigset_t *restrict set, sigset_t *restrict old_set), ); # endif _GL_CXXALIAS_SYS (sigprocmask, int, (int operation, const sigset_t *restrict set, sigset_t *restrict old_set)); _GL_CXXALIASWARN (sigprocmask); /* Install the handler FUNC for signal SIG, and return the previous handler. */ # ifdef __cplusplus extern "C" { # endif # if !GNULIB_defined_function_taking_int_returning_void_t typedef void (*_gl_function_taking_int_returning_void_t) (int); # define GNULIB_defined_function_taking_int_returning_void_t 1 # endif # ifdef __cplusplus } # endif # if !@HAVE_POSIX_SIGNALBLOCKING@ # if !(defined __cplusplus && defined GNULIB_NAMESPACE) # define signal rpl_signal # endif _GL_FUNCDECL_RPL (signal, _gl_function_taking_int_returning_void_t, (int sig, _gl_function_taking_int_returning_void_t func), ); _GL_CXXALIAS_RPL (signal, _gl_function_taking_int_returning_void_t, (int sig, _gl_function_taking_int_returning_void_t func)); # else /* On OpenBSD, the declaration of 'signal' may not be present at this point, because it occurs in , not directly. */ # if defined __OpenBSD__ _GL_FUNCDECL_SYS (signal, _gl_function_taking_int_returning_void_t, (int sig, _gl_function_taking_int_returning_void_t func), ); # endif _GL_CXXALIAS_SYS (signal, _gl_function_taking_int_returning_void_t, (int sig, _gl_function_taking_int_returning_void_t func)); # endif # if __GLIBC__ >= 2 _GL_CXXALIASWARN (signal); # endif # if !@HAVE_POSIX_SIGNALBLOCKING@ && GNULIB_defined_SIGPIPE /* Raise signal SIGPIPE. */ _GL_EXTERN_C int _gl_raise_SIGPIPE (void); # endif #elif defined GNULIB_POSIXCHECK # undef sigaddset # if HAVE_RAW_DECL_SIGADDSET _GL_WARN_ON_USE (sigaddset, "sigaddset is unportable - " "use the gnulib module sigprocmask for portability"); # endif # undef sigdelset # if HAVE_RAW_DECL_SIGDELSET _GL_WARN_ON_USE (sigdelset, "sigdelset is unportable - " "use the gnulib module sigprocmask for portability"); # endif # undef sigemptyset # if HAVE_RAW_DECL_SIGEMPTYSET _GL_WARN_ON_USE (sigemptyset, "sigemptyset is unportable - " "use the gnulib module sigprocmask for portability"); # endif # undef sigfillset # if HAVE_RAW_DECL_SIGFILLSET _GL_WARN_ON_USE (sigfillset, "sigfillset is unportable - " "use the gnulib module sigprocmask for portability"); # endif # undef sigismember # if HAVE_RAW_DECL_SIGISMEMBER _GL_WARN_ON_USE (sigismember, "sigismember is unportable - " "use the gnulib module sigprocmask for portability"); # endif # undef sigpending # if HAVE_RAW_DECL_SIGPENDING _GL_WARN_ON_USE (sigpending, "sigpending is unportable - " "use the gnulib module sigprocmask for portability"); # endif # undef sigprocmask # if HAVE_RAW_DECL_SIGPROCMASK _GL_WARN_ON_USE (sigprocmask, "sigprocmask is unportable - " "use the gnulib module sigprocmask for portability"); # endif #endif /* @GNULIB_SIGPROCMASK@ */ #if @GNULIB_SIGACTION@ # if !@HAVE_SIGACTION@ # if !@HAVE_SIGINFO_T@ # if !GNULIB_defined_siginfo_types /* 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; # define GNULIB_defined_siginfo_types 1 # endif # endif /* !@HAVE_SIGINFO_T@ */ /* We assume that platforms which lack the sigaction() function also lack the 'struct sigaction' type, and vice versa. */ # if !GNULIB_defined_struct_sigaction 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 # define GNULIB_defined_struct_sigaction 1 # endif _GL_FUNCDECL_SYS (sigaction, int, (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@ */ _GL_CXXALIAS_SYS (sigaction, int, (int, const struct sigaction *restrict, struct sigaction *restrict)); _GL_CXXALIASWARN (sigaction); #elif defined GNULIB_POSIXCHECK # undef sigaction # if HAVE_RAW_DECL_SIGACTION _GL_WARN_ON_USE (sigaction, "sigaction is unportable - " "use the gnulib module sigaction for portability"); # endif #endif /* Some systems don't have SA_NODEFER. */ #ifndef SA_NODEFER # define SA_NODEFER 0 #endif #endif /* _@GUARD_PREFIX@_SIGNAL_H */ #endif /* _@GUARD_PREFIX@_SIGNAL_H */ #endif