version 1.1.1.2, 2012/05/29 09:29:43
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version 1.1.1.3, 2021/03/17 13:38:46
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/* POSIX compatible signal blocking. |
/* POSIX compatible signal blocking. |
Copyright (C) 2006-2011 Free Software Foundation, Inc. | Copyright (C) 2006-2019 Free Software Foundation, Inc. |
Written by Bruno Haible <bruno@clisp.org>, 2006. |
Written by Bruno Haible <bruno@clisp.org>, 2006. |
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This program is free software: you can redistribute it and/or modify |
This program is free software: you can redistribute it and/or modify |
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GNU General Public License for more details. |
GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
You should have received a copy of the GNU General Public License |
along with this program. If not, see <http://www.gnu.org/licenses/>. */ | along with this program. If not, see <https://www.gnu.org/licenses/>. */ |
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#include <config.h> |
#include <config.h> |
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#include <stdint.h> |
#include <stdint.h> |
#include <stdlib.h> |
#include <stdlib.h> |
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#if HAVE_MSVC_INVALID_PARAMETER_HANDLER |
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# include "msvc-inval.h" |
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#endif |
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/* We assume that a platform without POSIX signal blocking functions |
/* We assume that a platform without POSIX signal blocking functions |
also does not have the POSIX sigaction() function, only the |
also does not have the POSIX sigaction() function, only the |
signal() function. We also assume signal() has SysV semantics, |
signal() function. We also assume signal() has SysV semantics, |
where any handler is uninstalled prior to being invoked. This is |
where any handler is uninstalled prior to being invoked. This is |
true for Woe32 platforms. */ | true for native Windows platforms. */ |
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/* We use raw signal(), but also provide a wrapper rpl_signal() so |
/* We use raw signal(), but also provide a wrapper rpl_signal() so |
that applications can query or change a blocked signal. */ |
that applications can query or change a blocked signal. */ |
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/* On native Windows, as of 2008, the signal SIGABRT_COMPAT is an alias |
/* On native Windows, as of 2008, the signal SIGABRT_COMPAT is an alias |
for the signal SIGABRT. Only one signal handler is stored for both |
for the signal SIGABRT. Only one signal handler is stored for both |
SIGABRT and SIGABRT_COMPAT. SIGABRT_COMPAT is not a signal of its own. */ |
SIGABRT and SIGABRT_COMPAT. SIGABRT_COMPAT is not a signal of its own. */ |
#if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ | #if defined _WIN32 && ! defined __CYGWIN__ |
# undef SIGABRT_COMPAT |
# undef SIGABRT_COMPAT |
# define SIGABRT_COMPAT 6 |
# define SIGABRT_COMPAT 6 |
#endif |
#endif |
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typedef void (*handler_t) (int); |
typedef void (*handler_t) (int); |
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#if HAVE_MSVC_INVALID_PARAMETER_HANDLER |
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static handler_t |
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signal_nothrow (int sig, handler_t handler) |
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{ |
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handler_t result; |
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TRY_MSVC_INVAL |
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{ |
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result = signal (sig, handler); |
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} |
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CATCH_MSVC_INVAL |
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{ |
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result = SIG_ERR; |
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errno = EINVAL; |
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} |
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DONE_MSVC_INVAL; |
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return result; |
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} |
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# define signal signal_nothrow |
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#endif |
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/* Handling of gnulib defined signals. */ |
/* Handling of gnulib defined signals. */ |
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#if GNULIB_defined_SIGPIPE |
#if GNULIB_defined_SIGPIPE |
Line 80 ext_signal (int sig, handler_t handler)
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Line 106 ext_signal (int sig, handler_t handler)
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return signal (sig, handler); |
return signal (sig, handler); |
} |
} |
} |
} |
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# undef signal |
# define signal ext_signal |
# define signal ext_signal |
#endif |
#endif |
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Line 303 rpl_signal (int sig, handler_t handler)
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Line 330 rpl_signal (int sig, handler_t handler)
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} |
} |
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#if GNULIB_defined_SIGPIPE |
#if GNULIB_defined_SIGPIPE |
/* Raise the signal SIG. */ | /* Raise the signal SIGPIPE. */ |
int |
int |
rpl_raise (int sig) | _gl_raise_SIGPIPE (void) |
# undef raise | |
{ |
{ |
switch (sig) | if (blocked_set & (1U << SIGPIPE)) |
| pending_array[SIGPIPE] = 1; |
| else |
{ |
{ |
case SIGPIPE: | handler_t handler = SIGPIPE_handler; |
if (blocked_set & (1U << sig)) | if (handler == SIG_DFL) |
pending_array[sig] = 1; | exit (128 + SIGPIPE); |
else | else if (handler != SIG_IGN) |
{ | (*handler) (SIGPIPE); |
handler_t handler = SIGPIPE_handler; | |
if (handler == SIG_DFL) | |
exit (128 + SIGPIPE); | |
else if (handler != SIG_IGN) | |
(*handler) (sig); | |
} | |
return 0; | |
default: /* System defined signal */ | |
return raise (sig); | |
} |
} |
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return 0; |
} |
} |
#endif |
#endif |