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annotate lib/signal.in.h @ 13761:a19ace3ba849

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Avoid line length limitation from HP NonStop system header files. * m4/include_next.m4 (gl_INCLUDE_NEXT): Define also PRAGMA_COLUMNS. * lib/arpa_inet.in.h: Use PRAGMA_COLUMNS. * lib/ctype.in.h: Likewise. * lib/dirent.in.h: Likewise. * lib/errno.in.h: Likewise. * lib/fcntl.in.h: Likewise. * lib/float.in.h: Likewise. * lib/getopt.in.h: Likewise. * lib/iconv.in.h: Likewise. * lib/inttypes.in.h: Likewise. * lib/langinfo.in.h: Likewise. * lib/locale.in.h: Likewise. * lib/math.in.h: Likewise. * lib/netdb.in.h: Likewise. * lib/netinet_in.in.h: Likewise. * lib/poll.in.h: Likewise. * lib/pthread.in.h: Likewise. * lib/pty.in.h: Likewise. * lib/sched.in.h: Likewise. * lib/se-selinux.in.h: Likewise. * lib/search.in.h: Likewise. * lib/signal.in.h: Likewise. * lib/spawn.in.h: Likewise. * lib/stdarg.in.h: Likewise. * lib/stddef.in.h: Likewise. * lib/stdint.in.h: Likewise. * lib/stdio.in.h: Likewise. * lib/stdlib.in.h: Likewise. * lib/string.in.h: Likewise. * lib/strings.in.h: Likewise. * lib/sys_file.in.h: Likewise. * lib/sys_ioctl.in.h: Likewise. * lib/sys_select.in.h: Likewise. * lib/sys_socket.in.h: Likewise. * lib/sys_stat.in.h: Likewise. * lib/sys_time.in.h: Likewise. * lib/sys_times.in.h: Likewise. * lib/sys_utsname.in.h: Likewise. * lib/sys_wait.in.h: Likewise. * lib/sysexits.in.h: Likewise. * lib/termios.in.h: Likewise. * lib/time.in.h: Likewise. * lib/unistd.in.h: Likewise. * lib/wchar.in.h: Likewise. * lib/wctype.in.h: Likewise. * modules/arpa_inet (Makefile.am): Substitute PRAGMA_COLUMNS. * modules/ctype (Makefile.am): Likewise. * modules/dirent (Makefile.am): Likewise. * modules/errno (Makefile.am): Likewise. * modules/fcntl-h (Makefile.am): Likewise. * modules/float (Makefile.am): Likewise. * modules/getopt-posix (Makefile.am): Likewise. * modules/iconv-h (Makefile.am): Likewise. * modules/inttypes (Makefile.am): Likewise. * modules/langinfo (Makefile.am): Likewise. * modules/locale (Makefile.am): Likewise. * modules/math (Makefile.am): Likewise. * modules/netdb (Makefile.am): Likewise. * modules/netinet_in (Makefile.am): Likewise. * modules/poll-h (Makefile.am): Likewise. * modules/pthread (Makefile.am): Likewise. * modules/pty (Makefile.am): Likewise. * modules/sched (Makefile.am): Likewise. * modules/search (Makefile.am): Likewise. * modules/selinux-h (Makefile.am): Likewise. * modules/signal (Makefile.am): Likewise. * modules/spawn (Makefile.am): Likewise. * modules/stdarg (Makefile.am): Likewise. * modules/stddef (Makefile.am): Likewise. * modules/stdint (Makefile.am): Likewise. * modules/stdio (Makefile.am): Likewise. * modules/stdlib (Makefile.am): Likewise. * modules/string (Makefile.am): Likewise. * modules/strings (Makefile.am): Likewise. * modules/sys_file (Makefile.am): Likewise. * modules/sys_ioctl (Makefile.am): Likewise. * modules/sys_select (Makefile.am): Likewise. * modules/sys_socket (Makefile.am): Likewise. * modules/sys_stat (Makefile.am): Likewise. * modules/sys_time (Makefile.am): Likewise. * modules/sys_times (Makefile.am): Likewise. * modules/sys_utsname (Makefile.am): Likewise. * modules/sys_wait (Makefile.am): Likewise. * modules/sysexits (Makefile.am): Likewise. * modules/termios (Makefile.am): Likewise. * modules/time (Makefile.am): Likewise. * modules/unistd (Makefile.am): Likewise. * modules/wchar (Makefile.am): Likewise. * modules/wctype (Makefile.am): Likewise.
author Bruno Haible <bruno@clisp.org>
date Mon, 04 Oct 2010 23:35:51 +0200
parents 63c614c3b5e9
children f4b0b520e409
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1 /* A GNU-like <signal.h>.
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2
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3 Copyright (C) 2006-2010 Free Software Foundation, Inc.
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4
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5 This program is free software: you can redistribute it and/or modify
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6 it under the terms of the GNU General Public License as published by
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7 the Free Software Foundation; either version 3 of the License, or
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8 (at your option) any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU General Public License for more details.
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14
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15 You should have received a copy of the GNU General Public License
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16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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18 #if __GNUC__ >= 3
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19 @PRAGMA_SYSTEM_HEADER@
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20 #endif
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21 @PRAGMA_COLUMNS@
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23 #if defined __need_sig_atomic_t || defined __need_sigset_t
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24 /* Special invocation convention inside glibc header files. */
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25
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26 # @INCLUDE_NEXT@ @NEXT_SIGNAL_H@
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27
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28 #else
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29 /* Normal invocation convention. */
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30
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31 #ifndef _GL_SIGNAL_H
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32
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33 /* The include_next requires a split double-inclusion guard. */
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34 #@INCLUDE_NEXT@ @NEXT_SIGNAL_H@
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35
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36 #ifndef _GL_SIGNAL_H
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37 #define _GL_SIGNAL_H
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38
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39 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
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40
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41 /* The definition of _GL_ARG_NONNULL is copied here. */
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42
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43 /* The definition of _GL_WARN_ON_USE is copied here. */
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44
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45 /* Define pid_t, uid_t.
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46 Also, mingw defines sigset_t not in <signal.h>, but in <sys/types.h>. */
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47 #include <sys/types.h>
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48
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49 /* On AIX, sig_atomic_t already includes volatile. C99 requires that
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50 'volatile sig_atomic_t' ignore the extra modifier, but C89 did not.
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51 Hence, redefine this to a non-volatile type as needed. */
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52 #if ! @HAVE_TYPE_VOLATILE_SIG_ATOMIC_T@
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53 typedef int rpl_sig_atomic_t;
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54 # undef sig_atomic_t
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55 # define sig_atomic_t rpl_sig_atomic_t
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56 #endif
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57
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58 /* A set or mask of signals. */
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59 #if !@HAVE_SIGSET_T@
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60 typedef unsigned int sigset_t;
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61 #endif
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64 #if @GNULIB_SIGNAL_H_SIGPIPE@
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65 # ifndef SIGPIPE
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66 /* Define SIGPIPE to a value that does not overlap with other signals. */
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67 # define SIGPIPE 13
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68 # define GNULIB_defined_SIGPIPE 1
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69 /* To actually use SIGPIPE, you also need the gnulib modules 'sigprocmask',
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70 'write', 'stdio'. */
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71 # endif
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72 #endif
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73
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74
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75 #if @GNULIB_SIGPROCMASK@
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76 # if !@HAVE_POSIX_SIGNALBLOCKING@
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77
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78 /* Maximum signal number + 1. */
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79 # ifndef NSIG
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80 # define NSIG 32
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81 # endif
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82
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83 /* This code supports only 32 signals. */
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84 typedef int verify_NSIG_constraint[2 * (NSIG <= 32) - 1];
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85
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86 # endif
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87
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88 /* Test whether a given signal is contained in a signal set. */
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89 # if @HAVE_POSIX_SIGNALBLOCKING@
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90 /* This function is defined as a macro on MacOS X. */
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91 # if defined __cplusplus && defined GNULIB_NAMESPACE
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92 # undef sigismember
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93 # endif
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94 # else
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95 _GL_FUNCDECL_SYS (sigismember, int, (const sigset_t *set, int sig)
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96 _GL_ARG_NONNULL ((1)));
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97 # endif
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98 _GL_CXXALIAS_SYS (sigismember, int, (const sigset_t *set, int sig));
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99 _GL_CXXALIASWARN (sigismember);
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100
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101 /* Initialize a signal set to the empty set. */
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102 # if @HAVE_POSIX_SIGNALBLOCKING@
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103 /* This function is defined as a macro on MacOS X. */
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104 # if defined __cplusplus && defined GNULIB_NAMESPACE
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105 # undef sigemptyset
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106 # endif
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107 # else
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108 _GL_FUNCDECL_SYS (sigemptyset, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
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109 # endif
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110 _GL_CXXALIAS_SYS (sigemptyset, int, (sigset_t *set));
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111 _GL_CXXALIASWARN (sigemptyset);
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112
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113 /* Add a signal to a signal set. */
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114 # if @HAVE_POSIX_SIGNALBLOCKING@
63c614c3b5e9 signal: Undefine macro definitions in C++ mode.
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115 /* This function is defined as a macro on MacOS X. */
63c614c3b5e9 signal: Undefine macro definitions in C++ mode.
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116 # if defined __cplusplus && defined GNULIB_NAMESPACE
63c614c3b5e9 signal: Undefine macro definitions in C++ mode.
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diff changeset
117 # undef sigaddset
63c614c3b5e9 signal: Undefine macro definitions in C++ mode.
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diff changeset
118 # endif
63c614c3b5e9 signal: Undefine macro definitions in C++ mode.
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119 # else
12938
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120 _GL_FUNCDECL_SYS (sigaddset, int, (sigset_t *set, int sig)
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121 _GL_ARG_NONNULL ((1)));
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122 # endif
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123 _GL_CXXALIAS_SYS (sigaddset, int, (sigset_t *set, int sig));
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124 _GL_CXXALIASWARN (sigaddset);
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cda94d6d670f Rename signal_.h to signal.in.h.
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125
cda94d6d670f Rename signal_.h to signal.in.h.
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126 /* Remove a signal from a signal set. */
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127 # if @HAVE_POSIX_SIGNALBLOCKING@
63c614c3b5e9 signal: Undefine macro definitions in C++ mode.
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128 /* This function is defined as a macro on MacOS X. */
63c614c3b5e9 signal: Undefine macro definitions in C++ mode.
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129 # if defined __cplusplus && defined GNULIB_NAMESPACE
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130 # undef sigdelset
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diff changeset
131 # endif
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diff changeset
132 # else
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133 _GL_FUNCDECL_SYS (sigdelset, int, (sigset_t *set, int sig)
baf17c6b8bd7 signal: Avoid #define replacements in C++ mode.
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134 _GL_ARG_NONNULL ((1)));
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135 # endif
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136 _GL_CXXALIAS_SYS (sigdelset, int, (sigset_t *set, int sig));
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137 _GL_CXXALIASWARN (sigdelset);
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138
cda94d6d670f Rename signal_.h to signal.in.h.
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139 /* Fill a signal set with all possible signals. */
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140 # if @HAVE_POSIX_SIGNALBLOCKING@
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141 /* This function is defined as a macro on MacOS X. */
63c614c3b5e9 signal: Undefine macro definitions in C++ mode.
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142 # if defined __cplusplus && defined GNULIB_NAMESPACE
63c614c3b5e9 signal: Undefine macro definitions in C++ mode.
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143 # undef sigfillset
63c614c3b5e9 signal: Undefine macro definitions in C++ mode.
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144 # endif
63c614c3b5e9 signal: Undefine macro definitions in C++ mode.
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diff changeset
145 # else
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146 _GL_FUNCDECL_SYS (sigfillset, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
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147 # endif
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148 _GL_CXXALIAS_SYS (sigfillset, int, (sigset_t *set));
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149 _GL_CXXALIASWARN (sigfillset);
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150
cda94d6d670f Rename signal_.h to signal.in.h.
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151 /* Return the set of those blocked signals that are pending. */
12938
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152 # if !@HAVE_POSIX_SIGNALBLOCKING@
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153 _GL_FUNCDECL_SYS (sigpending, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
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diff changeset
154 # endif
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diff changeset
155 _GL_CXXALIAS_SYS (sigpending, int, (sigset_t *set));
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156 _GL_CXXALIASWARN (sigpending);
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157
cda94d6d670f Rename signal_.h to signal.in.h.
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diff changeset
158 /* If OLD_SET is not NULL, put the current set of blocked signals in *OLD_SET.
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159 Then, if SET is not NULL, affect the current set of blocked signals by
cda94d6d670f Rename signal_.h to signal.in.h.
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diff changeset
160 combining it with *SET as indicated in OPERATION.
cda94d6d670f Rename signal_.h to signal.in.h.
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161 In this implementation, you are not allowed to change a signal handler
cda94d6d670f Rename signal_.h to signal.in.h.
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162 while the signal is blocked. */
12938
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diff changeset
163 # if !@HAVE_POSIX_SIGNALBLOCKING@
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164 # define SIG_BLOCK 0 /* blocked_set = blocked_set | *set; */
8c827f8e5f04 signal, spawn: use link warnings
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165 # define SIG_SETMASK 1 /* blocked_set = *set; */
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diff changeset
166 # define SIG_UNBLOCK 2 /* blocked_set = blocked_set & ~*set; */
12938
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diff changeset
167 _GL_FUNCDECL_SYS (sigprocmask, int,
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168 (int operation, const sigset_t *set, sigset_t *old_set));
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diff changeset
169 # endif
baf17c6b8bd7 signal: Avoid #define replacements in C++ mode.
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diff changeset
170 _GL_CXXALIAS_SYS (sigprocmask, int,
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diff changeset
171 (int operation, const sigset_t *set, sigset_t *old_set));
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172 _GL_CXXALIASWARN (sigprocmask);
9259
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173
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9b123d1aa781 Improve robustness of sigprocmask by overriding signal.
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diff changeset
174 /* Install the handler FUNC for signal SIG, and return the previous
9b123d1aa781 Improve robustness of sigprocmask by overriding signal.
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diff changeset
175 handler. */
12938
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diff changeset
176 # ifdef __cplusplus
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diff changeset
177 extern "C" {
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178 # endif
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179 typedef void (*_gl_function_taking_int_returning_void_t) (int);
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180 # ifdef __cplusplus
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181 }
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182 # endif
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183 # if !@HAVE_POSIX_SIGNALBLOCKING@
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184 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
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185 # define signal rpl_signal
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186 # endif
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187 _GL_FUNCDECL_RPL (signal, _gl_function_taking_int_returning_void_t,
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188 (int sig, _gl_function_taking_int_returning_void_t func));
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189 _GL_CXXALIAS_RPL (signal, _gl_function_taking_int_returning_void_t,
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diff changeset
190 (int sig, _gl_function_taking_int_returning_void_t func));
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diff changeset
191 # else
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192 _GL_CXXALIAS_SYS (signal, _gl_function_taking_int_returning_void_t,
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193 (int sig, _gl_function_taking_int_returning_void_t func));
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diff changeset
194 # endif
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195 _GL_CXXALIASWARN (signal);
10483
5a24031ebf7d Support signal handling with SIGPIPE on native Windows platforms.
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196
5a24031ebf7d Support signal handling with SIGPIPE on native Windows platforms.
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diff changeset
197 /* Raise signal SIG. */
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198 # if !@HAVE_POSIX_SIGNALBLOCKING@ && GNULIB_defined_SIGPIPE
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199 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
12535
8c827f8e5f04 signal, spawn: use link warnings
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200 # undef raise
8c827f8e5f04 signal, spawn: use link warnings
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201 # define raise rpl_raise
12938
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diff changeset
202 # endif
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diff changeset
203 _GL_FUNCDECL_RPL (raise, int, (int sig));
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204 _GL_CXXALIAS_RPL (raise, int, (int sig));
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diff changeset
205 # else
baf17c6b8bd7 signal: Avoid #define replacements in C++ mode.
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diff changeset
206 _GL_CXXALIAS_SYS (raise, int, (int sig));
baf17c6b8bd7 signal: Avoid #define replacements in C++ mode.
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diff changeset
207 # endif
baf17c6b8bd7 signal: Avoid #define replacements in C++ mode.
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diff changeset
208 _GL_CXXALIASWARN (raise);
10483
5a24031ebf7d Support signal handling with SIGPIPE on native Windows platforms.
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diff changeset
209
12535
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diff changeset
210 #elif defined GNULIB_POSIXCHECK
8c827f8e5f04 signal, spawn: use link warnings
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diff changeset
211 # undef sigaddset
12766
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diff changeset
212 # if HAVE_RAW_DECL_SIGADDSET
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diff changeset
213 _GL_WARN_ON_USE (sigaddset, "sigaddset is unportable - "
2c14f1e449e5 warn-on-use: use instead of link-warning
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diff changeset
214 "use the gnulib module sigprocmask for portability");
2c14f1e449e5 warn-on-use: use instead of link-warning
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diff changeset
215 # endif
12535
8c827f8e5f04 signal, spawn: use link warnings
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diff changeset
216 # undef sigdelset
12766
2c14f1e449e5 warn-on-use: use instead of link-warning
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diff changeset
217 # if HAVE_RAW_DECL_SIGDELSET
2c14f1e449e5 warn-on-use: use instead of link-warning
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diff changeset
218 _GL_WARN_ON_USE (sigdelset, "sigdelset is unportable - "
2c14f1e449e5 warn-on-use: use instead of link-warning
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diff changeset
219 "use the gnulib module sigprocmask for portability");
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diff changeset
220 # endif
12535
8c827f8e5f04 signal, spawn: use link warnings
Eric Blake <ebb9@byu.net>
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diff changeset
221 # undef sigemptyset
12766
2c14f1e449e5 warn-on-use: use instead of link-warning
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diff changeset
222 # if HAVE_RAW_DECL_SIGEMPTYSET
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diff changeset
223 _GL_WARN_ON_USE (sigemptyset, "sigemptyset is unportable - "
2c14f1e449e5 warn-on-use: use instead of link-warning
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diff changeset
224 "use the gnulib module sigprocmask for portability");
2c14f1e449e5 warn-on-use: use instead of link-warning
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diff changeset
225 # endif
12535
8c827f8e5f04 signal, spawn: use link warnings
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diff changeset
226 # undef sigfillset
12766
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diff changeset
227 # if HAVE_RAW_DECL_SIGFILLSET
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diff changeset
228 _GL_WARN_ON_USE (sigfillset, "sigfillset is unportable - "
2c14f1e449e5 warn-on-use: use instead of link-warning
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diff changeset
229 "use the gnulib module sigprocmask for portability");
2c14f1e449e5 warn-on-use: use instead of link-warning
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diff changeset
230 # endif
12535
8c827f8e5f04 signal, spawn: use link warnings
Eric Blake <ebb9@byu.net>
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diff changeset
231 # undef sigismember
12766
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diff changeset
232 # if HAVE_RAW_DECL_SIGISMEMBER
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diff changeset
233 _GL_WARN_ON_USE (sigismember, "sigismember is unportable - "
2c14f1e449e5 warn-on-use: use instead of link-warning
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diff changeset
234 "use the gnulib module sigprocmask for portability");
2c14f1e449e5 warn-on-use: use instead of link-warning
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diff changeset
235 # endif
12535
8c827f8e5f04 signal, spawn: use link warnings
Eric Blake <ebb9@byu.net>
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diff changeset
236 # undef sigpending
12766
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diff changeset
237 # if HAVE_RAW_DECL_SIGPENDING
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diff changeset
238 _GL_WARN_ON_USE (sigpending, "sigpending is unportable - "
2c14f1e449e5 warn-on-use: use instead of link-warning
Eric Blake <ebb9@byu.net>
parents: 12559
diff changeset
239 "use the gnulib module sigprocmask for portability");
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diff changeset
240 # endif
12535
8c827f8e5f04 signal, spawn: use link warnings
Eric Blake <ebb9@byu.net>
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diff changeset
241 # undef sigprocmask
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242 # if HAVE_RAW_DECL_SIGPROCMASK
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243 _GL_WARN_ON_USE (sigprocmask, "sigprocmask is unportable - "
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244 "use the gnulib module sigprocmask for portability");
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245 # endif
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246 #endif /* @GNULIB_SIGPROCMASK@ */
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247
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248
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249 #if @GNULIB_SIGACTION@
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250 # if !@HAVE_SIGACTION@
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251
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252 # if !@HAVE_SIGINFO_T@
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253 /* Present to allow compilation, but unsupported by gnulib. */
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254 union sigval
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255 {
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256 int sival_int;
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257 void *sival_ptr;
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258 };
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259
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260 /* Present to allow compilation, but unsupported by gnulib. */
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261 struct siginfo_t
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262 {
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263 int si_signo;
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264 int si_code;
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265 int si_errno;
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266 pid_t si_pid;
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267 uid_t si_uid;
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268 void *si_addr;
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269 int si_status;
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270 long si_band;
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271 union sigval si_value;
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272 };
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273 typedef struct siginfo_t siginfo_t;
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274 # endif /* !@HAVE_SIGINFO_T@ */
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275
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276 /* We assume that platforms which lack the sigaction() function also lack
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277 the 'struct sigaction' type, and vice versa. */
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278
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279 struct sigaction
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280 {
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281 union
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282 {
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283 void (*_sa_handler) (int);
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284 /* Present to allow compilation, but unsupported by gnulib. POSIX
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285 says that implementations may, but not must, make sa_sigaction
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286 overlap with sa_handler, but we know of no implementation where
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287 they do not overlap. */
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288 void (*_sa_sigaction) (int, siginfo_t *, void *);
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289 } _sa_func;
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290 sigset_t sa_mask;
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291 /* Not all POSIX flags are supported. */
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292 int sa_flags;
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293 };
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294 # define sa_handler _sa_func._sa_handler
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295 # define sa_sigaction _sa_func._sa_sigaction
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296 /* Unsupported flags are not present. */
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297 # define SA_RESETHAND 1
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298 # define SA_NODEFER 2
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299 # define SA_RESTART 4
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300
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301 _GL_FUNCDECL_SYS (sigaction, int, (int, const struct sigaction *restrict,
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302 struct sigaction *restrict));
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303
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304 # elif !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@
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305
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306 # define sa_sigaction sa_handler
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307
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308 # endif /* !@HAVE_SIGACTION@, !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@ */
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309
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310 _GL_CXXALIAS_SYS (sigaction, int, (int, const struct sigaction *restrict,
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311 struct sigaction *restrict));
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312 _GL_CXXALIASWARN (sigaction);
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313
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314 #elif defined GNULIB_POSIXCHECK
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315 # undef sigaction
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316 # if HAVE_RAW_DECL_SIGACTION
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317 _GL_WARN_ON_USE (sigaction, "sigaction is unportable - "
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318 "use the gnulib module sigaction for portability");
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319 # endif
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320 #endif
9259
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321
10706
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322 /* Some systems don't have SA_NODEFER. */
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323 #ifndef SA_NODEFER
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324 # define SA_NODEFER 0
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325 #endif
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326
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327
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328 #endif /* _GL_SIGNAL_H */
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329 #endif /* _GL_SIGNAL_H */
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330 #endif