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annotate lib/signal.in.h @ 14379:2330aac2ae54

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maint: adjust cpp indentation to reflect nesting depth I.e., in a block of code that begins with an unnested "#if", put one space between the "#" in column 1 and following token. For example, -#include <sys/vfs.h> +# include <sys/vfs.h> Do this only in .c files that are part of a module I maintain. * lib/linkat.c: Filter through cppi. * lib/nanosleep.c: Likewise. * lib/openat.c: Likewise. * lib/openat-die.c: Likewise. * lib/dup3.c: Likewise. * lib/fchownat.c: Likewise. * lib/flock.c: Likewise. * lib/fsync.c: Likewise. * lib/fts.c: Likewise. * lib/getpass.c: Likewise. * lib/gettimeofday.c: Likewise. * lib/userspec.c: Likewise. * Makefile (sc_cpp_indent_check): New rule, to check this.
author Jim Meyering <meyering@redhat.com>
date Sun, 20 Feb 2011 23:02:43 +0100
parents da5595160b9f
children e753ffb0501f
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1 /* A GNU-like <signal.h>.
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2
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3 Copyright (C) 2006-2011 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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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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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 # if !GNULIB_defined_sig_atomic_t
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54 typedef int rpl_sig_atomic_t;
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55 # undef sig_atomic_t
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56 # define sig_atomic_t rpl_sig_atomic_t
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57 # define GNULIB_defined_sig_atomic_t 1
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58 # endif
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59 #endif
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60
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61 /* A set or mask of signals. */
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62 #if !@HAVE_SIGSET_T@
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63 # if !GNULIB_defined_sigset_t
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64 typedef unsigned int sigset_t;
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65 # define GNULIB_defined_sigset_t 1
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66 # endif
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67 #endif
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70 #if @GNULIB_SIGNAL_H_SIGPIPE@
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71 # ifndef SIGPIPE
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72 /* Define SIGPIPE to a value that does not overlap with other signals. */
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73 # define SIGPIPE 13
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74 # define GNULIB_defined_SIGPIPE 1
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75 /* To actually use SIGPIPE, you also need the gnulib modules 'sigprocmask',
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76 'write', 'stdio'. */
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77 # endif
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78 #endif
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79
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81 /* Maximum signal number + 1. */
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82 #ifndef NSIG
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83 # if defined __TANDEM
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84 # define NSIG 32
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85 # endif
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86 #endif
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87
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88
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89 #if @GNULIB_SIGPROCMASK@
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90 # if !@HAVE_POSIX_SIGNALBLOCKING@
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91
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92 /* Maximum signal number + 1. */
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93 # ifndef NSIG
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94 # define NSIG 32
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95 # endif
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96
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97 /* This code supports only 32 signals. */
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98 # if !GNULIB_defined_verify_NSIG_constraint
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99 typedef int verify_NSIG_constraint[NSIG <= 32 ? 1 : -1];
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100 # define GNULIB_defined_verify_NSIG_constraint 1
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101 # endif
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102
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103 # endif
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104
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105 /* Test whether a given signal is contained in a signal set. */
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106 # if @HAVE_POSIX_SIGNALBLOCKING@
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107 /* This function is defined as a macro on MacOS X. */
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108 # if defined __cplusplus && defined GNULIB_NAMESPACE
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109 # undef sigismember
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110 # endif
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111 # else
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112 _GL_FUNCDECL_SYS (sigismember, int, (const sigset_t *set, int sig)
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113 _GL_ARG_NONNULL ((1)));
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114 # endif
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115 _GL_CXXALIAS_SYS (sigismember, int, (const sigset_t *set, int sig));
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116 _GL_CXXALIASWARN (sigismember);
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117
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118 /* Initialize a signal set to the empty set. */
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119 # if @HAVE_POSIX_SIGNALBLOCKING@
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120 /* This function is defined as a macro on MacOS X. */
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121 # if defined __cplusplus && defined GNULIB_NAMESPACE
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122 # undef sigemptyset
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123 # endif
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124 # else
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125 _GL_FUNCDECL_SYS (sigemptyset, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
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126 # endif
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127 _GL_CXXALIAS_SYS (sigemptyset, int, (sigset_t *set));
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128 _GL_CXXALIASWARN (sigemptyset);
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129
cda94d6d670f Rename signal_.h to signal.in.h.
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130 /* Add a signal to a signal set. */
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131 # if @HAVE_POSIX_SIGNALBLOCKING@
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132 /* This function is defined as a macro on MacOS X. */
63c614c3b5e9 signal: Undefine macro definitions in C++ mode.
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133 # if defined __cplusplus && defined GNULIB_NAMESPACE
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134 # undef sigaddset
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diff changeset
135 # endif
63c614c3b5e9 signal: Undefine macro definitions in C++ mode.
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diff changeset
136 # else
12938
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137 _GL_FUNCDECL_SYS (sigaddset, int, (sigset_t *set, int sig)
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138 _GL_ARG_NONNULL ((1)));
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139 # endif
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140 _GL_CXXALIAS_SYS (sigaddset, int, (sigset_t *set, int sig));
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141 _GL_CXXALIASWARN (sigaddset);
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142
cda94d6d670f Rename signal_.h to signal.in.h.
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143 /* Remove a signal from a signal set. */
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144 # if @HAVE_POSIX_SIGNALBLOCKING@
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145 /* This function is defined as a macro on MacOS X. */
63c614c3b5e9 signal: Undefine macro definitions in C++ mode.
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146 # if defined __cplusplus && defined GNULIB_NAMESPACE
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147 # undef sigdelset
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148 # endif
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diff changeset
149 # else
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150 _GL_FUNCDECL_SYS (sigdelset, int, (sigset_t *set, int sig)
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151 _GL_ARG_NONNULL ((1)));
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diff changeset
152 # endif
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153 _GL_CXXALIAS_SYS (sigdelset, int, (sigset_t *set, int sig));
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154 _GL_CXXALIASWARN (sigdelset);
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155
cda94d6d670f Rename signal_.h to signal.in.h.
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156 /* Fill a signal set with all possible signals. */
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157 # if @HAVE_POSIX_SIGNALBLOCKING@
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158 /* This function is defined as a macro on MacOS X. */
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159 # if defined __cplusplus && defined GNULIB_NAMESPACE
63c614c3b5e9 signal: Undefine macro definitions in C++ mode.
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160 # undef sigfillset
63c614c3b5e9 signal: Undefine macro definitions in C++ mode.
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161 # endif
63c614c3b5e9 signal: Undefine macro definitions in C++ mode.
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diff changeset
162 # else
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163 _GL_FUNCDECL_SYS (sigfillset, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
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164 # endif
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165 _GL_CXXALIAS_SYS (sigfillset, int, (sigset_t *set));
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166 _GL_CXXALIASWARN (sigfillset);
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167
cda94d6d670f Rename signal_.h to signal.in.h.
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168 /* Return the set of those blocked signals that are pending. */
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169 # if !@HAVE_POSIX_SIGNALBLOCKING@
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170 _GL_FUNCDECL_SYS (sigpending, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
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diff changeset
171 # endif
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diff changeset
172 _GL_CXXALIAS_SYS (sigpending, int, (sigset_t *set));
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173 _GL_CXXALIASWARN (sigpending);
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174
cda94d6d670f Rename signal_.h to signal.in.h.
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diff changeset
175 /* If OLD_SET is not NULL, put the current set of blocked signals in *OLD_SET.
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176 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
177 combining it with *SET as indicated in OPERATION.
cda94d6d670f Rename signal_.h to signal.in.h.
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178 In this implementation, you are not allowed to change a signal handler
cda94d6d670f Rename signal_.h to signal.in.h.
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179 while the signal is blocked. */
12938
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diff changeset
180 # if !@HAVE_POSIX_SIGNALBLOCKING@
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181 # define SIG_BLOCK 0 /* blocked_set = blocked_set | *set; */
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182 # define SIG_SETMASK 1 /* blocked_set = *set; */
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diff changeset
183 # define SIG_UNBLOCK 2 /* blocked_set = blocked_set & ~*set; */
12938
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184 _GL_FUNCDECL_SYS (sigprocmask, int,
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185 (int operation, const sigset_t *set, sigset_t *old_set));
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186 # endif
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187 _GL_CXXALIAS_SYS (sigprocmask, int,
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188 (int operation, const sigset_t *set, sigset_t *old_set));
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189 _GL_CXXALIASWARN (sigprocmask);
9259
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190
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diff changeset
191 /* 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
192 handler. */
12938
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diff changeset
193 # ifdef __cplusplus
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194 extern "C" {
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195 # endif
14274
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196 # if !GNULIB_defined_function_taking_int_returning_void_t
12938
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197 typedef void (*_gl_function_taking_int_returning_void_t) (int);
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198 # define GNULIB_defined_function_taking_int_returning_void_t 1
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diff changeset
199 # endif
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diff changeset
200 # ifdef __cplusplus
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201 }
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diff changeset
202 # endif
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diff changeset
203 # if !@HAVE_POSIX_SIGNALBLOCKING@
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204 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
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205 # define signal rpl_signal
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diff changeset
206 # endif
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diff changeset
207 _GL_FUNCDECL_RPL (signal, _gl_function_taking_int_returning_void_t,
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diff changeset
208 (int sig, _gl_function_taking_int_returning_void_t func));
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diff changeset
209 _GL_CXXALIAS_RPL (signal, _gl_function_taking_int_returning_void_t,
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diff changeset
210 (int sig, _gl_function_taking_int_returning_void_t func));
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diff changeset
211 # else
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diff changeset
212 _GL_CXXALIAS_SYS (signal, _gl_function_taking_int_returning_void_t,
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diff changeset
213 (int sig, _gl_function_taking_int_returning_void_t func));
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diff changeset
214 # endif
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diff changeset
215 _GL_CXXALIASWARN (signal);
10483
5a24031ebf7d Support signal handling with SIGPIPE on native Windows platforms.
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diff changeset
216
5a24031ebf7d Support signal handling with SIGPIPE on native Windows platforms.
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diff changeset
217 /* Raise signal SIG. */
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diff changeset
218 # if !@HAVE_POSIX_SIGNALBLOCKING@ && GNULIB_defined_SIGPIPE
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diff changeset
219 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
12535
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diff changeset
220 # undef raise
8c827f8e5f04 signal, spawn: use link warnings
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diff changeset
221 # define raise rpl_raise
12938
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diff changeset
222 # endif
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diff changeset
223 _GL_FUNCDECL_RPL (raise, int, (int sig));
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diff changeset
224 _GL_CXXALIAS_RPL (raise, int, (int sig));
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diff changeset
225 # else
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diff changeset
226 _GL_CXXALIAS_SYS (raise, int, (int sig));
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diff changeset
227 # endif
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228 _GL_CXXALIASWARN (raise);
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5a24031ebf7d Support signal handling with SIGPIPE on native Windows platforms.
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diff changeset
229
12535
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diff changeset
230 #elif defined GNULIB_POSIXCHECK
8c827f8e5f04 signal, spawn: use link warnings
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diff changeset
231 # undef sigaddset
12766
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diff changeset
232 # if HAVE_RAW_DECL_SIGADDSET
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diff changeset
233 _GL_WARN_ON_USE (sigaddset, "sigaddset 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
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diff changeset
236 # undef sigdelset
12766
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diff changeset
237 # if HAVE_RAW_DECL_SIGDELSET
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diff changeset
238 _GL_WARN_ON_USE (sigdelset, "sigdelset is unportable - "
2c14f1e449e5 warn-on-use: use instead of link-warning
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parents: 12559
diff changeset
239 "use the gnulib module sigprocmask for portability");
2c14f1e449e5 warn-on-use: use instead of link-warning
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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 sigemptyset
12766
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diff changeset
242 # if HAVE_RAW_DECL_SIGEMPTYSET
2c14f1e449e5 warn-on-use: use instead of link-warning
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diff changeset
243 _GL_WARN_ON_USE (sigemptyset, "sigemptyset is unportable - "
2c14f1e449e5 warn-on-use: use instead of link-warning
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parents: 12559
diff changeset
244 "use the gnulib module sigprocmask for portability");
2c14f1e449e5 warn-on-use: use instead of link-warning
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diff changeset
245 # endif
12535
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diff changeset
246 # undef sigfillset
12766
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diff changeset
247 # if HAVE_RAW_DECL_SIGFILLSET
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diff changeset
248 _GL_WARN_ON_USE (sigfillset, "sigfillset is unportable - "
2c14f1e449e5 warn-on-use: use instead of link-warning
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parents: 12559
diff changeset
249 "use the gnulib module sigprocmask for portability");
2c14f1e449e5 warn-on-use: use instead of link-warning
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diff changeset
250 # endif
12535
8c827f8e5f04 signal, spawn: use link warnings
Eric Blake <ebb9@byu.net>
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diff changeset
251 # undef sigismember
12766
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diff changeset
252 # if HAVE_RAW_DECL_SIGISMEMBER
2c14f1e449e5 warn-on-use: use instead of link-warning
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diff changeset
253 _GL_WARN_ON_USE (sigismember, "sigismember is unportable - "
2c14f1e449e5 warn-on-use: use instead of link-warning
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parents: 12559
diff changeset
254 "use the gnulib module sigprocmask for portability");
2c14f1e449e5 warn-on-use: use instead of link-warning
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diff changeset
255 # endif
12535
8c827f8e5f04 signal, spawn: use link warnings
Eric Blake <ebb9@byu.net>
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diff changeset
256 # undef sigpending
12766
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diff changeset
257 # if HAVE_RAW_DECL_SIGPENDING
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258 _GL_WARN_ON_USE (sigpending, "sigpending is unportable - "
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259 "use the gnulib module sigprocmask for portability");
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260 # endif
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261 # undef sigprocmask
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262 # if HAVE_RAW_DECL_SIGPROCMASK
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263 _GL_WARN_ON_USE (sigprocmask, "sigprocmask is unportable - "
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264 "use the gnulib module sigprocmask for portability");
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265 # endif
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266 #endif /* @GNULIB_SIGPROCMASK@ */
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267
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268
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269 #if @GNULIB_SIGACTION@
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270 # if !@HAVE_SIGACTION@
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271
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272 # if !@HAVE_SIGINFO_T@
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273
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274 # if !GNULIB_defined_siginfo_types
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275
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276 /* Present to allow compilation, but unsupported by gnulib. */
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277 union sigval
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278 {
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279 int sival_int;
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280 void *sival_ptr;
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281 };
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282
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283 /* Present to allow compilation, but unsupported by gnulib. */
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284 struct siginfo_t
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285 {
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286 int si_signo;
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287 int si_code;
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288 int si_errno;
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289 pid_t si_pid;
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290 uid_t si_uid;
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291 void *si_addr;
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292 int si_status;
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293 long si_band;
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294 union sigval si_value;
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295 };
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296 typedef struct siginfo_t siginfo_t;
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297
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298 # define GNULIB_defined_siginfo_types 1
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299 # endif
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300
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301 # endif /* !@HAVE_SIGINFO_T@ */
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302
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303 /* We assume that platforms which lack the sigaction() function also lack
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304 the 'struct sigaction' type, and vice versa. */
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305
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306 # if !GNULIB_defined_struct_sigaction
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307
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308 struct sigaction
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309 {
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310 union
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311 {
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312 void (*_sa_handler) (int);
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313 /* Present to allow compilation, but unsupported by gnulib. POSIX
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314 says that implementations may, but not must, make sa_sigaction
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315 overlap with sa_handler, but we know of no implementation where
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316 they do not overlap. */
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317 void (*_sa_sigaction) (int, siginfo_t *, void *);
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318 } _sa_func;
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319 sigset_t sa_mask;
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320 /* Not all POSIX flags are supported. */
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321 int sa_flags;
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322 };
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323 # define sa_handler _sa_func._sa_handler
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324 # define sa_sigaction _sa_func._sa_sigaction
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325 /* Unsupported flags are not present. */
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326 # define SA_RESETHAND 1
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327 # define SA_NODEFER 2
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328 # define SA_RESTART 4
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329
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330 # define GNULIB_defined_struct_sigaction 1
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331 # endif
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332
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333 _GL_FUNCDECL_SYS (sigaction, int, (int, const struct sigaction *restrict,
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334 struct sigaction *restrict));
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335
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336 # elif !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@
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337
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338 # define sa_sigaction sa_handler
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339
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340 # endif /* !@HAVE_SIGACTION@, !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@ */
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341
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342 _GL_CXXALIAS_SYS (sigaction, int, (int, const struct sigaction *restrict,
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343 struct sigaction *restrict));
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344 _GL_CXXALIASWARN (sigaction);
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345
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346 #elif defined GNULIB_POSIXCHECK
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347 # undef sigaction
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348 # if HAVE_RAW_DECL_SIGACTION
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349 _GL_WARN_ON_USE (sigaction, "sigaction is unportable - "
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350 "use the gnulib module sigaction for portability");
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351 # endif
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352 #endif
9259
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353
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354 /* Some systems don't have SA_NODEFER. */
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355 #ifndef SA_NODEFER
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356 # define SA_NODEFER 0
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357 #endif
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358
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359
9259
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360 #endif /* _GL_SIGNAL_H */
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361 #endif /* _GL_SIGNAL_H */
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362 #endif