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annotate lib/signal.in.h @ 12559:c2cbabec01dd

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update nearly all FSF copyright year lists to include 2010 Use the same procedure as for 2009, outlined in http://thread.gmane.org/gmane.comp.lib.gnulib.bugs/20081
author Jim Meyering <meyering@redhat.com>
date Fri, 01 Jan 2010 10:31:12 +0100
parents 8c827f8e5f04
children 2c14f1e449e5
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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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17
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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
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22 #if defined __need_sig_atomic_t || defined __need_sigset_t
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23 /* Special invocation convention inside glibc header files. */
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24
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25 # @INCLUDE_NEXT@ @NEXT_SIGNAL_H@
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26
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27 #else
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28 /* Normal invocation convention. */
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29
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30 #ifndef _GL_SIGNAL_H
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31
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32 /* The include_next requires a split double-inclusion guard. */
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33 #@INCLUDE_NEXT@ @NEXT_SIGNAL_H@
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34
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35 #ifndef _GL_SIGNAL_H
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36 #define _GL_SIGNAL_H
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37
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38 /* The definition of GL_LINK_WARNING is copied here. */
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39
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40 /* The definition of _GL_ARG_NONNULL is copied here. */
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41
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42 /* Define pid_t, uid_t.
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43 Also, mingw defines sigset_t not in <signal.h>, but in <sys/types.h>. */
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44 #include <sys/types.h>
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45
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46 /* On AIX, sig_atomic_t already includes volatile. C99 requires that
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47 'volatile sig_atomic_t' ignore the extra modifier, but C89 did not.
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48 Hence, redefine this to a non-volatile type as needed. */
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49 #if ! @HAVE_TYPE_VOLATILE_SIG_ATOMIC_T@
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50 typedef int rpl_sig_atomic_t;
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51 # undef sig_atomic_t
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52 # define sig_atomic_t rpl_sig_atomic_t
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53 #endif
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54
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55 /* A set or mask of signals. */
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56 #if !@HAVE_SIGSET_T@
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57 typedef unsigned int sigset_t;
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58 #endif
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59
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60 #ifdef __cplusplus
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61 extern "C" {
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62 #endif
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63
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64
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65 #if @GNULIB_SIGNAL_H_SIGPIPE@
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66 # ifndef SIGPIPE
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67 /* Define SIGPIPE to a value that does not overlap with other signals. */
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68 # define SIGPIPE 13
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69 # define GNULIB_defined_SIGPIPE 1
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70 /* To actually use SIGPIPE, you also need the gnulib modules 'sigprocmask',
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71 'write', 'stdio'. */
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72 # endif
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73 #endif
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74
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75
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76 #if @GNULIB_SIGPROCMASK@
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77 # if !@HAVE_POSIX_SIGNALBLOCKING@
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78
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79 /* Maximum signal number + 1. */
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80 # ifndef NSIG
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81 # define NSIG 32
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82 # endif
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83
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84 /* This code supports only 32 signals. */
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85 typedef int verify_NSIG_constraint[2 * (NSIG <= 32) - 1];
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86
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87 /* Test whether a given signal is contained in a signal set. */
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88 extern int sigismember (const sigset_t *set, int sig) _GL_ARG_NONNULL ((1));
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89
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90 /* Initialize a signal set to the empty set. */
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91 extern int sigemptyset (sigset_t *set) _GL_ARG_NONNULL ((1));
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92
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93 /* Add a signal to a signal set. */
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94 extern int sigaddset (sigset_t *set, int sig) _GL_ARG_NONNULL ((1));
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95
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96 /* Remove a signal from a signal set. */
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97 extern int sigdelset (sigset_t *set, int sig) _GL_ARG_NONNULL ((1));
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98
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99 /* Fill a signal set with all possible signals. */
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100 extern int sigfillset (sigset_t *set) _GL_ARG_NONNULL ((1));
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101
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102 /* Return the set of those blocked signals that are pending. */
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103 extern int sigpending (sigset_t *set) _GL_ARG_NONNULL ((1));
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104
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105 /* If OLD_SET is not NULL, put the current set of blocked signals in *OLD_SET.
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106 Then, if SET is not NULL, affect the current set of blocked signals by
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107 combining it with *SET as indicated in OPERATION.
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108 In this implementation, you are not allowed to change a signal handler
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109 while the signal is blocked. */
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110 # define SIG_BLOCK 0 /* blocked_set = blocked_set | *set; */
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111 # define SIG_SETMASK 1 /* blocked_set = *set; */
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112 # define SIG_UNBLOCK 2 /* blocked_set = blocked_set & ~*set; */
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113 extern int sigprocmask (int operation, const sigset_t *set, sigset_t *old_set);
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114
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115 # define signal rpl_signal
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116 /* Install the handler FUNC for signal SIG, and return the previous
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117 handler. */
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118 extern void (*signal (int sig, void (*func) (int))) (int);
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119
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120 # if GNULIB_defined_SIGPIPE
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121
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122 /* Raise signal SIG. */
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123 # undef raise
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124 # define raise rpl_raise
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125 extern int raise (int sig);
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126
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127 # endif
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128
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129 # endif /* !@HAVE_POSIX_SIGNALBLOCKING@ */
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130 #elif defined GNULIB_POSIXCHECK
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131 # undef sigaddset
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132 # define sigaddset(s,n) \
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133 (GL_LINK_WARNING ("sigaddset is unportable - " \
8c827f8e5f04 signal, spawn: use link warnings
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134 "use gnulib module sigprocmask for portability"), \
8c827f8e5f04 signal, spawn: use link warnings
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135 sigaddset (s, n))
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136 # undef sigdelset
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137 # define sigdelset(s,n) \
8c827f8e5f04 signal, spawn: use link warnings
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diff changeset
138 (GL_LINK_WARNING ("sigdelset is unportable - " \
8c827f8e5f04 signal, spawn: use link warnings
Eric Blake <ebb9@byu.net>
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139 "use gnulib module sigprocmask for portability"), \
8c827f8e5f04 signal, spawn: use link warnings
Eric Blake <ebb9@byu.net>
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diff changeset
140 sigdelset (s, n))
8c827f8e5f04 signal, spawn: use link warnings
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141 # undef sigemptyset
8c827f8e5f04 signal, spawn: use link warnings
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142 # define sigemptyset(s) \
8c827f8e5f04 signal, spawn: use link warnings
Eric Blake <ebb9@byu.net>
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143 (GL_LINK_WARNING ("sigemptyset is unportable - " \
8c827f8e5f04 signal, spawn: use link warnings
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144 "use gnulib module sigprocmask for portability"), \
8c827f8e5f04 signal, spawn: use link warnings
Eric Blake <ebb9@byu.net>
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diff changeset
145 sigemptyset (s))
8c827f8e5f04 signal, spawn: use link warnings
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146 # undef sigfillset
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147 # define sigfillset(s) \
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148 (GL_LINK_WARNING ("sigfillset is unportable - " \
8c827f8e5f04 signal, spawn: use link warnings
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149 "use gnulib module sigprocmask for portability"), \
8c827f8e5f04 signal, spawn: use link warnings
Eric Blake <ebb9@byu.net>
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diff changeset
150 sigfillset (s))
8c827f8e5f04 signal, spawn: use link warnings
Eric Blake <ebb9@byu.net>
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diff changeset
151 # undef sigismember
8c827f8e5f04 signal, spawn: use link warnings
Eric Blake <ebb9@byu.net>
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diff changeset
152 # define sigismember(s,n) \
8c827f8e5f04 signal, spawn: use link warnings
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diff changeset
153 (GL_LINK_WARNING ("sigismember is unportable - " \
8c827f8e5f04 signal, spawn: use link warnings
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diff changeset
154 "use gnulib module sigprocmask for portability"), \
8c827f8e5f04 signal, spawn: use link warnings
Eric Blake <ebb9@byu.net>
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diff changeset
155 sigismember (s, n))
8c827f8e5f04 signal, spawn: use link warnings
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diff changeset
156 # undef sigpending
8c827f8e5f04 signal, spawn: use link warnings
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diff changeset
157 # define sigpending(s) \
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diff changeset
158 (GL_LINK_WARNING ("sigpending is unportable - " \
8c827f8e5f04 signal, spawn: use link warnings
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diff changeset
159 "use gnulib module sigprocmask for portability"), \
8c827f8e5f04 signal, spawn: use link warnings
Eric Blake <ebb9@byu.net>
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diff changeset
160 sigpending (s))
8c827f8e5f04 signal, spawn: use link warnings
Eric Blake <ebb9@byu.net>
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diff changeset
161 # undef sigprocmask
8c827f8e5f04 signal, spawn: use link warnings
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diff changeset
162 # define sigprocmask(h,s,o) \
8c827f8e5f04 signal, spawn: use link warnings
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diff changeset
163 (GL_LINK_WARNING ("sigprocmask is unportable - " \
8c827f8e5f04 signal, spawn: use link warnings
Eric Blake <ebb9@byu.net>
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diff changeset
164 "use gnulib module sigprocmask for portability"), \
8c827f8e5f04 signal, spawn: use link warnings
Eric Blake <ebb9@byu.net>
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diff changeset
165 sigprocmask (h, s, o))
8c827f8e5f04 signal, spawn: use link warnings
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diff changeset
166 #endif /* @GNULIB_SIGPROCMASK@ */
10229
29502a2dd08a New module sigaction, for mingw.
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167
10483
5a24031ebf7d Support signal handling with SIGPIPE on native Windows platforms.
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diff changeset
168
12535
8c827f8e5f04 signal, spawn: use link warnings
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diff changeset
169 #if @GNULIB_SIGACTION@
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diff changeset
170 # if !@HAVE_SIGACTION@
10229
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171
12535
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diff changeset
172 # if !@HAVE_SIGINFO_T@
10229
29502a2dd08a New module sigaction, for mingw.
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diff changeset
173 /* Present to allow compilation, but unsupported by gnulib. */
29502a2dd08a New module sigaction, for mingw.
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diff changeset
174 union sigval
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175 {
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diff changeset
176 int sival_int;
29502a2dd08a New module sigaction, for mingw.
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diff changeset
177 void *sival_ptr;
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178 };
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179
29502a2dd08a New module sigaction, for mingw.
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diff changeset
180 /* Present to allow compilation, but unsupported by gnulib. */
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diff changeset
181 struct siginfo_t
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182 {
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diff changeset
183 int si_signo;
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diff changeset
184 int si_code;
29502a2dd08a New module sigaction, for mingw.
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diff changeset
185 int si_errno;
29502a2dd08a New module sigaction, for mingw.
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diff changeset
186 pid_t si_pid;
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diff changeset
187 uid_t si_uid;
29502a2dd08a New module sigaction, for mingw.
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diff changeset
188 void *si_addr;
29502a2dd08a New module sigaction, for mingw.
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diff changeset
189 int si_status;
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diff changeset
190 long si_band;
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diff changeset
191 union sigval si_value;
29502a2dd08a New module sigaction, for mingw.
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diff changeset
192 };
29502a2dd08a New module sigaction, for mingw.
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diff changeset
193 typedef struct siginfo_t siginfo_t;
12535
8c827f8e5f04 signal, spawn: use link warnings
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194 # endif /* !@HAVE_SIGINFO_T@ */
10229
29502a2dd08a New module sigaction, for mingw.
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diff changeset
195
10243
f3834f370cbd Comment fixes.
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diff changeset
196 /* We assume that platforms which lack the sigaction() function also lack
f3834f370cbd Comment fixes.
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diff changeset
197 the 'struct sigaction' type, and vice versa. */
10229
29502a2dd08a New module sigaction, for mingw.
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198
29502a2dd08a New module sigaction, for mingw.
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199 struct sigaction
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200 {
29502a2dd08a New module sigaction, for mingw.
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diff changeset
201 union
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diff changeset
202 {
29502a2dd08a New module sigaction, for mingw.
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diff changeset
203 void (*_sa_handler) (int);
29502a2dd08a New module sigaction, for mingw.
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diff changeset
204 /* Present to allow compilation, but unsupported by gnulib. POSIX
29502a2dd08a New module sigaction, for mingw.
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diff changeset
205 says that implementations may, but not must, make sa_sigaction
29502a2dd08a New module sigaction, for mingw.
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diff changeset
206 overlap with sa_handler, but we know of no implementation where
29502a2dd08a New module sigaction, for mingw.
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diff changeset
207 they do not overlap. */
29502a2dd08a New module sigaction, for mingw.
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diff changeset
208 void (*_sa_sigaction) (int, siginfo_t *, void *);
29502a2dd08a New module sigaction, for mingw.
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diff changeset
209 } _sa_func;
29502a2dd08a New module sigaction, for mingw.
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diff changeset
210 sigset_t sa_mask;
29502a2dd08a New module sigaction, for mingw.
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diff changeset
211 /* Not all POSIX flags are supported. */
29502a2dd08a New module sigaction, for mingw.
Eric Blake <ebb9@byu.net>
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diff changeset
212 int sa_flags;
29502a2dd08a New module sigaction, for mingw.
Eric Blake <ebb9@byu.net>
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diff changeset
213 };
12535
8c827f8e5f04 signal, spawn: use link warnings
Eric Blake <ebb9@byu.net>
parents: 12422
diff changeset
214 # define sa_handler _sa_func._sa_handler
8c827f8e5f04 signal, spawn: use link warnings
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diff changeset
215 # define sa_sigaction _sa_func._sa_sigaction
10229
29502a2dd08a New module sigaction, for mingw.
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parents: 10228
diff changeset
216 /* Unsupported flags are not present. */
12535
8c827f8e5f04 signal, spawn: use link warnings
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diff changeset
217 # define SA_RESETHAND 1
8c827f8e5f04 signal, spawn: use link warnings
Eric Blake <ebb9@byu.net>
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diff changeset
218 # define SA_NODEFER 2
8c827f8e5f04 signal, spawn: use link warnings
Eric Blake <ebb9@byu.net>
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diff changeset
219 # define SA_RESTART 4
10229
29502a2dd08a New module sigaction, for mingw.
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diff changeset
220
29502a2dd08a New module sigaction, for mingw.
Eric Blake <ebb9@byu.net>
parents: 10228
diff changeset
221 extern int sigaction (int, const struct sigaction *restrict,
29502a2dd08a New module sigaction, for mingw.
Eric Blake <ebb9@byu.net>
parents: 10228
diff changeset
222 struct sigaction *restrict);
29502a2dd08a New module sigaction, for mingw.
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diff changeset
223
12535
8c827f8e5f04 signal, spawn: use link warnings
Eric Blake <ebb9@byu.net>
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diff changeset
224 # elif !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@
8c827f8e5f04 signal, spawn: use link warnings
Eric Blake <ebb9@byu.net>
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diff changeset
225
8c827f8e5f04 signal, spawn: use link warnings
Eric Blake <ebb9@byu.net>
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diff changeset
226 # define sa_sigaction sa_handler
10321
a6493a165dd2 c-stack: fix regression on Irix 5.3 from 2008-06-21
Eric Blake <ebb9@byu.net>
parents: 10243
diff changeset
227
12535
8c827f8e5f04 signal, spawn: use link warnings
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diff changeset
228 # endif /* !@HAVE_SIGACTION@, !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@ */
8c827f8e5f04 signal, spawn: use link warnings
Eric Blake <ebb9@byu.net>
parents: 12422
diff changeset
229 #elif defined GNULIB_POSIXCHECK
8c827f8e5f04 signal, spawn: use link warnings
Eric Blake <ebb9@byu.net>
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diff changeset
230 # undef sigaction
8c827f8e5f04 signal, spawn: use link warnings
Eric Blake <ebb9@byu.net>
parents: 12422
diff changeset
231 # define sigaction(s,a,o) \
8c827f8e5f04 signal, spawn: use link warnings
Eric Blake <ebb9@byu.net>
parents: 12422
diff changeset
232 (GL_LINK_WARNING ("sigaction is unportable - " \
8c827f8e5f04 signal, spawn: use link warnings
Eric Blake <ebb9@byu.net>
parents: 12422
diff changeset
233 "use gnulib module sigaction for portability"), \
8c827f8e5f04 signal, spawn: use link warnings
Eric Blake <ebb9@byu.net>
parents: 12422
diff changeset
234 sigaction (s, a, o))
8c827f8e5f04 signal, spawn: use link warnings
Eric Blake <ebb9@byu.net>
parents: 12422
diff changeset
235 #endif
9259
cda94d6d670f Rename signal_.h to signal.in.h.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
236
10706
5a35e8f56744 Define a dummy SA_NODEFER macro on Interix.
Bruno Haible <bruno@clisp.org>
parents: 10655
diff changeset
237 /* Some systems don't have SA_NODEFER. */
5a35e8f56744 Define a dummy SA_NODEFER macro on Interix.
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parents: 10655
diff changeset
238 #ifndef SA_NODEFER
5a35e8f56744 Define a dummy SA_NODEFER macro on Interix.
Bruno Haible <bruno@clisp.org>
parents: 10655
diff changeset
239 # define SA_NODEFER 0
5a35e8f56744 Define a dummy SA_NODEFER macro on Interix.
Bruno Haible <bruno@clisp.org>
parents: 10655
diff changeset
240 #endif
5a35e8f56744 Define a dummy SA_NODEFER macro on Interix.
Bruno Haible <bruno@clisp.org>
parents: 10655
diff changeset
241
5a35e8f56744 Define a dummy SA_NODEFER macro on Interix.
Bruno Haible <bruno@clisp.org>
parents: 10655
diff changeset
242
9259
cda94d6d670f Rename signal_.h to signal.in.h.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
243 #ifdef __cplusplus
cda94d6d670f Rename signal_.h to signal.in.h.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
244 }
cda94d6d670f Rename signal_.h to signal.in.h.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
245 #endif
cda94d6d670f Rename signal_.h to signal.in.h.
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parents:
diff changeset
246
cda94d6d670f Rename signal_.h to signal.in.h.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
247 #endif /* _GL_SIGNAL_H */
cda94d6d670f Rename signal_.h to signal.in.h.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
248 #endif /* _GL_SIGNAL_H */
cda94d6d670f Rename signal_.h to signal.in.h.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
249 #endif