1 signal.h |
1 /*- |
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2 * Copyright (c) 1982, 1986, 1989, 1991, 1993 |
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3 * The Regents of the University of California. All rights reserved. |
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4 * (c) UNIX System Laboratories, Inc. |
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5 * All or some portions of this file are derived from material licensed |
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6 * to the University of California by American Telephone and Telegraph |
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7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with |
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8 * the permission of UNIX System Laboratories, Inc. |
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9 * |
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10 * Redistribution and use in source and binary forms, with or without |
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11 * modification, are permitted provided that the following conditions |
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12 * are met: |
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13 * 1. Redistributions of source code must retain the above copyright |
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14 * notice, this list of conditions and the following disclaimer. |
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15 * 2. Redistributions in binary form must reproduce the above copyright |
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16 * notice, this list of conditions and the following disclaimer in the |
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17 * documentation and/or other materials provided with the distribution. |
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18 * 4. Neither the name of the University nor the names of its contributors |
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19 * may be used to endorse or promote products derived from this software |
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20 * without specific prior written permission. |
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21 * |
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22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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32 * SUCH DAMAGE. |
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33 * |
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34 * @(#)signal.h 8.4 (Berkeley) 5/4/95 |
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35 * $FreeBSD: src/sys/sys/signal.h,v 1.45 2004/06/11 11:43:46 phk Exp $ |
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36 */ |
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37 |
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38 #ifndef _SYS_SIGNAL_H_ |
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39 #define _SYS_SIGNAL_H_ |
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40 |
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41 #include <sys/cdefs.h> |
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42 #include <sys/_types.h> |
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43 #include <sys/_sigset.h> |
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44 |
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45 #include <machine/signal.h> /* sig_atomic_t; trap codes; sigcontext */ |
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46 |
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47 /* |
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48 * System defined signals. |
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49 */ |
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50 #define SIGHUP 1 /* hangup */ |
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51 #define SIGINT 2 /* interrupt */ |
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52 #define SIGQUIT 3 /* quit */ |
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53 #define SIGILL 4 /* illegal instr. (not reset when caught) */ |
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54 #define SIGTRAP 5 /* trace trap (not reset when caught) */ |
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55 #define SIGABRT 6 /* abort() */ |
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56 #define SIGIOT SIGABRT /* compatibility */ |
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57 #define SIGEMT 7 /* EMT instruction */ |
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58 #define SIGFPE 8 /* floating point exception */ |
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59 #define SIGKILL 9 /* kill (cannot be caught or ignored) */ |
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60 #define SIGBUS 10 /* bus error */ |
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61 #define SIGSEGV 11 /* segmentation violation */ |
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62 #define SIGSYS 12 /* non-existent system call invoked */ |
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63 #define SIGPIPE 13 /* write on a pipe with no one to read it */ |
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64 #define SIGALRM 14 /* alarm clock */ |
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65 #define SIGTERM 15 /* software termination signal from kill */ |
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66 #define SIGURG 16 /* urgent condition on IO channel */ |
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67 #define SIGSTOP 17 /* sendable stop signal not from tty */ |
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68 #define SIGTSTP 18 /* stop signal from tty */ |
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69 #define SIGCONT 19 /* continue a stopped process */ |
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70 #define SIGCHLD 20 /* to parent on child stop or exit */ |
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71 #define SIGTTIN 21 /* to readers pgrp upon background tty read */ |
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72 #define SIGTTOU 22 /* like TTIN if (tp->t_local<OSTOP) */ |
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73 #define SIGIO 23 /* input/output possible signal */ |
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74 #define SIGXCPU 24 /* exceeded CPU time limit */ |
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75 #define SIGXFSZ 25 /* exceeded file size limit */ |
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76 #define SIGVTALRM 26 /* virtual time alarm */ |
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77 #define SIGPROF 27 /* profiling time alarm */ |
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78 #define SIGWINCH 28 /* window size changes */ |
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79 #define SIGINFO 29 /* information request */ |
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80 #define SIGUSR1 30 /* user defined signal 1 */ |
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81 #define SIGUSR2 31 /* user defined signal 2 */ |
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82 #define SIGTHR 32 /* Thread interrupt. */ |
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83 |
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84 /* |
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85 * XXX missing SIGRTMIN, SIGRTMAX. |
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86 */ |
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87 |
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88 #define SIG_DFL ((__sighandler_t *)0) |
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89 #define SIG_IGN ((__sighandler_t *)1) |
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90 #define SIG_ERR ((__sighandler_t *)-1) |
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91 /* |
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92 * XXX missing SIG_HOLD. |
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93 */ |
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94 |
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95 /*- |
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96 * Type of a signal handling function. |
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97 * |
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98 * Language spec sez signal handlers take exactly one arg, even though we |
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99 * actually supply three. Ugh! |
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100 * |
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101 * We don't try to hide the difference by leaving out the args because |
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102 * that would cause warnings about conformant programs. Nonconformant |
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103 * programs can avoid the warnings by casting to (__sighandler_t *) or |
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104 * sig_t before calling signal() or assigning to sa_handler or sv_handler. |
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105 * |
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106 * The kernel should reverse the cast before calling the function. It |
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107 * has no way to do this, but on most machines 1-arg and 3-arg functions |
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108 * have the same calling protocol so there is no problem in practice. |
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109 * A bit in sa_flags could be used to specify the number of args. |
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110 */ |
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111 typedef void __sighandler_t(int); |
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112 |
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113 #if __POSIX_VISIBLE || __XSI_VISIBLE |
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114 #ifndef _SIGSET_T_DECLARED |
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115 #define _SIGSET_T_DECLARED |
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116 typedef __sigset_t sigset_t; |
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117 #endif |
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118 #endif |
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119 |
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120 |
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121 #if __POSIX_VISIBLE || __XSI_VISIBLE |
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122 struct __siginfo; |
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123 |
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124 /* |
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125 * Signal vector "template" used in sigaction call. |
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126 */ |
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127 struct sigaction { |
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128 union { |
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129 void (*__sa_handler)(int); |
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130 void (*__sa_sigaction)(int, struct __siginfo *, void *); |
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131 } __sigaction_u; /* signal handler */ |
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132 int sa_flags; /* see signal options below */ |
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133 sigset_t sa_mask; /* signal mask to apply */ |
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134 }; |
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135 |
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136 #define sa_handler __sigaction_u.__sa_handler |
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137 #endif |
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138 |
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139 #if __POSIX_VISIBLE || __XSI_VISIBLE |
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140 #define SA_NOCLDSTOP 0x0008 /* do not generate SIGCHLD on child stop */ |
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141 #endif /* __POSIX_VISIBLE || __XSI_VISIBLE */ |
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142 |
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143 #if __XSI_VISIBLE |
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144 #define SA_ONSTACK 0x0001 /* take signal on signal stack */ |
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145 #define SA_RESTART 0x0002 /* restart system call on signal return */ |
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146 #define SA_RESETHAND 0x0004 /* reset to SIG_DFL when taking signal */ |
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147 #define SA_NODEFER 0x0010 /* don't mask the signal we're delivering */ |
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148 #define SA_NOCLDWAIT 0x0020 /* don't keep zombies around */ |
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149 #define SA_SIGINFO 0x0040 /* signal handler with SA_SIGINFO args */ |
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150 #endif |
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151 |
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152 #if __BSD_VISIBLE |
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153 #define NSIG 32 /* number of old signals (counting 0) */ |
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154 #endif |
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155 |
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156 #endif /* !_SYS_SIGNAL_H_ */ |