1 | /* |
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2 | * Copyright (c) 1991, 1993 |
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3 | * The Regents of the University of California. All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * 1. Redistributions of source code must retain the above copyright |
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9 | * notice, this list of conditions and the following disclaimer. |
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10 | * 2. Redistributions in binary form must reproduce the above copyright |
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11 | * notice, this list of conditions and the following disclaimer in the |
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12 | * documentation and/or other materials provided with the distribution. |
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13 | * 3. All advertising materials mentioning features or use of this software |
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14 | * must display the following acknowledgement: |
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15 | * This product includes software developed by the University of |
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16 | * California, Berkeley and its contributors. |
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17 | * 4. Neither the name of the University nor the names of its contributors |
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18 | * may be used to endorse or promote products derived from this software |
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19 | * without specific prior written permission. |
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20 | * |
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21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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31 | * SUCH DAMAGE. |
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32 | * |
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33 | * @(#)signalvar.h 8.6 (Berkeley) 2/19/95 |
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34 | * $Id$ |
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35 | */ |
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36 | |
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37 | #ifndef _SYS_SIGNALVAR_H_ /* tmp for user.h */ |
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38 | #define _SYS_SIGNALVAR_H_ |
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39 | |
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40 | /* |
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41 | * Kernel signal definitions and data structures, |
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42 | * not exported to user programs. |
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43 | */ |
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44 | |
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45 | /* |
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46 | * Process signal actions and state, needed only within the process |
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47 | * (not necessarily resident). |
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48 | */ |
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49 | struct sigacts { |
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50 | sig_t ps_sigact[NSIG]; /* disposition of signals */ |
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51 | sigset_t ps_catchmask[NSIG]; /* signals to be blocked */ |
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52 | sigset_t ps_sigonstack; /* signals to take on sigstack */ |
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53 | sigset_t ps_sigintr; /* signals that interrupt syscalls */ |
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54 | sigset_t ps_sigreset; /* signals that reset when caught */ |
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55 | sigset_t ps_signodefer; /* signals not masked while handled */ |
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56 | sigset_t ps_oldmask; /* saved mask from before sigpause */ |
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57 | int ps_flags; /* signal flags, below */ |
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58 | struct sigaltstack ps_sigstk; /* sp & on stack state variable */ |
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59 | int ps_sig; /* for core dump/debugger XXX */ |
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60 | u_long ps_code; /* for core dump/debugger XXX */ |
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61 | sigset_t ps_usertramp; /* SunOS compat; libc sigtramp XXX */ |
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62 | }; |
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63 | |
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64 | /* signal flags */ |
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65 | #define SAS_OLDMASK 0x01 /* need to restore mask before pause */ |
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66 | #define SAS_ALTSTACK 0x02 /* have alternate signal stack */ |
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67 | |
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68 | /* additional signal action values, used only temporarily/internally */ |
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69 | #define SIG_CATCH ((__sighandler_t *)2) |
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70 | #define SIG_HOLD ((__sighandler_t *)3) |
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71 | |
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72 | /* |
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73 | * get signal action for process and signal; currently only for current process |
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74 | */ |
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75 | #define SIGACTION(p, sig) (p->p_sigacts->ps_sigact[(sig)]) |
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76 | |
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77 | /* |
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78 | * Determine signal that should be delivered to process p, the current |
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79 | * process, 0 if none. If there is a pending stop signal with default |
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80 | * action, the process stops in issignal(). |
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81 | */ |
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82 | #define CURSIG(p) \ |
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83 | (((p)->p_siglist == 0 || \ |
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84 | (((p)->p_flag & P_TRACED) == 0 && \ |
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85 | ((p)->p_siglist & ~(p)->p_sigmask) == 0)) ? \ |
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86 | 0 : issignal(p)) |
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87 | |
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88 | /* |
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89 | * Clear a pending signal from a process. |
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90 | */ |
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91 | #define CLRSIG(p, sig) { (p)->p_siglist &= ~sigmask(sig); } |
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92 | |
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93 | /* |
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94 | * Signal properties and actions. |
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95 | * The array below categorizes the signals and their default actions |
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96 | * according to the following properties: |
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97 | */ |
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98 | #define SA_KILL 0x01 /* terminates process by default */ |
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99 | #define SA_CORE 0x02 /* ditto and coredumps */ |
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100 | #define SA_STOP 0x04 /* suspend process */ |
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101 | #define SA_TTYSTOP 0x08 /* ditto, from tty */ |
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102 | #define SA_IGNORE 0x10 /* ignore by default */ |
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103 | #define SA_CONT 0x20 /* continue if suspended */ |
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104 | #define SA_CANTMASK 0x40 /* non-maskable, catchable */ |
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105 | |
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106 | #ifdef SIGPROP |
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107 | static int sigprop[NSIG + 1] = { |
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108 | 0, /* unused */ |
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109 | SA_KILL, /* SIGHUP */ |
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110 | SA_KILL, /* SIGINT */ |
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111 | SA_KILL|SA_CORE, /* SIGQUIT */ |
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112 | SA_KILL|SA_CORE, /* SIGILL */ |
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113 | SA_KILL|SA_CORE, /* SIGTRAP */ |
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114 | SA_KILL|SA_CORE, /* SIGABRT */ |
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115 | SA_KILL|SA_CORE, /* SIGEMT */ |
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116 | SA_KILL|SA_CORE, /* SIGFPE */ |
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117 | SA_KILL, /* SIGKILL */ |
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118 | SA_KILL|SA_CORE, /* SIGBUS */ |
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119 | SA_KILL|SA_CORE, /* SIGSEGV */ |
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120 | SA_KILL|SA_CORE, /* SIGSYS */ |
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121 | SA_KILL, /* SIGPIPE */ |
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122 | SA_KILL, /* SIGALRM */ |
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123 | SA_KILL, /* SIGTERM */ |
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124 | SA_IGNORE, /* SIGURG */ |
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125 | SA_STOP, /* SIGSTOP */ |
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126 | SA_STOP|SA_TTYSTOP, /* SIGTSTP */ |
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127 | SA_IGNORE|SA_CONT, /* SIGCONT */ |
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128 | SA_IGNORE, /* SIGCHLD */ |
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129 | SA_STOP|SA_TTYSTOP, /* SIGTTIN */ |
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130 | SA_STOP|SA_TTYSTOP, /* SIGTTOU */ |
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131 | SA_IGNORE, /* SIGIO */ |
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132 | SA_KILL, /* SIGXCPU */ |
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133 | SA_KILL, /* SIGXFSZ */ |
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134 | SA_KILL, /* SIGVTALRM */ |
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135 | SA_KILL, /* SIGPROF */ |
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136 | SA_IGNORE, /* SIGWINCH */ |
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137 | SA_IGNORE, /* SIGINFO */ |
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138 | SA_KILL, /* SIGUSR1 */ |
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139 | SA_KILL, /* SIGUSR2 */ |
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140 | }; |
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141 | |
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142 | #define contsigmask (sigmask(SIGCONT)) |
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143 | #define stopsigmask (sigmask(SIGSTOP) | sigmask(SIGTSTP) | \ |
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144 | sigmask(SIGTTIN) | sigmask(SIGTTOU)) |
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145 | |
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146 | #endif /* SIGPROP */ |
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147 | |
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148 | #define sigcantmask (sigmask(SIGKILL) | sigmask(SIGSTOP)) |
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149 | |
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150 | #ifdef KERNEL |
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151 | /* |
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152 | * Machine-independent functions: |
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153 | */ |
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154 | void execsigs __P((struct proc *p)); |
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155 | void gsignal __P((int pgid, int sig)); |
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156 | int issignal __P((struct proc *p)); |
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157 | void killproc __P((struct proc *p, char *why)); |
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158 | void pgsignal __P((struct pgrp *pgrp, int sig, int checkctty)); |
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159 | void postsig __P((int sig)); |
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160 | void psignal __P((struct proc *p, int sig)); |
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161 | void setsigvec __P((struct proc *p, int signum, struct sigaction *sa)); |
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162 | void sigexit __P((struct proc *p, int signum)); |
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163 | void siginit __P((struct proc *p)); |
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164 | void trapsignal __P((struct proc *p, int sig, u_long code)); |
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165 | |
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166 | /* |
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167 | * Machine-dependent functions: |
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168 | */ |
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169 | void sendsig __P((sig_t action, int sig, int returnmask, u_long code)); |
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170 | #endif /* KERNEL */ |
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171 | #endif /* !_SYS_SIGNALVAR_H_ */ |
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