1 | /* sys/signal.h */ |
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2 | |
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3 | #ifndef _SYS_SIGNAL_H |
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4 | #define _SYS_SIGNAL_H |
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5 | #ifdef __cplusplus |
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6 | extern "C" { |
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7 | #endif |
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8 | |
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9 | #include "_ansi.h" |
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10 | #include <sys/cdefs.h> |
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11 | #include <sys/features.h> |
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12 | #include <sys/types.h> |
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13 | #include <sys/_sigset.h> |
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14 | #include <sys/_timespec.h> |
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15 | |
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16 | #if !defined(_SIGSET_T_DECLARED) |
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17 | #define _SIGSET_T_DECLARED |
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18 | typedef __sigset_t sigset_t; |
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19 | #endif |
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20 | |
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21 | #if defined(__CYGWIN__) |
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22 | #include <cygwin/signal.h> |
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23 | #else |
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24 | |
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25 | #if defined(_POSIX_REALTIME_SIGNALS) || __POSIX_VISIBLE >= 199309 |
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26 | |
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27 | /* sigev_notify values |
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28 | NOTE: P1003.1c/D10, p. 34 adds SIGEV_THREAD. */ |
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29 | |
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30 | #define SIGEV_NONE 1 /* No asynchronous notification shall be delivered */ |
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31 | /* when the event of interest occurs. */ |
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32 | #define SIGEV_SIGNAL 2 /* A queued signal, with an application defined */ |
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33 | /* value, shall be delivered when the event of */ |
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34 | /* interest occurs. */ |
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35 | #define SIGEV_THREAD 3 /* A notification function shall be called to */ |
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36 | /* perform notification. */ |
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37 | |
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38 | /* Signal Generation and Delivery, P1003.1b-1993, p. 63 |
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39 | NOTE: P1003.1c/D10, p. 34 adds sigev_notify_function and |
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40 | sigev_notify_attributes to the sigevent structure. */ |
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41 | |
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42 | union sigval { |
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43 | int sival_int; /* Integer signal value */ |
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44 | void *sival_ptr; /* Pointer signal value */ |
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45 | }; |
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46 | |
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47 | struct sigevent { |
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48 | int sigev_notify; /* Notification type */ |
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49 | int sigev_signo; /* Signal number */ |
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50 | union sigval sigev_value; /* Signal value */ |
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51 | |
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52 | #if defined(_POSIX_THREADS) |
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53 | void (*sigev_notify_function)( union sigval ); |
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54 | /* Notification function */ |
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55 | pthread_attr_t *sigev_notify_attributes; /* Notification Attributes */ |
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56 | #endif |
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57 | }; |
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58 | |
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59 | /* Signal Actions, P1003.1b-1993, p. 64 */ |
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60 | /* si_code values, p. 66 */ |
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61 | |
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62 | #define SI_USER 1 /* Sent by a user. kill(), abort(), etc */ |
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63 | #define SI_QUEUE 2 /* Sent by sigqueue() */ |
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64 | #define SI_TIMER 3 /* Sent by expiration of a timer_settime() timer */ |
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65 | #define SI_ASYNCIO 4 /* Indicates completion of asycnhronous IO */ |
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66 | #define SI_MESGQ 5 /* Indicates arrival of a message at an empty queue */ |
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67 | |
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68 | typedef struct { |
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69 | int si_signo; /* Signal number */ |
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70 | int si_code; /* Cause of the signal */ |
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71 | union sigval si_value; /* Signal value */ |
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72 | } siginfo_t; |
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73 | #endif /* defined(_POSIX_REALTIME_SIGNALS) || __POSIX_VISIBLE >= 199309 */ |
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74 | |
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75 | #if defined(__rtems__) |
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76 | |
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77 | /* 3.3.8 Synchronously Accept a Signal, P1003.1b-1993, p. 76 */ |
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78 | |
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79 | #define SA_NOCLDSTOP 0x1 /* Do not generate SIGCHLD when children stop */ |
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80 | #define SA_SIGINFO 0x2 /* Invoke the signal catching function with */ |
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81 | /* three arguments instead of one. */ |
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82 | #if __BSD_VISIBLE || __XSI_VISIBLE >= 4 || __POSIX_VISIBLE >= 200809 |
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83 | #define SA_ONSTACK 0x4 /* Signal delivery will be on a separate stack. */ |
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84 | #endif |
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85 | |
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86 | /* struct sigaction notes from POSIX: |
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87 | * |
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88 | * (1) Routines stored in sa_handler should take a single int as |
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89 | * their argument although the POSIX standard does not require this. |
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90 | * This is not longer true since at least POSIX.1-2008 |
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91 | * (2) The fields sa_handler and sa_sigaction may overlap, and a conforming |
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92 | * application should not use both simultaneously. |
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93 | */ |
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94 | |
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95 | typedef void (*_sig_func_ptr)(int); |
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96 | |
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97 | struct sigaction { |
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98 | int sa_flags; /* Special flags to affect behavior of signal */ |
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99 | sigset_t sa_mask; /* Additional set of signals to be blocked */ |
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100 | /* during execution of signal-catching */ |
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101 | /* function. */ |
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102 | union { |
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103 | _sig_func_ptr _handler; /* SIG_DFL, SIG_IGN, or pointer to a function */ |
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104 | #if defined(_POSIX_REALTIME_SIGNALS) |
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105 | void (*_sigaction)( int, siginfo_t *, void * ); |
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106 | #endif |
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107 | } _signal_handlers; |
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108 | }; |
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109 | |
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110 | #define sa_handler _signal_handlers._handler |
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111 | #if defined(_POSIX_REALTIME_SIGNALS) |
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112 | #define sa_sigaction _signal_handlers._sigaction |
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113 | #endif |
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114 | |
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115 | #else /* defined(__rtems__) */ |
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116 | |
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117 | #define SA_NOCLDSTOP 1 /* only value supported now for sa_flags */ |
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118 | |
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119 | typedef void (*_sig_func_ptr)(int); |
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120 | |
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121 | struct sigaction |
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122 | { |
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123 | _sig_func_ptr sa_handler; |
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124 | sigset_t sa_mask; |
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125 | int sa_flags; |
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126 | }; |
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127 | #endif /* defined(__rtems__) */ |
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128 | #endif /* defined(__CYGWIN__) */ |
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129 | |
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130 | #if __BSD_VISIBLE || __XSI_VISIBLE >= 4 || __POSIX_VISIBLE >= 200809 |
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131 | /* |
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132 | * Minimum and default signal stack constants. Allow for target overrides |
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133 | * from <sys/features.h>. |
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134 | */ |
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135 | #ifndef MINSIGSTKSZ |
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136 | #define MINSIGSTKSZ 2048 |
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137 | #endif |
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138 | #ifndef SIGSTKSZ |
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139 | #define SIGSTKSZ 8192 |
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140 | #endif |
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141 | |
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142 | /* |
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143 | * Possible values for ss_flags in stack_t below. |
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144 | */ |
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145 | #define SS_ONSTACK 0x1 |
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146 | #define SS_DISABLE 0x2 |
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147 | |
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148 | #endif |
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149 | |
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150 | /* |
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151 | * Structure used in sigaltstack call. |
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152 | */ |
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153 | typedef struct sigaltstack { |
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154 | void *ss_sp; /* Stack base or pointer. */ |
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155 | int ss_flags; /* Flags. */ |
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156 | size_t ss_size; /* Stack size. */ |
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157 | } stack_t; |
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158 | |
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159 | #if __POSIX_VISIBLE |
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160 | #define SIG_SETMASK 0 /* set mask with sigprocmask() */ |
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161 | #define SIG_BLOCK 1 /* set of signals to block */ |
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162 | #define SIG_UNBLOCK 2 /* set of signals to, well, unblock */ |
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163 | |
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164 | int sigprocmask (int how, const sigset_t *set, sigset_t *oset); |
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165 | #endif |
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166 | |
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167 | #if __POSIX_VISIBLE >= 199506 |
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168 | int pthread_sigmask (int how, const sigset_t *set, sigset_t *oset); |
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169 | #endif |
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170 | |
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171 | #ifdef _COMPILING_NEWLIB |
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172 | int _kill (pid_t, int); |
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173 | #endif /* _COMPILING_NEWLIB */ |
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174 | |
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175 | #if __POSIX_VISIBLE |
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176 | int kill (pid_t, int); |
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177 | #endif |
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178 | |
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179 | #if __BSD_VISIBLE || __XSI_VISIBLE >= 4 |
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180 | int killpg (pid_t, int); |
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181 | #endif |
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182 | #if __POSIX_VISIBLE |
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183 | int sigaction (int, const struct sigaction *, struct sigaction *); |
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184 | int sigaddset (sigset_t *, const int); |
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185 | int sigdelset (sigset_t *, const int); |
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186 | int sigismember (const sigset_t *, int); |
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187 | int sigfillset (sigset_t *); |
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188 | int sigemptyset (sigset_t *); |
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189 | int sigpending (sigset_t *); |
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190 | int sigsuspend (const sigset_t *); |
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191 | int sigwait (const sigset_t *set, int *sig); |
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192 | |
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193 | #if !defined(__CYGWIN__) && !defined(__rtems__) |
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194 | /* These depend upon the type of sigset_t, which right now |
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195 | is always a long.. They're in the POSIX namespace, but |
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196 | are not ANSI. */ |
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197 | #define sigaddset(what,sig) (*(what) |= (1<<(sig)), 0) |
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198 | #define sigdelset(what,sig) (*(what) &= ~(1<<(sig)), 0) |
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199 | #define sigemptyset(what) (*(what) = 0, 0) |
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200 | #define sigfillset(what) (*(what) = ~(0), 0) |
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201 | #define sigismember(what,sig) (((*(what)) & (1<<(sig))) != 0) |
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202 | #endif /* !__CYGWIN__ && !__rtems__ */ |
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203 | #endif /* __POSIX_VISIBLE */ |
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204 | |
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205 | /* There are two common sigpause variants, both of which take an int argument. |
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206 | If you request _XOPEN_SOURCE or _GNU_SOURCE, you get the System V version, |
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207 | which removes the given signal from the process's signal mask; otherwise |
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208 | you get the BSD version, which sets the process's signal mask to the given |
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209 | value. */ |
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210 | #if __XSI_VISIBLE && !defined(__INSIDE_CYGWIN__) |
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211 | # ifdef __GNUC__ |
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212 | int sigpause (int) __asm__ (__ASMNAME ("__xpg_sigpause")); |
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213 | # else |
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214 | int __xpg_sigpause (int); |
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215 | # define sigpause __xpg_sigpause |
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216 | # endif |
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217 | #elif __BSD_VISIBLE |
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218 | int sigpause (int); |
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219 | #endif |
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220 | |
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221 | #if __BSD_VISIBLE || __XSI_VISIBLE >= 4 || __POSIX_VISIBLE >= 200809 |
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222 | int sigaltstack (const stack_t *__restrict, stack_t *__restrict); |
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223 | #endif |
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224 | |
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225 | #if __POSIX_VISIBLE >= 199506 |
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226 | int pthread_kill (pthread_t thread, int sig); |
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227 | #endif |
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228 | |
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229 | #if __POSIX_VISIBLE >= 199309 |
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230 | |
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231 | /* 3.3.8 Synchronously Accept a Signal, P1003.1b-1993, p. 76 |
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232 | NOTE: P1003.1c/D10, p. 39 adds sigwait(). */ |
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233 | |
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234 | int sigwaitinfo (const sigset_t *set, siginfo_t *info); |
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235 | int sigtimedwait (const sigset_t *set, siginfo_t *info, |
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236 | const struct timespec *timeout); |
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237 | /* 3.3.9 Queue a Signal to a Process, P1003.1b-1993, p. 78 */ |
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238 | int sigqueue (pid_t pid, int signo, const union sigval value); |
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239 | |
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240 | #endif /* __POSIX_VISIBLE >= 199309 */ |
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241 | |
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242 | #if defined(___AM29K__) |
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243 | /* These all need to be defined for ANSI C, but I don't think they are |
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244 | meaningful. */ |
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245 | #define SIGABRT 1 |
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246 | #define SIGFPE 1 |
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247 | #define SIGILL 1 |
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248 | #define SIGINT 1 |
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249 | #define SIGSEGV 1 |
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250 | #define SIGTERM 1 |
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251 | /* These need to be defined for POSIX, and some others do too. */ |
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252 | #define SIGHUP 1 |
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253 | #define SIGQUIT 1 |
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254 | #define NSIG 2 |
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255 | #elif defined(__GO32__) |
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256 | #define SIGINT 1 |
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257 | #define SIGKILL 2 |
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258 | #define SIGPIPE 3 |
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259 | #define SIGFPE 4 |
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260 | #define SIGHUP 5 |
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261 | #define SIGTERM 6 |
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262 | #define SIGSEGV 7 |
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263 | #define SIGTSTP 8 |
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264 | #define SIGQUIT 9 |
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265 | #define SIGTRAP 10 |
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266 | #define SIGILL 11 |
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267 | #define SIGEMT 12 |
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268 | #define SIGALRM 13 |
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269 | #define SIGBUS 14 |
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270 | #define SIGLOST 15 |
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271 | #define SIGSTOP 16 |
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272 | #define SIGABRT 17 |
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273 | #define SIGUSR1 18 |
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274 | #define SIGUSR2 19 |
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275 | #define NSIG 20 |
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276 | #elif !defined(SIGTRAP) |
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277 | #define SIGHUP 1 /* hangup */ |
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278 | #define SIGINT 2 /* interrupt */ |
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279 | #define SIGQUIT 3 /* quit */ |
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280 | #define SIGILL 4 /* illegal instruction (not reset when caught) */ |
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281 | #define SIGTRAP 5 /* trace trap (not reset when caught) */ |
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282 | #define SIGIOT 6 /* IOT instruction */ |
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283 | #define SIGABRT 6 /* used by abort, replace SIGIOT in the future */ |
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284 | #define SIGEMT 7 /* EMT instruction */ |
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285 | #define SIGFPE 8 /* floating point exception */ |
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286 | #define SIGKILL 9 /* kill (cannot be caught or ignored) */ |
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287 | #define SIGBUS 10 /* bus error */ |
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288 | #define SIGSEGV 11 /* segmentation violation */ |
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289 | #define SIGSYS 12 /* bad argument to system call */ |
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290 | #define SIGPIPE 13 /* write on a pipe with no one to read it */ |
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291 | #define SIGALRM 14 /* alarm clock */ |
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292 | #define SIGTERM 15 /* software termination signal from kill */ |
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293 | |
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294 | #if defined(__rtems__) |
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295 | #define SIGURG 16 /* urgent condition on IO channel */ |
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296 | #define SIGSTOP 17 /* sendable stop signal not from tty */ |
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297 | #define SIGTSTP 18 /* stop signal from tty */ |
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298 | #define SIGCONT 19 /* continue a stopped process */ |
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299 | #define SIGCHLD 20 /* to parent on child stop or exit */ |
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300 | #define SIGCLD 20 /* System V name for SIGCHLD */ |
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301 | #define SIGTTIN 21 /* to readers pgrp upon background tty read */ |
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302 | #define SIGTTOU 22 /* like TTIN for output if (tp->t_local<OSTOP) */ |
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303 | #define SIGIO 23 /* input/output possible signal */ |
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304 | #define SIGPOLL SIGIO /* System V name for SIGIO */ |
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305 | #define SIGWINCH 24 /* window changed */ |
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306 | #define SIGUSR1 25 /* user defined signal 1 */ |
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307 | #define SIGUSR2 26 /* user defined signal 2 */ |
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308 | |
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309 | /* Real-Time Signals Range, P1003.1b-1993, p. 61 |
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310 | NOTE: By P1003.1b-1993, this should be at least RTSIG_MAX |
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311 | (which is a minimum of 8) signals. |
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312 | */ |
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313 | #define SIGRTMIN 27 |
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314 | #define SIGRTMAX 31 |
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315 | #define __SIGFIRSTNOTRT SIGHUP |
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316 | #define __SIGLASTNOTRT SIGUSR2 |
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317 | |
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318 | #define NSIG 32 /* signal 0 implied */ |
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319 | |
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320 | #elif defined(__svr4__) |
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321 | /* svr4 specifics. different signals above 15, and sigaction. */ |
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322 | #define SIGUSR1 16 |
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323 | #define SIGUSR2 17 |
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324 | #define SIGCLD 18 |
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325 | #define SIGPWR 19 |
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326 | #define SIGWINCH 20 |
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327 | #define SIGPOLL 22 /* 20 for x.out binaries!!!! */ |
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328 | #define SIGSTOP 23 /* sendable stop signal not from tty */ |
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329 | #define SIGTSTP 24 /* stop signal from tty */ |
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330 | #define SIGCONT 25 /* continue a stopped process */ |
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331 | #define SIGTTIN 26 /* to readers pgrp upon background tty read */ |
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332 | #define SIGTTOU 27 /* like TTIN for output if (tp->t_local<OSTOP) */ |
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333 | #define NSIG 28 |
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334 | #else |
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335 | #define SIGURG 16 /* urgent condition on IO channel */ |
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336 | #define SIGSTOP 17 /* sendable stop signal not from tty */ |
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337 | #define SIGTSTP 18 /* stop signal from tty */ |
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338 | #define SIGCONT 19 /* continue a stopped process */ |
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339 | #define SIGCHLD 20 /* to parent on child stop or exit */ |
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340 | #define SIGCLD 20 /* System V name for SIGCHLD */ |
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341 | #define SIGTTIN 21 /* to readers pgrp upon background tty read */ |
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342 | #define SIGTTOU 22 /* like TTIN for output if (tp->t_local<OSTOP) */ |
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343 | #define SIGIO 23 /* input/output possible signal */ |
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344 | #define SIGPOLL SIGIO /* System V name for SIGIO */ |
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345 | #define SIGXCPU 24 /* exceeded CPU time limit */ |
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346 | #define SIGXFSZ 25 /* exceeded file size limit */ |
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347 | #define SIGVTALRM 26 /* virtual time alarm */ |
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348 | #define SIGPROF 27 /* profiling time alarm */ |
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349 | #define SIGWINCH 28 /* window changed */ |
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350 | #define SIGLOST 29 /* resource lost (eg, record-lock lost) */ |
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351 | #define SIGUSR1 30 /* user defined signal 1 */ |
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352 | #define SIGUSR2 31 /* user defined signal 2 */ |
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353 | #define NSIG 32 /* signal 0 implied */ |
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354 | #endif |
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355 | #endif |
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356 | |
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357 | #ifdef __cplusplus |
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358 | } |
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359 | #endif |
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360 | |
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361 | #if defined(__CYGWIN__) |
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362 | #if __XSI_VISIBLE >= 4 || __POSIX_VISIBLE >= 200809 |
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363 | #include <sys/ucontext.h> |
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364 | #endif |
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365 | #endif |
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366 | |
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367 | #ifndef _SIGNAL_H_ |
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368 | /* Some applications take advantage of the fact that <sys/signal.h> |
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369 | * and <signal.h> are equivalent in glibc. Allow for that here. */ |
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370 | #include <signal.h> |
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371 | #endif |
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372 | #endif /* _SYS_SIGNAL_H */ |
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