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1 | 13 | up20180614 | /* $NetBSD: wait.h,v 1.26 2009/01/11 02:45:56 christos Exp $ */
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2 | |||
3 | /*
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4 | * Copyright (c) 1982, 1986, 1989, 1993, 1994
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5 | * The Regents of the University of California. All rights reserved.
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6 | *
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7 | * Redistribution and use in source and binary forms, with or without
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8 | * modification, are permitted provided that the following conditions
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9 | * are met:
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10 | * 1. Redistributions of source code must retain the above copyright
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11 | * notice, this list of conditions and the following disclaimer.
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12 | * 2. Redistributions in binary form must reproduce the above copyright
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13 | * notice, this list of conditions and the following disclaimer in the
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14 | * documentation and/or other materials provided with the distribution.
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15 | * 3. Neither the name of the University nor the names of its contributors
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16 | * may be used to endorse or promote products derived from this software
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17 | * without specific prior written permission.
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18 | *
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19 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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20 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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23 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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25 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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27 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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28 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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29 | * SUCH DAMAGE.
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30 | *
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31 | * @(#)wait.h 8.2 (Berkeley) 7/10/94
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32 | */
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33 | |||
34 | #ifndef _SYS_WAIT_H_
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35 | #define _SYS_WAIT_H_
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36 | |||
37 | #include <sys/featuretest.h> |
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38 | |||
39 | /*
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40 | * This file holds definitions relevent to the wait4 system call
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41 | * and the alternate interfaces that use it (wait, wait3, waitpid).
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42 | */
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43 | |||
44 | /*
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45 | * Macros to test the exit status returned by wait
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46 | * and extract the relevant values.
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47 | */
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48 | #if !( defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE) ) || defined(_KERNEL)
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49 | #define _W_INT(i) (i)
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50 | #else
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51 | #define _W_INT(w) (*(int *)(void *)&(w)) /* convert union wait to int */ |
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52 | #endif
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53 | |||
54 | #define _WSTATUS(x) (_W_INT(x) & 0177) |
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55 | #define _WSTOPPED 0177 /* _WSTATUS if process is stopped */ |
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56 | #define WIFSTOPPED(x) (_WSTATUS(x) == _WSTOPPED)
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57 | #define WSTOPSIG(x) ((int)(((unsigned int)_W_INT(x)) >> 8) & 0xff) |
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58 | #define WIFSIGNALED(x) (_WSTATUS(x) != _WSTOPPED && _WSTATUS(x) != 0) |
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59 | #define WTERMSIG(x) (_WSTATUS(x))
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60 | #define WIFEXITED(x) (_WSTATUS(x) == 0) |
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61 | #define WEXITSTATUS(x) ((int)(((unsigned int)_W_INT(x)) >> 8) & 0xff) |
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62 | #if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE) || defined(_KERNEL)
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63 | #define WCOREFLAG 0200 |
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64 | #define WCOREDUMP(x) (_W_INT(x) & WCOREFLAG)
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65 | |||
66 | #define W_EXITCODE(ret, sig) ((ret) << 8 | (sig)) |
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67 | #define W_STOPCODE(sig) ((sig) << 8 | _WSTOPPED) |
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68 | #endif
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69 | |||
70 | /*
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71 | * Option bits for the third argument of wait4. WNOHANG causes the
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72 | * wait to not hang if there are no stopped or terminated processes, rather
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73 | * returning an error indication in this case (pid==0). WUNTRACED
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74 | * indicates that the caller should receive status about untraced children
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75 | * which stop due to signals. If children are stopped and a wait without
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76 | * this option is done, it is as though they were still running... nothing
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77 | * about them is returned.
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78 | */
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79 | #define WNOHANG 0x00000001 /* don't hang in wait */ |
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80 | #define WUNTRACED 0x00000002 /* tell about stopped, |
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81 | untraced children */
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82 | #if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
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83 | #define WALTSIG 0x00000004 /* wait for processes that exit |
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84 | with an alternate signal (i.e.
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85 | not SIGCHLD) */
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86 | #define WALLSIG 0x00000008 /* wait for processes that exit |
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87 | with any signal, i.e. SIGCHLD
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88 | and alternates */
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89 | |||
90 | /*
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91 | * These are the Linux names of some of the above flags, for compatibility
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92 | * with Linux's clone(2) API.
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93 | */
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94 | #define __WCLONE WALTSIG
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95 | #define __WALL WALLSIG
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96 | |||
97 | /*
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98 | * These bits are used in order to support SVR4 (etc) functionality
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99 | * without replicating sys_wait4 5 times.
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100 | */
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101 | #define WNOWAIT 0x00010000 /* Don't mark child 'P_WAITED' */ |
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102 | #define WNOZOMBIE 0x00020000 /* Ignore zombies */ |
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103 | #define WOPTSCHECKED 0x00040000 /* Compat call, options verified */ |
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104 | #endif /* _XOPEN_SOURCE || _NETBSD_SOURCE */ |
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105 | |||
106 | #if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
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107 | /* POSIX extensions and 4.2/4.3 compatibility: */
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108 | |||
109 | /*
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110 | * Tokens for special values of the "pid" parameter to wait4.
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111 | */
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112 | #define WAIT_ANY (-1) /* any process */ |
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113 | #define WAIT_MYPGRP 0 /* any process in my process group */ |
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114 | |||
115 | #include <sys/types.h> |
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116 | |||
117 | /*
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118 | * Deprecated:
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119 | * Structure of the information in the status word returned by wait4.
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120 | * If w_stopval==WSTOPPED, then the second structure describes
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121 | * the information returned, else the first.
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122 | */
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123 | union wait {
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124 | int w_status; /* used in syscall */ |
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125 | /*
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126 | * Terminated process status.
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127 | */
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128 | struct {
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129 | #if BYTE_ORDER == LITTLE_ENDIAN
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130 | unsigned int w_Termsig:7, /* termination signal */ |
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131 | w_Coredump:1, /* core dump indicator */ |
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132 | w_Retcode:8, /* exit code if w_termsig==0 */ |
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133 | w_Filler:16; /* upper bits filler */ |
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134 | #endif
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135 | #if BYTE_ORDER == BIG_ENDIAN
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136 | unsigned int w_Filler:16, /* upper bits filler */ |
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137 | w_Retcode:8, /* exit code if w_termsig==0 */ |
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138 | w_Coredump:1, /* core dump indicator */ |
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139 | w_Termsig:7; /* termination signal */ |
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140 | #endif
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141 | } w_T; |
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142 | /*
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143 | * Stopped process status. Returned
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144 | * only for traced children unless requested
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145 | * with the WUNTRACED option bit.
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146 | */
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147 | struct {
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148 | #if BYTE_ORDER == LITTLE_ENDIAN
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149 | unsigned int w_Stopval:8, /* == W_STOPPED if stopped */ |
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150 | w_Stopsig:8, /* signal that stopped us */ |
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151 | w_Filler:16; /* upper bits filler */ |
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152 | #endif
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153 | #if BYTE_ORDER == BIG_ENDIAN
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154 | unsigned int w_Filler:16, /* upper bits filler */ |
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155 | w_Stopsig:8, /* signal that stopped us */ |
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156 | w_Stopval:8; /* == W_STOPPED if stopped */ |
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157 | #endif
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158 | } w_S; |
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159 | }; |
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160 | #define w_termsig w_T.w_Termsig
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161 | #define w_coredump w_T.w_Coredump
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162 | #define w_retcode w_T.w_Retcode
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163 | #define w_stopval w_S.w_Stopval
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164 | #define w_stopsig w_S.w_Stopsig
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165 | |||
166 | #define WSTOPPED _WSTOPPED
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167 | #endif /* _XOPEN_SOURCE || _NETBSD_SOURCE */ |
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168 | |||
169 | #ifndef _KERNEL
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170 | #include <sys/cdefs.h> |
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171 | |||
172 | __BEGIN_DECLS |
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173 | struct rusage; /* forward declaration */ |
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174 | |||
175 | pid_t wait(int *);
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176 | pid_t waitpid(pid_t, int *, int); |
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177 | #if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
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178 | #ifndef __LIBC12_SOURCE__
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179 | pid_t wait3(int *, int, struct rusage *) __RENAME(__wait350); |
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180 | pid_t wait4(pid_t, int *, int, struct rusage *) __RENAME(__wait450); |
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181 | #endif
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182 | #endif
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183 | __END_DECLS |
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184 | #endif
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185 | |||
186 | #endif /* !_SYS_WAIT_H_ */ |