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1 /* Define wait system call interface for Emacs.
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2 Copyright (C) 1993, 1994, 1995 Free Software Foundation, Inc.
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3 Copyright (C) 1995 Sun Microsystems, Inc.
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4
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5 This file is part of XEmacs.
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6
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7 XEmacs is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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11
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12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with XEmacs; see the file COPYING. If not, write to
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19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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20 Boston, MA 02111-1307, USA. */
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21
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22 /* Synched up with: FSF 19.30. */
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23
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24 /* Cleaned up by Ben Wing. */
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25
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26 /* Define the structure that the wait system call stores.
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27 On many systems, there is a structure defined for this.
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28 But on vanilla-ish USG systems there is not.
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29
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30 NOTE: POSIX specifies that int, rather than union wait,
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31 be used. BSD systems based on BSD 4.3+ or newer generally
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32 have int, but those based on BSD 4.3 or older have union wait.
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33 */
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34
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35 #ifndef VMS
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36
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37 # ifdef HAVE_SYS_WAIT_H
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38 # include <sys/wait.h>
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39 # endif
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40
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41 # if !defined (HAVE_UNION_WAIT) /* the POSIX / SYSV way */
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42
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43 # define WAITTYPE int
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44 # ifndef WIFSTOPPED
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45 # define WIFSTOPPED(w) (((w) & 0377) == 0177)
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46 # endif
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47 # ifndef WIFSIGNALED
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48 # define WIFSIGNALED(w) (((w) & 0377) != 0177 && ((w) & ~0377) == 0)
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49 # endif
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50 # ifndef WIFEXITED
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51 # define WIFEXITED(w) (((w) & 0377) == 0)
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52 # endif
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53 # ifndef WRETCODE
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54 # ifdef WEXITSTATUS
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55 # define WRETCODE(w) WEXITSTATUS (w)
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56 # else
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57 # define WRETCODE(w) ((w) >> 8)
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58 # endif
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59 # endif
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60 # ifndef WSTOPSIG
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61 # define WSTOPSIG(w) ((w) >> 8)
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62 # endif
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63 # ifndef WTERMSIG
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64 # define WTERMSIG(w) ((w) & 0377)
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65 # endif
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66 # ifndef WCOREDUMP
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67 # define WCOREDUMP(w) (((w) & 0200) != 0)
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68 # endif
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69
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70 # else /* the older BSD way */
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71
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72 # define WAITTYPE union wait
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73
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74 # ifndef WRETCODE
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75 # ifdef WEXITSTATUS
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76 # define WRETCODE(w) WEXITSTATUS(w)
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77 # else
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78 # define WRETCODE(w) w.w_retcode
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79 # endif
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80 # endif
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81
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82 # undef WCOREDUMP /* Later BSDs define this name differently. */
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83 # define WCOREDUMP(w) w.w_coredump
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84
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85 # if defined (HPUX) || defined (convex)
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86 /* HPUX version 7 has broken definitions of these. */
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87 /* pvogel@convex.com says the convex does too. */
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88 # undef WTERMSIG
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89 # undef WSTOPSIG
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90 # undef WIFSTOPPED
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91 # undef WIFSIGNALED
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92 # undef WIFEXITED
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93 # endif /* HPUX | convex */
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94
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95 # ifndef WTERMSIG
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96 # define WTERMSIG(w) w.w_termsig
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97 # endif
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98 # ifndef WSTOPSIG
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99 # define WSTOPSIG(w) w.w_stopsig
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100 # endif
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101 # ifndef WIFSTOPPED
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102 # define WIFSTOPPED(w) (WTERMSIG (w) == 0177)
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103 # endif
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104 # ifndef WIFSIGNALED
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105 # define WIFSIGNALED(w) (WTERMSIG (w) != 0177 && (WSTOPSIG (w)) == 0)
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106 # endif
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107 # ifndef WIFEXITED
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108 # define WIFEXITED(w) (WTERMSIG (w) == 0)
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109 # endif
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110
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111 # endif /* HAVE_UNION_WAIT */
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112
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113 #else /* VMS */
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114
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115 # define WAITTYPE int
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116 # define WIFSTOPPED(w) 0
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117 # define WIFSIGNALED(w) 0
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118 # define WIFEXITED(w) ((w) != -1)
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119 # define WRETCODE(w) (w)
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120 # define WSTOPSIG(w) (w)
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121 # define WCOREDUMP(w) 0
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122 # define WTERMSIG(w) (w)
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123 # include <ssdef.h>
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124 # include <iodef.h>
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125 # include <clidef.h>
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126 # include "vmsproc.h"
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127
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128 #endif /* VMS */
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