lib/sys_wait.in.h

   1 /* A POSIX-like <sys/wait.h>.
   2    Copyright (C) 2001-2003, 2005-2019 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2, or (at your option)
   7    any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, see <https://www.gnu.org/licenses/>.  */
  16
  17
  18 #ifndef _@GUARD_PREFIX@_SYS_WAIT_H
  19
  20 #if __GNUC__ >= 3
  21 @PRAGMA_SYSTEM_HEADER@
  22 #endif
  23 @PRAGMA_COLUMNS@
  24
  25 /* The include_next requires a split double-inclusion guard.  */
  26 #if !(defined _WIN32 && ! defined __CYGWIN__)
  27 # @INCLUDE_NEXT@ @NEXT_SYS_WAIT_H@
  28 #endif
  29
  30 #ifndef _@GUARD_PREFIX@_SYS_WAIT_H
  31 #define _@GUARD_PREFIX@_SYS_WAIT_H
  32
  33 /* Get pid_t.  */
  34 #include <sys/types.h>
  35
  36
  37 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
  38
  39 /* The definition of _GL_WARN_ON_USE is copied here.  */
  40
  41
  42 #if !(defined _WIN32 && ! defined __CYGWIN__)
  43 /* Unix API.  */
  44
  45 /* The following macros apply to an argument x, that is a status of a process,
  46    as returned by waitpid().
  47    On nearly all systems, including Linux/x86, WEXITSTATUS are bits 15..8 and
  48    WTERMSIG are bits 7..0, while BeOS uses the opposite.  Therefore programs
  49    have to use the abstract macros.  */
  50
  51 /* For valid x, exactly one of WIFSIGNALED(x), WIFEXITED(x), WIFSTOPPED(x)
  52    is true.  */
  53 # ifndef WIFSIGNALED
  54 #  define WIFSIGNALED(x) (WTERMSIG (x) != 0 && WTERMSIG(x) != 0x7f)
  55 # endif
  56 # ifndef WIFEXITED
  57 #  define WIFEXITED(x) (WTERMSIG (x) == 0)
  58 # endif
  59 # ifndef WIFSTOPPED
  60 #  define WIFSTOPPED(x) (WTERMSIG (x) == 0x7f)
  61 # endif
  62
  63 /* The termination signal. Only to be accessed if WIFSIGNALED(x) is true.  */
  64 # ifndef WTERMSIG
  65 #  define WTERMSIG(x) ((x) & 0x7f)
  66 # endif
  67
  68 /* The exit status. Only to be accessed if WIFEXITED(x) is true.  */
  69 # ifndef WEXITSTATUS
  70 #  define WEXITSTATUS(x) (((x) >> 8) & 0xff)
  71 # endif
  72
  73 /* The stopping signal. Only to be accessed if WIFSTOPPED(x) is true.  */
  74 # ifndef WSTOPSIG
  75 #  define WSTOPSIG(x) (((x) >> 8) & 0x7f)
  76 # endif
  77
  78 /* True if the process dumped core.  Not standardized by POSIX.  */
  79 # ifndef WCOREDUMP
  80 #  define WCOREDUMP(x) ((x) & 0x80)
  81 # endif
  82
  83 #else
  84 /* Native Windows API.  */
  85
  86 # include <signal.h> /* for SIGTERM */
  87
  88 /* The following macros apply to an argument x, that is a status of a process,
  89    as returned by waitpid() or, equivalently, _cwait() or GetExitCodeProcess().
  90    This value is simply an 'int', not composed of bit fields.  */
  91
  92 /* When an unhandled fatal signal terminates a process, the exit code is 3.  */
  93 # define WIFSIGNALED(x) ((x) == 3)
  94 # define WIFEXITED(x) ((x) != 3)
  95 # define WIFSTOPPED(x) 0
  96
  97 /* The signal that terminated a process is not known posthum.  */
  98 # define WTERMSIG(x) SIGTERM
  99
 100 # define WEXITSTATUS(x) (x)
 101
 102 /* There are no stopping signals.  */
 103 # define WSTOPSIG(x) 0
 104
 105 /* There are no core dumps.  */
 106 # define WCOREDUMP(x) 0
 107
 108 #endif
 109
 110
 111 /* Declarations of functions.  */
 112
 113 #if @GNULIB_WAITPID@
 114 # if defined _WIN32 && ! defined __CYGWIN__
 115 _GL_FUNCDECL_SYS (waitpid, pid_t, (pid_t pid, int *statusp, int options));
 116 # endif
 117 _GL_CXXALIAS_SYS (waitpid, pid_t, (pid_t pid, int *statusp, int options));
 118 _GL_CXXALIASWARN (waitpid);
 119 #elif defined GNULIB_POSIXCHECK
 120 # undef waitpid
 121 # if HAVE_RAW_DECL_WAITPID
 122 _GL_WARN_ON_USE (waitpid, "waitpid is unportable - "
 123                  "use gnulib module sys_wait for portability");
 124 # endif
 125 #endif
 126
 127
 128 #endif /* _@GUARD_PREFIX@_SYS_WAIT_H */
 129 #endif /* _@GUARD_PREFIX@_SYS_WAIT_H */