1  /* A POSIX-like <sys/wait.h>.
       2     Copyright (C) 2001-2003, 2005-2023 Free Software Foundation, Inc.
       3  
       4     This file is free software: you can redistribute it and/or modify
       5     it under the terms of the GNU Lesser General Public License as
       6     published by the Free Software Foundation; either version 2.1 of the
       7     License, or (at your option) any later version.
       8  
       9     This file 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 Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser 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  /* This file uses GNULIB_POSIXCHECK, HAVE_RAW_DECL_*.  */
      34  #if !_GL_CONFIG_H_INCLUDED
      35   #error "Please include config.h first."
      36  #endif
      37  
      38  /* Get pid_t.  */
      39  #include <sys/types.h>
      40  
      41  
      42  /* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
      43  
      44  /* The definition of _GL_WARN_ON_USE is copied here.  */
      45  
      46  
      47  #if !(defined _WIN32 && ! defined __CYGWIN__)
      48  /* Unix API.  */
      49  
      50  /* The following macros apply to an argument x, that is a status of a process,
      51     as returned by waitpid().
      52     On nearly all systems, including Linux/x86, WEXITSTATUS are bits 15..8 and
      53     WTERMSIG are bits 7..0, while BeOS uses the opposite.  Therefore programs
      54     have to use the abstract macros.  */
      55  
      56  /* For valid x, exactly one of WIFSIGNALED(x), WIFEXITED(x), WIFSTOPPED(x)
      57     is true.  */
      58  # ifndef WIFSIGNALED
      59  #  define WIFSIGNALED(x) (WTERMSIG (x) != 0 && WTERMSIG(x) != 0x7f)
      60  # endif
      61  # ifndef WIFEXITED
      62  #  define WIFEXITED(x) (WTERMSIG (x) == 0)
      63  # endif
      64  # ifndef WIFSTOPPED
      65  #  define WIFSTOPPED(x) (WTERMSIG (x) == 0x7f)
      66  # endif
      67  
      68  /* The termination signal. Only to be accessed if WIFSIGNALED(x) is true.  */
      69  # ifndef WTERMSIG
      70  #  define WTERMSIG(x) ((x) & 0x7f)
      71  # endif
      72  
      73  /* The exit status. Only to be accessed if WIFEXITED(x) is true.  */
      74  # ifndef WEXITSTATUS
      75  #  define WEXITSTATUS(x) (((x) >> 8) & 0xff)
      76  # endif
      77  
      78  /* The stopping signal. Only to be accessed if WIFSTOPPED(x) is true.  */
      79  # ifndef WSTOPSIG
      80  #  define WSTOPSIG(x) (((x) >> 8) & 0x7f)
      81  # endif
      82  
      83  /* True if the process dumped core.  Not standardized by POSIX.  */
      84  # ifndef WCOREDUMP
      85  #  define WCOREDUMP(x) ((x) & 0x80)
      86  # endif
      87  
      88  #else
      89  /* Native Windows API.  */
      90  
      91  # include <signal.h> /* for SIGTERM */
      92  
      93  /* The following macros apply to an argument x, that is a status of a process,
      94     as returned by waitpid() or, equivalently, _cwait() or GetExitCodeProcess().
      95     This value is simply an 'int', not composed of bit fields.  */
      96  
      97  /* When an unhandled fatal signal terminates a process, the exit code is 3.  */
      98  # define WIFSIGNALED(x) ((x) == 3)
      99  # define WIFEXITED(x) ((x) != 3)
     100  # define WIFSTOPPED(x) 0
     101  
     102  /* The signal that terminated a process is not known posthum.  */
     103  # define WTERMSIG(x) SIGTERM
     104  
     105  # define WEXITSTATUS(x) (x)
     106  
     107  /* There are no stopping signals.  */
     108  # define WSTOPSIG(x) 0
     109  
     110  /* There are no core dumps.  */
     111  # define WCOREDUMP(x) 0
     112  
     113  #endif
     114  
     115  
     116  /* Declarations of functions.  */
     117  
     118  #if @GNULIB_WAITPID@
     119  # if defined _WIN32 && ! defined __CYGWIN__
     120  _GL_FUNCDECL_SYS (waitpid, pid_t, (pid_t pid, int *statusp, int options));
     121  # endif
     122  /* Need to cast, because on Cygwin, the second parameter is
     123                                                  __wait_status_ptr_t statusp.  */
     124  _GL_CXXALIAS_SYS_CAST (waitpid, pid_t, (pid_t pid, int *statusp, int options));
     125  _GL_CXXALIASWARN (waitpid);
     126  #elif defined GNULIB_POSIXCHECK
     127  # undef waitpid
     128  # if HAVE_RAW_DECL_WAITPID
     129  _GL_WARN_ON_USE (waitpid, "waitpid is unportable - "
     130                   "use gnulib module sys_wait for portability");
     131  # endif
     132  #endif
     133  
     134  
     135  #endif /* _@GUARD_PREFIX@_SYS_WAIT_H */
     136  #endif /* _@GUARD_PREFIX@_SYS_WAIT_H */