src/syswait.h

   1 /* Define wait system call interface for Emacs.
   2    Copyright (C) 1993-1995, 2000-2017 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Emacs.
   5
   6 GNU Emacs is free software: you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation, either version 3 of the License, or (at
   9 your option) any later version.
  10
  11 GNU Emacs is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.  */
  18
  19 /* Define the structure that the wait system call stores.
  20    On many systems, there is a structure defined for this.
  21    But on vanilla-ish USG systems there is not.  */
  22
  23 #ifndef EMACS_SYSWAIT_H
  24 #define EMACS_SYSWAIT_H
  25
  26 #include <sys/types.h>
  27
  28 #ifdef HAVE_SYS_WAIT_H  /* We have sys/wait.h with POSIXish definitions.  */
  29 #include <sys/wait.h>
  30 #endif  /* !HAVE_SYS_WAIT_H */
  31
  32 #ifndef WCONTINUED
  33 #define WCONTINUED 8
  34 #endif
  35
  36 #ifndef WCOREDUMP               /* not POSIX */
  37 #define WCOREDUMP(status) ((status) & 0x80)
  38 #endif
  39 #ifndef WEXITSTATUS
  40 #define WEXITSTATUS(status) (((status)  & 0xff00) >> 8)
  41 #endif
  42 #ifndef WIFEXITED
  43 #define WIFEXITED(status) (WTERMSIG(status) == 0)
  44 #endif
  45 #ifndef WIFSTOPPED
  46 #define WIFSTOPPED(status) (((status) & 0xff) == 0x7f)
  47 #endif
  48 #ifndef WIFSIGNALED
  49 #define WIFSIGNALED(status) (!WIFSTOPPED(status) && !WIFEXITED(status))
  50 #endif
  51 #ifndef WSTOPSIG
  52 #define WSTOPSIG(status) WEXITSTATUS(status)
  53 #endif
  54 #ifndef WTERMSIG
  55 #define WTERMSIG(status) ((status) & 0x7f)
  56 #endif
  57
  58 /* Defined in sysdep.c.  */
  59 extern bool wait_for_termination (pid_t, int *, bool);
  60 extern pid_t child_status_changed (pid_t, int *, int);
  61
  62 #endif /* EMACS_SYSWAIT_H */