waitstatus.h (2287B) - Raw
1 /* Definitions of status bits for `wait' et al. 2 Copyright (C) 1992-2025 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 The GNU C Library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library; if not, see 17 <https://www.gnu.org/licenses/>. */ 18 19 #if !defined _SYS_WAIT_H && !defined _STDLIB_H 20 # error "Never include <bits/waitstatus.h> directly; use <sys/wait.h> instead." 21 #endif 22 23 24 /* Everything extant so far uses these same bits. */ 25 26 27 /* If WIFEXITED(STATUS), the low-order 8 bits of the status. */ 28 #define __WEXITSTATUS(status) (((status) & 0xff00) >> 8) 29 30 /* If WIFSIGNALED(STATUS), the terminating signal. */ 31 #define __WTERMSIG(status) ((status) & 0x7f) 32 33 /* If WIFSTOPPED(STATUS), the signal that stopped the child. */ 34 #define __WSTOPSIG(status) __WEXITSTATUS(status) 35 36 /* Nonzero if STATUS indicates normal termination. */ 37 #define __WIFEXITED(status) (__WTERMSIG(status) == 0) 38 39 /* Nonzero if STATUS indicates termination by a signal. */ 40 #define __WIFSIGNALED(status) \ 41 (((signed char) (((status) & 0x7f) + 1) >> 1) > 0) 42 43 /* Nonzero if STATUS indicates the child is stopped. */ 44 #define __WIFSTOPPED(status) (((status) & 0xff) == 0x7f) 45 46 /* Nonzero if STATUS indicates the child continued after a stop. We only 47 define this if <bits/waitflags.h> provides the WCONTINUED flag bit. */ 48 #ifdef WCONTINUED 49 # define __WIFCONTINUED(status) ((status) == __W_CONTINUED) 50 #endif 51 52 /* Nonzero if STATUS indicates the child dumped core. */ 53 #define __WCOREDUMP(status) ((status) & __WCOREFLAG) 54 55 /* Macros for constructing status values. */ 56 #define __W_EXITCODE(ret, sig) ((ret) << 8 | (sig)) 57 #define __W_STOPCODE(sig) ((sig) << 8 | 0x7f) 58 #define __W_CONTINUED 0xffff 59 #define __WCOREFLAG 0x80