| 1 | /*
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| 2 | * shared_wait.h - Shared macros used by the wait() syscall.
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| 3 | *
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| 4 | * Author Alain Greiner (2016,2017,2018)
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| 5 | *
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| 6 | * Copyright (c) UPMC Sorbonne Universites
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| 7 | *
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| 8 | * This file is part of ALMOS-MKH.
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| 9 | *
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| 10 | * ALMOS-MKH is free software; you can redistribute it and/or modify it
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| 11 | * under the terms of the GNU General Public License as published by
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| 12 | * the Free Software Foundation; version 2.0 of the License.
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| 13 | *
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| 14 | * ALMOS-MKH is distributed in the hope that it will be useful, but
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| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 17 | * General Public License for more details.
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| 18 | *
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| 19 | * You should have received a copy of the GNU General Public License
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| 20 | * along with ALMOS-MKH; if not, write to the Free Software Foundation,
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| 21 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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| 22 | */
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| 23 |
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| 24 | #ifndef _SHARED_WAIT_H_
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| 25 | #define _SHARED_WAIT_H_
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| 26 |
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| 27 | /*********************************************************************************************
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| 28 | * These macros can be used by the parent process to analyze a child process termination
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| 29 | * status, as returned by the wait() syscall.
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| 30 | * The termination state is a 32 bits word:
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| 31 | * - the 8 LSB bits contain the user defined exit status
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| 32 | * - the 24 other bits contain the flags defined below
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| 33 | ********************************************************************************************/
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| 34 |
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| 35 | #define PROCESS_TERM_STOP 0x100 /*! process received a SIGSTOP signal */
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| 36 | #define PROCESS_TERM_KILL 0x200 /*! process killed by a SIGKILL signal */
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| 37 | #define PROCESS_TERM_EXIT 0x400 /*! process terminated by a sys_exit() */
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| 38 | #define PROCESS_TERM_WAIT 0x800 /*! parent process executed a sys_wait() */
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| 39 |
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| 40 | #define WIFEXITED( status ) (status & PROCESS_TERM_EXIT)
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| 41 | #define WIFSIGNALED( status ) (status & PROCESS_TERM_KILL)
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| 42 | #define WIFSTOPPED( status ) (status & PROCESS_TERM_STOP)
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| 43 | #define WEXITSTATUS( status ) (status & 0xFF)
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| 44 |
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| 45 | #define WNOHANG -1 // TODO Not implemented in almos-mkh
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| 46 |
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| 47 | #endif
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| 48 |
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