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sys/wait: add WTERMSIG implementation
Update the WTERMSIG() macro to extract the signal number from the wait status, changing from constant 'false' to '(((s) >> 8) & 0x7f)' to match POSIX semantics for processes terminated by signals. Signed-off-by: guoshichao <guoshichao@xiaomi.com>
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@@ -46,11 +46,11 @@
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#define WEXITSTATUS(s) (((s) >> 8) & 0xff) /* Return exit status */
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#define WIFEXITED(s) (((s) & 0xff) == 0) /* True: Child exited normally */
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#define WIFCONTINUED(s) (false) /* True: Child has been continued */
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#define WIFSIGNALED(s) (false) /* True: Child exited due to uncaught signal */
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#define WIFSTOPPED(s) (false) /* True: Child is currently stopped */
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#define WSTOPSIG(s) (false) /* Return signal number that caused process to stop */
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#define WTERMSIG(s) (false) /* Return signal number that caused process to terminate */
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#define WIFCONTINUED(s) (false) /* True: Child has been continued */
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#define WIFSIGNALED(s) (false) /* True: Child exited due to uncaught signal */
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#define WIFSTOPPED(s) (false) /* True: Child is currently stopped */
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#define WSTOPSIG(s) (false) /* Return signal number that caused process to stop */
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#define WTERMSIG(s) (((s) >> 8) & 0x7f) /* Return signal number that caused process to terminate */
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/* The following symbolic constants are possible values for the options
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* argument to waitpid() (1) and/or waitid() (2),
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