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49 lines
1.7 KiB
C
49 lines
1.7 KiB
C
#ifndef __SYS_WAIT_H__
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# define __SYS_WAIT_H__
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#include <stddef.h>
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#include <stdint.h>
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#include <sys/types.h>
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/*
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** This will define the `W*' macros for the flag bits to `waitpid', `wait3',
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** and `wait4'.
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*/
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#include <bits/waitflags.h>
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/* This will define all the `__W*' macros.*/
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#include <bits/waitstatus.h>
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/* Macros for the `waitpid`'s wstatus argument. */
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#define WEXITSTATUS(status) __WEXITSTATUS(status)
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#define WTERMSIG(status) __WTERMSIG(status)
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#define WSTOPSIG(status) __WSTOPSIG(status)
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#define WIFEXITED(status) __WIFEXITED(status)
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#define WIFSIGNALED(status) __WIFSIGNALED(status)
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#define WIFSTOPPED(status) __WIFSTOPPED(status)
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#define WIFCONTINUED(status) __WIFCONTINUED(status)
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#define WCOREDUMP(status) __WCOREDUMP(status)
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/*
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** Wait for a child matching PID to die.
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** - If PID is greater than 0, match any process whose process ID is PID.
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** - If PID is (pid_t) -1, match any process.
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** - If PID is (pid_t) 0, match any process with the same process group as the
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** current process.
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** - If PID is less than -1, match any process whose process group is the absolute
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** value of PID.
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** - If the WNOHANG bit is set in OPTIONS, and that child is not already dead,
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** return (pid_t) 0. If successful, return PID and store the dead child's
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** status in STAT_LOC.
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** - Return (pid_t) -1 for errors. If the WUNTRACED bit is set in OPTIONS,
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** return status for stopped children; otherwise don't.
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*/
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extern pid_t waitpid(pid_t pid, int *wstatus, int options);
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/*
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** Wait for a child to die. When one does, put its status in *STAT_LOC
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** and return its process ID. For errors, return (pid_t) -1.
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*/
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extern pid_t wait(int *wstatus);
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#endif /*__SYS_WAIT_H__*/
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