wait.h

linux0.02源代码用于研究linux操作系统

#ifndef _SYS_WAIT_H
#define _SYS_WAIT_H

#include <sys/types.h>

#define _LOW(v)		( (v) & 0377)
#define _HIGH(v)	( ((v) >> 8) & 0377)

/* options for waitpid, WUNTRACED not supported */
#define WNOHANG		1
#define WUNTRACED	2

#define WIFEXITED(s)	(!((s)&0xFF))
#define WIFSTOPPED(s)	(((s)&0xFF)==0x7F)
#define WEXITSTATUS(s)	(((s)>>8)&0xFF)
#define WTERMSIG(s)	((s)&0x7F)
#define WCOREDUMP(s)	((s)&0x80)
#define WSTOPSIG(s)	(((s)>>8)&0xFF)
#define WIFSIGNALED(s)	(((unsigned int)(s)-1 & 0xFFFF) < 0xFF)

pid_t wait(int *stat_loc);
pid_t waitpid(pid_t pid, int *stat_loc, int options);

#endif