ksh_wait.h

一个开放源代码的 AT&T 的 Korn Shell 的复制品, 支持大多数 ksh89 的特性。

/* Wrapper around the ugly sys/wait includes/ifdefs */
/* $Id$ */

#ifdef HAVE_SYS_WAIT_H
# include <sys/wait.h>
#endif

#ifndef POSIX_SYS_WAIT
/* Get rid of system macros (which probably use union wait) */
# undef WIFCORED
# undef WIFEXITED
# undef WEXITSTATUS
# undef WIFSIGNALED
# undef WTERMSIG
# undef WIFSTOPPED
# undef WSTOPSIG
#endif /* POSIX_SYS_WAIT */

typedef int WAIT_T;

#ifndef WIFCORED
# define WIFCORED(s)	((s) & 0x80)
#endif
#define WSTATUS(s)	(s)

#ifndef WIFEXITED
# define WIFEXITED(s)	(((s) & 0xff) == 0)
#endif
#ifndef WEXITSTATUS
# define WEXITSTATUS(s)	(((s) >> 8) & 0xff)
#endif
#ifndef WIFSIGNALED
# define WIFSIGNALED(s)	(((s) & 0xff) != 0 && ((s) & 0xff) != 0x7f)
#endif
#ifndef WTERMSIG
# define WTERMSIG(s)	((s) & 0x7f)
#endif
#ifndef WIFSTOPPED
# define WIFSTOPPED(s)	(((s) & 0xff) == 0x7f)
#endif
#ifndef WSTOPSIG
# define WSTOPSIG(s)	(((s) >> 8) & 0xff)
#endif

#if !defined(HAVE_WAITPID) && defined(HAVE_WAIT3)
  /* always used with p == -1 */
# define ksh_waitpid(p, s, o)	wait3((s), (o), (struct rusage *) 0)
#else /* !HAVE_WAITPID && HAVE_WAIT3 */
# define ksh_waitpid(p, s, o)	waitpid((p), (s), (o))
#endif /* !HAVE_WAITPID && HAVE_WAIT3 */