Cider Isn't Darwin Emulation, Really
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#include <sys/cdefs.h>#include <sys/_types.h>
/* * This file holds definitions relevent to the wait4 system call * and the alternate interfaces that use it (wait, wait3, waitpid). */
/* * [XSI] The type idtype_t shall be defined as an enumeration type whose * possible values shall include at least P_ALL, P_PID, and P_PGID. */typedef enum { P_ALL, P_PID, P_PGID} idtype_t;
/* * [XSI] The id_t and pid_t types shall be defined as described * in <sys/types.h> */#ifndef _PID_Ttypedef __darwin_pid_t pid_t;#define _PID_T#endif
#ifndef _ID_Ttypedef __darwin_id_t id_t;#define _ID_T#endif
/* * [XSI] The siginfo_t type shall be defined as described in <signal.h> * [XSI] The rusage structure shall be defined as described in <sys/resource.h> * [XSI] Inclusion of the <sys/wait.h> header may also make visible all * symbols from <signal.h> and <sys/resource.h> * * NOTE: This requirement is currently being satisfied by the direct * inclusion of <sys/signal.h> and <sys/resource.h>, below. * * Software should not depend on the exposure of anything other * than the types siginfo_t and struct rusage as a result of * this inclusion. If you depend on any types or manifest * values othe than siginfo_t and struct rusage from either of * those files, you should explicitly include them yourself, as * well, or in future releases your stware may not compile * without modification. */#include <sys/signal.h> /* [XSI] for siginfo_t */#include <sys/resource.h> /* [XSI] for struct rusage */
/* * Option bits for the third argument of wait4. WNOHANG causes the * wait to not hang if there are no stopped or terminated processes, rather * returning an error indication in this case (pid==0). WUNTRACED * indicates that the caller should receive status about untraced children * which stop due to signals. If children are stopped and a wait without * this option is done, it is as though they were still running... nothing * about them is returned. */#define WNOHANG 0x00000001 /* [XSI] no hang in wait/no child to reap */#define WUNTRACED 0x00000002 /* [XSI] notify on stop, untraced child */
/* * Macros to test the exit status returned by wait * and extract the relevant values. */#if defined(_POSIX_C_SOURCE) && !defined(_DARWIN_C_SOURCE)#define _W_INT(i) (i)#else#define _W_INT(w) (*(int *)&(w)) /* convert union wait to int */#define WCOREFLAG 0200#endif /* (_POSIX_C_SOURCE && !_DARWIN_C_SOURCE) */
/* These macros are permited, as they are in the implementation namespace */#define _WSTATUS(x) (_W_INT(x) & 0177)#define _WSTOPPED 0177 /* _WSTATUS if process is stopped */
/* * [XSI] The <sys/wait.h> header shall define the following macros for * analysis of process status values */#if __DARWIN_UNIX03#define WEXITSTATUS(x) ((_W_INT(x) >> 8) & 0x000000ff)#else /* !__DARWIN_UNIX03 */#define WEXITSTATUS(x) (_W_INT(x) >> 8)#endif /* !__DARWIN_UNIX03 *//* 0x13 == SIGCONT */#define WSTOPSIG(x) (_W_INT(x) >> 8)#define WIFCONTINUED(x) (_WSTATUS(x) == _WSTOPPED && WSTOPSIG(x) == 0x13)#define WIFSTOPPED(x) (_WSTATUS(x) == _WSTOPPED && WSTOPSIG(x) != 0x13)#define WIFEXITED(x) (_WSTATUS(x) == 0)#define WIFSIGNALED(x) (_WSTATUS(x) != _WSTOPPED && _WSTATUS(x) != 0)#define WTERMSIG(x) (_WSTATUS(x))#if (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE))#define WCOREDUMP(x) (_W_INT(x) & WCOREFLAG)
#define W_EXITCODE(ret, sig) ((ret) << 8 | (sig))#define W_STOPCODE(sig) ((sig) << 8 | _WSTOPPED)#endif /* (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)) */
/* * [XSI] The following symbolic constants shall be defined as possible * values for the fourth argument to waitid(). *//* WNOHANG already defined for wait4() *//* WUNTRACED defined for wait4() but not for waitid() */#define WEXITED 0x00000004 /* [XSI] Processes which have exitted */#if __DARWIN_UNIX03/* waitid() parameter */#define WSTOPPED 0x00000008 /* [XSI] Any child stopped by signal */#endif#define WCONTINUED 0x00000010 /* [XSI] Any child stopped then continued */#define WNOWAIT 0x00000020 /* [XSI] Leave process returned waitable */
#if (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE))/* POSIX extensions and 4.2/4.3 compatability: */
/* * Tokens for special values of the "pid" parameter to wait4. */#define WAIT_ANY (-1) /* any process */#define WAIT_MYPGRP 0 /* any process in my process group */
#include <machine/endian.h>
/* * Deprecated: * Structure of the information in the status word returned by wait4. * If w_stopval==_WSTOPPED, then the second structure describes * the information returned, else the first. */union wait { int w_status; /* used in syscall */ /* * Terminated process status. */ struct {#if __DARWIN_BYTE_ORDER == __DARWIN_LITTLE_ENDIAN unsigned int w_Termsig:7, /* termination signal */ w_Coredump:1, /* core dump indicator */ w_Retcode:8, /* exit code if w_termsig==0 */ w_Filler:16; /* upper bits filler */#endif#if __DARWIN_BYTE_ORDER == __DARWIN_BIG_ENDIAN unsigned int w_Filler:16, /* upper bits filler */ w_Retcode:8, /* exit code if w_termsig==0 */ w_Coredump:1, /* core dump indicator */ w_Termsig:7; /* termination signal */#endif } w_T; /* * Stopped process status. Returned * only for traced children unless requested * with the WUNTRACED option bit. */ struct {#if __DARWIN_BYTE_ORDER == __DARWIN_LITTLE_ENDIAN unsigned int w_Stopval:8, /* == W_STOPPED if stopped */ w_Stopsig:8, /* signal that stopped us */ w_Filler:16; /* upper bits filler */#endif#if __DARWIN_BYTE_ORDER == __DARWIN_BIG_ENDIAN unsigned int w_Filler:16, /* upper bits filler */ w_Stopsig:8, /* signal that stopped us */ w_Stopval:8; /* == W_STOPPED if stopped */#endif } w_S;};#define w_termsig w_T.w_Termsig#define w_coredump w_T.w_Coredump#define w_retcode w_T.w_Retcode#define w_stopval w_S.w_Stopval#define w_stopsig w_S.w_Stopsig
#endif /* (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)) */
#if !(__DARWIN_UNIX03 - 0)/* * Stopped state value; cannot use waitid() parameter of the same name * in the same scope */#define WSTOPPED _WSTOPPED#endif /* !__DARWIN_UNIX03 */
#ifndef KERNEL__BEGIN_DECLSpid_t wait(int *) __DARWIN_ALIAS_C(wait);pid_t waitpid(pid_t, int *, int) __DARWIN_ALIAS_C(waitpid);#ifndef _ANSI_SOURCEint waitid(idtype_t, id_t, siginfo_t *, int) __DARWIN_ALIAS_C(waitid);#endif /* !_ANSI_SOURCE */#if (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE))pid_t wait3(int *, int, struct rusage *);pid_t wait4(pid_t, int *, int, struct rusage *);#endif /* (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)) */__END_DECLS#endif#endif /* !_SYS_WAIT_H_ */