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Diffstat (limited to 'StdLib/Include/sys/wait.h')
| -rw-r--r-- | StdLib/Include/sys/wait.h | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/StdLib/Include/sys/wait.h b/StdLib/Include/sys/wait.h new file mode 100644 index 0000000000..64200aa999 --- /dev/null +++ b/StdLib/Include/sys/wait.h @@ -0,0 +1,170 @@ +/* $NetBSD: wait.h,v 1.24 2005/12/11 12:25:21 christos Exp $ */
+
+/*
+ * Copyright (c) 1982, 1986, 1989, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * @(#)wait.h 8.2 (Berkeley) 7/10/94
+ */
+#ifndef _SYS_WAIT_H_
+#define _SYS_WAIT_H_
+
+#include <sys/featuretest.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).
+ */
+
+/*
+ * Macros to test the exit status returned by wait
+ * and extract the relevant values.
+ */
+#define _W_INT(w) (*(int *)(void *)&(w)) /* convert union wait to int */
+
+#define _WSTATUS(x) (_W_INT(x) & 0177)
+#define _WSTOPPED 0177 /* _WSTATUS if process is stopped */
+#define WIFSTOPPED(x) (_WSTATUS(x) == _WSTOPPED)
+#define WSTOPSIG(x) ((int)(((unsigned int)_W_INT(x)) >> 8) & 0xff)
+#define WIFSIGNALED(x) (_WSTATUS(x) != _WSTOPPED && _WSTATUS(x) != 0)
+#define WTERMSIG(x) (_WSTATUS(x))
+#define WIFEXITED(x) (_WSTATUS(x) == 0)
+#define WEXITSTATUS(x) ((int)(((unsigned int)_W_INT(x)) >> 8) & 0xff)
+#define WCOREFLAG 0200
+#define WCOREDUMP(x) (_W_INT(x) & WCOREFLAG)
+
+#define W_EXITCODE(ret, sig) ((ret) << 8 | (sig))
+#define W_STOPCODE(sig) ((sig) << 8 | _WSTOPPED)
+
+/*
+ * 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 /* don't hang in wait */
+#define WUNTRACED 0x00000002 /* tell about stopped,
+ untraced children */
+#if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
+#define WALTSIG 0x00000004 /* wait for processes that exit
+ with an alternate signal (i.e.
+ not SIGCHLD) */
+#define WALLSIG 0x00000008 /* wait for processes that exit
+ with any signal, i.e. SIGCHLD
+ and alternates */
+
+/*
+ * These are the Linux names of some of the above flags, for compatibility
+ * with Linux's clone(2) API.
+ */
+#define __WCLONE WALTSIG
+#define __WALL WALLSIG
+
+/*
+ * These bits are used in order to support SVR4 (etc) functionality
+ * without replicating sys_wait4 5 times.
+ */
+#define WNOWAIT 0x00010000 /* Don't mark child 'P_WAITED' */
+#define WNOZOMBIE 0x00020000 /* Ignore zombies */
+#endif /* _XOPEN_SOURCE || _NETBSD_SOURCE */
+
+/* POSIX extensions and 4.2/4.3 compatibility: */
+
+/*
+ * 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 */
+
+/*
+ * 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 BYTE_ORDER == 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 BYTE_ORDER == 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 BYTE_ORDER == 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 BYTE_ORDER == 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
+
+#define WSTOPPED _WSTOPPED
+
+__BEGIN_DECLS
+pid_t wait(int *);
+
+#if 0 /* Normally declared here but not implemented for UEFI. */
+struct rusage; /* forward declaration */
+
+pid_t waitpid(pid_t, int *, int);
+pid_t wait3(int *, int, struct rusage *);
+pid_t wait4(pid_t, int *, int, struct rusage *);
+#endif
+__END_DECLS
+
+#endif /* !_SYS_WAIT_H_ */
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