Changeset 1627 for trunk/src/emx/include/sys/wait.h

Timestamp:

Nov 8, 2004, 10:57:37 AM (21 years ago)

Author:

bird

Message:

Having a go at waitid (and waitpid()/wait()).

File:

• trunk/src/emx/include/sys/wait.h (modified) (1 diff, 1 prop)

trunk/src/emx/include/sys/wait.h

@@ -1 @@
-/* sys/wait.h (emx+gcc) */
+/*-
+ * 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.
+ * 4. 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
+ * $FreeBSD: src/sys/sys/wait.h,v 1.20 2004/04/09 13:14:32 bde Exp $
+ */
 
-#ifndef _SYS_WAIT_H
-#define _SYS_WAIT_H
+#ifndef _SYS_WAIT_H_
+#define _SYS_WAIT_H_
 
-#if defined (__cplusplus)
-extern "C" {
+#include <sys/cdefs.h>
+
+/*
+ * This file holds definitions relevant 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.
+ */
+#if __BSD_VISIBLE
+#define _W_INT(w)       (*(int *)&(w))  /* Convert union wait to int. */
+#define WCOREFLAG       0200
+#else
+#define _W_INT(i)       (i)
 #endif
 
-#define WNOHANG         1
-#define WUNTRACED       2
+#define _WSTATUS(x)     (_W_INT(x) & 0177)
+#define _WSTOPPED       0177            /* _WSTATUS if process is stopped */
+#define WIFSTOPPED(x)   (_WSTATUS(x) == _WSTOPPED)
+#define WSTOPSIG(x)     (_W_INT(x) >> 8)
+#define WIFSIGNALED(x)  (_WSTATUS(x) != _WSTOPPED && _WSTATUS(x) != 0)
+#define WTERMSIG(x)     (_WSTATUS(x))
+#define WIFEXITED(x)    (_WSTATUS(x) == 0)
+#define WEXITSTATUS(x)  (_W_INT(x) >> 8)
+#define WIFCONTINUED(x) (x == 0x13)     /* 0x13 == SIGCONT */
+#if __BSD_VISIBLE
+#define WCOREDUMP(x)    (_W_INT(x) & WCOREFLAG)
 
-#define WIFEXITED(st)   (((st) & 0x7f) == 0)
-#define WIFSIGNALED(st) (((st) & 0x7f) != 0x7f && ((st) & 0x7f) != 0)
-#define WIFSTOPPED(st)  (((st) & 0x7f) == 0x7f)
-
-#define WEXITSTATUS(st) ((st) >> 8)
-#define WTERMSIG(st)    ((st) & 0x7f)
-#define WSTOPSIG(st)    ((st) >> 8)
-
-int wait (int *);
-int waitpid (int, int *, int);
-
-#if !defined (_POSIX_SOURCE) || defined (_WITH_UNDERSCORE) || defined(__USE_EMX)
-
-int _wait (int *);
-int _waitpid (int, int *, int);
-
+#define W_EXITCODE(ret, sig)    ((ret) << 8 | (sig))
+#define W_STOPCODE(sig)         ((sig) << 8 | _WSTOPPED)
 #endif
 
-#if defined (__cplusplus)
-}
+/*
+ * 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         1       /* Don't hang in wait. */
+#define WUNTRACED       2       /* Tell about stopped, untraced children. */
+#define WCONTINUED      4       /* Report a job control continued process. */
+
+#if 0 /* bird: old __BSD_VISIBLE */
+#define WLINUXCLONE 0x80000000  /* Wait for kthread spawned from linux_clone. */
 #endif
 
-#endif /* not SYS_WAIT_H */
+/*
+ * Tokens for special values of the "pid" parameter to wait4.
+ */
+#if __BSD_VISIBLE
+#define WAIT_ANY        (-1)    /* any process */
+#define WAIT_MYPGRP     0       /* any process in my process group */
+#endif /* __BSD_VISIBLE */
+
+#ifdef _KERNEL
+struct rusage;
+int     kern_wait(struct thread *td, pid_t pid, int *status, int options,
+            struct rusage *rup);
+#else /* !_KERNEL */
+#include <sys/types.h>
+
+__BEGIN_DECLS
+pid_t   wait(int *);
+pid_t   waitpid(pid_t, int *, int);
+#if 0 /* bird: old __BSD_VISIBLE */
+struct rusage;
+pid_t   wait3(int *, int, struct rusage *);
+pid_t   wait4(pid_t, int *, int, struct rusage *);
+#endif
+
+
+/*
+ * bird: LIBC additions - start.
+ */
+#if __XSI_VISIBLE
+#include <signal.h>
+
+/** Wait for processes that have exited. */
+#define WEXITED         8
+/** Wait for processes that have stopped. */
+#define WSTOPPED       16
+/** Keep the wait state around for later wait calls, i.e. just peek at the stuff. */
+#define WNOWAIT        32
+
+/* The following values are used by the `waitid' function.  */
+typedef enum
+{
+    /** Wait for any child process. */
+    P_ALL,
+    /** Wait for a specific process. */
+    P_PID,
+    /** Wait for processes of a process group. */
+    P_PGID
+} idtype_t;
+
+int     waitid(idtype_t, id_t, siginfo_t *, int);
+#endif /* __XSI_VISIBLE */
+
+/*
+ * bird: LIBC additions - end.
+ */
+
+__END_DECLS
+#endif /* _KERNEL */
+
+#endif /* !_SYS_WAIT_H_ */