Date: Sun, 2 Jun 2002 01:01:08 -0400 From: Mike Barcroft <mike@FreeBSD.org> To: arch@FreeBSD.org Subject: Removing wait union Message-ID: <20020602010108.B16166@espresso.q9media.com>
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Does anyone have any objections to removing the deprecated 4.2/4.3BSD
wait union in <sys/wait.h>? It's been deprecating since Rev 1.1 and
there are only a few consumers in the base system. Attached are two
patches, one to removing it from <sys/wait.h> and the other to remove
its consumers. Changes to lpd(8) sent directly to its maintainer.
Best regards,
Mike Barcroft
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Remove the deprecated 4.2/4.3BSD wait union.
Index: wait.h
===================================================================
RCS file: /work/repo/src/sys/sys/wait.h,v
retrieving revision 1.16
diff -u -r1.16 wait.h
--- wait.h 1 Jun 2002 21:07:10 -0000 1.16
+++ wait.h 2 Jun 2002 04:43:35 -0000
@@ -37,6 +37,8 @@
#ifndef _SYS_WAIT_H_
#define _SYS_WAIT_H_
+#include <sys/cdefs.h>
+
/*
* This file holds definitions relevant to the wait4 system call and the
* alternate interfaces that use it (wait, wait3, waitpid).
@@ -86,71 +88,16 @@
#define WLINUXCLONE 0x80000000 /* Wait for kthread spawned from linux_clone. */
#endif
-#if __BSD_VISIBLE
-/* POSIX extensions and 4.2/4.3 compatibility: */
-
/*
* 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 */
-
-#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 _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
#endif /* __BSD_VISIBLE */
#ifndef _KERNEL
#include <sys/types.h>
-#include <sys/cdefs.h>
__BEGIN_DECLS
struct rusage; /* forward declaration */
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Use POSIX macros for wait(2)-style status information instead of the
deprecated 4.2/4.3BSD wait union. Fix some nearby pid_t/int
confusion.
Index: games/cribbage/instr.c
===================================================================
RCS file: /work/repo/src/games/cribbage/instr.c,v
retrieving revision 1.5
diff -u -r1.5 instr.c
--- games/cribbage/instr.c 12 Dec 1999 03:04:15 -0000 1.5
+++ games/cribbage/instr.c 2 Jun 2002 04:46:42 -0000
@@ -58,8 +58,8 @@
instructions()
{
struct stat sb;
- union wait pstat;
pid_t pid;
+ int pstat;
char *pager, *path;
if (stat(_PATH_INSTR, &sb)) {
@@ -84,7 +84,7 @@
do {
pid = waitpid(pid, (int *)&pstat, 0);
} while (pid == -1 && errno == EINTR);
- if (pid == -1 || pstat.w_status)
+ if (pid == -1 || WEXITSTATUS(pstat) || WTERMSIG(pstat))
exit(1);
}
}
Index: games/sail/pl_1.c
===================================================================
RCS file: /work/repo/src/games/sail/pl_1.c,v
retrieving revision 1.2
diff -u -r1.2 pl_1.c
--- games/sail/pl_1.c 30 Nov 1999 03:49:36 -0000 1.2
+++ games/sail/pl_1.c 2 Jun 2002 04:47:55 -0000
@@ -126,8 +126,8 @@
void
child()
{
- union wait status;
- int pid;
+ pid_t pid;
+ int status;
(void) signal(SIGCHLD, SIG_IGN);
do {
Index: gnu/lib/libdialog/raw_popen.c
===================================================================
RCS file: /work/repo/src/gnu/lib/libdialog/raw_popen.c,v
retrieving revision 1.3
diff -u -r1.3 raw_popen.c
--- gnu/lib/libdialog/raw_popen.c 9 Jul 2001 09:23:38 -0000 1.3
+++ gnu/lib/libdialog/raw_popen.c 2 Jun 2002 01:03:41 -0000
@@ -131,8 +131,7 @@
raw_pclose(FILE *iop)
{
register struct pid *cur, *last;
- int omask;
- union wait pstat;
+ int omask, pstat;
pid_t pid;
(void)fclose(iop);
@@ -158,5 +157,5 @@
last->next = cur->next;
free(cur);
- return (pid == -1 ? -1 : pstat.w_status);
+ return (pid == -1 ? -1 : pstat);
}
Index: usr.bin/rlogin/rlogin.c
===================================================================
RCS file: /work/repo/src/usr.bin/rlogin/rlogin.c,v
retrieving revision 1.32
diff -u -r1.32 rlogin.c
--- usr.bin/rlogin/rlogin.c 8 May 2002 00:46:30 -0000 1.32
+++ usr.bin/rlogin/rlogin.c 2 Jun 2002 04:50:45 -0000
@@ -468,16 +468,16 @@
void
catch_child(int signo __unused)
{
- union wait status;
- int pid;
+ pid_t pid;
+ int status;
for (;;) {
- pid = wait3((int *)&status, WNOHANG|WUNTRACED, NULL);
+ pid = wait3(&status, WNOHANG|WUNTRACED, NULL);
if (pid == 0)
return;
/* if the child (reader) dies, just quit */
if (pid < 0 || (pid == child && !WIFSTOPPED(status)))
- done((int)(status.w_termsig | status.w_retcode));
+ done(WTERMSIG(status) | WEXITSTATUS(status));
}
/* NOTREACHED */
}
Index: usr.bin/script/script.c
===================================================================
RCS file: /work/repo/src/usr.bin/script/script.c,v
retrieving revision 1.18
diff -u -r1.18 script.c
--- usr.bin/script/script.c 22 Mar 2002 01:42:27 -0000 1.18
+++ usr.bin/script/script.c 2 Jun 2002 02:30:34 -0000
@@ -209,11 +209,11 @@
void
finish()
{
- int die, e, pid;
- union wait status;
+ pid_t pid;
+ int die, e, status;
die = e = 0;
- while ((pid = wait3((int *)&status, WNOHANG, 0)) > 0)
+ while ((pid = wait3(&status, WNOHANG, 0)) > 0)
if (pid == child) {
die = 1;
if (WIFEXITED(status))
Index: usr.bin/window/wwchild.c
===================================================================
RCS file: /work/repo/src/usr.bin/window/wwchild.c,v
retrieving revision 1.4
diff -u -r1.4 wwchild.c
--- usr.bin/window/wwchild.c 17 May 2001 09:38:48 -0000 1.4
+++ usr.bin/window/wwchild.c 2 Jun 2002 04:51:38 -0000
@@ -48,10 +48,9 @@
void
wwchild()
{
- int olderrno;
register struct ww **wp;
- union wait w;
- int pid;
+ pid_t pid;
+ int olderrno, w;
char collected = 0;
olderrno = errno;
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