Reduce the size of the interposing table and amount of

cancellation-handling code in the libthr.  Translate some syscalls
into their more generic counterpart, and remove translated syscalls
from the table.

List of the affected syscalls:
creat, open -> openat
raise -> thr_kill
sleep, usleep -> nanosleep
pause -> sigsuspend
wait, wait3, waitpid -> wait4

Suggested and reviewed by:	jilles (previous version)
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week

16 files changed, 49 insertions, 302 deletions

diff --git a/lib/libc/compat-43/Symbol.map b/lib/libc/compat-43/Symbol.map
index 2827705443a8..bd49f99e2df6 100644
--- a/lib/libc/compat-43/Symbol.map
+++ b/lib/libc/compat-43/Symbol.map
@@ -28,5 +28,4 @@ FBSD_1.2 {
 FBSDprivate_1.0 {
 	__creat;
 	_creat;
-	__libc_creat;
 };
diff --git a/lib/libc/compat-43/creat.c b/lib/libc/compat-43/creat.c
index 5ee4531be29c..45454824ba6b 100644
--- a/lib/libc/compat-43/creat.c
+++ b/lib/libc/compat-43/creat.c
@@ -38,21 +38,16 @@ __FBSDID("$FreeBSD$");
 #include "un-namespace.h"
 #include "libc_private.h"
 
-__weak_reference(__libc_creat, __creat);
-__weak_reference(__libc_creat, _creat);
+__weak_reference(__creat, creat);
+__weak_reference(__creat, _creat);
 
 #pragma weak creat
 int
-creat(const char *path, mode_t mode)
+__creat(const char *path, mode_t mode)
 {
 
-	return (((int (*)(const char *, mode_t))
-	    __libc_interposing[INTERPOS_creat])(path, mode));
+	return (((int (*)(int, const char *, int, ...))
+	    __libc_interposing[INTERPOS_openat])(AT_FDCWD, path, O_WRONLY |
+	    O_CREAT | O_TRUNC, mode));
 }
 
-int
-__libc_creat(const char *path, mode_t mode)
-{
-
-	return(__sys_open(path, O_WRONLY | O_CREAT | O_TRUNC, mode));
-}
diff --git a/lib/libc/gen/Symbol.map b/lib/libc/gen/Symbol.map
index e01a897e3627..ee4d6197e150 100644
--- a/lib/libc/gen/Symbol.map
+++ b/lib/libc/gen/Symbol.map
@@ -533,14 +533,7 @@ FBSDprivate_1.0 {
 	_libc_sem_post_compat;
 	_libc_sem_getvalue_compat;
 
-	__libc_pause;
-	__libc_raise;
-	__libc_sleep;
 	__libc_tcdrain;
-	__libc_usleep;
-	__libc_wait;
-	__libc_wait3;
-	__libc_waitpid;
 
 	__elf_aux_vector;
 	__pthread_map_stacks_exec;
diff --git a/lib/libc/gen/pause.c b/lib/libc/gen/pause.c
index 97fbb017f5b6..ef48c1cd4518 100644
--- a/lib/libc/gen/pause.c
+++ b/lib/libc/gen/pause.c
@@ -33,10 +33,8 @@ static char sccsid[] = "@(#)pause.c	8.1 (Berkeley) 6/4/93";
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
-#include "namespace.h"
 #include <signal.h>
 #include <unistd.h>
-#include "un-namespace.h"
 
 #include "libc_private.h"
 
@@ -44,23 +42,14 @@ __FBSDID("$FreeBSD$");
  * Backwards compatible pause.
  */
 int
-__libc_pause(void)
+__pause(void)
 {
 	sigset_t oset;
 
-	if (_sigprocmask(SIG_BLOCK, NULL, &oset) == -1)
+	if (sigprocmask(SIG_BLOCK, NULL, &oset) == -1)
 		return (-1);
-	return (_sigsuspend(&oset));
+	return (sigsuspend(&oset));
 }
 
-#pragma weak pause
-int
-pause(void)
-{
-
-	return (((int (*)(void))
-	    __libc_interposing[INTERPOS_pause])());
-}
-
-__weak_reference(__libc_pause, __pause);
-__weak_reference(__libc_pause, _pause);
+__weak_reference(__pause, pause);
+__weak_reference(__pause, _pause);
diff --git a/lib/libc/gen/raise.c b/lib/libc/gen/raise.c
index d605639bed9a..994fea57911b 100644
--- a/lib/libc/gen/raise.c
+++ b/lib/libc/gen/raise.c
@@ -38,21 +38,15 @@ __FBSDID("$FreeBSD$");
 
 #include "libc_private.h"
 
-__weak_reference(__libc_raise, __raise);
-__weak_reference(__libc_raise, _raise);
+__weak_reference(__raise, raise);
+__weak_reference(__raise, _raise);
 
-#pragma weak raise
 int
-raise(int s)
+__raise(int s)
 {
+	long id;
 
-	return (((int (*)(int))
-	    __libc_interposing[INTERPOS_raise])(s));
-}
-
-int
-__libc_raise(int s)
-{
-
-	return (kill(getpid(), s));
+	if (__sys_thr_self(&id) == -1)
+		return (-1);
+	return (__sys_thr_kill(id, s));
 }
diff --git a/lib/libc/gen/sleep.c b/lib/libc/gen/sleep.c
index f558e3695a7d..6bb4ecd80838 100644
--- a/lib/libc/gen/sleep.c
+++ b/lib/libc/gen/sleep.c
@@ -42,17 +42,8 @@ __FBSDID("$FreeBSD$");
 
 #include "libc_private.h"
 
-#pragma weak sleep
 unsigned int
-sleep(unsigned int seconds)
-{
-
-	return (((unsigned int (*)(unsigned int))
-	    __libc_interposing[INTERPOS_sleep])(seconds));
-}
-
-unsigned int
-__libc_sleep(unsigned int seconds)
+__sleep(unsigned int seconds)
 {
 	struct timespec time_to_sleep;
 	struct timespec time_remaining;
@@ -62,17 +53,19 @@ __libc_sleep(unsigned int seconds)
 	 * the maximum value for a time_t is >= INT_MAX.
 	 */
 	if (seconds > INT_MAX)
-		return (seconds - INT_MAX + __libc_sleep(INT_MAX));
+		return (seconds - INT_MAX + __sleep(INT_MAX));
 
 	time_to_sleep.tv_sec = seconds;
 	time_to_sleep.tv_nsec = 0;
-	if (_nanosleep(&time_to_sleep, &time_remaining) != -1)
+	if (((int (*)(const struct timespec *, struct timespec *))
+	    __libc_interposing[INTERPOS_nanosleep])(
+	    &time_to_sleep, &time_remaining) != -1)
 		return (0);
 	if (errno != EINTR)
 		return (seconds);		/* best guess */
 	return (time_remaining.tv_sec +
-		(time_remaining.tv_nsec != 0)); /* round up */
+	    (time_remaining.tv_nsec != 0)); /* round up */
 }
 
-__weak_reference(__libc_sleep, __sleep);
-__weak_reference(__libc_sleep, _sleep);
+__weak_reference(__sleep, sleep);
+__weak_reference(__sleep, _sleep);
diff --git a/lib/libc/gen/usleep.c b/lib/libc/gen/usleep.c
index 1d58b9844389..7c35f6c6fd9c 100644
--- a/lib/libc/gen/usleep.c
+++ b/lib/libc/gen/usleep.c
@@ -40,24 +40,16 @@ __FBSDID("$FreeBSD$");
 
 #include "libc_private.h"
 
-#pragma weak usleep
 int
-usleep(useconds_t useconds)
-{
-
-	return (((int (*)(useconds_t))
-	    __libc_interposing[INTERPOS_usleep])(useconds));
-}
-
-int
-__libc_usleep(useconds_t useconds)
+__usleep(useconds_t useconds)
 {
 	struct timespec time_to_sleep;
 
 	time_to_sleep.tv_nsec = (useconds % 1000000) * 1000;
 	time_to_sleep.tv_sec = useconds / 1000000;
-	return (_nanosleep(&time_to_sleep, NULL));
+	return (((int (*)(const struct timespec *, struct timespec *))
+	    __libc_interposing[INTERPOS_nanosleep])(&time_to_sleep, NULL));
 }
 
-__weak_reference(__libc_usleep, __usleep);
-__weak_reference(__libc_usleep, _usleep);
+__weak_reference(__usleep, usleep);
+__weak_reference(__usleep, _usleep);
diff --git a/lib/libc/gen/wait.c b/lib/libc/gen/wait.c
index dc1351d00f92..46a3fdd0bf52 100644
--- a/lib/libc/gen/wait.c
+++ b/lib/libc/gen/wait.c
@@ -42,21 +42,13 @@ __FBSDID("$FreeBSD$");
 
 #include "libc_private.h"
 
-#pragma weak wait
 pid_t
-wait(int *istat)
+__wait(int *istat)
 {
 
-	return (((pid_t (*)(int *))
-	    __libc_interposing[INTERPOS_wait])(istat));
+	return (((pid_t (*)(pid_t, int *, int, struct rusage *))
+	    __libc_interposing[INTERPOS_wait4])(WAIT_ANY, istat, 0, NULL));
 }
 
-pid_t
-__libc_wait(int *istat)
-{
-
-	return (__sys_wait4(WAIT_ANY, istat, 0, NULL));
-}
-
-__weak_reference(__libc_wait, __wait);
-__weak_reference(__libc_wait, _wait);
+__weak_reference(__wait, wait);
+__weak_reference(__wait, _wait);
diff --git a/lib/libc/gen/wait3.c b/lib/libc/gen/wait3.c
index 2e116be8ebef..965effe43262 100644
--- a/lib/libc/gen/wait3.c
+++ b/lib/libc/gen/wait3.c
@@ -42,20 +42,12 @@ __FBSDID("$FreeBSD$");
 
 #include "libc_private.h"
 
-#pragma weak wait3
 pid_t
-wait3(int *istat, int options, struct rusage *rup)
+__wait3(int *istat, int options, struct rusage *rup)
 {
 
-	return (((pid_t (*)(int *, int, struct rusage *))
-	    __libc_interposing[INTERPOS_wait3])(istat, options, rup));
+	return (((pid_t (*)(pid_t, int *, int, struct rusage *))
+	    __libc_interposing[INTERPOS_wait4])(WAIT_ANY, istat, options, rup));
 }
 
-__weak_reference(__libc_wait3, __wait3);
-
-pid_t
-__libc_wait3(int *istat, int options, struct rusage *rup)
-{
-
-	return (__sys_wait4(WAIT_ANY, istat, options, rup));
-}
+__weak_reference(__wait3, wait3);
diff --git a/lib/libc/gen/waitpid.c b/lib/libc/gen/waitpid.c
index 27e920faf539..5177591a67cb 100644
--- a/lib/libc/gen/waitpid.c
+++ b/lib/libc/gen/waitpid.c
@@ -42,21 +42,13 @@ __FBSDID("$FreeBSD$");
 
 #include "libc_private.h"
 
-#pragma weak waitpid
 pid_t
-waitpid(pid_t pid, int *istat, int options)
+__waitpid(pid_t pid, int *istat, int options)
 {
 
-	return (((pid_t (*)(pid_t, int *, int))
-	    __libc_interposing[INTERPOS_waitpid])(pid, istat, options));
+	return (((pid_t (*)(pid_t, int *, int, struct rusage *))
+	    __libc_interposing[INTERPOS_wait4])(pid, istat, options, NULL));
 }
 
-pid_t
-__libc_waitpid(pid_t pid, int *istat, int options)
-{
-
-	return (__sys_wait4(pid, istat, options, NULL));
-}
-
-__weak_reference(__libc_waitpid, __waitpid);
-__weak_reference(__libc_waitpid, _waitpid);
+__weak_reference(__waitpid, waitpid);
+__weak_reference(__waitpid, _waitpid);
diff --git a/lib/libc/include/libc_private.h b/lib/libc/include/libc_private.h
index ea1a97b6dd47..347b46305d4b 100644
--- a/lib/libc/include/libc_private.h
+++ b/lib/libc/include/libc_private.h
@@ -187,17 +187,14 @@ enum {
 	INTERPOS_aio_suspend,
 	INTERPOS_close,
 	INTERPOS_connect,
-	INTERPOS_creat,
 	INTERPOS_fcntl,
 	INTERPOS_fsync,
 	INTERPOS_fork,
 	INTERPOS_msync,
 	INTERPOS_nanosleep,
-	INTERPOS_open,
 	INTERPOS_openat,
 	INTERPOS_poll,
 	INTERPOS_pselect,
-	INTERPOS_raise,
 	INTERPOS_recvfrom,
 	INTERPOS_recvmsg,
 	INTERPOS_select,
@@ -212,16 +209,10 @@ enum {
 	INTERPOS_sigwaitinfo,
 	INTERPOS_swapcontext,
 	INTERPOS_system,
-	INTERPOS_sleep,
 	INTERPOS_tcdrain,
-	INTERPOS_usleep,
-	INTERPOS_pause,
 	INTERPOS_read,
 	INTERPOS_readv,
-	INTERPOS_wait,
-	INTERPOS_wait3,
 	INTERPOS_wait4,
-	INTERPOS_waitpid,
 	INTERPOS_write,
 	INTERPOS_writev,
 	INTERPOS__pthread_mutex_init_calloc_cb,
@@ -353,23 +344,17 @@ int		__sys_sigwait(const __sigset_t *, int *);
 int		__sys_sigwaitinfo(const __sigset_t *, struct __siginfo *);
 int		__sys_swapcontext(struct __ucontext *,
 		    const struct __ucontext *);
+int		__sys_thr_kill(long, int);
+int		__sys_thr_self(long *);
 int		__sys_truncate(const char *, __off_t);
 __pid_t		__sys_wait4(__pid_t, int *, int, struct rusage *);
 __ssize_t	__sys_write(int, const void *, __size_t);
 __ssize_t	__sys_writev(int, const struct iovec *, int);
 
-int		__libc_creat(const char *path, __mode_t mode);
-int		__libc_pause(void);
-int		__libc_raise(int);
 int		__libc_sigwait(const __sigset_t * __restrict,
 		    int * restrict sig);
 int		__libc_system(const char *);
-unsigned int	__libc_sleep(unsigned int);
 int		__libc_tcdrain(int);
-int		__libc_usleep(__useconds_t);
-__pid_t		__libc_wait(int *);
-__pid_t		__libc_wait3(int *, int, struct rusage *);
-__pid_t		__libc_waitpid(__pid_t, int *, int);
 int		__fcntl_compat(int fd, int cmd, ...);
 
 /* execve() with PATH processing to implement posix_spawnp() */
diff --git a/lib/libc/sys/interposing_table.c b/lib/libc/sys/interposing_table.c
index 9987bf057a6c..d3037791b56b 100644
--- a/lib/libc/sys/interposing_table.c
+++ b/lib/libc/sys/interposing_table.c
@@ -44,17 +44,14 @@ interpos_func_t __libc_interposing[INTERPOS_MAX] = {
 	SLOT(aio_suspend, __sys_aio_suspend),
 	SLOT(close, __sys_close),
 	SLOT(connect, __sys_connect),
-	SLOT(creat, __libc_creat),
 	SLOT(fcntl, __fcntl_compat),
 	SLOT(fsync, __sys_fsync),
 	SLOT(fork, __sys_fork),
 	SLOT(msync, __sys_msync),
 	SLOT(nanosleep, __sys_nanosleep),
-	SLOT(open, __sys_open),
 	SLOT(openat, __sys_openat),
 	SLOT(poll, __sys_poll),
 	SLOT(pselect, __sys_pselect),
-	SLOT(raise, __libc_raise),
 	SLOT(read, __sys_read),
 	SLOT(readv, __sys_readv),
 	SLOT(recvfrom, __sys_recvfrom),
@@ -71,14 +68,8 @@ interpos_func_t __libc_interposing[INTERPOS_MAX] = {
 	SLOT(sigwaitinfo, __sys_sigwaitinfo),
 	SLOT(swapcontext, __sys_swapcontext),
 	SLOT(system, __libc_system),
-	SLOT(sleep, __libc_sleep),
 	SLOT(tcdrain, __libc_tcdrain),
-	SLOT(usleep, __libc_usleep),
-	SLOT(pause, __libc_pause),
-	SLOT(wait, __libc_wait),
-	SLOT(wait3, __libc_wait3),
 	SLOT(wait4, __sys_wait4),
-	SLOT(waitpid, __libc_waitpid),
 	SLOT(write, __sys_write),
 	SLOT(writev, __sys_writev),
 	SLOT(_pthread_mutex_init_calloc_cb, _pthread_mutex_init_calloc_cb_stub),
diff --git a/lib/libc/sys/open.c b/lib/libc/sys/open.c
index 57c0324c545c..e0273c68a34c 100644
--- a/lib/libc/sys/open.c
+++ b/lib/libc/sys/open.c
@@ -54,6 +54,6 @@ open(const char *path, int flags, ...)
 	} else {
 		mode = 0;
 	}
-	return (((int (*)(const char *, int, ...))
-	    __libc_interposing[INTERPOS_open])(path, flags, mode));
+	return (((int (*)(int, const char *, int, ...))
+	    __libc_interposing[INTERPOS_openat])(AT_FDCWD, path, flags, mode));
 }
diff --git a/lib/libthr/thread/thr_private.h b/lib/libthr/thread/thr_private.h
index 0c16b2a63dfb..d62de98516d7 100644
--- a/lib/libthr/thread/thr_private.h
+++ b/lib/libthr/thread/thr_private.h
@@ -917,8 +917,6 @@ void _thr_stack_fix_protection(struct pthread *thrd);
 int *__error_threaded(void) __hidden;
 void __thr_interpose_libc(void) __hidden;
 pid_t __thr_fork(void);
-int __thr_pause(void) __hidden;
-int __thr_raise(int sig);
 int __thr_setcontext(const ucontext_t *ucp);
 int __thr_sigaction(int sig, const struct sigaction *act,
     struct sigaction *oact) __hidden;
diff --git a/lib/libthr/thread/thr_sig.c b/lib/libthr/thread/thr_sig.c
index 1ec64f03f569..7cd0f75412d8 100644
--- a/lib/libthr/thread/thr_sig.c
+++ b/lib/libthr/thread/thr_sig.c
@@ -515,23 +515,6 @@ _thr_signal_deinit(void)
 }
 
 int
-__thr_pause(void)
-{
-	sigset_t oset;
-
-	if (_sigprocmask(SIG_BLOCK, NULL, &oset) == -1)
-		return (-1);
-	return (__thr_sigsuspend(&oset));
-}
-
-int
-__thr_raise(int sig)
-{
-
-	return (_thr_send_sig(_get_curthread(), sig));
-}
-
-int
 __thr_sigaction(int sig, const struct sigaction *act, struct sigaction *oact)
 {
 	struct sigaction newact, oldact, oldact2;
diff --git a/lib/libthr/thread/thr_syscalls.c b/lib/libthr/thread/thr_syscalls.c
index a4fe7e87e211..06b63c872ceb 100644
--- a/lib/libthr/thread/thr_syscalls.c
+++ b/lib/libthr/thread/thr_syscalls.c
@@ -99,10 +99,6 @@ __FBSDID("$FreeBSD$");
 extern int __fcntl_compat(int, int, ...);
 #endif
 
-/*
- * Cancellation behavior:
- *   If thread is canceled, no socket is created.
- */
 static int
 __thr_accept(int s, struct sockaddr *addr, socklen_t *addrlen)
 {
@@ -189,25 +185,6 @@ __thr_connect(int fd, const struct sockaddr *name, socklen_t namelen)
  	return (ret);
 }
 
-
-/*
- * Cancellation behavior:
- *   If thread is canceled, file is not created.
- */
-static int
-__thr_creat(const char *path, mode_t mode)
-{
-	struct pthread *curthread;
-	int ret;
-
-	curthread = _get_curthread();
-	_thr_cancel_enter(curthread);
-	ret = __libc_creat(path, mode);
-	_thr_cancel_leave(curthread, ret == -1);
-	
-	return (ret);
-}
-
 /*
  * Cancellation behavior:
  *   According to specification, only F_SETLKW is a cancellation point.
@@ -300,35 +277,6 @@ __thr_nanosleep(const struct timespec *time_to_sleep,
  *   If the thread is canceled, file is not opened.
  */
 static int
-__thr_open(const char *path, int flags,...)
-{
-	struct pthread *curthread;
-	int mode, ret;
-	va_list	ap;
-
-	/* Check if the file is being created: */
-	if ((flags & O_CREAT) != 0) {
-		/* Get the creation mode: */
-		va_start(ap, flags);
-		mode = va_arg(ap, int);
-		va_end(ap);
-	} else {
-		mode = 0;
-	}
-	
-	curthread = _get_curthread();
-	_thr_cancel_enter(curthread);
-	ret = __sys_open(path, flags, mode);
-	_thr_cancel_leave(curthread, ret == -1);
-
-	return (ret);
-}
-
-/*
- * Cancellation behavior:
- *   If the thread is canceled, file is not opened.
- */
-static int
 __thr_openat(int fd, const char *path, int flags, ...)
 {
 	struct pthread *curthread;
@@ -523,19 +471,6 @@ __thr_sendto(int s, const void *m, size_t l, int f, const struct sockaddr *t,
 	return (ret);
 }
 
-static unsigned int
-__thr_sleep(unsigned int seconds)
-{
-	struct pthread *curthread;
-	unsigned int ret;
-
-	curthread = _get_curthread();
-	_thr_cancel_enter(curthread);
-	ret = __libc_sleep(seconds);
-	_thr_cancel_leave(curthread, 1);
-	return (ret);
-}
-
 static int
 __thr_system(const char *string)
 {
@@ -567,55 +502,6 @@ __thr_tcdrain(int fd)
 	return (ret);
 }
 
-static int
-__thr_usleep(useconds_t useconds)
-{
-	struct pthread *curthread;
-	int ret;
-
-	curthread = _get_curthread();
-	_thr_cancel_enter(curthread);
-	ret = __libc_usleep(useconds);
-	_thr_cancel_leave(curthread, 1);
-	return (ret);
-}
-
-/*
- * Cancellation behavior:
- *   Thread may be canceled at start, but if the system call returns
- *   a child pid, the thread is not canceled.
- */
-static pid_t
-__thr_wait(int *istat)
-{
-	struct pthread *curthread;
-	pid_t ret;
-
-	curthread = _get_curthread();
-	_thr_cancel_enter(curthread);
-	ret = __libc_wait(istat);
-	_thr_cancel_leave(curthread, ret <= 0);
-	return (ret);
-}
-
-/*
- * Cancellation behavior:
- *   Thread may be canceled at start, but if the system call returns
- *   a child pid, the thread is not canceled.
- */
-static pid_t
-__thr_wait3(int *status, int options, struct rusage *rusage)
-{
-	struct pthread *curthread;
-	pid_t ret;
-
-	curthread = _get_curthread();
-	_thr_cancel_enter(curthread);
-	ret = __libc_wait3(status, options, rusage);
-	_thr_cancel_leave(curthread, ret <= 0);
-	return (ret);
-}
-
 /*
  * Cancellation behavior:
  *   Thread may be canceled at start, but if the system call returns
@@ -636,24 +522,6 @@ __thr_wait4(pid_t pid, int *status, int options, struct rusage *rusage)
 
 /*
  * Cancellation behavior:
- *   Thread may be canceled at start, but if the system call returns
- *   a child pid, the thread is not canceled.
- */
-static pid_t
-__thr_waitpid(pid_t wpid, int *status, int options)
-{
-	struct pthread *curthread;
-	pid_t ret;
-
-	curthread = _get_curthread();
-	_thr_cancel_enter(curthread);
-	ret = __libc_waitpid(wpid, status, options);
-	_thr_cancel_leave(curthread, ret <= 0);
-	return (ret);
-}
-
-/*
- * Cancellation behavior:
  *   Thread may be canceled at start, but if the thread wrote some data,
  *   it is not canceled.
  */
@@ -701,17 +569,14 @@ __thr_interpose_libc(void)
 	SLOT(aio_suspend);
 	SLOT(close);
 	SLOT(connect);
-	SLOT(creat);
 	SLOT(fcntl);
 	SLOT(fsync);
 	SLOT(fork);
 	SLOT(msync);
 	SLOT(nanosleep);
-	SLOT(open);
 	SLOT(openat);
 	SLOT(poll);
 	SLOT(pselect);
-	SLOT(raise);
 	SLOT(read);
 	SLOT(readv);
 	SLOT(recvfrom);
@@ -728,14 +593,8 @@ __thr_interpose_libc(void)
 	SLOT(sigwaitinfo);
 	SLOT(swapcontext);
 	SLOT(system);
-	SLOT(sleep);
 	SLOT(tcdrain);
-	SLOT(usleep);
-	SLOT(pause);
-	SLOT(wait);
-	SLOT(wait3);
 	SLOT(wait4);
-	SLOT(waitpid);
 	SLOT(write);
 	SLOT(writev);
 #undef SLOT