Sat May 4 05:44:25 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu>

	* hurd/hurd-raise.c (_hurd_raise_signal): Pass sigcode in msg_sig_post
	rpc.

	* hurd/hurdmsg.c (_S_msg_set_environment): Use argz.h functions
	instead of _hurd_split_args.
	(_S_msg_*_exec_flags): Functions removed.
	(_S_msg_startup_dosync): Stub removed.

Sat May  4 02:11:55 1996  Roland McGrath  <roland@delasyd.gnu.ai.mit.edu>

	* sysdeps/mach/hurd/ptrace.c: Set _hurdsig_traced instead of
	EXEC_TRACED bit in _hurd_exec_flags.
	Pass sigcode arg in msg_sig_post_untraced rpc.

	* sysdeps/mach/hurd/access.c: Don't pass io port in
	auth_user_authenticate rpc.

	* posix/sched.h: Fix typos.

	* sysdeps/mach/hurd/fork.c: Use new critical section lock.
	Clear _hurdsig_traced instead of EXEC_TRACED.

	* sysdeps/stub/nanosleep.c (nanosleep): Fix typo.

	* wcsmbs/wcstol.c: Find strtol.c in ../stdlib.
	* wcsmbs/wcstof.c: Find strtod.c in ../stdlib.
	* wcsmbs/wcstod.c: Likewise.
	* wcsmbs/wcstold.c: Likewise.

	* wcsmbs/wcwidth.h: Find cname-lookup.h in ../wctype.

	* string/envz.c (envz_entry): Use const.
	(envz_get, envz_remove): Likewise.
	(envz_entry): Return char *, not const char *.

	* string/envz.h: Fix decl.

	* string/argz-create.c: Use const in prototype.
	* string/argz-next.c: Likewise.

	* sysdeps/mach/hurd/sigprocmask.c: Pass sigcode arg to msg_sig_post.
	* sysdeps/mach/hurd/i386/sigreturn.c: Likewise.
	* sysdeps/mach/hurd/sigsuspend.c: Likewise.
	* sysdeps/mach/hurd/kill.c: Likewise.

	* hurd/hurdexec.c (_hurd_exec): Use new critical section lock.
	* hurd/catch-exc.c (_S_catch_exception_raise): Likewise.
	* hurd/sigunwind.c (_hurdsig_longjmp_from_handler): Likewise.
	* hurd/thread-cancel.c (hurd_thread_cancel, hurd_check_cancel):
	Likewise.
	* sysdeps/mach/hurd/jmp-unwind.c (_longjmp_unwind): Likewise.
	* sysdeps/mach/hurd/sigaction.c: Likewise.

	* sysdeps/mach/hurd/errnos.awk: Don't use ARGV in comment; it can
	change meaninglessly.

	* hurd/hurd/signal.h (struct hurd_sigstate): Replace critical section
 	flag with a spin lock.
	(_hurd_critical_section_lock): Use spin_try_lock on that to see if we
 	get it.  No need to take SS->lock at all.
	(_hurd_critical_section_unlock): Unlock SS->critical_section_lock
	instead of clearing the old flag member.
	* hurd/hurdsig.c (_hurd_internal_post_signal): Use spin_lock_locked to
	test the critical section state.

	* hurd/hurdinit.c (_hurd_init): Set _hurdsig_traced from the intarray.

	* hurd/hurdkill.c (_hurd_sig_post): Pass 0 sigcode in msg_sig_post.

	* hurd/hurdsig.c (_hurd_internal_post_signal): Test _hurdsig_traced
 	instead of testing (_hurd_exec_flags & EXEC_TRACED).
	(_S_msg_sig_post): Take sigcode arg and pass it through.
	(_S_msg_sig_post_untraced): Likewise.
	(reauth_proc): Don't pass proc port in auth_user_authenticate.

	* hurd/setauth.c (_hurd_setauth): Don't pass object ports in
	auth_user_authenticate RPCs, just the one-off rendezvous port.
	* hurd/dtable.c (reauth_dtable): Likewise.
	* hurd/hurdlookup.c (__hurd_file_name_lookup_retry): Likewise.

	* hurd/hurdexec.c (_hurd_exec): Pass 0 flags to file_exec.
	Pass sigcode arg to msg_sig_post.

	* string/argz.h (argz_create): Use const in prototype.

	* hurd/hurdinit.c (_hurd_proc_init): Test _hurdsig_traced instead of
	testing (_hurd_exec_flags & EXEC_TRACED).
	Pass sigcode arg to msg_sig_post.

	* hurd/hurd.h: Declare _hurdsig_traced.

	* string/argz.h (__argz_next): Cast ENTRY before returning it.

	* hurd/hurd/signal.h (_hurd_critical_section_unlock): Pass sigcode arg
	to msg_sig_post.

	* hurd/path-lookup.c: New file.
	* hurd/Makefile (routines): Add path-lookup.
	* hurd/hurd/lookup.h: Declare file_name_path_scan,
	hurd_file_name_path_lookup.
	* hurd/hurd.h: Declare file_name_path_lookup.

	* sysdeps/mach/hurd/select.c: The io_select rpc no longer has a TAG_ID
	argument.  Instead, use a separate reply port for each RPC and put them
	all in a port set to wait for slow replies.

17 files changed, 232 insertions, 121 deletions

diff --git a/hurd/Makefile b/hurd/Makefile
index af3ba2dad1..3a9d08e4a4 100644
--- a/hurd/Makefile
+++ b/hurd/Makefile
@@ -42,6 +42,7 @@ server-interfaces	:= hurd/msg
 
 routines = hurdstartup hurdinit \
 	   hurdid hurdlookup hurdpid hurdrlimit hurdprio hurdexec \
+	   path-lookup \
 	   setauth \
 	   pid2task task2pid \
 	   getuids setuids getumask fchroot \
diff --git a/hurd/catch-exc.c b/hurd/catch-exc.c
index 72e06db1d3..8ab38a2a61 100644
--- a/hurd/catch-exc.c
+++ b/hurd/catch-exc.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1994, 1995 Free Software Foundation, Inc.
+/* Copyright (C) 1994, 1995, 1996 Free Software Foundation, Inc.
 This file is part of the GNU C Library.
 
 The GNU C Library is free software; you can redistribute it and/or
@@ -64,7 +64,7 @@ _S_catch_exception_raise (mach_port_t port,
 	 no code should do anything that can fault while holding the
 	 sigstate lock.  */
 
-      ss->critical_section = 0;
+      __spin_unlock (&ss->critical_section_lock);
       ss->context = NULL;
       __spin_unlock (&ss->lock);
     }
diff --git a/hurd/dtable.c b/hurd/dtable.c
index ea683d0b0d..d1ee999857 100644
--- a/hurd/dtable.c
+++ b/hurd/dtable.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
+/* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996 Free Software Foundation, Inc.
 This file is part of the GNU C Library.
 
 The GNU C Library is free software; you can redistribute it and/or
@@ -173,7 +173,7 @@ static void
 ctty_new_pgrp (void)
 {
   int i;
-  
+
   HURD_CRITICAL_BEGIN;
   __mutex_lock (&_hurd_dtable_lock);
 
@@ -226,7 +226,7 @@ reauth_dtable (void)
     {
       struct hurd_fd *const d = _hurd_dtable[i];
       mach_port_t new, newctty, ref;
-      
+
       if (d == NULL)
 	/* Nothing to do for an unused descriptor cell.  */
 	continue;
@@ -235,14 +235,13 @@ reauth_dtable (void)
 
       /* Take the descriptor cell's lock.  */
       __spin_lock (&d->port.lock);
-      
+
       /* Reauthenticate the descriptor's port.  */
       if (d->port.port != MACH_PORT_NULL &&
 	  ! __io_reauthenticate (d->port.port,
 				 ref, MACH_MSG_TYPE_MAKE_SEND) &&
 	  ! __USEPORT (AUTH, __auth_user_authenticate
 		       (port,
-			d->port.port,
 			ref, MACH_MSG_TYPE_MAKE_SEND,
 			&new)))
 	{
@@ -254,7 +253,6 @@ reauth_dtable (void)
 				     ref, MACH_MSG_TYPE_MAKE_SEND) &&
 	      ! __USEPORT (AUTH, __auth_user_authenticate
 			   (port,
-			    d->ctty.port,
 			    ref, MACH_MSG_TYPE_MAKE_SEND,
 			    &newctty)))
 	    _hurd_port_set (&d->ctty, newctty);
diff --git a/hurd/hurd-raise.c b/hurd/hurd-raise.c
index ad01ab9f89..59179da5f6 100644
--- a/hurd/hurd-raise.c
+++ b/hurd/hurd-raise.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1994, 1995 Free Software Foundation, Inc.
+/* Copyright (C) 1994, 1995, 1996 Free Software Foundation, Inc.
 This file is part of the GNU C Library.
 
 The GNU C Library is free software; you can redistribute it and/or
@@ -44,5 +44,5 @@ _hurd_raise_signal (struct hurd_sigstate *ss,
 
   /* Send a message to the signal thread so it
      will wake up and check for pending signals.  */
-  __msg_sig_post (_hurd_msgport, 0, __mach_task_self ());
+  __msg_sig_post (_hurd_msgport, signo, sigcode, __mach_task_self ());
 }
diff --git a/hurd/hurd.h b/hurd/hurd.h
index 55be1579fb..212db45753 100644
--- a/hurd/hurd.h
+++ b/hurd/hurd.h
@@ -76,6 +76,7 @@ extern int _hurd_exec_flags;	/* Flags word passed in exec_startup.  */
 extern struct hurd_port *_hurd_ports;
 extern unsigned int _hurd_nports;
 extern volatile mode_t _hurd_umask;
+extern sigset_t _hurdsig_traced;
 
 /* Shorthand macro for internal library code referencing _hurd_ports (see
    <hurd/port.h>).  */
@@ -183,6 +184,21 @@ extern file_t file_name_lookup_under (file_t startdir, const char *file,
 				      int flags, mode_t mode);
 
 
+/* Lookup FILE_NAME and return the node opened with FLAGS & MODE
+   (see hurd_file_name_lookup for details), but a simple file name (without
+   any directory prefixes) will be consecutively prefixed with the pathnames
+   in the `:' separated list PATH until one succeeds in a successful lookup.
+   If none succeed, then the first error that wasn't ENOENT is returned, or
+   ENOENT if no other errors were returned.  If PREFIXED_NAME is non-NULL,
+   then if the result is looked up directly, *PREFIXED_NAME is set to NULL, and
+   if it is looked up using a prefix from PATH, *PREFIXED_NAME is set to
+   malloc'd storage containing the prefixed name.  */
+extern file_t file_name_path_lookup (const char *file_name, const char *path,
+				     int flags, mode_t mode,
+				     char **prefixed_name);
+
+
+
 /* Open a file descriptor on a port.  FLAGS are as for `open'; flags
    affected by io_set_openmodes are not changed by this.  If successful,
    this consumes a user reference for PORT (which will be deallocated on
diff --git a/hurd/hurd/lookup.h b/hurd/hurd/lookup.h
index 6911b8f5b9..565ab317c8 100644
--- a/hurd/hurd/lookup.h
+++ b/hurd/hurd/lookup.h
@@ -1,5 +1,5 @@
 /* Declarations of file name translation functions for the GNU Hurd.
-Copyright (C) 1995 Free Software Foundation, Inc.
+Copyright (C) 1995, 1996 Free Software Foundation, Inc.
 This file is part of the GNU C Library.
 
 The GNU C Library is free software; you can redistribute it and/or
@@ -98,4 +98,33 @@ error_t hurd_file_name_lookup_retry (error_t (*use_init_port)
 				     file_t *result);
 
 
+/* If FILE_NAME contains a '/', or PATH is NULL, call FUN with FILE_NAME, and
+   return the result (if PREFIXED_NAME is non-NULL, setting *PREFIXED_NAME to
+   NULL).  Otherwise, call FUN repeatedly with FILE_NAME prefixed with each
+   successive `:' separated element of PATH, returning whenever FUN returns
+   0 (if PREFIXED_NAME is non-NULL, setting *PREFIXED_NAME to the resulting
+   prefixed path).  If FUN never returns 0, return the first non-ENOENT
+   return value, or ENOENT if there is none.  */
+error_t file_name_path_scan (const char *file_name, const char *path,
+			     error_t (*fun)(const char *name),
+			     char **prefixed_name);
+
+/* Lookup FILE_NAME and return the node opened with FLAGS & MODE in result
+   (see hurd_file_name_lookup for details), but a simple filename (without
+   any directory prefixes) will be consectutively prefixed with the pathnames
+   in the `:' separated list PATH until one succeeds in a successful lookup.
+   If none succeed, then the first error that wasn't ENOENT is returned, or
+   ENOENT if no other errors were returned.  If PREFIXED_NAME is non-NULL,
+   then if RESULT is looked up directly, *PREFIXED_NAME is set to NULL, and
+   if it is looked up using a prefix from PATH, *PREFIXED_NAME is set to
+   malloced storage containing the prefixed name.  */
+error_t hurd_file_name_path_lookup (error_t (*use_init_port)
+				    (int which,
+				     error_t (*operate) (mach_port_t)),
+				    file_t (*get_dtable_port) (int fd),
+				    const char *file_name, const char *path,
+				    int flags, mode_t mode,
+				    file_t *result, char **prefixed_name);
+
+
 #endif	/* hurd/lookup.h */
diff --git a/hurd/hurd/signal.h b/hurd/hurd/signal.h
index 1973bcdb3c..fdaafdf459 100644
--- a/hurd/hurd/signal.h
+++ b/hurd/hurd/signal.h
@@ -47,9 +47,9 @@ struct hurd_signal_preempter;	/* <hurd/sigpreempt.h> */
 
 struct hurd_sigstate
   {
-    spin_lock_t lock;		/* Locks most of the rest of the structure.  */
+    spin_lock_t critical_section_lock; /* Held if in critical section.  */
 
-    int critical_section;	/* Nonzero if in critical section.  */
+    spin_lock_t lock;		/* Locks most of the rest of the structure.  */
 
     thread_t thread;
     struct hurd_sigstate *next; /* Linked-list of thread sigstates.  */
@@ -159,27 +159,22 @@ _hurd_critical_section_lock (void)
     (void *) __hurd_threadvar_location (_HURD_THREADVAR_SIGSTATE);
   struct hurd_sigstate *ss = *location;
   if (ss == NULL)
-    /* The thread variable is unset; this must be the first time we've
-       asked for it.  In this case, the critical section flag cannot
-       possible already be set.  Look up our sigstate structure the slow
-       way; this locks the sigstate lock.  */
-    ss = *location = _hurd_thread_sigstate (__mach_thread_self ());
-  else
-    __spin_lock (&ss->lock);
-
-  if (ss->critical_section)
     {
-      /* We are already in a critical section, so do nothing.  */
+      /* The thread variable is unset; this must be the first time we've
+	 asked for it.  In this case, the critical section flag cannot
+	 possible already be set.  Look up our sigstate structure the slow
+	 way; this locks the sigstate lock.  */
+      ss = *location = _hurd_thread_sigstate (__mach_thread_self ());
       __spin_unlock (&ss->lock);
-      return NULL;
     }
 
-  /* Set the critical section flag so no signal handler will run.  */
-  ss->critical_section = 1;
-  __spin_unlock (&ss->lock);
+  if (! __spin_try_lock (&ss->critical_section_lock))
+    /* We are already in a critical section, so do nothing.  */
+    return NULL;
 
-  /* Return our sigstate pointer; this will be passed to
-     _hurd_critical_section_unlock to clear the critical section flag. */
+  /* With the critical section lock held no signal handler will run.
+     Return our sigstate pointer; this will be passed to
+     _hurd_critical_section_unlock to unlock it.  */
   return ss;
 }
 
@@ -191,19 +186,18 @@ _hurd_critical_section_unlock (void *our_lock)
     return;
   else
     {
-      /* It was us who acquired the critical section lock.  Clear the
-	 critical section flag.  */
+      /* It was us who acquired the critical section lock.  Unlock it.  */
       struct hurd_sigstate *ss = our_lock;
       sigset_t pending;
       __spin_lock (&ss->lock);
-      ss->critical_section = 0;
+      __spin_unlock (&ss->critical_section_lock);
       pending = ss->pending & ~ss->blocked;
       __spin_unlock (&ss->lock);
       if (pending)
 	/* There are unblocked signals pending, which weren't
 	   delivered because we were in the critical section.
 	   Tell the signal thread to deliver them now.  */
-	__msg_sig_post (_hurd_msgport, 0, __mach_task_self ());
+	__msg_sig_post (_hurd_msgport, 0, 0, __mach_task_self ());
     }
 }
 
diff --git a/hurd/hurdexec.c b/hurd/hurdexec.c
index 7893c9177b..4c0d8ae5e5 100644
--- a/hurd/hurdexec.c
+++ b/hurd/hurdexec.c
@@ -25,6 +25,7 @@ Cambridge, MA 02139, USA.  */
 #include <hurd.h>
 #include <hurd/fd.h>
 #include <hurd/signal.h>
+#include <assert.h>
 #include <argz.h>
 
 /* Overlay TASK, executing FILE with arguments ARGV and environment ENVP.
@@ -35,7 +36,7 @@ _hurd_exec (task_t task, file_t file,
 	    char *const argv[], char *const envp[])
 {
   error_t err;
-  char *args, *env, *ap;
+  char *args, *env;
   size_t argslen, envlen;
   int ints[INIT_INT_MAX];
   mach_port_t ports[_hurd_nports];
@@ -44,10 +45,10 @@ _hurd_exec (task_t task, file_t file,
   unsigned int dtablesize, i;
   struct hurd_port **dtable_cells;
   struct hurd_userlink *ulink_dtable;
-  char *const *p;
   struct hurd_sigstate *ss;
   mach_port_t *please_dealloc, *pdp;
 
+  /* XXX needs to be hurdmalloc XXX */
   if (err = __argz_create (argv, &args, &argslen))
     return err;
   if (err = __argz_create (envp, &env, &envlen))
@@ -89,6 +90,10 @@ _hurd_exec (task_t task, file_t file,
       }
 
   ss = _hurd_self_sigstate ();
+
+  assert (! __spin_lock_locked (&ss->critical_section_lock));
+  __spin_lock (&ss->critical_section_lock);
+
   __spin_lock (&ss->lock);
   ints[INIT_SIGMASK] = ss->blocked;
   ints[INIT_SIGPENDING] = ss->pending;
@@ -105,7 +110,6 @@ _hurd_exec (task_t task, file_t file,
      critical section flag avoids anything we call trying to acquire the
      sigstate lock.  */
 
-  ss->critical_section = 1;
   __spin_unlock (&ss->lock);
 
   /* Pack up the descriptor table to give the new program.  */
@@ -192,8 +196,7 @@ _hurd_exec (task_t task, file_t file,
 	  *pdp++ = dtable[i];
       }
 
-    err = __file_exec (file, task,
-		       _hurd_exec_flags & EXEC_INHERITED,
+    err = __file_exec (file, task, 0,
 		       args, argslen, env, envlen,
 		       dtable, MACH_MSG_TYPE_COPY_SEND, dtablesize,
 		       ports, MACH_MSG_TYPE_COPY_SEND, _hurd_nports,
@@ -219,15 +222,7 @@ _hurd_exec (task_t task, file_t file,
   __mutex_unlock (&_hurd_dtable_lock);
 
   /* Safe to let signals happen now.  */
-  {
-    sigset_t pending;
-    __spin_lock (&ss->lock);
-    ss->critical_section = 0;
-    pending = ss->pending & ~ss->blocked;
-    __spin_unlock (&ss->lock);
-    if (pending)
-      __msg_sig_post (_hurd_msgport, 0, __mach_task_self ());
-  }
+  _hurd_critical_section_unlock (ss);
 
  outargs:
   free (args);
diff --git a/hurd/hurdinit.c b/hurd/hurdinit.c
index e7558c3ef7..cd37065f93 100644
--- a/hurd/hurdinit.c
+++ b/hurd/hurdinit.c
@@ -30,6 +30,7 @@ int _hurd_exec_flags;
 struct hurd_port *_hurd_ports;
 unsigned int _hurd_nports;
 mode_t _hurd_umask;
+sigset_t _hurdsig_traced;
 
 error_t
 _hurd_ports_use (int which, error_t (*operate) (mach_port_t))
@@ -78,6 +79,9 @@ _hurd_init (int flags, char **argv,
   else
     _hurd_umask = CMASK;
 
+  if (intarraysize > INIT_TRACEMASK)
+    _hurdsig_traced = intarray[INIT_TRACEMASK];
+
   /* All done with init ints and ports.  */
   __vm_deallocate (__mach_task_self (),
 		   (vm_address_t) intarray,
@@ -147,11 +151,11 @@ _hurd_proc_init (char **argv)
      here, like _hurd_pid, are already initialized.  */
   RUN_HOOK (_hurd_proc_subinit, ());
 
-  if (_hurd_exec_flags & EXEC_TRACED)
+  if (_hurdsig_traced)
     /* This process is "traced", meaning it should stop on signals or exec.
        We are all set up now to handle signals.  Stop ourselves, to inform
        our parent (presumably a debugger) that the exec has completed.  */
-    __msg_sig_post (_hurd_msgport, SIGTRAP, __mach_task_self ());
+    __msg_sig_post (_hurd_msgport, SIGTRAP, 0, __mach_task_self ());
 }
 
 /* Called when we get a message telling us to change our proc server port.  */
diff --git a/hurd/hurdkill.c b/hurd/hurdkill.c
index a8f101d768..4fab0346f6 100644
--- a/hurd/hurdkill.c
+++ b/hurd/hurdkill.c
@@ -42,7 +42,7 @@ _hurd_sig_post (pid_t pid, int sig, mach_port_t arg_refport)
 			      (refport = arg_refport, 0), 0,
 			      /* If no message port we cannot send signals.  */
 			      msgport == MACH_PORT_NULL ? EPERM :
-			      __msg_sig_post (msgport, sig, refport));
+			      __msg_sig_post (msgport, sig, 0, refport));
       if (! err)
 	delivered = 1;
     }
diff --git a/hurd/hurdlookup.c b/hurd/hurdlookup.c
index 41ea32774e..a5a114aa44 100644
--- a/hurd/hurdlookup.c
+++ b/hurd/hurdlookup.c
@@ -100,7 +100,7 @@ __hurd_file_name_lookup_retry (error_t (*use_init_port)
       mach_port_t ref = __mach_reply_port ();
       error_t reauth (auth_t auth)
 	{
-	  return __auth_user_authenticate (auth, unauth, ref,
+	  return __auth_user_authenticate (auth, ref,
 					   MACH_MSG_TYPE_MAKE_SEND,
 					   result);
 	}
diff --git a/hurd/hurdmsg.c b/hurd/hurdmsg.c
index acec1f5fdf..32d1a5c975 100644
--- a/hurd/hurdmsg.c
+++ b/hurd/hurdmsg.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1992, 1994, 1995 Free Software Foundation, Inc.
+/* Copyright (C) 1992, 1994, 1995, 1996 Free Software Foundation, Inc.
 This file is part of the GNU C Library.
 
 The GNU C Library is free software; you can redistribute it and/or
@@ -22,6 +22,7 @@ Cambridge, MA 02139, USA.  */
 #include <unistd.h>
 #include <limits.h>
 #include <string.h>
+#include <argz.h>
 
 
 #define AUTHCHECK \
@@ -377,57 +378,15 @@ _S_msg_set_environment (mach_port_t msgport, mach_port_t auth,
 
   AUTHCHECK;
 
-  envc = _hurd_split_args (data, datalen, NULL);
+  envc = __argz_count (data, datalen);
   envp = malloc ((envc + 1) * sizeof (char *));
   if (envp == NULL)
     return errno;
-  _hurd_split_args (data, datalen, envp);
+  __argz_extract (data, datalen, envp);
   __environ = envp;		/* XXX cooperate with loadenv et al */
   return 0;
 }
 
-/* Get and frob the exec flags.  */
-
-kern_return_t
-_S_msg_get_exec_flags (mach_port_t process, mach_port_t auth,
-		       int *flags)
-{
-  AUTHCHECK;
-
-  *flags = _hurd_exec_flags;
-  return 0;
-}
-
-kern_return_t
-_S_msg_set_all_exec_flags (mach_port_t process, mach_port_t auth,
-			   int flags)
-{
-  AUTHCHECK;
-
-  _hurd_exec_flags = flags;
-  return 0;
-}
-
-kern_return_t
-_S_msg_set_some_exec_flags (mach_port_t process, mach_port_t auth,
-			    int flags)
-{
-  AUTHCHECK;
-
-  _hurd_exec_flags |= flags;
-  return 0;
-}
-
-kern_return_t
-_S_msg_clear_some_exec_flags (mach_port_t process, mach_port_t auth,
-			      int flags)
-{
-  AUTHCHECK;
-
-  _hurd_exec_flags &= ~flags;
-  return 0;
-}
-
 
 /* XXX */
 
@@ -445,7 +404,3 @@ _S_msg_set_dtable (mach_port_t process,
 		   portarray_t dtable,
 		   mach_msg_type_number_t dtableCnt)
 { return EOPNOTSUPP; }
-
-kern_return_t
-_S_msg_startup_dosync (mach_port_t process)
-{ return EOPNOTSUPP; }
diff --git a/hurd/hurdsig.c b/hurd/hurdsig.c
index a84e7bc54e..b1a551d7f3 100644
--- a/hurd/hurdsig.c
+++ b/hurd/hurdsig.c
@@ -564,7 +564,7 @@ _hurd_internal_post_signal (struct hurd_sigstate *ss,
     {
       /* No preemption.  Do normal handling.  */
 
-      if (!untraced && (_hurd_exec_flags & EXEC_TRACED))
+      if (!untraced && __sigismember (&_hurdsig_traced, signo))
 	{
 	  /* We are being traced.  Stop to tell the debugger of the signal.  */
 	  if (_hurd_stopped)
@@ -785,7 +785,7 @@ _hurd_internal_post_signal (struct hurd_sigstate *ss,
 	    /* The thread was in sigreturn, not in any interruptible RPC.  */
 	    wait_for_reply = 0;
 
-	    assert (! ss->critical_section);
+	    assert (! __spin_lock_locked (&ss->critical_section_lock));
 	  }
 	else
 	  {
@@ -795,7 +795,7 @@ _hurd_internal_post_signal (struct hurd_sigstate *ss,
 				      &reply)
 		 != MACH_PORT_NULL);
 
-	    if (ss->critical_section)
+	    if (__spin_lock_locked (&ss->critical_section_lock))
 	      {
 		/* The thread is in a critical section.  Mark the signal as
 		   pending.  When it finishes the critical section, it will
@@ -883,7 +883,7 @@ _hurd_internal_post_signal (struct hurd_sigstate *ss,
        thread finishes its critical section.  */
     inline int signals_pending (void)
       {
-	if (_hurd_stopped || ss->critical_section)
+	if (_hurd_stopped || __spin_lock_locked (&ss->critical_section_lock))
 	  return 0;
 	return pending = ss->pending & ~ss->blocked;
       }
@@ -1057,7 +1057,7 @@ signal_allowed (int signo, mach_port_t refport)
 kern_return_t
 _S_msg_sig_post (mach_port_t me,
 		 mach_port_t reply_port, mach_msg_type_name_t reply_port_type,
-		 int signo,
+		 int signo, natural_t sigcode,
 		 mach_port_t refport)
 {
   error_t err;
@@ -1068,7 +1068,7 @@ _S_msg_sig_post (mach_port_t me,
   /* Post the signal to the designated signal-receiving thread.  This will
      reply when the signal can be considered delivered.  */
   _hurd_internal_post_signal (_hurd_thread_sigstate (_hurd_sigthread),
-			      signo, 0, 0, reply_port, reply_port_type,
+			      signo, sigcode, 0, reply_port, reply_port_type,
 			      0); /* Stop if traced.  */
 
   return MIG_NO_REPLY;		/* Already replied.  */
@@ -1081,7 +1081,7 @@ kern_return_t
 _S_msg_sig_post_untraced (mach_port_t me,
 			  mach_port_t reply_port,
 			  mach_msg_type_name_t reply_port_type,
-			  int signo,
+			  int signo, natural_t sigcode,
 			  mach_port_t refport)
 {
   error_t err;
@@ -1092,7 +1092,7 @@ _S_msg_sig_post_untraced (mach_port_t me,
   /* Post the signal to the designated signal-receiving thread.  This will
      reply when the signal can be considered delivered.  */
   _hurd_internal_post_signal (_hurd_thread_sigstate (_hurd_sigthread),
-			      signo, 0, 0, reply_port, reply_port_type,
+			      signo, sigcode, 0, reply_port, reply_port_type,
 			      1); /* Untraced flag. */
 
   return MIG_NO_REPLY;		/* Already replied.  */
@@ -1170,7 +1170,7 @@ reauth_proc (mach_port_t new)
   if (! HURD_PORT_USE (&_hurd_ports[INIT_PORT_PROC],
 		       __proc_reauthenticate (port, ref,
 					      MACH_MSG_TYPE_MAKE_SEND) ||
-		       __auth_user_authenticate (new, port, ref,
+		       __auth_user_authenticate (new, ref,
 						 MACH_MSG_TYPE_MAKE_SEND,
 						 &ignore))
       && ignore != MACH_PORT_NULL)
diff --git a/hurd/path-lookup.c b/hurd/path-lookup.c
new file mode 100644
index 0000000000..9e0fff4927
--- /dev/null
+++ b/hurd/path-lookup.c
@@ -0,0 +1,120 @@
+/* Filename lookup using a search path
+
+   Copyright (C) 1995, 1996 Free Software Foundation, Inc.
+
+   Written by Miles Bader <miles@gnu.ai.mit.edu>
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   This program is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include <string.h>
+#include <hurd.h>
+#include <hurd/lookup.h>
+
+/* If FILE_NAME contains a '/', or PATH is NULL, call FUN with FILE_NAME, and
+   return the result (if PREFIXED_NAME is non-NULL, setting *PREFIXED_NAME to
+   NULL).  Otherwise, call FUN repeatedly with FILE_NAME prefixed with each
+   successive `:' separated element of PATH, returning whenever FUN returns
+   0 (if PREFIXED_NAME is non-NULL, setting *PREFIXED_NAME to the resulting
+   prefixed path).  If FUN never returns 0, return the first non-ENOENT
+   return value, or ENOENT if there is none.  */
+error_t
+file_name_path_scan (const char *file_name, const char *path,
+		     error_t (*fun)(const char *name),
+		     char **prefixed_name)
+{
+  if (path == NULL || index (file_name, '/'))
+    {
+      if (prefixed_name)
+	*prefixed_name = 0;
+      return (*fun)(file_name);
+    }
+  else
+    {
+      error_t real_err = 0;
+      size_t file_name_len = strlen (file_name);
+
+      for (;;)
+	{
+	  error_t err;
+	  const char *next = index (path, ':') ?: path + strlen (path);
+	  size_t pfx_len = next - path;
+	  char pfxed_name[pfx_len + 2 + file_name_len + 1];
+
+	  if (pfx_len == 0)
+	    pfxed_name[pfx_len++] = '.';
+	  else
+	    bcopy (path, pfxed_name, pfx_len);
+	  if (pfxed_name[pfx_len - 1] != '/')
+	    pfxed_name[pfx_len++] = '/';
+	  bcopy (file_name, pfxed_name + pfx_len, file_name_len + 1);
+
+	  err = (*fun)(pfxed_name);
+	  if (err == 0)
+	    {
+	      if (prefixed_name)
+		*prefixed_name = strdup (pfxed_name);
+	      return 0;
+	    }
+	  if (!real_err && err != ENOENT)
+	    real_err = err;
+
+	  if (*next == '\0')
+	    return real_err ?: ENOENT;
+	  else
+	    path = next + 1;
+	}
+    }
+}
+
+/* Lookup FILE_NAME and return the node opened with FLAGS & MODE in result
+   (see hurd_file_name_lookup for details), but a simple filename (without
+   any directory prefixes) will be consectutively prefixed with the pathnames
+   in the `:' separated list PATH until one succeeds in a successful lookup.
+   If none succeed, then the first error that wasn't ENOENT is returned, or
+   ENOENT if no other errors were returned.  If PREFIXED_NAME is non-NULL,
+   then if RESULT is looked up directly, *PREFIXED_NAME is set to NULL, and
+   if it is looked up using a prefix from PATH, *PREFIXED_NAME is set to
+   malloced storage containing the prefixed name.  */
+error_t
+hurd_file_name_path_lookup (error_t (*use_init_port)
+			    (int which,
+			     error_t (*operate) (mach_port_t)),
+			    file_t (*get_dtable_port) (int fd),
+			    const char *file_name, const char *path,
+			    int flags, mode_t mode,
+			    file_t *result, char **prefixed_name)
+{
+  error_t lookup (const char *name)
+    {
+      return
+	__hurd_file_name_lookup (use_init_port, get_dtable_port,
+				 name, flags, mode, result);
+    }
+  return file_name_path_scan (file_name, path, lookup, prefixed_name);
+}
+
+file_t
+file_name_path_lookup (const char *file_name, const char *path,
+		       int flags, mode_t mode, char **prefixed_name)
+{
+  error_t err;
+  file_t result;
+
+  err = hurd_file_name_path_lookup (&_hurd_ports_use, &__getdport,
+				    file_name, path, flags, mode,
+				    &result, prefixed_name);
+
+  return err ? (__hurd_fail (err), MACH_PORT_NULL) : result;
+}
diff --git a/hurd/setauth.c b/hurd/setauth.c
index 34ce7f63bb..3591968978 100644
--- a/hurd/setauth.c
+++ b/hurd/setauth.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
+/* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996 Free Software Foundation, Inc.
 This file is part of the GNU C Library.
 
 The GNU C Library is free software; you can redistribute it and/or
@@ -73,7 +73,6 @@ _hurd_setauth (auth_t new)
 	      ! HURD_PORT_USE (&_hurd_ports[INIT_PORT_AUTH],
 			       __auth_user_authenticate
 			       (port,
-				_hurd_init_dtable[d],
 				ref, MACH_MSG_TYPE_MAKE_SEND,
 				&new)))
 	    {
@@ -88,7 +87,7 @@ _hurd_setauth (auth_t new)
   if (__USEPORT (CRDIR,
 		 ! __io_reauthenticate (port,
 					ref, MACH_MSG_TYPE_MAKE_SEND) &&
-		 ! __auth_user_authenticate (new, port,
+		 ! __auth_user_authenticate (new,
 					     ref, MACH_MSG_TYPE_MAKE_SEND,
 					     &newport)))
     _hurd_port_set (&_hurd_ports[INIT_PORT_CRDIR], newport);
@@ -98,7 +97,7 @@ _hurd_setauth (auth_t new)
   if (__USEPORT (CWDIR,
 		 ! __io_reauthenticate (port,
 					ref, MACH_MSG_TYPE_MAKE_SEND) &&
-		 ! __auth_user_authenticate (new, port,
+		 ! __auth_user_authenticate (new,
 					     ref, MACH_MSG_TYPE_MAKE_SEND,
 					     &newport)))
     _hurd_port_set (&_hurd_ports[INIT_PORT_CWDIR], newport);
diff --git a/hurd/sigunwind.c b/hurd/sigunwind.c
index f6d29e1ab0..28c0d941b5 100644
--- a/hurd/sigunwind.c
+++ b/hurd/sigunwind.c
@@ -56,7 +56,7 @@ _hurdsig_longjmp_from_handler (void *data, jmp_buf env, int val)
   __spin_lock (&ss->lock);
   /* We should only ever be called from _longjmp_unwind (in jmp-unwind.c),
      which calls us inside a critical section.  */
-  assert (ss->critical_section);
+  assert (__spin_lock_locked (&ss->critical_section_lock));
   /* Are we on the alternate signal stack now?  */
   onstack = (ss->sigaltstack.ss_flags & SA_ONSTACK);
   __spin_unlock (&ss->lock);
@@ -122,7 +122,7 @@ _hurdsig_longjmp_from_handler (void *data, jmp_buf env, int val)
 	 having run all the unwind forms back to ENV's frame, but our SP is
 	 still inside those unwound frames.  */
       __spin_lock (&ss->lock);
-      ss->critical_section = 0;
+      __spin_unlock (&ss->critical_section_lock);
       ss->blocked = ~(sigset_t) 0 & ~_SIG_CANT_MASK;
       __spin_unlock (&ss->lock);
 
diff --git a/hurd/thread-cancel.c b/hurd/thread-cancel.c
index 81828457d5..85ba010407 100644
--- a/hurd/thread-cancel.c
+++ b/hurd/thread-cancel.c
@@ -1,5 +1,5 @@
 /* Thread cancellation support.
-Copyright (C) 1995 Free Software Foundation, Inc.
+Copyright (C) 1995, 1996 Free Software Foundation, Inc.
 This file is part of the GNU C Library.
 
 The GNU C Library is free software; you can redistribute it and/or
@@ -25,7 +25,7 @@ Cambridge, MA 02139, USA.  */
 
 /* See hurdsig.c.  */
 extern mach_port_t _hurdsig_abort_rpcs (struct hurd_sigstate *ss,
-					int signo, int sigthread, 
+					int signo, int sigthread,
 					struct machine_thread_all_state *,
 					int *state_change,
 					mach_port_t *reply_port,
@@ -45,9 +45,9 @@ hurd_thread_cancel (thread_t thread)
   if (ss == _hurd_self_sigstate ())
     return EINTR;		/* Bozo.  */
 
+  assert (! __spin_lock_locked (&ss->critical_section_lock));
+  __spin_lock (&ss->critical_section_lock);
   __spin_lock (&ss->lock);
-  assert (! ss->critical_section);
-  ss->critical_section = 1;
   err = __thread_suspend (thread);
   __spin_unlock (&ss->lock);
 
@@ -59,7 +59,7 @@ hurd_thread_cancel (thread_t thread)
       /* Interrupt any interruptible RPC now in progress.  */
       state.set = 0;
       _hurdsig_abort_rpcs (ss, 0, 0, &state, &state_change, NULL, 0, 0);
-      if (state_change) 
+      if (state_change)
 	err = __thread_set_state (thread, MACHINE_THREAD_STATE_FLAVOR,
 				  (natural_t *) &state.basic,
 				  MACHINE_THREAD_STATE_COUNT);
@@ -85,7 +85,7 @@ hurd_check_cancel (void)
   int cancel;
 
   __spin_lock (&ss->lock);
-  assert (! ss->critical_section);
+  assert (! __spin_lock_locked (&ss->critical_section_lock));
   cancel = ss->cancel;
   ss->cancel = 0;
   __spin_unlock (&ss->lock);