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.

1 files changed, 120 insertions, 0 deletions

diff --git a/hurd/path-lookup.c b/hurd/path-lookup.c
new file mode 100644
index 0000000..9e0fff4
--- /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;
+}