entered into RCS

diff --git a/sysdeps/unix/bsd/sequent/i386/getgroups.S b/sysdeps/unix/bsd/sequent/i386/getgroups.S
new file mode 100644 (file)
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+++ b/sysdeps/unix/bsd/sequent/i386/getgroups.S
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+/* Copyright (C) 1994 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
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <sysdep.h>
+#include <limits.h>
+
+/* Dynix erroneously reports `getgroups (0, 0)' as an error.
+   We fix up for that case.  */
+
+#define syscall_error myerror
+SYSCALL__ (getgroups, 2)
+#undef syscall_error
+       ret
+myerror:
+       tstl 4(%esp)            /* Was the first arg 0?  */
+       jnz syscall_error       /* If not, go to the normal error case.  */
+       /* When called with (0, 0), we want to return the number of groups
+          without storing anything.  The Dynix system call gives an error
+          for this case, so we fix up by calling it with a local array we
+          never use, and just use the return value.  */
+       subl %esp, $(NGROUPS_MAX * 4) /* Allocate a local array.  */
+       movl $NGROUPS_MAX, %ecx /* Pass NGROUPS_MAX for first arg.  */
+       movl %esp, %edx         /* Pass local array for second arg.  */
+       DO_CALL (getgroups, 2)  /* Do the system call.  */
+       addl %esp, $(NGROUPS_MAX * 4) /* Pop the local array.  */
+       jb syscall_error        /* Check for error from the system call.  */
+       ret                     /* Return its value.  */