Tue Oct 31 00:07:29 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>cvs/libc-951031

	* sysdeps/mach/hurd/group_member.c: New file.
	* sysdeps/generic/group_member.c: New file.

	* Makerules (lib-noranlib): Don't depend on $(install-lib).
	(others): Do.
	* extra-lib.mk: Fix test of $(lib)-no-lib-dep.

Mon Oct 30 12:33:10 1995  Roland McGrath  <roland@churchy.gnu.ai.mit.edu>

	* Rules (others): Depend on $(extra-objs).

	* posix/unistd.h [__USE_GNU]: Declare group_member, __group_member.
	* posix/Makefile (routines): Add group_member.

	* sysdeps/posix/euidaccess.c: New file, adapted from fileutils.

	* sysdeps/unix/sysv/linux/i386/sigaction.c: Tighten constraint for
	SIG operand in asm so it must be a register.
	Add dead return to quiet gcc warning.

	* Makerules (sysd-rules): Write a defn for sysd-rules-done.
	[! sysd-rules-done]: Inhibit deps.

1 files changed, 50 insertions, 0 deletions

diff --git a/sysdeps/generic/group_member.c b/sysdeps/generic/group_member.c
new file mode 100644
index 0000000..31d2e87
--- /dev/null
+++ b/sysdeps/generic/group_member.c
@@ -0,0 +1,50 @@
+/* `group_member' -- test if process is in a given group.
+Copyright (C) 1995 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 <sys/types.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <limits.h>
+
+#ifndef NGROUPS_MAX
+#define NGROUPS_MAX	16	/* First guess.  */
+#endif
+
+int
+__group_member (gid)
+     gid_t gid;
+{
+  int n, size;
+  gid_t *groups;
+
+  size = NGROUPS_MAX;
+  do
+    {
+      groups = __alloca (size * sizeof *groups);
+      n = __getgroups (size, groups);
+      size *= 2;
+    } while (n == size / 2);
+
+  while (n > 0)
+    if (groups[n--] == gid)
+      return 1;
+
+  return 0;
+}
+weak_alias (__group_member, group_member)