[Libsysio-commit] RedStorm: libsysio/src access.c Makefile.am

[Lee W. <lw...@us...>]

Update of /cvsroot/libsysio/libsysio/src
In directory sc8-pr-cvs1:/tmp/cvs-serv29917/src

Modified Files:
      Tag: RedStorm
	Makefile.am 
Added Files:
      Tag: RedStorm
	access.c 
Log Message:


Merged access(2) addition from the HEAD.


--- NEW FILE ---
/*
 *    This Cplant(TM) source code is the property of Sandia National
 *    Laboratories.
 *
 *    This Cplant(TM) source code is copyrighted by Sandia National
 *    Laboratories.
 *
 *    The redistribution of this Cplant(TM) source code is subject to the
 *    terms of the GNU Lesser General Public License
 *    (see cit/LGPL or http://www.gnu.org/licenses/lgpl.html)
 *
 *    Cplant(TM) Copyright 1998-2003 Sandia Corporation. 
 *    Under the terms of Contract DE-AC04-94AL85000, there is a non-exclusive
 *    license for use of this work by or on behalf of the US Government.
 *    Export of this program may require a license from the United States
 *    Government.
 */

/*
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * Questions or comments about this library should be sent to:
 *
 * Lee Ward
 * Sandia National Laboratories, New Mexico
 * P.O. Box 5800
 * Albuquerque, NM 87185-1110
 *
 * le...@sa...
 */

#include <stdlib.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>

int
access(const char *path, int amode)
{
	gid_t	*list, *entry;
	size_t	n;
	int	err;
	unsigned mask, mode;
	struct stat stbuf;
	int	oerrno;

	err = 0;

	n = getgroups(0, NULL);
	list = NULL;
	if (n) {
		list = malloc(n * sizeof(gid_t));
		if (!list) {
			err = -1;
			goto out;
		}
	}
	err = getgroups(n, list);
	if (err)
		goto out;

	err = stat(path, &stbuf);
	if (err)
		goto out;

	mask = 0;
	if (amode & R_OK)
		mask |= S_IRUSR;
	if (amode & W_OK)
		mask |= S_IWUSR;
	if (amode & X_OK)
		mask |= S_IXUSR;

	mode = stbuf.st_mode;
	if (stbuf.st_uid == getuid() && (mode & mask) != mask) {
		err = -1;
		goto out;
	}
	mask >>= 3;
	entry = list;
	while (n--) {
		if (stbuf.st_gid == *entry++) {
			if ((mode & mask) != mask) {
				err = -1;
				goto out;
			}
			break;
		}
	}
	if (stbuf.st_gid == getgid() && (mode & mask) != mask) {
		err = -1;
		goto out;
	}
	mask >>= 3;
	if ((mode & mask) != mask) {
		err = -1;
		goto out;
	}

out:
	oerrno = errno;
	if (list)
		free(list);
	errno = oerrno;

	return err;
}

Index: Makefile.am
===================================================================
RCS file: /cvsroot/libsysio/libsysio/src/Makefile.am,v
retrieving revision 1.5.6.1
retrieving revision 1.5.6.2
diff -u -w -b -B -p -r1.5.6.1 -r1.5.6.2
--- Makefile.am	12 May 2003 11:48:45 -0000	1.5.6.1
+++ Makefile.am	29 Jul 2003 20:17:22 -0000	1.5.6.2
@@ -4,5 +4,6 @@ libsysio_a_SOURCES = chdir.c chmod.c cho
 	fsync.c getdirentries.c init.c inode.c ioctl.c ioctx.c iowait.c \
 	lseek.c mkdir.c mknod.c mount.c namei.c open.c read.c rmdir.c stat.c \
 	stat64.c symlink.c truncate.c unlink.c write.c
+	stat64.c symlink.c truncate.c unlink.c write.c access.c
 
 include $(top_srcdir)/Rules.make