Home | History | Annotate | Download | only in common
      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License (the "License").
      6  * You may not use this file except in compliance with the License.
      7  *
      8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      9  * or http://www.opensolaris.org/os/licensing.
     10  * See the License for the specific language governing permissions
     11  * and limitations under the License.
     12  *
     13  * When distributing Covered Code, include this CDDL HEADER in each
     14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     15  * If applicable, add the following below this CDDL HEADER, with the
     16  * fields enclosed by brackets "[]" replaced with your own identifying
     17  * information: Portions Copyright [yyyy] [name of copyright owner]
     18  *
     19  * CDDL HEADER END
     20  */
     21 /*
     22  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
     23  * Use is subject to license terms.
     24  */
     25 
     26 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     27 
     28 #include <string.h>
     29 #include <limits.h>
     30 #include <sys/types.h>
     31 #include <sys/stat.h>
     32 #include "Pcontrol.h"
     33 
     34 /*
     35  * Return TRUE iff dir is the /proc directory.
     36  */
     37 int
     38 Pisprocdir(struct ps_prochandle *Pr, const char *dir)
     39 {
     40 	char path[PATH_MAX];
     41 	struct stat statb;
     42 	struct statvfs statvfsb;
     43 
     44 	if (*dir == '/')
     45 		(void) snprintf(path, sizeof (path), "%s/%d/root%s",
     46 		    procfs_path, (int)Pr->pid, dir);
     47 	else
     48 		(void) snprintf(path, sizeof (path), "%s/%d/cwd/%s",
     49 		    procfs_path, (int)Pr->pid, dir);
     50 
     51 	/*
     52 	 * We can't compare the statb.st_fstype string to "proc" because
     53 	 * a loop-back mount of /proc would show "lofs" instead of "proc".
     54 	 * Instead we use the statvfs() f_basetype string.
     55 	 */
     56 	return (stat(path, &statb) == 0 &&
     57 	    statvfs(path, &statvfsb) == 0 &&
     58 	    (statb.st_mode & S_IFMT) == S_IFDIR &&
     59 	    statb.st_ino == 2 &&
     60 	    strcmp(statvfsb.f_basetype, "proc") == 0);
     61 }
     62