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