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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 1997-2003 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <string.h> 30 #include <limits.h> 31 #include <sys/types.h> 32 #include <sys/stat.h> 33 #include "Pcontrol.h" 34 35 /* 36 * Return TRUE iff dir is the /proc directory. 37 */ 38 int 39 Pisprocdir(struct ps_prochandle *Pr, const char *dir) 40 { 41 char path[PATH_MAX]; 42 struct stat statb; 43 struct statvfs statvfsb; 44 45 if (*dir == '/') 46 (void) snprintf(path, sizeof (path), "/proc/%d/root%s", 47 (int)Pr->pid, dir); 48 else 49 (void) snprintf(path, sizeof (path), "/proc/%d/cwd/%s", 50 (int)Pr->pid, dir); 51 52 /* 53 * We can't compare the statb.st_fstype string to "proc" because 54 * a loop-back mount of /proc would show "lofs" instead of "proc". 55 * Instead we use the statvfs() f_basetype string. 56 */ 57 return (stat(path, &statb) == 0 && 58 statvfs(path, &statvfsb) == 0 && 59 (statb.st_mode & S_IFMT) == S_IFDIR && 60 statb.st_ino == 2 && 61 strcmp(statvfsb.f_basetype, "proc") == 0); 62 } 63