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 #include <string.h> 27 #include <limits.h> 28 #include <sys/types.h> 29 #include <sys/stat.h> 30 #include "Pcontrol.h" 31 32 /* 33 * Return TRUE iff dir is the /proc directory. 34 */ 35 int 36 Pisprocdir(struct ps_prochandle *Pr, const char *dir) 37 { 38 char path[PATH_MAX]; 39 struct stat statb; 40 struct statvfs statvfsb; 41 42 if (*dir == '/') 43 (void) snprintf(path, sizeof (path), "%s/%d/root%s", 44 procfs_path, (int)Pr->pid, dir); 45 else 46 (void) snprintf(path, sizeof (path), "%s/%d/cwd/%s", 47 procfs_path, (int)Pr->pid, dir); 48 49 /* 50 * We can't compare the statb.st_fstype string to "proc" because 51 * a loop-back mount of /proc would show "lofs" instead of "proc". 52 * Instead we use the statvfs() f_basetype string. 53 */ 54 return (stat(path, &statb) == 0 && 55 statvfs(path, &statvfsb) == 0 && 56 (statb.st_mode & S_IFMT) == S_IFDIR && 57 statb.st_ino == 2 && 58 strcmp(statvfsb.f_basetype, "proc") == 0); 59 } 60