1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 28*0Sstevel@tonic-gate /* All Rights Reserved */ 29*0Sstevel@tonic-gate 30*0Sstevel@tonic-gate /* 31*0Sstevel@tonic-gate * Portions of this source code were derived from Berkeley 4.3 BSD 32*0Sstevel@tonic-gate * under license from the Regents of the University of California. 33*0Sstevel@tonic-gate */ 34*0Sstevel@tonic-gate 35*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 36*0Sstevel@tonic-gate 37*0Sstevel@tonic-gate #include <sys/types.h> 38*0Sstevel@tonic-gate #include <sys/param.h> 39*0Sstevel@tonic-gate #include <sys/errno.h> 40*0Sstevel@tonic-gate #include <pathname.h> 41*0Sstevel@tonic-gate #include <sys/promif.h> 42*0Sstevel@tonic-gate #include <sys/salib.h> 43*0Sstevel@tonic-gate #include <sys/bootdebug.h> 44*0Sstevel@tonic-gate 45*0Sstevel@tonic-gate /* 46*0Sstevel@tonic-gate * Pathname utilities. 47*0Sstevel@tonic-gate * 48*0Sstevel@tonic-gate * In translating file names we copy each argument file 49*0Sstevel@tonic-gate * name into a pathname structure where we operate on it. 50*0Sstevel@tonic-gate * Each pathname structure can hold MAXPATHLEN characters 51*0Sstevel@tonic-gate * including a terminating null, and operations here support 52*0Sstevel@tonic-gate * fetching strings from user space, getting the next character from 53*0Sstevel@tonic-gate * a pathname, combining two pathnames (used in symbolic 54*0Sstevel@tonic-gate * link processing), and peeling off the first component 55*0Sstevel@tonic-gate * of a pathname. 56*0Sstevel@tonic-gate */ 57*0Sstevel@tonic-gate 58*0Sstevel@tonic-gate #define dprintf if (boothowto & RB_DEBUG) printf 59*0Sstevel@tonic-gate 60*0Sstevel@tonic-gate /* 61*0Sstevel@tonic-gate * Setup contents of pathname structure. Warn about missing allocations. 62*0Sstevel@tonic-gate * Structure itself is typically automatic 63*0Sstevel@tonic-gate * variable in calling routine for convenience. 64*0Sstevel@tonic-gate * 65*0Sstevel@tonic-gate * NOTE: if buf is NULL, failure occurs. 66*0Sstevel@tonic-gate */ 67*0Sstevel@tonic-gate int 68*0Sstevel@tonic-gate pn_alloc(struct pathname *pnp) 69*0Sstevel@tonic-gate { 70*0Sstevel@tonic-gate if (pnp->pn_buf == NULL) 71*0Sstevel@tonic-gate return (-1); 72*0Sstevel@tonic-gate pnp->pn_path = (char *)pnp->pn_buf; 73*0Sstevel@tonic-gate pnp->pn_pathlen = 0; 74*0Sstevel@tonic-gate return (0); 75*0Sstevel@tonic-gate } 76*0Sstevel@tonic-gate 77*0Sstevel@tonic-gate /* 78*0Sstevel@tonic-gate * Pull a pathname from user user or kernel space 79*0Sstevel@tonic-gate */ 80*0Sstevel@tonic-gate int 81*0Sstevel@tonic-gate pn_get(char *str, struct pathname *pnp) 82*0Sstevel@tonic-gate { 83*0Sstevel@tonic-gate if (pn_alloc(pnp) != 0) 84*0Sstevel@tonic-gate return (-1); 85*0Sstevel@tonic-gate bcopy(str, pnp->pn_path, strlen(str)); 86*0Sstevel@tonic-gate pnp->pn_pathlen = strlen(str); /* don't count null byte */ 87*0Sstevel@tonic-gate return (0); 88*0Sstevel@tonic-gate } 89*0Sstevel@tonic-gate 90*0Sstevel@tonic-gate /* 91*0Sstevel@tonic-gate * Set pathname to argument string. 92*0Sstevel@tonic-gate */ 93*0Sstevel@tonic-gate int 94*0Sstevel@tonic-gate pn_set(struct pathname *pnp, char *path) 95*0Sstevel@tonic-gate { 96*0Sstevel@tonic-gate pnp->pn_path = pnp->pn_buf; 97*0Sstevel@tonic-gate pnp->pn_pathlen = strlen(pnp->pn_path); /* don't count null byte */ 98*0Sstevel@tonic-gate bcopy(pnp->pn_path, path, pnp->pn_pathlen); 99*0Sstevel@tonic-gate return (0); 100*0Sstevel@tonic-gate } 101*0Sstevel@tonic-gate 102*0Sstevel@tonic-gate /* 103*0Sstevel@tonic-gate * Combine two argument pathnames by putting 104*0Sstevel@tonic-gate * second argument before first in first's buffer, 105*0Sstevel@tonic-gate * and freeing second argument. 106*0Sstevel@tonic-gate * This isn't very general: it is designed specifically 107*0Sstevel@tonic-gate * for symbolic link processing. 108*0Sstevel@tonic-gate */ 109*0Sstevel@tonic-gate int 110*0Sstevel@tonic-gate pn_combine(struct pathname *pnp, struct pathname *sympnp) 111*0Sstevel@tonic-gate { 112*0Sstevel@tonic-gate 113*0Sstevel@tonic-gate if (pnp->pn_pathlen + sympnp->pn_pathlen >= MAXPATHLEN) 114*0Sstevel@tonic-gate return (ENAMETOOLONG); 115*0Sstevel@tonic-gate bcopy(pnp->pn_path, pnp->pn_buf + sympnp->pn_pathlen, 116*0Sstevel@tonic-gate (uint_t)pnp->pn_pathlen); 117*0Sstevel@tonic-gate bcopy(sympnp->pn_path, pnp->pn_buf, (uint_t)sympnp->pn_pathlen); 118*0Sstevel@tonic-gate pnp->pn_pathlen += sympnp->pn_pathlen; 119*0Sstevel@tonic-gate pnp->pn_buf[pnp->pn_pathlen] = '\0'; 120*0Sstevel@tonic-gate pnp->pn_path = pnp->pn_buf; 121*0Sstevel@tonic-gate return (0); 122*0Sstevel@tonic-gate } 123*0Sstevel@tonic-gate 124*0Sstevel@tonic-gate /* 125*0Sstevel@tonic-gate * Get next component off a pathname and leave in 126*0Sstevel@tonic-gate * buffer comoponent which should have room for 127*0Sstevel@tonic-gate * NFS_MAXNAMLEN (1024) bytes and a null terminator character. 128*0Sstevel@tonic-gate * If PEEK is set in flags, just peek at the component, 129*0Sstevel@tonic-gate * i.e., don't strip it out of pnp. 130*0Sstevel@tonic-gate */ 131*0Sstevel@tonic-gate int 132*0Sstevel@tonic-gate pn_getcomponent(struct pathname *pnp, char *component, int flags) 133*0Sstevel@tonic-gate { 134*0Sstevel@tonic-gate char *cp; 135*0Sstevel@tonic-gate int l; 136*0Sstevel@tonic-gate int n; 137*0Sstevel@tonic-gate 138*0Sstevel@tonic-gate cp = pnp->pn_path; 139*0Sstevel@tonic-gate l = pnp->pn_pathlen; 140*0Sstevel@tonic-gate n = 1024; 141*0Sstevel@tonic-gate while ((l > 0) && (*cp != '/')) { 142*0Sstevel@tonic-gate if (--n < 0) 143*0Sstevel@tonic-gate return (ENAMETOOLONG); 144*0Sstevel@tonic-gate *component++ = *cp++; 145*0Sstevel@tonic-gate --l; 146*0Sstevel@tonic-gate } 147*0Sstevel@tonic-gate if (!(flags & PN_PEEK)) { 148*0Sstevel@tonic-gate pnp->pn_path = cp; 149*0Sstevel@tonic-gate pnp->pn_pathlen = l; 150*0Sstevel@tonic-gate } 151*0Sstevel@tonic-gate *component = 0; 152*0Sstevel@tonic-gate return (0); 153*0Sstevel@tonic-gate } 154*0Sstevel@tonic-gate 155*0Sstevel@tonic-gate /* 156*0Sstevel@tonic-gate * skip over consecutive slashes in the pathname 157*0Sstevel@tonic-gate */ 158*0Sstevel@tonic-gate void 159*0Sstevel@tonic-gate pn_skipslash(struct pathname *pnp) 160*0Sstevel@tonic-gate { 161*0Sstevel@tonic-gate while ((pnp->pn_pathlen != 0) && (*pnp->pn_path == '/')) { 162*0Sstevel@tonic-gate pnp->pn_path++; 163*0Sstevel@tonic-gate pnp->pn_pathlen--; 164*0Sstevel@tonic-gate } 165*0Sstevel@tonic-gate } 166*0Sstevel@tonic-gate 167*0Sstevel@tonic-gate /* 168*0Sstevel@tonic-gate * free pathname resources. This is a nop - the user of these 169*0Sstevel@tonic-gate * routines is responsible for allocating and freeing their memory. 170*0Sstevel@tonic-gate */ 171*0Sstevel@tonic-gate /*ARGSUSED*/ 172*0Sstevel@tonic-gate void 173*0Sstevel@tonic-gate pn_free(struct pathname *pnp) 174*0Sstevel@tonic-gate { 175*0Sstevel@tonic-gate /* nop */ 176*0Sstevel@tonic-gate dprintf("pn_free(): you shouldn't be calling pn_free()!\n"); 177*0Sstevel@tonic-gate } 178