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 2004 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 /* Copyright (c) 1988 AT&T */ 30 /* All Rights Reserved */ 31 32 33 #pragma weak getvfsspec = _getvfsspec 34 #pragma weak getvfsfile = _getvfsfile 35 #pragma weak getvfsany = _getvfsany 36 #pragma weak getvfsent = _getvfsent 37 38 #include "synonyms.h" 39 #include <mtlib.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <errno.h> 43 #include <sys/types.h> 44 #include <sys/stat.h> 45 #include <sys/vfstab.h> 46 #include <string.h> 47 #include <thread.h> 48 #include <synch.h> 49 #include <strings.h> 50 #include <libc.h> 51 #include "tsd.h" 52 53 54 #define GETTOK_R(xx, ll, tmp)\ 55 if ((vp->xx = (char *)strtok_r(ll, sepstr, tmp)) == NULL)\ 56 return (VFS_TOOFEW);\ 57 if (strcmp(vp->xx, dash) == 0)\ 58 vp->xx = NULL 59 #define GETTOK(xx, ll)\ 60 if ((vp->xx = strtok(ll, sepstr)) == NULL)\ 61 return (VFS_TOOFEW);\ 62 if (strcmp(vp->xx, dash) == 0)\ 63 vp->xx = NULL 64 #define DIFF(xx)\ 65 (vrefp->xx != NULL && (vgetp->xx == NULL ||\ 66 strcmp(vrefp->xx, vgetp->xx) != 0)) 67 #define SDIFF(xx, typem, typer)\ 68 (vgetp->xx == NULL || stat64(vgetp->xx, &statb) == -1 ||\ 69 (statb.st_mode & S_IFMT) != typem ||\ 70 statb.st_rdev != typer) 71 72 static const char sepstr[] = " \t\n"; 73 static const char dash[] = "-"; 74 75 static int getline(char *, FILE *); 76 77 int 78 getvfsspec(FILE *fd, struct vfstab *vgetp, char *special) 79 { 80 int ret, bstat; 81 mode_t bmode; 82 dev_t brdev; 83 struct stat64 statb; 84 85 86 if (special && stat64(special, &statb) == 0 && 87 ((bmode = (statb.st_mode & S_IFMT)) == S_IFBLK || 88 bmode == S_IFCHR)) { 89 bstat = 1; 90 brdev = statb.st_rdev; 91 } else 92 bstat = 0; 93 94 while ((ret = getvfsent(fd, vgetp)) == 0 && 95 ((bstat == 0 && 96 (special != NULL && (vgetp->vfs_special == NULL || 97 strcmp(special, vgetp->vfs_special) != 0))) || 98 (bstat == 1 && 99 (vgetp->vfs_special == NULL || 100 stat64(vgetp->vfs_special, &statb) == -1 || 101 (statb.st_mode & S_IFMT) != bmode || 102 statb.st_rdev != brdev)))) 103 ; 104 return (ret); 105 } 106 107 int 108 getvfsfile(FILE *fd, struct vfstab *vp, char *mountp) 109 { 110 struct vfstab vv; 111 112 bzero(&vv, (size_t)sizeof (vv)); 113 vv.vfs_mountp = mountp; 114 return (getvfsany(fd, vp, &vv)); 115 } 116 117 int 118 getvfsany(FILE *fd, struct vfstab *vgetp, struct vfstab *vrefp) 119 { 120 int ret, bstat, cstat; 121 mode_t bmode, cmode; 122 dev_t brdev, crdev; 123 struct stat64 statb; 124 off64_t start = ftello64(fd); 125 126 /* Match by straight strcmp */ 127 while ((ret = getvfsent(fd, vgetp)) == 0 && 128 (DIFF(vfs_special) || DIFF(vfs_fsckdev) || 129 DIFF(vfs_mountp) || 130 DIFF(vfs_fstype) || 131 DIFF(vfs_fsckpass) || 132 DIFF(vfs_automnt) || 133 DIFF(vfs_mntopts))) 134 ; 135 136 /* If something other than EOF, return it */ 137 if (ret != -1) 138 return (ret); 139 140 /* 141 * Go back to the original location in the file and try to 142 * match the devices by doing stat's (retains compatibility 143 * with original getvfsany). 144 */ 145 (void) fseeko64(fd, start, SEEK_SET); 146 147 if (vrefp->vfs_special && stat64(vrefp->vfs_special, &statb) == 0 && 148 ((bmode = (statb.st_mode & S_IFMT)) == S_IFBLK || 149 bmode == S_IFCHR)) { 150 bstat = 1; 151 brdev = statb.st_rdev; 152 } else 153 bstat = 0; 154 155 if (vrefp->vfs_fsckdev && stat64(vrefp->vfs_fsckdev, &statb) == 0 && 156 ((cmode = (statb.st_mode & S_IFMT)) == S_IFBLK || 157 cmode == S_IFCHR)) { 158 cstat = 1; 159 crdev = statb.st_rdev; 160 } else 161 cstat = 0; 162 163 while ((ret = getvfsent(fd, vgetp)) == 0 && 164 ((bstat == 0 && DIFF(vfs_special)) || 165 (bstat == 1 && SDIFF(vfs_special, bmode, brdev)) || 166 (cstat == 0 && DIFF(vfs_fsckdev)) || 167 (cstat == 1 && SDIFF(vfs_fsckdev, cmode, crdev)) || 168 DIFF(vfs_mountp) || 169 DIFF(vfs_fstype) || 170 DIFF(vfs_fsckpass) || 171 DIFF(vfs_automnt) || 172 DIFF(vfs_mntopts))) 173 ; 174 return (ret); 175 } 176 177 int 178 getvfsent(FILE *fd, struct vfstab *vp) 179 { 180 int ret; 181 char *tmp, *line; 182 183 line = tsdalloc(_T_GETVFSENT, VFS_LINE_MAX, NULL); 184 if (line == NULL) 185 return (0); 186 187 /* skip leading spaces and comments */ 188 if ((ret = getline(line, fd)) != 0) 189 return (ret); 190 191 /* split up each field */ 192 GETTOK_R(vfs_special, line, &tmp); 193 GETTOK_R(vfs_fsckdev, NULL, &tmp); 194 GETTOK_R(vfs_mountp, NULL, &tmp); 195 GETTOK_R(vfs_fstype, NULL, &tmp); 196 GETTOK_R(vfs_fsckpass, NULL, &tmp); 197 GETTOK_R(vfs_automnt, NULL, &tmp); 198 GETTOK_R(vfs_mntopts, NULL, &tmp); 199 200 /* check for too many fields */ 201 if (strtok_r(NULL, sepstr, &tmp) != NULL) 202 return (VFS_TOOMANY); 203 204 return (0); 205 } 206 207 static int 208 getline(char *lp, FILE *fd) 209 { 210 char *cp; 211 212 while ((lp = fgets(lp, VFS_LINE_MAX, fd)) != NULL) { 213 if (strlen(lp) == VFS_LINE_MAX-1 && lp[VFS_LINE_MAX-2] != '\n') 214 return (VFS_TOOLONG); 215 216 for (cp = lp; *cp == ' ' || *cp == '\t'; cp++) 217 ; 218 219 if (*cp != '#' && *cp != '\n') 220 return (0); 221 } 222 return (-1); 223 } 224