1 /*- 2 * Copyright (c) 2016 The DragonFly Project 3 * Copyright (c) 2014 The FreeBSD Foundation 4 * All rights reserved. 5 * 6 * This software was developed by Edward Tomasz Napierala under sponsorship 7 * from the FreeBSD Foundation. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 */ 31 32 #include <sys/param.h> 33 #include <sys/diskslice.h> 34 #include <sys/ioctl.h> 35 #include <sys/stat.h> 36 #include <err.h> 37 #include <errno.h> 38 #include <iconv.h> 39 #include <locale.h> 40 #include <stdbool.h> 41 #include <stddef.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include <unistd.h> 46 #include <vis.h> 47 48 #include "fstyp.h" 49 50 #define LABEL_LEN 512 51 52 bool show_label = false; 53 54 typedef int (*fstyp_function)(FILE *, char *, size_t, const char *); 55 typedef int (*fsvtyp_function)(const char *, char *, size_t); 56 57 static struct { 58 const char *name; 59 fstyp_function function; 60 bool unmountable; 61 const char *precache_encoding; 62 } fstypes[] = { 63 { "apfs", &fstyp_apfs, true, NULL }, 64 { "cd9660", &fstyp_cd9660, false, NULL }, 65 { "exfat", &fstyp_exfat, false, EXFAT_ENC }, 66 { "ext2fs", &fstyp_ext2fs, false, NULL }, 67 { "hfs+", &fstyp_hfsp, false, NULL }, 68 { "msdosfs", &fstyp_msdosfs, false, NULL }, 69 { "ntfs", &fstyp_ntfs, false, NTFS_ENC }, 70 { "ufs", &fstyp_ufs, false, NULL }, 71 { "hammer", &fstyp_hammer, false, NULL }, 72 { "hammer2", &fstyp_hammer2, false, NULL }, 73 { NULL, NULL, NULL, NULL } 74 }; 75 76 static struct { 77 const char *name; 78 fsvtyp_function function; 79 bool unmountable; 80 const char *precache_encoding; 81 } fsvtypes[] = { 82 { "hammer", &fsvtyp_hammer, false, NULL }, /* Must be before partial */ 83 { "hammer(partial)", &fsvtyp_hammer_partial, true, NULL }, 84 { NULL, NULL, NULL, NULL } 85 }; 86 87 void * 88 read_buf(FILE *fp, off_t off, size_t len) 89 { 90 int error; 91 size_t nread; 92 void *buf; 93 94 error = fseek(fp, off, SEEK_SET); 95 if (error != 0) { 96 warn("cannot seek to %jd", (uintmax_t)off); 97 return (NULL); 98 } 99 100 buf = malloc(len); 101 if (buf == NULL) { 102 warn("cannot malloc %zd bytes of memory", len); 103 return (NULL); 104 } 105 106 nread = fread(buf, len, 1, fp); 107 if (nread != 1) { 108 free(buf); 109 if (feof(fp) == 0) 110 warn("fread"); 111 return (NULL); 112 } 113 114 return (buf); 115 } 116 117 char * 118 checked_strdup(const char *s) 119 { 120 char *c; 121 122 c = strdup(s); 123 if (c == NULL) 124 err(1, "strdup"); 125 return (c); 126 } 127 128 void 129 rtrim(char *label, size_t size) 130 { 131 ptrdiff_t i; 132 133 for (i = size - 1; i >= 0; i--) { 134 if (label[i] == '\0') 135 continue; 136 else if (label[i] == ' ') 137 label[i] = '\0'; 138 else 139 break; 140 } 141 } 142 143 static void 144 usage(void) 145 { 146 147 fprintf(stderr, "usage: fstyp [-l] [-s] [-u] special\n"); 148 exit(1); 149 } 150 151 static void 152 type_check(const char *path, FILE *fp) 153 { 154 int error, fd; 155 struct stat sb; 156 struct partinfo pinfo; 157 158 fd = fileno(fp); 159 160 error = fstat(fd, &sb); 161 if (error != 0) 162 err(1, "%s: fstat", path); 163 164 if (S_ISREG(sb.st_mode)) 165 return; 166 167 error = ioctl(fd, DIOCGPART, &pinfo); 168 if (error != 0) 169 errx(1, "%s: not a disk", path); 170 } 171 172 int 173 main(int argc, char **argv) 174 { 175 int ch, error, i, nbytes; 176 bool ignore_type = false, show_unmountable = false; 177 char label[LABEL_LEN + 1], strvised[LABEL_LEN * 4 + 1]; 178 char fdpath[MAXPATHLEN]; 179 char *p; 180 const char *path; 181 const char *name = NULL; 182 FILE *fp; 183 fstyp_function fstyp_f; 184 fsvtyp_function fsvtyp_f; 185 186 while ((ch = getopt(argc, argv, "lsu")) != -1) { 187 switch (ch) { 188 case 'l': 189 show_label = true; 190 break; 191 case 's': 192 ignore_type = true; 193 break; 194 case 'u': 195 show_unmountable = true; 196 break; 197 default: 198 usage(); 199 } 200 } 201 202 argc -= optind; 203 argv += optind; 204 if (argc != 1) 205 usage(); 206 207 path = argv[0]; 208 209 if (setlocale(LC_CTYPE, "") == NULL) 210 err(1, "setlocale"); 211 212 /* 213 * DragonFly: Filesystems may have syntax to decorate path. 214 * Make a wild guess. 215 */ 216 strlcpy(fdpath, path, sizeof(fdpath)); 217 p = strchr(fdpath, '@'); 218 if (p) 219 *p = '\0'; 220 221 fp = fopen(fdpath, "r"); 222 if (fp == NULL) { 223 if (strcmp(path, fdpath)) 224 fp = fopen(path, "r"); 225 if (fp == NULL) 226 goto fsvtyp; /* DragonFly */ 227 else 228 strlcpy(fdpath, path, sizeof(fdpath)); 229 } 230 231 if (ignore_type == false) 232 type_check(fdpath, fp); 233 234 memset(label, '\0', sizeof(label)); 235 236 for (i = 0;; i++) { 237 if (show_unmountable == false && fstypes[i].unmountable == true) 238 continue; 239 fstyp_f = fstypes[i].function; 240 if (fstyp_f == NULL) 241 break; 242 243 error = fstyp_f(fp, label, sizeof(label), path); 244 if (error == 0) { 245 name = fstypes[i].name; 246 goto done; 247 } 248 } 249 fsvtyp: 250 for (i = 0;; i++) { 251 if (show_unmountable == false && fsvtypes[i].unmountable == true) 252 continue; 253 fsvtyp_f = fsvtypes[i].function; 254 if (fsvtyp_f == NULL) 255 break; 256 257 error = fsvtyp_f(path, label, sizeof(label)); 258 if (error == 0) { 259 name = fsvtypes[i].name; 260 goto done; 261 } 262 } 263 264 warnx("%s: filesystem not recognized", path); 265 return (1); 266 done: 267 if (show_label && label[0] != '\0') { 268 /* 269 * XXX: I'd prefer VIS_HTTPSTYLE, but it unconditionally 270 * encodes spaces. 271 */ 272 nbytes = strsnvis(strvised, sizeof(strvised), label, 273 VIS_GLOB | VIS_NL, "\"'$"); 274 if (nbytes == -1) 275 err(1, "strsnvis"); 276 277 printf("%s %s\n", name, strvised); 278 } else { 279 printf("%s\n", name); 280 } 281 282 return (0); 283 } 284