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/diskslice.h> 33 #include <sys/ioctl.h> 34 #include <sys/stat.h> 35 #include <err.h> 36 #include <errno.h> 37 #include <stdbool.h> 38 #include <stddef.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <unistd.h> 43 #include <vis.h> 44 45 #include "fstyp.h" 46 47 #define LABEL_LEN 256 48 49 typedef int (*fstyp_function)(FILE *, char *, size_t); 50 typedef int (*fsvtyp_function)(const char *, char *, size_t); 51 52 static struct { 53 const char *name; 54 fstyp_function function; 55 bool unmountable; 56 } fstypes[] = { 57 { "cd9660", &fstyp_cd9660, false }, 58 { "exfat", &fstyp_exfat, false }, 59 { "ext2fs", &fstyp_ext2fs, false }, 60 { "msdosfs", &fstyp_msdosfs, false }, 61 { "ntfs", &fstyp_ntfs, false }, 62 { "ufs", &fstyp_ufs, false }, 63 { "hammer", &fstyp_hammer, false }, 64 { "hammer2", &fstyp_hammer2, false }, 65 { NULL, NULL, NULL } 66 }; 67 68 static struct { 69 const char *name; 70 fsvtyp_function function; 71 bool unmountable; 72 } fsvtypes[] = { 73 { "hammer", &fsvtyp_hammer, false }, /* Must be before partial */ 74 { "hammer(partial)", &fsvtyp_hammer_partial, true }, 75 // XXX hammer2 not supported yet 76 { NULL, NULL, NULL } 77 }; 78 79 void * 80 read_buf(FILE *fp, off_t off, size_t len) 81 { 82 int error; 83 size_t nread; 84 void *buf; 85 86 error = fseek(fp, off, SEEK_SET); 87 if (error != 0) { 88 warn("cannot seek to %jd", (uintmax_t)off); 89 return (NULL); 90 } 91 92 buf = malloc(len); 93 if (buf == NULL) { 94 warn("cannot malloc %zd bytes of memory", len); 95 return (NULL); 96 } 97 98 nread = fread(buf, len, 1, fp); 99 if (nread != 1) { 100 free(buf); 101 if (feof(fp) == 0) 102 warn("fread"); 103 return (NULL); 104 } 105 106 return (buf); 107 } 108 109 char * 110 checked_strdup(const char *s) 111 { 112 char *c; 113 114 c = strdup(s); 115 if (c == NULL) 116 err(1, "strdup"); 117 return (c); 118 } 119 120 void 121 rtrim(char *label, size_t size) 122 { 123 ptrdiff_t i; 124 125 for (i = size - 1; i >= 0; i--) { 126 if (label[i] == '\0') 127 continue; 128 else if (label[i] == ' ') 129 label[i] = '\0'; 130 else 131 break; 132 } 133 } 134 135 static void 136 usage(void) 137 { 138 139 fprintf(stderr, "usage: fstyp [-l] [-s] [-u] special\n"); 140 exit(1); 141 } 142 143 static void 144 type_check(const char *path, FILE *fp) 145 { 146 int error, fd; 147 struct stat sb; 148 struct partinfo pinfo; 149 150 fd = fileno(fp); 151 152 error = fstat(fd, &sb); 153 if (error != 0) 154 err(1, "%s: fstat", path); 155 156 if (S_ISREG(sb.st_mode)) 157 return; 158 159 error = ioctl(fd, DIOCGPART, &pinfo); 160 if (error != 0) 161 errx(1, "%s: not a disk", path); 162 } 163 164 int 165 main(int argc, char **argv) 166 { 167 int ch, error, i, nbytes; 168 bool ignore_type = false, show_label = false, show_unmountable = false; 169 char label[LABEL_LEN + 1], strvised[LABEL_LEN * 4 + 1]; 170 char *path; 171 const char *name = NULL; 172 FILE *fp; 173 fstyp_function fstyp_f; 174 fsvtyp_function fsvtyp_f; 175 176 while ((ch = getopt(argc, argv, "lsu")) != -1) { 177 switch (ch) { 178 case 'l': 179 show_label = true; 180 break; 181 case 's': 182 ignore_type = true; 183 break; 184 case 'u': 185 show_unmountable = true; 186 break; 187 default: 188 usage(); 189 } 190 } 191 192 argc -= optind; 193 argv += optind; 194 if (argc != 1) 195 usage(); 196 197 path = argv[0]; 198 199 fp = fopen(path, "r"); 200 if (fp == NULL) 201 goto fsvtyp; /* DragonFly */ 202 203 if (ignore_type == false) 204 type_check(path, fp); 205 206 memset(label, '\0', sizeof(label)); 207 208 for (i = 0;; i++) { 209 if (show_unmountable == false && fstypes[i].unmountable == true) 210 continue; 211 fstyp_f = fstypes[i].function; 212 if (fstyp_f == NULL) 213 break; 214 215 error = fstyp_f(fp, label, sizeof(label)); 216 if (error == 0) { 217 name = fstypes[i].name; 218 goto done; 219 } 220 } 221 fsvtyp: 222 for (i = 0;; i++) { 223 if (show_unmountable == false && fsvtypes[i].unmountable == true) 224 continue; 225 fsvtyp_f = fsvtypes[i].function; 226 if (fsvtyp_f == NULL) 227 break; 228 229 error = fsvtyp_f(path, label, sizeof(label)); 230 if (error == 0) { 231 name = fsvtypes[i].name; 232 goto done; 233 } 234 } 235 236 warnx("%s: filesystem not recognized", path); 237 return (1); 238 done: 239 if (show_label && label[0] != '\0') { 240 /* 241 * XXX: I'd prefer VIS_HTTPSTYLE, but it unconditionally 242 * encodes spaces. 243 */ 244 nbytes = strsnvis(strvised, sizeof(strvised), label, 245 VIS_GLOB | VIS_NL, "\"'$"); 246 if (nbytes == -1) 247 err(1, "strsnvis"); 248 249 printf("%s %s\n", name, strvised); 250 } else { 251 printf("%s\n", name); 252 } 253 254 return (0); 255 } 256