/* $NetBSD: fstyp.c,v 1.13 2020/01/03 07:50:58 mlelstv Exp $ */ /*- * Copyright (c) 2017 The NetBSD Foundation, Inc. * Copyright (c) 2016 The DragonFly Project * Copyright (c) 2014 The FreeBSD Foundation * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Tomohiro Kusumi . * * This software was developed by Edward Tomasz Napierala under sponsorship * from the FreeBSD Foundation. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * */ #include __RCSID("$NetBSD: fstyp.c,v 1.13 2020/01/03 07:50:58 mlelstv Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "fstyp.h" #define LABEL_LEN 512 bool show_label = false; typedef int (*fstyp_function)(FILE *, char *, size_t); typedef int (*fsvtyp_function)(const char *, char *, size_t); static struct { const char *name; fstyp_function function; bool unmountable; const char *precache_encoding; } fstypes[] = { { "apfs", &fstyp_apfs, true, NULL }, { "cd9660", &fstyp_cd9660, false, NULL }, { "exfat", &fstyp_exfat, false, EXFAT_ENC }, { "ext2fs", &fstyp_ext2fs, false, NULL }, { "hfs+", &fstyp_hfsp, false, NULL }, { "msdosfs", &fstyp_msdosfs, false, NULL }, { "ntfs", &fstyp_ntfs, false, NTFS_ENC }, { "ufs", &fstyp_ufs, false, NULL }, { "hammer", &fstyp_hammer, false, NULL }, { "hammer2", &fstyp_hammer2, false, NULL }, #ifdef HAVE_ZFS { "zfs", &fstyp_zfs, true, NULL }, #endif { NULL, NULL, NULL, NULL } }; static struct { const char *name; fsvtyp_function function; bool unmountable; const char *precache_encoding; } fsvtypes[] = { { "hammer", &fsvtyp_hammer, false, NULL }, /* Must be before partial */ { "hammer(partial)", &fsvtyp_hammer_partial, true, NULL }, { NULL, NULL, NULL, NULL } }; void * read_buf(FILE *fp, off_t off, size_t len) { int error; size_t nread; void *buf; error = fseeko(fp, off, SEEK_SET); if (error != 0) { warn("cannot seek to %jd", (uintmax_t)off); return NULL; } buf = malloc(len); if (buf == NULL) { warn("cannot malloc %zd bytes of memory", len); return NULL; } nread = fread(buf, len, 1, fp); if (nread != 1) { free(buf); if (feof(fp) == 0) warn("fread"); return NULL; } return buf; } char * checked_strdup(const char *s) { char *c; c = strdup(s); if (c == NULL) err(EXIT_FAILURE, "strdup"); return c; } void rtrim(char *label, size_t size) { for (size_t i = size; i > 0; i--) { size_t j = i - 1; if (label[j] == '\0') continue; else if (label[j] == ' ') label[j] = '\0'; else break; } } __dead static void usage(void) { fprintf(stderr, "Usage: %s [-l] [-s] [-u] special\n", getprogname()); exit(EXIT_FAILURE); } static void type_check(const char *path, FILE *fp) { int error, fd; struct stat sb; struct disklabel dl; struct dkwedge_info dkw; fd = fileno(fp); error = fstat(fd, &sb); if (error != 0) err(EXIT_FAILURE, "%s: fstat", path); if (S_ISREG(sb.st_mode)) return; error = ioctl(fd, DIOCGDINFO, &dl); if (error != 0) error = ioctl(fd, DIOCGWEDGEINFO, &dkw); if (error != 0) errx(EXIT_FAILURE, "%s: not a disk", path); } int main(int argc, char **argv) { int ch, error, i, nbytes; bool ignore_type = false, show_unmountable = false; char label[LABEL_LEN + 1], strvised[LABEL_LEN * 4 + 1]; char fdpath[MAXPATHLEN]; char *p; const char *path; const char *name = NULL; FILE *fp; fstyp_function fstyp_f; fsvtyp_function fsvtyp_f; while ((ch = getopt(argc, argv, "lsu")) != -1) { switch (ch) { case 'l': show_label = true; break; case 's': ignore_type = true; break; case 'u': show_unmountable = true; break; default: usage(); } } argc -= optind; argv += optind; if (argc != 1) usage(); path = argv[0]; if (setlocale(LC_CTYPE, "") == NULL) err(1, "setlocale"); /* * DragonFly: Filesystems may have syntax to decorate path. * Make a wild guess. * XXX devpath is unsupported in NetBSD, but at least parse '@' for fp. */ strlcpy(fdpath, path, sizeof(fdpath)); p = strchr(fdpath, '@'); if (p) *p = '\0'; fp = fopen(fdpath, "r"); if (fp == NULL) { if (strcmp(path, fdpath)) fp = fopen(path, "r"); if (fp == NULL) goto fsvtyp; /* DragonFly */ else strlcpy(fdpath, path, sizeof(fdpath)); } if (ignore_type == false) type_check(fdpath, fp); memset(label, '\0', sizeof(label)); for (i = 0;; i++) { if (!show_unmountable && fstypes[i].unmountable) continue; fstyp_f = fstypes[i].function; if (fstyp_f == NULL) break; error = fstyp_f(fp, label, sizeof(label)); if (error == 0) { name = fstypes[i].name; goto done; } } fsvtyp: for (i = 0;; i++) { if (!show_unmountable && fsvtypes[i].unmountable) continue; fsvtyp_f = fsvtypes[i].function; if (fsvtyp_f == NULL) break; error = fsvtyp_f(path, label, sizeof(label)); if (error == 0) { name = fsvtypes[i].name; goto done; } } err(EXIT_FAILURE, "%s: filesystem not recognized", path); /*NOTREACHED*/ done: if (show_label && label[0] != '\0') { /* * XXX: I'd prefer VIS_HTTPSTYLE, but it unconditionally * encodes spaces. */ nbytes = strsnvis(strvised, sizeof(strvised), label, VIS_GLOB | VIS_NL, "\"'$"); if (nbytes == -1) err(EXIT_FAILURE, "strsnvis"); printf("%s %s\n", name, strvised); } else { printf("%s\n", name); } return EXIT_SUCCESS; }