56226f9c30
While it's not directly mountable with mount(8), it's something that's mountable - differently from GELI or zpools. MFC after: 2 weeks
237 lines
4.9 KiB
C
237 lines
4.9 KiB
C
/*-
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* Copyright (c) 2014 The FreeBSD Foundation
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* All rights reserved.
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*
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* This software was developed by Edward Tomasz Napierala under sponsorship
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* from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/capsicum.h>
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#include <sys/disk.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <err.h>
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#include <errno.h>
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <vis.h>
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#include "fstyp.h"
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#define LABEL_LEN 256
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typedef int (*fstyp_function)(FILE *, char *, size_t);
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static struct {
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const char *name;
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fstyp_function function;
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bool unmountable;
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} fstypes[] = {
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{ "cd9660", &fstyp_cd9660, false },
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{ "exfat", &fstyp_exfat, false },
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{ "ext2fs", &fstyp_ext2fs, false },
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{ "geli", &fstyp_geli, true },
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{ "msdosfs", &fstyp_msdosfs, false },
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{ "ntfs", &fstyp_ntfs, false },
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{ "ufs", &fstyp_ufs, false },
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#ifdef HAVE_ZFS
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{ "zfs", &fstyp_zfs, true },
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#endif
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{ NULL, NULL, NULL }
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};
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void *
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read_buf(FILE *fp, off_t off, size_t len)
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{
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int error;
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size_t nread;
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void *buf;
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error = fseek(fp, off, SEEK_SET);
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if (error != 0) {
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warn("cannot seek to %jd", (uintmax_t)off);
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return (NULL);
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}
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buf = malloc(len);
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if (buf == NULL) {
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warn("cannot malloc %zd bytes of memory", len);
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return (NULL);
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}
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nread = fread(buf, len, 1, fp);
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if (nread != 1) {
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free(buf);
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if (feof(fp) == 0)
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warn("fread");
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return (NULL);
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}
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return (buf);
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}
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char *
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checked_strdup(const char *s)
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{
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char *c;
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c = strdup(s);
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if (c == NULL)
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err(1, "strdup");
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return (c);
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}
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void
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rtrim(char *label, size_t size)
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{
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ptrdiff_t i;
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for (i = size - 1; i >= 0; i--) {
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if (label[i] == '\0')
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continue;
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else if (label[i] == ' ')
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label[i] = '\0';
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else
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break;
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}
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}
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static void
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usage(void)
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{
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fprintf(stderr, "usage: fstyp [-l] [-s] [-u] special\n");
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exit(1);
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}
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static void
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type_check(const char *path, FILE *fp)
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{
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int error, fd;
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off_t mediasize;
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struct stat sb;
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fd = fileno(fp);
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error = fstat(fd, &sb);
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if (error != 0)
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err(1, "%s: fstat", path);
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if (S_ISREG(sb.st_mode))
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return;
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error = ioctl(fd, DIOCGMEDIASIZE, &mediasize);
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if (error != 0)
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errx(1, "%s: not a disk", path);
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}
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int
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main(int argc, char **argv)
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{
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int ch, error, i, nbytes;
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bool ignore_type = false, show_label = false, show_unmountable = false;
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char label[LABEL_LEN + 1], strvised[LABEL_LEN * 4 + 1];
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char *path;
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FILE *fp;
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fstyp_function fstyp_f;
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while ((ch = getopt(argc, argv, "lsu")) != -1) {
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switch (ch) {
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case 'l':
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show_label = true;
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break;
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case 's':
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ignore_type = true;
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break;
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case 'u':
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show_unmountable = true;
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break;
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default:
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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if (argc != 1)
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usage();
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path = argv[0];
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fp = fopen(path, "r");
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if (fp == NULL)
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err(1, "%s", path);
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error = cap_enter();
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if (error != 0 && errno != ENOSYS)
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err(1, "cap_enter");
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if (ignore_type == false)
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type_check(path, fp);
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memset(label, '\0', sizeof(label));
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for (i = 0;; i++) {
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if (show_unmountable == false && fstypes[i].unmountable == true)
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continue;
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fstyp_f = fstypes[i].function;
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if (fstyp_f == NULL)
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break;
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error = fstyp_f(fp, label, sizeof(label));
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if (error == 0)
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break;
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}
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if (fstypes[i].name == NULL) {
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warnx("%s: filesystem not recognized", path);
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return (1);
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}
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if (show_label && label[0] != '\0') {
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/*
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* XXX: I'd prefer VIS_HTTPSTYLE, but it unconditionally
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* encodes spaces.
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*/
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nbytes = strsnvis(strvised, sizeof(strvised), label,
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VIS_GLOB | VIS_NL, "\"'$");
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if (nbytes == -1)
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err(1, "strsnvis");
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printf("%s %s\n", fstypes[i].name, strvised);
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} else {
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printf("%s\n", fstypes[i].name);
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}
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return (0);
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}
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