GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: sbin/fdisk/fdisk.c Lines: 0 101 0.0 %
Date: 2017-11-07 Branches: 0 71 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: fdisk.c,v 1.102 2016/12/27 15:01:03 krw Exp $	*/
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/*
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 * Copyright (c) 1997 Tobias Weingartner
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 *
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 * Permission to use, copy, modify, and distribute this software for any
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 * purpose with or without fee is hereby granted, provided that the above
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 * copyright notice and this permission notice appear in all copies.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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 */
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#include <sys/types.h>
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#include <sys/fcntl.h>
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#include <sys/disklabel.h>
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#include <err.h>
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#include <paths.h>
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#include <stdint.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 "disk.h"
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#include "part.h"
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#include "mbr.h"
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#include "misc.h"
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#include "cmd.h"
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#include "user.h"
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#include "gpt.h"
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#define _PATH_MBR _PATH_BOOTDIR "mbr"
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static unsigned char builtin_mbr[] = {
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#include "mbrcode.h"
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};
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u_int32_t b_arg;
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int	y_flag;
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static void
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usage(void)
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{
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	extern char * __progname;
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	fprintf(stderr, "usage: %s "
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	    "[-egvy] [-i|-u] [-b #] [-c # -h # -s #] "
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	    "[-f mbrfile] [-l # ] disk\n"
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	    "\t-b: specify special boot partition block count; requires -i\n"
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	    "\t-chs: specify disk geometry; all three must be specified\n"
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	    "\t-e: interactively edit MBR or GPT\n"
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	    "\t-f: specify non-standard MBR template\n"
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	    "\t-g: initialize disk with GPT; requires -i\n"
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	    "\t-i: initialize disk with MBR unless -g is also specified\n"
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	    "\t-l: specify LBA block count; cannot be used with -chs\n"
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	    "\t-u: update MBR code; preserve partition table\n"
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	    "\t-v: print the MBR, the Primary GPT and the Secondary GPT\n"
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	    "\t-y: do not ask questions\n"
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	    "`disk' may be of the forms: sd0 or /dev/rsd0c.\n",
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	    __progname);
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	exit(1);
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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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	ssize_t len;
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	int ch, fd, error;
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	int e_flag = 0, g_flag = 0, i_flag = 0, u_flag = 0;
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	int verbosity = 0;
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	int c_arg = 0, h_arg = 0, s_arg = 0;
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	u_int32_t l_arg = 0;
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	char *query;
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#ifdef HAS_MBR
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	char *mbrfile = _PATH_MBR;
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#else
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	char *mbrfile = NULL;
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#endif
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	struct dos_mbr dos_mbr;
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	struct mbr mbr;
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	while ((ch = getopt(argc, argv, "iegpuvf:c:h:s:l:b:y")) != -1) {
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		const char *errstr;
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		switch(ch) {
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		case 'i':
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			i_flag = 1;
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			break;
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		case 'u':
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			u_flag = 1;
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			break;
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		case 'e':
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			e_flag = 1;
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			break;
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		case 'f':
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			mbrfile = optarg;
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			break;
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		case 'c':
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			c_arg = strtonum(optarg, 1, 262144, &errstr);
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			if (errstr)
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				errx(1, "Cylinder argument %s [1..262144].",
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				    errstr);
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			disk.cylinders = c_arg;
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			disk.size = c_arg * h_arg * s_arg;
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			break;
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		case 'h':
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			h_arg = strtonum(optarg, 1, 256, &errstr);
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			if (errstr)
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				errx(1, "Head argument %s [1..256].", errstr);
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			disk.heads = h_arg;
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			disk.size = c_arg * h_arg * s_arg;
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			break;
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		case 's':
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			s_arg = strtonum(optarg, 1, 63, &errstr);
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			if (errstr)
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				errx(1, "Sector argument %s [1..63].", errstr);
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			disk.sectors = s_arg;
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			disk.size = c_arg * h_arg * s_arg;
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			break;
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		case 'g':
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			g_flag = 1;
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			break;
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		case 'b':
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			b_arg = strtonum(optarg, 64, UINT32_MAX, &errstr);
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			if (errstr)
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				errx(1, "Block argument %s [64..%u].", errstr,
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				    UINT32_MAX);
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			break;
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		case 'l':
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			l_arg = strtonum(optarg, 64, UINT32_MAX, &errstr);
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			if (errstr)
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				errx(1, "Block argument %s [64..%u].", errstr,
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				    UINT32_MAX);
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			disk.cylinders = l_arg / 64;
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			disk.heads = 1;
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			disk.sectors = 64;
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			disk.size = l_arg;
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			break;
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		case 'y':
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			y_flag = 1;
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			break;
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		case 'v':
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			verbosity++;
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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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	/* Argument checking */
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	if (argc != 1 || (i_flag && u_flag) ||
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	    (i_flag == 0 && (b_arg || g_flag)) ||
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	    ((c_arg | h_arg | s_arg) && !(c_arg && h_arg && s_arg)) ||
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	    ((c_arg | h_arg | s_arg) && l_arg))
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		usage();
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	disk.name = argv[0];
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	DISK_open(i_flag || u_flag || e_flag);
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	/* "proc exec" for man page display */
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	if (pledge("stdio rpath wpath disklabel proc exec flock cpath", NULL) == -1)
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		err(1, "pledge");
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	error = MBR_read(0, &dos_mbr);
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	if (error)
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		errx(1, "Can't read sector 0!");
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	MBR_parse(&dos_mbr, 0, 0, &mbr);
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	/* Get the GPT if present. Either primary or secondary is ok. */
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	if (MBR_protective_mbr(&mbr) == 0)
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		GPT_get_gpt(0);
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	if (!(i_flag || u_flag || e_flag)) {
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		if (pledge("stdio flock rpath cpath wpath", NULL) == -1)
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			err(1, "pledge");
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		USER_print_disk(verbosity);
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		goto done;
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	}
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	/* Create initial/default MBR. */
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	if (mbrfile == NULL) {
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		memcpy(&dos_mbr, builtin_mbr, sizeof(dos_mbr));
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	} else {
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		fd = open(mbrfile, O_RDONLY);
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		if (fd == -1) {
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			warn("%s", mbrfile);
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			warnx("using builtin MBR");
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			memcpy(&dos_mbr, builtin_mbr, sizeof(dos_mbr));
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		} else {
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			len = read(fd, &dos_mbr, sizeof(dos_mbr));
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			close(fd);
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			if (len == -1)
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				err(1, "Unable to read MBR from '%s'", mbrfile);
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			else if (len != sizeof(dos_mbr))
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				errx(1, "Unable to read complete MBR from '%s'",
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				    mbrfile);
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		}
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	}
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	MBR_parse(&dos_mbr, 0, 0, &initial_mbr);
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	query = NULL;
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	if (i_flag) {
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		reinited = 1;
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		if (g_flag) {
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			MBR_init_GPT(&initial_mbr);
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			GPT_init();
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			query = "Do you wish to write new GPT?";
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		} else {
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			MBR_init(&initial_mbr);
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			query = "Do you wish to write new MBR and "
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			    "partition table?";
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		}
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	} else if (u_flag) {
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		memcpy(initial_mbr.part, mbr.part, sizeof(initial_mbr.part));
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		query = "Do you wish to write new MBR?";
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	}
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	if (query && ask_yn(query))
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		Xwrite(NULL, &initial_mbr);
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	if (e_flag)
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		USER_edit(0, 0);
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done:
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	close(disk.fd);
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	return (0);
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}