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/* $OpenBSD: user.c,v 1.21 2003/06/11 06:22:12 deraadt Exp $ */
/*
* Copyright (c) 1997 Tobias Weingartner
* All rights reserved.
*
* 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 ``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 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 <err.h>
#include <util.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/disklabel.h>
#include <machine/param.h>
#include "user.h"
#include "disk.h"
#include "misc.h"
#include "mbr.h"
#include "cmd.h"
/* Our command table */
static cmd_table_t cmd_table[] = {
{"help", Xhelp, "Command help list"},
{"manual", Xmanual, "Show entire OpenBSD man page for fdisk"},
{"reinit", Xreinit, "Re-initialize loaded MBR (to defaults)"},
{"setpid", Xsetpid, "Set the identifier of a given table entry"},
{"disk", Xdisk, "Edit current drive stats"},
{"edit", Xedit, "Edit given table entry"},
{"flag", Xflag, "Flag given table entry as bootable"},
{"update", Xupdate, "Update machine code in loaded MBR"},
{"select", Xselect, "Select extended partition table entry MBR"},
{"print", Xprint, "Print loaded MBR partition table"},
{"write", Xwrite, "Write loaded MBR to disk"},
{"exit", Xexit, "Exit edit of current MBR, without saving changes"},
{"quit", Xquit, "Quit edit of current MBR, saving current changes"},
{"abort", Xabort, "Abort program without saving current changes"},
{NULL, NULL, NULL}
};
int
USER_init(disk_t *disk, mbr_t *tt, int preserve)
{
int fd, yn;
char mbr_buf[DEV_BSIZE];
char *msgp = "\nDo you wish to write new MBR?";
char *msgk = "\nDo you wish to write new MBR and partition table?";
if (preserve)
MBR_pcopy(disk, tt);
else
MBR_init(disk, tt);
/* Write sector 0 */
printf("\a\n"
"\t-----------------------------------------------------\n"
"\t------ ATTENTION - UPDATING MASTER BOOT RECORD ------\n"
"\t-----------------------------------------------------\n");
if (preserve)
yn = ask_yn(msgp);
else
yn = ask_yn(msgk);
if (yn) {
fd = DISK_open(disk->name, O_RDWR);
MBR_make(tt, mbr_buf);
MBR_write(fd, (off_t)0, mbr_buf);
DISK_close(fd);
} else
printf("MBR is unchanged\n");
return (0);
}
int modified;
int
USER_modify(disk_t *disk, mbr_t *tt, off_t offset, off_t reloff)
{
static int editlevel;
char mbr_buf[DEV_BSIZE];
mbr_t mbr;
cmd_t cmd;
int i, st, fd;
/* One level deeper */
editlevel += 1;
/* Set up command table pointer */
cmd.table = cmd_table;
/* Read MBR & partition */
fd = DISK_open(disk->name, O_RDONLY);
MBR_read(fd, offset, mbr_buf);
DISK_close(fd);
/* Parse the sucker */
MBR_parse(disk, mbr_buf, offset, reloff, &mbr);
printf("Enter 'help' for information\n");
/* Edit cycle */
do {
again:
printf("fdisk:%c%d> ", (modified)?'*':' ', editlevel);
fflush(stdout);
ask_cmd(&cmd);
if (cmd.cmd[0] == '\0')
goto again;
for (i = 0; cmd_table[i].cmd != NULL; i++)
if (strstr(cmd_table[i].cmd, cmd.cmd)==cmd_table[i].cmd)
break;
/* Quick hack to put in '?' == 'help' */
if (!strcmp(cmd.cmd, "?"))
i = 0;
/* Check for valid command */
if (cmd_table[i].cmd == NULL) {
printf("Invalid command '%s'. Try 'help'.\n", cmd.cmd);
continue;
} else
strlcpy(cmd.cmd, cmd_table[i].cmd, sizeof cmd.cmd);
/* Call function */
st = cmd_table[i].fcn(&cmd, disk, &mbr, tt, offset);
/* Update status */
if (st == CMD_EXIT)
break;
if (st == CMD_SAVE)
break;
if (st == CMD_CLEAN)
modified = 0;
if (st == CMD_DIRTY)
modified = 1;
} while (1);
/* Write out MBR */
if (modified) {
if (st == CMD_SAVE) {
printf("Writing current MBR to disk.\n");
fd = DISK_open(disk->name, O_RDWR);
MBR_make(&mbr, mbr_buf);
MBR_write(fd, offset, mbr_buf);
close(fd);
} else
printf("Aborting changes to current MBR.\n");
}
/* One level less */
editlevel -= 1;
return (0);
}
int
USER_print_disk(disk_t *disk)
{
int fd, offset, firstoff, i;
char mbr_buf[DEV_BSIZE];
mbr_t mbr;
fd = DISK_open(disk->name, O_RDONLY);
offset = firstoff = 0;
DISK_printmetrics(disk, NULL);
do {
MBR_read(fd, (off_t)offset, mbr_buf);
MBR_parse(disk, mbr_buf, offset, firstoff, &mbr);
printf("Offset: %d\t", (int)offset);
MBR_print(&mbr, NULL);
/* Print out extended partitions too */
for (offset = i = 0; i < 4; i++)
if (mbr.part[i].id == DOSPTYP_EXTEND ||
mbr.part[i].id == DOSPTYP_EXTENDL) {
offset = mbr.part[i].bs;
if (firstoff == 0)
firstoff = offset;
}
} while (offset);
return (DISK_close(fd));
}
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