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/* $OpenBSD: user.c,v 1.57 2021/07/11 13:51:42 krw Exp $ */
/*
* Copyright (c) 1997 Tobias Weingartner
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/disklabel.h>
#include <err.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "part.h"
#include "mbr.h"
#include "misc.h"
#include "cmd.h"
#include "user.h"
#include "gpt.h"
#include "disk.h"
/* Our command table */
struct cmd cmd_table[] = {
{"help", 1, Xhelp, "Command help list"},
{"manual", 1, Xmanual, "Show entire OpenBSD man page for fdisk"},
{"reinit", 1, Xreinit, "Re-initialize loaded MBR (to defaults)"},
{"setpid", 1, Xsetpid, "Set the identifier of a given table entry"},
{"disk", 0, Xdisk, "Edit current drive stats"},
{"edit", 1, Xedit, "Edit given table entry"},
{"flag", 1, Xflag, "Flag given table entry as bootable"},
{"update", 0, Xupdate, "Update machine code in loaded MBR"},
{"select", 0, Xselect, "Select extended partition table entry MBR"},
{"swap", 1, Xswap, "Swap two partition entries"},
{"print", 1, Xprint, "Print loaded MBR partition table"},
{"write", 1, Xwrite, "Write loaded MBR to disk"},
{"exit", 1, Xexit, "Exit edit of current MBR, without saving changes"},
{"quit", 1, Xquit, "Quit edit of current MBR, saving current changes"},
{"abort", 1, Xabort, "Abort program without saving current changes"},
{NULL, 0, NULL, NULL}
};
int modified;
void ask_cmd(char **, char **);
void
USER_edit(off_t offset, off_t reloff)
{
struct dos_mbr dos_mbr;
struct mbr mbr;
char *cmd, *args;
int i, st, efi, error;
static int editlevel;
/* One level deeper */
editlevel += 1;
/* Read MBR & partition */
error = MBR_read(offset, &dos_mbr);
if (error == -1)
goto done;
/* Parse the sucker */
MBR_parse(&dos_mbr, offset, reloff, &mbr);
if (editlevel == 1) {
memset(&gh, 0, sizeof(gh));
memset(&gp, 0, sizeof(gp));
efi = MBR_protective_mbr(&mbr);
if (efi != -1)
GPT_read(ANYGPT);
}
printf("Enter 'help' for information\n");
/* Edit cycle */
again:
do {
printf("%s%s: %d> ", disk.name, modified ? "*" : "", editlevel);
fflush(stdout);
ask_cmd(&cmd, &args);
if (cmd[0] == '\0')
continue;
for (i = 0; cmd_table[i].cmd != NULL; i++)
if (strstr(cmd_table[i].cmd, cmd) == cmd_table[i].cmd)
break;
/* Quick hack to put in '?' == 'help' */
if (!strcmp(cmd, "?"))
i = 0;
/* Check for valid command */
if ((cmd_table[i].cmd == NULL) || (letoh64(gh.gh_sig) ==
GPTSIGNATURE && cmd_table[i].gpt == 0)) {
printf("Invalid command '%s'. Try 'help'.\n", cmd);
continue;
}
/* Call function */
st = cmd_table[i].fcn(args, &mbr);
/* 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) {
if (Xwrite(NULL, &mbr) == CMD_CONT)
goto again;
} else
printf("Aborting changes to current MBR.\n");
}
done:
/* One level less */
editlevel -= 1;
}
void
USER_print_disk(int verbosity)
{
struct dos_mbr dos_mbr;
struct mbr mbr;
off_t offset, firstoff;
int i, efi, error;
offset = firstoff = 0;
do {
error = MBR_read(offset, &dos_mbr);
if (error == -1)
break;
MBR_parse(&dos_mbr, offset, firstoff, &mbr);
if (offset == 0) {
efi = MBR_protective_mbr(&mbr);
if (efi == -1) {
/* No valid 0xEE partition means no GPT. */
if (verbosity == VERBOSE) {
printf("Primary GPT:\nNot Found\n");
printf("\nSecondary GPT:\nNot Found\n");
}
} else if (verbosity == TERSE) {
/* Should already have read one of Primary/Secondary GPT. */
if (letoh64(gh.gh_sig) == GPTSIGNATURE) {
GPT_print("s", verbosity);
return;
}
} else {
/*. Read & print both primary and secondary GPT. */
printf("Primary GPT:\n");
GPT_read(PRIMARYGPT);
if (letoh64(gh.gh_sig) == GPTSIGNATURE)
GPT_print("s", verbosity);
else
printf("\tNot Found\n");
printf("\nSecondary GPT:\n");
GPT_read(SECONDARYGPT);
if (letoh64(gh.gh_sig) == GPTSIGNATURE)
GPT_print("s", verbosity);
else
printf("\tNot Found\n");
}
if (verbosity == VERBOSE)
printf("\nMBR:\n");
}
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 = (off_t)mbr.part[i].bs;
if (firstoff == 0)
firstoff = offset;
}
} while (offset);
}
void
ask_cmd(char **cmd, char **arg)
{
static char lbuf[100];
size_t cmdstart, cmdend, argstart;
/* Get NUL terminated string from stdin. */
if (string_from_line(lbuf, sizeof(lbuf)))
errx(1, "eof");
cmdstart = strspn(lbuf, " \t");
cmdend = cmdstart + strcspn(&lbuf[cmdstart], " \t");
argstart = cmdend + strspn(&lbuf[cmdend], " \t");
/* *cmd and *arg may be set to point at final NUL! */
*cmd = &lbuf[cmdstart];
lbuf[cmdend] = '\0';
*arg = &lbuf[argstart];
}
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