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/* $OpenBSD: cmd.c,v 1.139 2021/08/15 13:45:42 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 <signal.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <uuid.h>
#include "part.h"
#include "disk.h"
#include "misc.h"
#include "mbr.h"
#include "gpt.h"
#include "user.h"
#include "cmd.h"
int gedit(const int);
int edit(const int, struct mbr *);
int gsetpid(const int);
int setpid(const int, struct mbr *);
int parsepn(const char *);
int ask_num(const char *, int, int, int);
int ask_pid(const int, struct uuid *);
char *ask_string(const char *, const char *);
extern const unsigned char manpage[];
extern const int manpage_sz;
int
Xreinit(char *args, struct mbr *mbr)
{
int dogpt;
dogpt = 0;
if (strncasecmp(args, "gpt", 3) == 0)
dogpt = 1;
else if (strncasecmp(args, "mbr", 3) == 0)
dogpt = 0;
else if (strlen(args) > 0) {
printf("Unrecognized modifier '%s'\n", args);
return CMD_CONT;
}
if (dogpt) {
GPT_init(GHANDGP);
GPT_print("s", TERSE);
} else {
MBR_init(mbr);
MBR_print(mbr, "s");
}
printf("Use 'write' to update disk.\n");
return CMD_DIRTY;
}
int
Xdisk(char *args, struct mbr *mbr)
{
int maxcyl = 1024;
int maxhead = 256;
int maxsec = 63;
DISK_printgeometry(args);
#if defined (__powerpc__) || defined (__mips__)
maxcyl = 9999999;
maxhead = 9999999;
maxsec = 9999999;
#endif
if (ask_yn("Change disk geometry?")) {
disk.dk_cylinders = ask_num("BIOS Cylinders",
disk.dk_cylinders, 1, maxcyl);
disk.dk_heads = ask_num("BIOS Heads",
disk.dk_heads, 1, maxhead);
disk.dk_sectors = ask_num("BIOS Sectors",
disk.dk_sectors, 1, maxsec);
disk.dk_size = disk.dk_cylinders * disk.dk_heads * disk.dk_sectors;
}
return CMD_CONT;
}
int
Xswap(char *args, struct mbr *mbr)
{
char *from, *to;
int pf, pt;
struct prt pp;
struct gpt_partition gg;
to = args;
from = strsep(&to, " \t");
pt = parsepn(to);
if (pt == -1)
return CMD_CONT;
pf = parsepn(from);
if (pf == -1)
return CMD_CONT;
if (pt == pf) {
printf("%d same partition as %d, doing nothing.\n", pt, pf);
return CMD_CONT;
}
if (letoh64(gh.gh_sig) == GPTSIGNATURE) {
gg = gp[pt];
gp[pt] = gp[pf];
gp[pf] = gg;
} else {
pp = mbr->mbr_prt[pt];
mbr->mbr_prt[pt] = mbr->mbr_prt[pf];
mbr->mbr_prt[pf] = pp;
}
return CMD_DIRTY;
}
int
gedit(const int pn)
{
struct uuid oldtype;
struct gpt_partition *gg;
char *name;
uint16_t *utf;
int i;
gg = &gp[pn];
oldtype = gg->gp_type;
if (gsetpid(pn))
return -1;
if (uuid_is_nil(&gg->gp_type, NULL)) {
if (uuid_is_nil(&oldtype, NULL) == 0) {
memset(gg, 0, sizeof(struct gpt_partition));
printf("Partition %d is disabled.\n", pn);
}
return 0;
}
if (GPT_get_lba_start(pn) == -1 ||
GPT_get_lba_end(pn) == -1) {
return -1;
}
name = ask_string("Partition name", utf16le_to_string(gg->gp_name));
if (strlen(name) >= GPTPARTNAMESIZE) {
printf("partition name must be < %d characters\n",
GPTPARTNAMESIZE);
return -1;
}
/*
* N.B.: simple memcpy() could copy trash from static buf! This
* would create false positives for the partition having changed.
*/
utf = string_to_utf16le(name);
for (i = 0; i < GPTPARTNAMESIZE; i++) {
gg->gp_name[i] = utf[i];
if (utf[i] == 0)
break;
}
return 0;
}
int
parsepn(const char *pnstr)
{
const char *errstr;
int maxpn, pn;
if (pnstr == NULL) {
printf("no partition number\n");
return -1;
}
if (letoh64(gh.gh_sig) == GPTSIGNATURE)
maxpn = letoh32(gh.gh_part_num) - 1;
else
maxpn = NDOSPART - 1;
pn = strtonum(pnstr, 0, maxpn, &errstr);
if (errstr) {
printf("partition number is %s: %s\n", errstr, pnstr);
return -1;
}
return pn;
}
int
edit(const int pn, struct mbr *mbr)
{
struct prt *pp;
unsigned char oldid;
pp = &mbr->mbr_prt[pn];
oldid = pp->prt_id;
if (setpid(pn, mbr))
return -1;
if (pp->prt_id == DOSPTYP_UNUSED) {
if (oldid != DOSPTYP_UNUSED) {
memset(pp, 0, sizeof(*pp));
printf("Partition %d is disabled.\n", pn);
}
return 0;
}
if (ask_yn("Do you wish to edit in CHS mode?")) {
pp->prt_scyl = ask_num("BIOS Starting cylinder", pp->prt_scyl, 0,
disk.dk_cylinders - 1);
pp->prt_shead = ask_num("BIOS Starting head", pp->prt_shead, 0,
disk.dk_heads - 1);
pp->prt_ssect = ask_num("BIOS Starting sector", pp->prt_ssect, 1,
disk.dk_sectors);
pp->prt_ecyl = ask_num("BIOS Ending cylinder", pp->prt_ecyl,
pp->prt_scyl, disk.dk_cylinders - 1);
pp->prt_ehead = ask_num("BIOS Ending head", pp->prt_ehead,
(pp->prt_scyl == pp->prt_ecyl) ? pp->prt_shead : 0, disk.dk_heads - 1);
pp->prt_esect = ask_num("BIOS Ending sector", pp->prt_esect,
(pp->prt_scyl == pp->prt_ecyl && pp->prt_shead == pp->prt_ehead) ? pp->prt_ssect
: 1, disk.dk_sectors);
/* Fix up off/size values */
PRT_fix_BN(pp, pn);
/* Fix up CHS values for LBA */
PRT_fix_CHS(pp);
} else {
pp->prt_bs = getuint64("Partition offset", pp->prt_bs, 0, disk.dk_size - 1);
pp->prt_ns = getuint64("Partition size", pp->prt_ns, 1,
disk.dk_size - pp->prt_bs);
/* Fix up CHS values */
PRT_fix_CHS(pp);
}
return 0;
}
int
Xedit(char *args, struct mbr *mbr)
{
struct gpt_partition oldgg;
struct prt oldprt;
struct gpt_partition *gg;
int pn;
pn = parsepn(args);
if (pn == -1)
return CMD_CONT;
if (letoh64(gh.gh_sig) == GPTSIGNATURE) {
oldgg = gp[pn];
if (gedit(pn))
gp[pn] = oldgg;
else if (memcmp(&gp[pn], &oldgg, sizeof(oldgg)))
return CMD_DIRTY;
} else {
oldprt = mbr->mbr_prt[pn];
if (edit(pn, mbr))
mbr->mbr_prt[pn] = oldprt;
else if (memcmp(&mbr->mbr_prt[pn], &oldprt, sizeof(oldprt)))
return CMD_DIRTY;
}
return CMD_CONT;
}
int
gsetpid(const int pn)
{
struct uuid gp_type, gp_guid;
struct gpt_partition *gg;
int num, status;
gg = &gp[pn];
GPT_print_parthdr(TERSE);
GPT_print_part(pn, "s", TERSE);
uuid_dec_le(&gg->gp_type, &gp_type);
if (PRT_protected_guid(&gp_type)) {
printf("can't edit partition type %s\n",
PRT_uuid_to_typename(&gp_type));
return -1;
}
/* Ask for partition type or GUID. */
num = ask_pid(PRT_uuid_to_type(&gp_type), &gp_type);
if (num <= 0xff)
gp_type = *(PRT_type_to_uuid(num));
if (PRT_protected_guid(&gp_type)) {
printf("can't change partition type to %s\n",
PRT_uuid_to_typename(&gp_type));
return -1;
}
uuid_dec_le(&gg->gp_guid, &gp_guid);
if (uuid_is_nil(&gp_guid, NULL)) {
uuid_create(&gp_guid, &status);
if (status != uuid_s_ok) {
printf("could not create guid for partition\n");
return -1;
}
}
uuid_enc_le(&gg->gp_type, &gp_type);
uuid_enc_le(&gg->gp_guid, &gp_guid);
return 0;
}
int
setpid(const int pn, struct mbr *mbr)
{
struct prt *pp;
pp = &mbr->mbr_prt[pn];
PRT_print(0, NULL, NULL);
PRT_print(pn, pp, NULL);
pp->prt_id = ask_pid(pp->prt_id, NULL);
return 0;
}
int
Xsetpid(char *args, struct mbr *mbr)
{
struct gpt_partition oldgg;
struct prt oldprt;
int pn;
pn = parsepn(args);
if (pn == -1)
return CMD_CONT;
if (letoh64(gh.gh_sig) == GPTSIGNATURE) {
oldgg = gp[pn];
if (gsetpid(pn))
gp[pn] = oldgg;
else if (memcmp(&gp[pn], &oldgg, sizeof(oldgg)))
return CMD_DIRTY;
} else {
oldprt = mbr->mbr_prt[pn];
if (setpid(pn, mbr))
mbr->mbr_prt[pn] = oldprt;
else if (memcmp(&mbr->mbr_prt[pn], &oldprt, sizeof(oldprt)))
return CMD_DIRTY;
}
return CMD_CONT;
}
int
Xselect(char *args, struct mbr *mbr)
{
static uint64_t lba_firstembr = 0;
uint64_t lba_self;
int pn;
pn = parsepn(args);
if (pn == -1)
return CMD_CONT;
lba_self = mbr->mbr_prt[pn].prt_bs;
if ((mbr->mbr_prt[pn].prt_id != DOSPTYP_EXTEND) &&
(mbr->mbr_prt[pn].prt_id != DOSPTYP_EXTENDL)) {
printf("Partition %d is not an extended partition.\n", pn);
return CMD_CONT;
}
if (lba_firstembr == 0)
lba_firstembr = lba_self;
if (lba_self == 0) {
printf("Loop to MBR (sector 0)! Not selected.\n");
return CMD_CONT;
} else {
printf("Selected extended partition %d\n", pn);
printf("New EMBR at offset %llu.\n", lba_self);
}
USER_edit(lba_self, lba_firstembr);
return CMD_CONT;
}
int
Xprint(char *args, struct mbr *mbr)
{
if (letoh64(gh.gh_sig) == GPTSIGNATURE)
GPT_print(args, VERBOSE);
else
MBR_print(mbr, args);
return CMD_CONT;
}
int
Xwrite(char *args, struct mbr *mbr)
{
int i, n;
for (i = 0, n = 0; i < NDOSPART; i++)
if (mbr->mbr_prt[i].prt_id == 0xA6)
n++;
if (n >= 2) {
warnx("MBR contains more than one OpenBSD partition!");
if (!ask_yn("Write MBR anyway?"))
return CMD_CONT;
}
if (letoh64(gh.gh_sig) == GPTSIGNATURE) {
printf("Writing GPT.\n");
if (GPT_write() == -1) {
warn("error writing GPT");
return CMD_CONT;
}
} else {
printf("Writing MBR at offset %lld.\n", (long long)mbr->mbr_lba_self);
if (MBR_write(mbr) == -1) {
warn("error writing MBR");
return CMD_CONT;
}
GPT_zap_headers();
}
return CMD_CLEAN;
}
int
Xquit(char *args, struct mbr *mbr)
{
return CMD_SAVE;
}
int
Xabort(char *args, struct mbr *mbr)
{
exit(0);
}
int
Xexit(char *args, struct mbr *mbr)
{
return CMD_EXIT;
}
int
Xhelp(char *args, struct mbr *mbr)
{
USER_help();
return CMD_CONT;
}
int
Xupdate(char *args, struct mbr *mbr)
{
memcpy(mbr->mbr_code, default_dmbr.dmbr_boot, sizeof(mbr->mbr_code));
mbr->mbr_signature = DOSMBR_SIGNATURE;
printf("Machine code updated.\n");
return CMD_DIRTY;
}
int
Xflag(char *args, struct mbr *mbr)
{
const char *errstr;
char *part, *flag;
long long val = -1;
int i, pn;
flag = args;
part = strsep(&flag, " \t");
pn = parsepn(part);
if (pn == -1)
return CMD_CONT;
if (flag != NULL) {
if (letoh64(gh.gh_sig) == GPTSIGNATURE)
val = strtonum(flag, 0, INT64_MAX, &errstr);
else
val = strtonum(flag, 0, 0xff, &errstr);
if (errstr) {
printf("flag value is %s: %s.\n", errstr, flag);
return CMD_CONT;
}
if (letoh64(gh.gh_sig) == GPTSIGNATURE)
gp[pn].gp_attrs = htole64(val);
else
mbr->mbr_prt[pn].prt_flag = val;
printf("Partition %d flag value set to 0x%llx.\n", pn, val);
} else {
if (letoh64(gh.gh_sig) == GPTSIGNATURE) {
for (i = 0; i < NGPTPARTITIONS; i++) {
if (i == pn)
gp[i].gp_attrs = htole64(GPTDOSACTIVE);
else
gp[i].gp_attrs = htole64(0);
}
} else {
for (i = 0; i < NDOSPART; i++) {
if (i == pn)
mbr->mbr_prt[i].prt_flag = DOSACTIVE;
else
mbr->mbr_prt[i].prt_flag = 0x00;
}
}
printf("Partition %d marked active.\n", pn);
}
return CMD_DIRTY;
}
int
Xmanual(char *args, struct mbr *mbr)
{
char *pager = "/usr/bin/less";
char *p;
FILE *f;
sig_t opipe;
opipe = signal(SIGPIPE, SIG_IGN);
if ((p = getenv("PAGER")) != NULL && (*p != '\0'))
pager = p;
if (asprintf(&p, "gunzip -qc|%s", pager) != -1) {
f = popen(p, "w");
if (f) {
fwrite(manpage, manpage_sz, 1, f);
pclose(f);
}
free(p);
}
signal(SIGPIPE, opipe);
return CMD_CONT;
}
int
ask_num(const char *str, int dflt, int low, int high)
{
char lbuf[100];
const char *errstr;
int num;
if (dflt < low)
dflt = low;
else if (dflt > high)
dflt = high;
do {
printf("%s [%d - %d]: [%d] ", str, low, high, dflt);
string_from_line(lbuf, sizeof(lbuf));
if (lbuf[0] == '\0') {
num = dflt;
errstr = NULL;
} else {
num = (int)strtonum(lbuf, low, high, &errstr);
if (errstr)
printf("%s is %s: %s.\n", str, errstr, lbuf);
}
} while (errstr);
return num;
}
int
ask_pid(const int dflt, struct uuid *guid)
{
char lbuf[100], *cp;
int num = -1, status;
do {
printf("Partition id ('0' to disable) [01 - FF]: [%X] ", dflt);
printf("(? for help) ");
string_from_line(lbuf, sizeof(lbuf));
if (lbuf[0] == '?') {
PRT_printall();
continue;
}
if (guid && strlen(lbuf) == UUID_STR_LEN) {
uuid_from_string(lbuf, guid, &status);
if (status == uuid_s_ok)
return 0x100;
}
/* Convert */
cp = lbuf;
num = strtol(lbuf, &cp, 16);
/* Make sure only number present */
if (cp == lbuf)
num = dflt;
if (*cp != '\0') {
printf("'%s' is not a valid number.\n", lbuf);
num = -1;
} else if (num == 0) {
break;
} else if (num < 0 || num > 0xff) {
printf("'%x' is out of range.\n", num);
}
} while (num < 0 || num > 0xff);
return num;
}
char *
ask_string(const char *prompt, const char *oval)
{
static char buf[UUID_STR_LEN + 1];
buf[0] = '\0';
printf("%s: [%s] ", prompt, oval ? oval : "");
string_from_line(buf, sizeof(buf));
if (buf[0] == '\0' && oval)
strlcpy(buf, oval, sizeof(buf));
return buf;
}
|