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NetBSD/distrib/utils/sysinst/label.c
dsl 81c71a86b4 Make compile with WARNS=3
2004-10-16 13:20:10 +00:00

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/* $NetBSD: label.c,v 1.45 2004/10/16 13:20:11 dsl Exp $ */
/*
* Copyright 1997 Jonathan Stone
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project by
* Jonathan Stone.
* 4. The name of Jonathan Stone may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY JONATHAN STONE ``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 PIERMONT INFORMATION SYSTEMS INC. 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 <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: label.c,v 1.45 2004/10/16 13:20:11 dsl Exp $");
#endif
#include <sys/types.h>
#include <stddef.h>
#include <errno.h>
#include <stdio.h>
#include <fcntl.h>
#include <util.h>
#include <unistd.h>
#include <sys/dkio.h>
#include <ufs/ffs/fs.h>
#include "defs.h"
#include "msg_defs.h"
#include "menu_defs.h"
struct ptn_menu_info {
int flags;
#define PIF_SHOW_UNUSED 1
};
/*
* local prototypes
*/
static int boringpart(partinfo *, int, int, int);
static int checklabel(partinfo *, int, int, int, int *, int *);
static void atofsb(const char *, int *, int *);
/*
* Return 1 if partition i in lp should be ignored when checking
* for overlapping partitions.
*/
static int
boringpart(partinfo *lp, int i, int rawpart, int bsdpart)
{
if (i == rawpart || i == bsdpart ||
lp[i].pi_fstype == FS_UNUSED || lp[i].pi_size == 0)
return 1;
return 0;
}
/*
* Check a sysinst label structure for overlapping partitions.
* Returns 0 if no overlapping partition found, nonzero otherwise.
* Sets reference arguments ovly1 and ovly2 to the indices of
* overlapping partitions if any are found.
*/
static int
checklabel(partinfo *lp, int nparts, int rawpart, int bsdpart,
int *ovly1, int *ovly2)
{
int i;
int j;
*ovly1 = -1;
*ovly2 = -1;
for (i = 0; i < nparts - 1; i ++ ) {
partinfo *ip = &lp[i];
int istart, istop;
/* skip unused or reserved partitions */
if (boringpart(lp, i, rawpart, bsdpart))
continue;
/*
* check succeeding partitions for overlap.
* O(n^2), but n is small (currently <= 16).
*/
istart = ip->pi_offset;
istop = istart + ip->pi_size;
for (j = i+1; j < nparts; j++) {
partinfo *jp = &lp[j];
int jstart, jstop;
/* skip unused or reserved partitions */
if (boringpart(lp, j, rawpart, bsdpart))
continue;
jstart = jp->pi_offset;
jstop = jstart + jp->pi_size;
/* overlap? */
if ((istart <= jstart && jstart < istop) ||
(jstart <= istart && istart < jstop)) {
*ovly1 = i;
*ovly2 = j;
return (1);
}
}
}
return (0);
}
static int
check_one_root(partinfo *lp, int nparts)
{
int part;
int foundroot = 0;
for (part = 0; part < nparts; lp++, part++) {
#if 0
if (!PI_ISBSDFS(lp))
continue;
#endif
if (!(lp->pi_flags & PIF_MOUNT))
continue;
if (strcmp(lp->pi_mount, "/") != 0)
continue;
if (foundroot)
/* Duplicate */
return 0;
foundroot = 1;
/* Save partition number, a few things need to know it */
rootpart = part;
}
return foundroot;
}
static int
edit_fs_start(menudesc *m, void *arg)
{
partinfo *p = arg;
int start, size;
start = getpartoff(p->pi_offset);
size = p->pi_size;
if (size != 0) {
/* Try to keep end in the same place */
size += p->pi_offset - start;
if (size < 0)
size = 0;
p->pi_size = size;
}
p->pi_offset = start;
return 0;
}
static int
edit_fs_size(menudesc *m, void *arg)
{
partinfo *p = arg;
int size;
size = getpartsize(p->pi_offset, p->pi_size);
if (size == -1)
size = dlsize - p->pi_offset;
p->pi_size = size;
return 0;
}
void
set_ptype(partinfo *p, int fstype, int flag, int bsize)
{
p->pi_fstype = fstype;
p->pi_flags = (p->pi_flags & ~PIF_FFSv2) | flag;
set_bsize(p, bsize);
}
void
set_bsize(partinfo *p, int size)
{
int frags, sz;
sz = p->pi_fsize;
if (sz <= 0)
sz = 512;
frags = size / sz;
if (frags > 8)
frags = 8;
if (frags <= 0)
frags = 1;
p->pi_frag = frags;
p->pi_fsize = size / frags;
}
void
set_fsize(partinfo *p, int fsize)
{
int bsz = p->pi_fsize * p->pi_frag;
int frags = bsz / fsize;
if (frags > 8)
frags = 8;
if (frags <= 0)
frags = 1;
p->pi_fsize = fsize;
p->pi_frag = frags;
}
static int
edit_fs_isize(menudesc *m, void *arg)
{
partinfo *p = arg;
char answer[12];
snprintf(answer, sizeof answer, "%u", p->pi_isize);
msg_prompt_win(MSG_fs_isize, -1, 18, 0, 0,
answer, answer, sizeof answer);
p->pi_isize = atol(answer);
return 0;
}
static int
edit_fs_preserve(menudesc *m, void *arg)
{
partinfo *p = arg;
p->pi_flags ^= PIF_NEWFS;
return 0;
}
static int
edit_fs_mount(menudesc *m, void *arg)
{
partinfo *p = arg;
p->pi_flags ^= PIF_MOUNT;
return 0;
}
static int
edit_fs_mountpt(menudesc *m, void *arg)
{
partinfo *p = arg;
msg_prompt_win(MSG_mountpoint, -1, 18, 0, 0,
p->pi_mount, p->pi_mount, sizeof p->pi_mount);
if (p->pi_mount[0] == ' ' || strcmp(p->pi_mount, "none") == 0) {
p->pi_mount[0] = 0;
return 0;
}
if (p->pi_mount[0] != '/') {
memmove(p->pi_mount + 1, p->pi_mount,
sizeof p->pi_mount - 1);
p->pi_mount[sizeof p->pi_mount - 1] = 0;
p->pi_mount[0] = '/';
}
return 0;
}
static int
edit_restore(menudesc *m, void *arg)
{
partinfo *p = arg;
p->pi_flags |= PIF_RESET;
return 1;
}
static int
set_fstype(menudesc *m, void *arg)
{
partinfo *p = arg;
if (m->cursel == FS_UNUSED)
memset(p, 0, sizeof *p);
else
p->pi_fstype = m->cursel;
return 1;
}
static void
get_fstype(menudesc *m, void *arg)
{
partinfo *p = arg;
m->cursel = p->pi_fstype;
}
static void set_ptn_header(menudesc *m, void *arg);
static void set_ptn_label(menudesc *m, int opt, void *arg);
int all_fstype_menu = -1;
static int
edit_ptn(menudesc *menu, void *arg)
{
static menu_ent fs_fields[] = {
#define PTN_MENU_FSKIND 0
{NULL, MENU_selfskind, OPT_SUB, NULL},
#define PTN_MENU_START 1
{NULL, OPT_NOMENU, 0, edit_fs_start},
#define PTN_MENU_SIZE 2
{NULL, OPT_NOMENU, 0, edit_fs_size},
#define PTN_MENU_END 3
{NULL, OPT_NOMENU, OPT_IGNORE, NULL}, /* displays 'end' */
#define PTN_MENU_NEWFS 4
{NULL, OPT_NOMENU, 0, edit_fs_preserve},
#define PTN_MENU_ISIZE 5
{NULL, OPT_NOMENU, 0, edit_fs_isize},
#define PTN_MENU_BSIZE 6
{NULL, MENU_selbsize, OPT_SUB, NULL},
#define PTN_MENU_FSIZE 7
{NULL, MENU_selfsize, OPT_SUB, NULL},
#define PTN_MENU_MOUNT 8
{NULL, OPT_NOMENU, 0, edit_fs_mount},
#define PTN_MENU_MOUNTOPT 9
{NULL, MENU_mountoptions, OPT_SUB, NULL},
#define PTN_MENU_MOUNTPT 10
{NULL, OPT_NOMENU, 0, edit_fs_mountpt},
{MSG_askunits, MENU_sizechoice, OPT_SUB, NULL},
{MSG_restore, OPT_NOMENU, 0, edit_restore},
};
static int fspart_menu = -1;
static menu_ent all_fstypes[FSMAXTYPES];
partinfo *p, p_save;
int i;
if (fspart_menu == -1) {
fspart_menu = new_menu(NULL, fs_fields, nelem(fs_fields),
0, -1, 0, 70,
MC_NOBOX | MC_NOCLEAR | MC_SCROLL,
set_ptn_header, set_ptn_label, NULL,
NULL, MSG_partition_sizes_ok);
}
if (all_fstype_menu == -1) {
for (i = 0; i < nelem(all_fstypes); i++) {
all_fstypes[i].opt_name = fstypenames[i];
all_fstypes[i].opt_menu = OPT_NOMENU;
all_fstypes[i].opt_flags = 0;
all_fstypes[i].opt_action = set_fstype;
}
all_fstype_menu = new_menu(MSG_Select_the_type,
all_fstypes, nelem(all_fstypes),
30, 6, 10, 0, MC_SUBMENU | MC_SCROLL,
get_fstype, NULL, NULL, NULL, MSG_unchanged);
}
p = bsdlabel + menu->cursel;
p->pi_flags &= ~PIF_RESET;
p_save = *p;
for (;;) {
process_menu(fspart_menu, p);
if (!(p->pi_flags & PIF_RESET))
break;
*p = p_save;
}
return 0;
}
static void
set_ptn_header(menudesc *m, void *arg)
{
partinfo *p = arg;
int i;
int t;
msg_clear();
msg_table_add(MSG_edfspart, 'a' + (p - bsdlabel));
/* Determine which of the properties can be changed */
for (i = PTN_MENU_START; i <= PTN_MENU_MOUNTPT; i++) {
/* Default to disabled... */
m->opts[i].opt_flags |= OPT_IGNORE;
t = p->pi_fstype;
if (i == PTN_MENU_END)
/* The 'end address' is calculated from the size */
continue;
if (t == FS_UNUSED || (t == FS_SWAP && i > PTN_MENU_END)) {
/* Nothing after 'size' can be set for swap/unused */
p->pi_flags &= ~(PIF_NEWFS | PIF_MOUNT);
p->pi_mount[0] = 0;
continue;
}
if (i == PTN_MENU_NEWFS && t != FS_BSDFFS && t != FS_BSDLFS
&& t != FS_APPLEUFS) {
/* Can only newfs UFS and LFS filesystems */
p->pi_flags &= ~PIF_NEWFS;
continue;
}
if (i >= PTN_MENU_ISIZE && i <= PTN_MENU_FSIZE) {
/* Parameters for newfs... */
if (!(p->pi_flags & PIF_NEWFS))
/* Not if we aren't going to run newfs */
continue;
if (t == FS_APPLEUFS && i != PTN_MENU_ISIZE)
/* Can only set # inodes for appleufs */
continue;
if (t == FS_BSDLFS && i == PTN_MENU_FSIZE)
/* LFS doesn't have fragments */
continue;
}
/* Ok: we want this one */
m->opts[i].opt_flags &= ~OPT_IGNORE;
}
}
static void
disp_sector_count(menudesc *m, msg fmt, uint s)
{
uint ms = MEG / sectorsize;
wprintw(m->mw, msg_string(fmt),
s / ms, s / dlcylsize, s % dlcylsize ? '*' : ' ', s );
}
static void
set_ptn_label(menudesc *m, int opt, void *arg)
{
partinfo *p = arg;
const char *c;
if (m->opts[opt].opt_flags & OPT_IGNORE
&& (opt != PTN_MENU_END || p->pi_fstype == FS_UNUSED)) {
wprintw(m->mw, " -");
return;
}
switch (opt) {
case PTN_MENU_FSKIND:
if (p->pi_fstype == FS_BSDFFS)
if (p->pi_flags & PIF_FFSv2)
c = "FFSv2";
else
c = "FFSv1";
else
c = fstypenames[p->pi_fstype];
wprintw(m->mw, msg_string(MSG_fstype_fmt), c);
break;
case PTN_MENU_START:
disp_sector_count(m, MSG_start_fmt, p->pi_offset);
break;
case PTN_MENU_SIZE:
disp_sector_count(m, MSG_size_fmt, p->pi_size);
break;
case PTN_MENU_END:
disp_sector_count(m, MSG_end_fmt, p->pi_offset + p->pi_size);
break;
case PTN_MENU_NEWFS:
wprintw(m->mw, msg_string(MSG_newfs_fmt),
msg_string(p->pi_flags & PIF_NEWFS ? MSG_Yes : MSG_No));
break;
case PTN_MENU_ISIZE:
wprintw(m->mw, msg_string(p->pi_isize > 0 ?
MSG_isize_fmt : MSG_isize_fmt_dflt), p->pi_isize);
break;
case PTN_MENU_BSIZE:
wprintw(m->mw, msg_string(MSG_bsize_fmt),
p->pi_fsize * p->pi_frag);
break;
case PTN_MENU_FSIZE:
wprintw(m->mw, msg_string(MSG_fsize_fmt), p->pi_fsize);
break;
case PTN_MENU_MOUNT:
wprintw(m->mw, msg_string(MSG_mount_fmt),
msg_string(p->pi_flags & PIF_MOUNT ? MSG_Yes : MSG_No));
break;
case PTN_MENU_MOUNTOPT:
wprintw(m->mw, msg_string(MSG_mount_options_fmt));
if (p->pi_flags & PIF_ASYNC)
wprintw(m->mw, "async ");
if (p->pi_flags & PIF_NOATIME)
wprintw(m->mw, "noatime ");
if (p->pi_flags & PIF_NODEV)
wprintw(m->mw, "nodev ");
if (p->pi_flags & PIF_NODEVMTIME)
wprintw(m->mw, "nodevmtime ");
if (p->pi_flags & PIF_NOEXEC)
wprintw(m->mw, "noexec ");
if (p->pi_flags & PIF_NOSUID)
wprintw(m->mw, "nosuid ");
if (p->pi_flags & PIF_SOFTDEP)
wprintw(m->mw, "softdep ");
break;
case PTN_MENU_MOUNTPT:
wprintw(m->mw, msg_string(MSG_mountpt_fmt), p->pi_mount);
break;
}
}
static int
show_all_unused(menudesc *m, void *arg)
{
struct ptn_menu_info *pi = arg;
pi->flags |= PIF_SHOW_UNUSED;
return 0;
}
static void
set_label_texts(menudesc *menu, void *arg)
{
struct ptn_menu_info *pi = arg;
menu_ent *m;
int ptn, show_unused_ptn;
int rawptn = getrawpartition();
int maxpart = getmaxpartitions();
msg_display(MSG_fspart);
msg_table_add(MSG_fspart_header, multname, multname, multname);
for (show_unused_ptn = 0, ptn = 0; ptn < maxpart; ptn++) {
m = &menu->opts[ptn];
m->opt_menu = OPT_NOMENU;
m->opt_name = NULL;
m->opt_action = edit_ptn;
if (ptn == rawptn
#ifdef PART_BOOT
|| ptn == PART_BOOT
#endif
|| ptn == PART_C) {
m->opt_flags = OPT_IGNORE;
} else {
m->opt_flags = 0;
if (bsdlabel[ptn].pi_fstype == FS_UNUSED)
continue;
}
show_unused_ptn = ptn + 2;
}
if (!(pi->flags & PIF_SHOW_UNUSED) && ptn > show_unused_ptn) {
ptn = show_unused_ptn;
m = &menu->opts[ptn];
m->opt_name = MSG_show_all_unused_partitions;
m->opt_action = show_all_unused;
ptn++;
}
m = &menu->opts[ptn];
m->opt_menu = MENU_sizechoice;
m->opt_flags = OPT_SUB;
m->opt_action = NULL;
m->opt_name = MSG_askunits;
menu->numopts = ptn + 1;
}
/*
* Check a disklabel.
* If there are overlapping active partitions,
* Ask the user if they want to edit the partition or give up.
*/
int
edit_and_check_label(partinfo *lp, int nparts, int rawpart, int bsdpart)
{
static struct menu_ent *menu;
static int menu_no = -1;
static struct ptn_menu_info pi;
int maxpart = getmaxpartitions();
if (menu == NULL) {
menu = malloc((maxpart + 1) * sizeof *menu);
if (!menu)
return 1;
}
if (menu_no == -1) {
menu_no = new_menu(NULL, menu, maxpart + 1,
0, -1, maxpart + 2, 74,
MC_ALWAYS_SCROLL | MC_NOBOX | MC_DFLTEXIT,
set_label_texts, fmt_fspart, NULL, NULL,
MSG_partition_sizes_ok);
}
if (menu_no < 0)
return 1;
pi.flags = 0;
current_cylsize = dlcylsize;
for (;;) {
int i, j;
/* first give the user the option to edit the label... */
process_menu(menu_no, &pi);
/* User thinks the label is OK. */
/* check we have a single root fs */
if (check_one_root(lp, nparts) == 0)
msg_display(MSG_must_be_one_root);
else
/* Check for overlaps */
if (checklabel(lp, nparts, rawpart, bsdpart, &i, &j))
/* partitions overlap */
msg_display(MSG_partitions_overlap,'a'+i,'a'+j);
else
return 1;
/*XXX ???*/
msg_display_add(MSG_edit_partitions_again);
process_menu(MENU_yesno, NULL);
if (!yesno)
return(0);
}
/*NOTREACHED*/
}
/*
* Read a label from disk into a sysinst label structure.
*/
int
incorelabel(const char *dkname, partinfo *lp)
{
struct disklabel lab;
int i, maxpart;
struct partition *pp;
int fd;
char buf[64];
if (get_real_geom(dkname, &lab) == 0)
return -1;
touchwin(stdscr);
maxpart = getmaxpartitions();
if (maxpart > MAXPARTITIONS)
maxpart = MAXPARTITIONS;
if (maxpart > lab.d_npartitions)
maxpart = lab.d_npartitions;
/*
* Historically sysinst writes the name to d_typename rather
* than d_diskname. Who knows why, but pull the value back here.
*/
if (lab.d_typename[0] != 0 && strcmp(lab.d_typename, "unknown") != 0)
strlcpy(bsddiskname, lab.d_typename, sizeof bsddiskname);
fd = opendisk(dkname, O_RDONLY, buf, sizeof buf, 0);
pp = &lab.d_partitions[0];
for (i = 0; i < maxpart; lp++, pp++, i++) {
lp->pi_partition = *pp;
if (lp->pi_fstype >= FSMAXTYPES)
lp->pi_fstype = FS_OTHER;
strlcpy(lp->pi_mount, get_last_mounted(fd, pp->p_offset),
sizeof lp->pi_mount);
}
if (fd != -1)
close(fd);
return 0;
}
/*
* Try to get 'last mounted on' (or equiv) from fs superblock.
*/
const char *
get_last_mounted(int fd, int partstart)
{
static char sblk[SBLOCKSIZE]; /* is this enough? */
#define SB ((struct fs *)sblk)
const static int sblocks[] = SBLOCKSEARCH;
const int *sbp;
char *cp;
const char *mnt = "";
int l;
if (fd == -1)
return mnt;
/* Check UFS1/2 (and hence LFS) superblock */
for (sbp = sblocks; *mnt == 0 && *sbp != -1; sbp++) {
if (pread(fd, sblk, sizeof sblk,
partstart * (off_t)512 + *sbp) != sizeof sblk)
continue;
/* Maybe we should validate the checksum??? */
switch (((struct fs *)sblk)->fs_magic) {
case FS_UFS1_MAGIC:
case FS_UFS1_MAGIC_SWAPPED:
if (!(SB->fs_old_flags & FS_FLAGS_UPDATED)) {
if (*sbp == SBLOCK_UFS1)
mnt = SB->fs_fsmnt;
continue;
}
/* FALLTHROUGH */
case FS_UFS2_MAGIC:
case FS_UFS2_MAGIC_SWAPPED:
/* Check we have the main superblock */
if (SB->fs_sblockloc == *sbp)
mnt = SB->fs_fsmnt;
continue;
}
#if 0 /* Requires fs/ext2fs/ext2fs.h which collides badly... */
if ((struct ext2fs *)sblk)->e2fs_magic == E2FS_MAGIC) {
mnt = ((struct ext2fs *)sblk)->e2fs_fsmnt;
continue;
}
#endif
if (*sbp != 0)
continue;
/* If start of partition check for other fs types */
if (sblk[0x42] == 0x29 && memcmp(sblk + 0x52, "FAT", 3) == 0) {
/* Probably a FAT filesystem, report volume name */
cp = strchr(sblk + 0x47, ' ');
if (cp == NULL || cp - (sblk + 0x47) > 11)
cp = sblk + 0x47 + 11;
*cp = 0;
return sblk + 0x47;
}
}
/* If sysinst mounted this last then strip prefix */
l = strlen(targetroot_mnt);
if (memcmp(mnt, targetroot_mnt, l) == 0) {
if (mnt[l] == 0)
return "/";
if (mnt[l] == '/')
return mnt + l;
}
return mnt;
#undef SB
}
/* Ask for a partition offset, check bounds and do the needed roundups */
int
getpartoff(int defpartstart)
{
char defsize[20], isize[20], maxpartc;
int i, localsizemult, partn;
const char *errmsg = "\n";
maxpartc = 'a' + getmaxpartitions() - 1;
for (;;) {
snprintf(defsize, sizeof defsize, "%d", defpartstart/sizemult);
msg_prompt_win(MSG_label_offset, -1, 13, 70, 9,
(defpartstart > 0) ? defsize : NULL, isize, sizeof isize,
errmsg, maxpartc, maxpartc, multname);
if (strcmp(defsize, isize) == 0)
/* Don't do rounding if default accepted */
return defpartstart;
if (isize[1] == '\0' && isize[0] >= 'a' &&
isize[0] <= maxpartc) {
partn = isize[0] - 'a';
i = bsdlabel[partn].pi_size + bsdlabel[partn].pi_offset;
localsizemult = 1;
} else if (atoi(isize) == -1) {
i = ptstart;
localsizemult = 1;
} else
atofsb(isize, &i, &localsizemult);
if (i < 0) {
errmsg = msg_string(MSG_invalid_sector_number);
continue;
}
/* round to cylinder size if localsizemult != 1 */
i = NUMSEC(i/localsizemult, localsizemult, dlcylsize);
/* Adjust to start of slice if needed */
if ((i < ptstart && (ptstart - i) < localsizemult) ||
(i > ptstart && (i - ptstart) < localsizemult)) {
i = ptstart;
}
if (i <= dlsize)
break;
errmsg = msg_string(MSG_startoutsidedisk);
}
return i;
}
/* Ask for a partition size, check bounds and do the needed roundups */
int
getpartsize(int partstart, int defpartsize)
{
char dsize[20], isize[20], maxpartc;
const char *errmsg = "\n";
int i, partend, localsizemult;
int fsptend = ptstart + ptsize;
int partn;
maxpartc = 'a' + getmaxpartitions() - 1;
for (;;) {
snprintf(dsize, sizeof dsize, "%d", defpartsize/sizemult);
msg_prompt_win(MSG_label_size, -1, 12, 70, 9,
(defpartsize != 0) ? dsize : 0, isize, sizeof isize,
errmsg, maxpartc, multname);
if (strcmp(isize, dsize) == 0)
return defpartsize;
if (isize[1] == '\0' && isize[0] >= 'a' &&
isize[0] <= maxpartc) {
partn = isize[0] - 'a';
i = bsdlabel[partn].pi_offset - partstart;
localsizemult = 1;
} else if (atoi(isize) == -1) {
i = fsptend - partstart;
localsizemult = 1;
} else
atofsb(isize, &i, &localsizemult);
if (i < 0) {
errmsg = msg_string(MSG_invalid_sector_number);
continue;
}
/*
* partend is aligned to a cylinder if localsizemult
* is not 1 sector
*/
partend = NUMSEC((partstart + i) / localsizemult,
localsizemult, dlcylsize);
/* Align to end-of-disk or end-of-slice if close enough */
i = dlsize - partend;
if (i > -localsizemult && i < localsizemult)
partend = dlsize;
i = fsptend - partend;
if (i > -localsizemult && i < localsizemult)
partend = fsptend;
/* sanity checks */
if (partend > dlsize) {
partend = dlsize;
msg_prompt_win(MSG_endoutsidedisk, -1, 13, 70, 6,
NULL, isize, 1,
(partend - partstart) / sizemult, multname);
}
/* return value */
return (partend - partstart);
}
/* NOTREACHED */
}
/*
* convert a string to a number of sectors, with a possible unit
* 150M = 150 Megabytes
* 2000c = 2000 cylinders
* 150256s = 150256 sectors
* Without units, use the default (sizemult)
* returns the number of sectors, and the unit used (for roundups).
*/
static void
atofsb(const char *str, int *p_val, int *localsizemult)
{
int i;
int val;
*localsizemult = sizemult;
if (str[0] == '\0') {
*p_val = -1;
return;
}
val = 0;
for (i = 0; str[i] != '\0'; i++) {
if (str[i] >= '0' && str[i] <= '9') {
val = val * 10 + str[i] - '0';
continue;
}
if (str[i + 1] != '\0') {
/* A non-digit caracter, not at the end */
*p_val = -1;
return;
}
if (str[i] == 'G' || str[i] == 'g') {
val *= 1024;
*localsizemult = MEG / sectorsize;
break;
}
if (str[i] == 'M' || str[i] == 'm') {
*localsizemult = MEG / sectorsize;
break;
}
if (str[i] == 'c') {
*localsizemult = dlcylsize;
break;
}
if (str[i] == 's') {
*localsizemult = 1;
break;
}
/* not a known unit */
*p_val = -1;
return;
}
*p_val = val * (*localsizemult);
return;
}
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