+++ /dev/null
-/* vi: set sw=4 ts=4: */
-/*
- * sfdisk version 3.0 - aeb - 950813
- *
- * Copyright (C) 1995 Andries E. Brouwer (aeb@cwi.nl)
- *
- * This program is free software. You can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation: either Version 1
- * or (at your option) any later version.
- *
- * A.V. Le Blanc (LeBlanc@mcc.ac.uk) wrote Linux fdisk 1992-1994,
- * patched by various people (faith@cs.unc.edu, martin@cs.unc.edu,
- * leisner@sdsp.mc.xerox.com, esr@snark.thyrsus.com, aeb@cwi.nl)
- * 1993-1995, with version numbers (as far as I have seen) 0.93 - 2.0e.
- * This program had (head,sector,cylinder) as basic unit, and was
- * (therefore) broken in several ways for the use on larger disks -
- * for example, my last patch (from 2.0d to 2.0e) was required
- * to allow a partition to cross cylinder 8064, and to write an
- * extended partition past the 4GB mark.
- *
- * The current program is a rewrite from scratch, and I started a
- * version numbering at 3.0.
- * Andries Brouwer, aeb@cwi.nl, 950813
- *
- * Well, a good user interface is still lacking. On the other hand,
- * many configurations cannot be handled by any other fdisk.
- * I changed the name to sfdisk to prevent confusion. - aeb, 970501
- *
- * Changes:
- * 19990319 - Arnaldo Carvalho de Melo <acme@conectiva.com.br> - i18n
- *
- * busyboxed by Erik Andersen <andersee@debian.org> -- I stipped out
- * all the NLS, pulled in some includes, and made stuff smaller...
- */
-
-#define PROGNAME "sfdisk"
-#define VERSION "3.07"
-#define DATE "990908"
-
-#include "internal.h"
-#include <stdio.h>
-#include <stdlib.h> /* atoi, free */
-#include <stdarg.h> /* varargs */
-#include <unistd.h> /* read, write */
-#include <fcntl.h> /* O_RDWR */
-#include <errno.h> /* ERANGE */
-#include <string.h> /* index() */
-#include <ctype.h>
-#include <getopt.h>
-#include <sys/ioctl.h>
-#include <sys/stat.h>
-#include <linux/unistd.h> /* _syscall */
-#include <linux/hdreg.h> /* HDIO_GETGEO */
-#include <linux/fs.h> /* BLKGETSIZE */
-
-#define BB_DECLARE_EXTERN
-#define bb_need_memory_exhausted
-#include "messages.c"
-
-static const char sfdisk_usage[] =
- "sfdisk [options] device ...\n"
-#ifndef BB_FEATURE_TRIVIAL_HELP
- "\ndevice: something like /dev/hda or /dev/sda\n"
- "useful options:\n"
- " -s [or --show-size]: list size of a partition\n"
- " -c [or --id]: print or change partition Id\n"
- " -l [or --list]: list partitions of each device\n"
- " -d [or --dump]: idem, but in a format suitable for later input\n"
- " -i [or --increment]: number cylinders etc. from 1 instead of from 0\n"
- " -uS, -uB, -uC, -uM: accept/report in units of sectors/blocks/cylinders/MB\n"
- " -T [or --list-types]:list the known partition types\n"
- " -D [or --DOS]: for DOS-compatibility: waste a little space\n"
- " -R [or --re-read]: make kernel reread partition table\n"
- " -N# : change only the partition with number #\n"
- " -n : do not actually write to disk\n"
- " -O file : save the sectors that will be overwritten to file\n"
- " -I file : restore these sectors again\n"
- " -v [or --version]: print version\n"
- " -? [or --help]: print this message\n"
- "dangerous options:\n"
- " -g [or --show-geometry]: print the kernel's idea of the geometry\n"
- " -x [or --show-extended]: also list extended partitions on output\n\n"
- " or expect descriptors for them on input\n"
- " -L [or --Linux]: do not complain about things irrelevant for Linux\n"
- " -q [or --quiet]: suppress warning messages\n"
- " You can override the detected geometry using:\n"
- " -C# [or --cylinders #]:set the number of cylinders to use\n"
- " -H# [or --heads #]: set the number of heads to use\n"
- " -S# [or --sectors #]: set the number of sectors to use\n"
-
- "You can disable all consistency checking with:\n"
- " -f [or --force]: do what I say, even if it is stupid\n"
-#endif
- ;
-
-
-
-/* common stuff for fdisk, cfdisk, sfdisk */
-struct systypes {
- unsigned char type;
- char *name;
-};
-
-static struct systypes i386_sys_types[] = {
- {0x00, "Empty"},
- {0x01, "FAT12"},
- {0x02, "XENIX root"},
- {0x03, "XENIX usr"},
- {0x04, "FAT16 <32M"},
- {0x05, "Extended"}, /* DOS 3.3+ extended partition */
- {0x06, "FAT16"}, /* DOS 16-bit >=32M */
- {0x07, "HPFS/NTFS"}, /* OS/2 IFS, eg, HPFS or NTFS or QNX */
- {0x08, "AIX"}, /* AIX boot (AIX -- PS/2 port or SplitDrive) */
- {0x09, "AIX bootable"}, /* AIX data or Coherent */
- {0x0a, "OS/2 Boot Manager"}, /* OS/2 Boot Manager */
- {0x0b, "Win95 FAT32"},
- {0x0c, "Win95 FAT32 (LBA)"}, /* LBA really is `Extended Int 13h' */
- {0x0e, "Win95 FAT16 (LBA)"},
- {0x0f, "Win95 Ext'd (LBA)"},
- {0x10, "OPUS"},
- {0x11, "Hidden FAT12"},
- {0x12, "Compaq diagnostics"},
- {0x14, "Hidden FAT16 <32M"},
- {0x16, "Hidden FAT16"},
- {0x17, "Hidden HPFS/NTFS"},
- {0x18, "AST Windows swapfile"},
- {0x1b, "Hidden Win95 FAT32"},
- {0x1c, "Hidden Win95 FAT32 (LBA)"},
- {0x1e, "Hidden Win95 FAT16 (LBA)"},
- {0x24, "NEC DOS"},
- {0x3c, "PartitionMagic recovery"},
- {0x40, "Venix 80286"},
- {0x41, "PPC PReP Boot"},
- {0x42, "SFS"},
- {0x4d, "QNX4.x"},
- {0x4e, "QNX4.x 2nd part"},
- {0x4f, "QNX4.x 3rd part"},
- {0x50, "OnTrack DM"},
- {0x51, "OnTrack DM6 Aux1"}, /* (or Novell) */
- {0x52, "CP/M"}, /* CP/M or Microport SysV/AT */
- {0x53, "OnTrack DM6 Aux3"},
- {0x54, "OnTrackDM6"},
- {0x55, "EZ-Drive"},
- {0x56, "Golden Bow"},
- {0x5c, "Priam Edisk"},
- {0x61, "SpeedStor"},
- {0x63, "GNU HURD or SysV"}, /* GNU HURD or Mach or Sys V/386 (such as ISC UNIX) */
- {0x64, "Novell Netware 286"},
- {0x65, "Novell Netware 386"},
- {0x70, "DiskSecure Multi-Boot"},
- {0x75, "PC/IX"},
- {0x80, "Old Minix"}, /* Minix 1.4a and earlier */
- {0x81, "Minix / old Linux"}, /* Minix 1.4b and later */
- {0x82, "Linux swap"}, /* also Solaris */
- {0x83, "Linux"},
- {0x84, "OS/2 hidden C: drive"},
- {0x85, "Linux extended"},
- {0x86, "NTFS volume set"},
- {0x87, "NTFS volume set"},
- {0x93, "Amoeba"},
- {0x94, "Amoeba BBT"}, /* (bad block table) */
- {0xa0, "IBM Thinkpad hibernation"},
- {0xa5, "BSD/386"},
- {0xa6, "OpenBSD"},
- {0xa7, "NeXTSTEP"},
- {0xb7, "BSDI fs"},
- {0xb8, "BSDI swap"},
- {0xc1, "DRDOS/sec (FAT-12)"},
- {0xc4, "DRDOS/sec (FAT-16 < 32M)"},
- {0xc6, "DRDOS/sec (FAT-16)"},
- {0xc7, "Syrinx"},
- {0xdb, "CP/M / CTOS / ..."}, /* CP/M or Concurrent CP/M or Concurrent DOS or CTOS */
- {0xe1, "DOS access"}, /* DOS access or SpeedStor 12-bit FAT extended partition */
- {0xe3, "DOS R/O"}, /* DOS R/O or SpeedStor */
- {0xe4, "SpeedStor"}, /* SpeedStor 16-bit FAT extended partition < 1024 cyl. */
- {0xeb, "BeOS fs"},
- {0xf1, "SpeedStor"},
- {0xf4, "SpeedStor"}, /* SpeedStor large partition */
- {0xf2, "DOS secondary"}, /* DOS 3.3+ secondary */
- {0xfd, "Linux raid autodetect"}, /* New (2.2.x) raid partition with autodetect
- using persistent superblock */
- {0xfe, "LANstep"}, /* SpeedStor >1024 cyl. or LANstep */
- {0xff, "BBT"}, /* Xenix Bad Block Table */
- {0, 0}
-};
-
-#define SIZE(a) (sizeof(a)/sizeof(a[0]))
-
-/*
- * Table of contents:
- * A. About seeking
- * B. About sectors
- * C. About heads, sectors and cylinders
- * D. About system Ids
- * E. About partitions
- * F. The standard input
- * G. The command line
- * H. Listing the current situation
- * I. Writing the new situation
- */
-static int exit_status = 0;
-
-static int force = 0; /* 1: do what I say, even if it is stupid ... */
-static int quiet = 0; /* 1: suppress all warnings */
-static int Linux = 0; /* 1: suppress warnings irrelevant for Linux */
-static int DOS = 0; /* 1: shift extended partitions by #sectors, not 1 */
-static int dump = 0; /* 1: list in a format suitable for later input */
-static int verify = 0; /* 1: check that listed partition is reasonable */
-static int no_write = 0; /* 1: do not actually write to disk */
-static int no_reread = 0; /* 1: skip the BLKRRPART ioctl test at startup */
-static int leave_last = 0; /* 1: don't allocate the last cylinder */
-static int opt_list = 0;
-static char *save_sector_file = NULL;
-static char *restore_sector_file = NULL;
-
-static void warn(char *s, ...) __attribute__ ((format (printf, 1, 2)));
-static void warn(char *s, ...)
-{
- va_list p;
-
- va_start(p, s);
- fflush(stdout);
- if (!quiet)
- vfprintf(stderr, s, p);
- va_end(p);
-}
-
-/*
- * A. About seeking
- */
-
-/*
- * sseek: seek to specified sector - return 0 on failure
- *
- * For >4GB disks lseek needs a > 32bit arg, and we have to use llseek.
- * On the other hand, a 32 bit sector number is OK until 2TB.
- * The routines _llseek and sseek below are the only ones that
- * know about the loff_t type.
- */
-#ifndef __alpha__
-static
-_syscall5(int, _llseek, uint, fd, ulong, hi, ulong, lo,
- loff_t *, res, uint, wh);
-#endif
-
-static int sseek(char *dev, unsigned int fd, unsigned long s)
-{
- loff_t in, out;
-
- in = ((loff_t) s << 9);
- out = 1;
-
-#ifndef __alpha__
- if (_llseek(fd, in >> 32, in & 0xffffffff, &out, SEEK_SET) != 0) {
-#else
- if ((out = lseek(fd, in, SEEK_SET)) != in) {
-#endif
- perror("llseek");
- errorMsg("seek error on %s - cannot seek to %lu\n", dev, s);
- return 0;
- }
-
- if (in != out) {
- errorMsg("seek error: wanted 0x%08x%08x, got 0x%08x%08x\n",
- (uint) (in >> 32), (uint) (in & 0xffffffff),
- (uint) (out >> 32), (uint) (out & 0xffffffff));
- return 0;
- }
- return 1;
-}
-
-/*
- * B. About sectors
- */
-
-/*
- * We preserve all sectors read in a chain - some of these will
- * have to be modified and written back.
- */
-struct sector {
- struct sector *next;
- unsigned long sectornumber;
- int to_be_written;
- char data[512];
-} *sectorhead;
-
-static void free_sectors(void)
-{
- struct sector *s;
-
- while (sectorhead) {
- s = sectorhead;
- sectorhead = s->next;
- free(s);
- }
-}
-
-static struct sector *get_sector(char *dev, int fd, unsigned long sno)
-{
- struct sector *s;
-
- for (s = sectorhead; s; s = s->next)
- if (s->sectornumber == sno)
- return s;
-
- if (!sseek(dev, fd, sno))
- return 0;
-
- s = (struct sector *) xmalloc(sizeof(struct sector));
-
- if (read(fd, s->data, sizeof(s->data)) != sizeof(s->data)) {
- perror("read");
- errorMsg("read error on %s - cannot read sector %lu\n", dev, sno);
- free(s);
- return 0;
- }
-
- s->next = sectorhead;
- sectorhead = s;
- s->sectornumber = sno;
- s->to_be_written = 0;
-
- return s;
-}
-
-static int msdos_signature(struct sector *s)
-{
- if (*(unsigned short *) (s->data + 0x1fe) != 0xaa55) {
- errorMsg("ERROR: sector %lu does not have an msdos signature\n",
- s->sectornumber);
- return 0;
- }
- return 1;
-}
-
-static int write_sectors(char *dev, int fd)
-{
- struct sector *s;
-
- for (s = sectorhead; s; s = s->next)
- if (s->to_be_written) {
- if (!sseek(dev, fd, s->sectornumber))
- return 0;
- if (write(fd, s->data, sizeof(s->data)) != sizeof(s->data)) {
- perror("write");
- errorMsg("write error on %s - cannot write sector %lu\n",
- dev, s->sectornumber);
- return 0;
- }
- s->to_be_written = 0;
- }
- return 1;
-}
-
-static void ulong_to_chars(unsigned long u, char *uu)
-{
- int i;
-
- for (i = 0; i < 4; i++) {
- uu[i] = (u & 0xff);
- u >>= 8;
- }
-}
-
-static unsigned long chars_to_ulong(unsigned char *uu)
-{
- int i;
- unsigned long u = 0;
-
- for (i = 3; i >= 0; i--)
- u = (u << 8) | uu[i];
- return u;
-}
-
-static int save_sectors(char *dev, int fdin)
-{
- struct sector *s;
- char ss[516];
- int fdout;
-
- fdout = open(save_sector_file, O_WRONLY | O_CREAT, 0444);
- if (fdout < 0) {
- perror(save_sector_file);
- errorMsg("cannot open partition sector save file (%s)\n",
- save_sector_file);
- return 0;
- }
-
- for (s = sectorhead; s; s = s->next)
- if (s->to_be_written) {
- ulong_to_chars(s->sectornumber, ss);
- if (!sseek(dev, fdin, s->sectornumber))
- return 0;
- if (read(fdin, ss + 4, 512) != 512) {
- perror("read");
- errorMsg("read error on %s - cannot read sector %lu\n",
- dev, s->sectornumber);
- return 0;
- }
- if (write(fdout, ss, sizeof(ss)) != sizeof(ss)) {
- perror("write");
- errorMsg("write error on %s\n", save_sector_file);
- return 0;
- }
- }
- return 1;
-}
-
-static void reread_disk_partition(char *dev, int fd);
-
-static int restore_sectors(char *dev)
-{
- int fdin, fdout, ct;
- struct stat statbuf;
- char *ss0, *ss;
- unsigned long sno;
-
- if (stat(restore_sector_file, &statbuf) < 0) {
- perror(restore_sector_file);
- errorMsg("cannot stat partition restore file (%s)\n",
- restore_sector_file);
- return 0;
- }
- if (statbuf.st_size % 516) {
- errorMsg("partition restore file has wrong size - not restoring\n");
- return 0;
- }
- if (!(ss = (char *) malloc(statbuf.st_size))) {
- errorMsg(memory_exhausted, "sfdisk");
- return 0;
- }
- fdin = open(restore_sector_file, O_RDONLY);
- if (fdin < 0) {
- perror(restore_sector_file);
- errorMsg("cannot open partition restore file (%s)\n",
- restore_sector_file);
- return 0;
- }
- if (read(fdin, ss, statbuf.st_size) != statbuf.st_size) {
- perror("read");
- errorMsg("error reading %s\n", restore_sector_file);
- return 0;
- }
-
- fdout = open(dev, O_WRONLY);
- if (fdout < 0) {
- perror(dev);
- errorMsg("cannot open device %s for writing\n", dev);
- return 0;
- }
-
- ss0 = ss;
- ct = statbuf.st_size / 516;
- while (ct--) {
- sno = chars_to_ulong(ss);
- if (!sseek(dev, fdout, sno))
- return 0;
- if (write(fdout, ss + 4, 512) != 512) {
- perror(dev);
- errorMsg("error writing sector %lu on %s\n", sno, dev);
- return 0;
- }
- ss += 516;
- }
- free(ss0);
-
- reread_disk_partition(dev, fdout);
-
- return 1;
-}
-
-/*
- * C. About heads, sectors and cylinders
- */
-
-/*
- * <linux/hdreg.h> defines HDIO_GETGEO and
- * struct hd_geometry {
- * unsigned char heads;
- * unsigned char sectors;
- * unsigned short cylinders;
- * unsigned long start;
- * };
- */
-
-/*
- * We consider several geometries for a disk:
- * B - the BIOS geometry, gotten from the kernel via HDIO_GETGEO
- * F - the fdisk geometry
- * U - the user-specified geometry
- *
- * 0 means unspecified / unknown
- */
-struct geometry {
- unsigned long cylindersize;
- unsigned long heads, sectors, cylinders;
-} B, F, U;
-
-static void get_cylindersize(char *dev, int fd, int silent)
-{
- struct hd_geometry g;
- int ioctl_ok = 0;
-
- B.heads = B.sectors = B.cylinders = 0;
-
- if (!ioctl(fd, HDIO_GETGEO, &g)) {
- ioctl_ok = 1;
-
- B.heads = g.heads;
- B.sectors = g.sectors;
- B.cylinders = g.cylinders;
- }
-
- if (U.heads)
- B.heads = U.heads;
- if (U.sectors)
- B.sectors = U.sectors;
- if (U.cylinders)
- B.cylinders = U.cylinders;
-
- B.cylindersize = B.heads * B.sectors;
-
- if (ioctl_ok) {
- if (g.start && !force) {
- warn
- ("Warning: start=%ld - this looks like a partition rather than\n"
- "the entire disk. Using fdisk on it is probably meaningless.\n"
- "[Use the --force option if you really want this]\n",
- g.start);
- exit(1);
- }
- if (B.heads != g.heads)
- warn("Warning: HDIO_GETGEO says that there are %d heads\n",
- g.heads);
- if (B.sectors != g.sectors)
- warn("Warning: HDIO_GETGEO says that there are %d sectors\n",
- g.sectors);
- if (B.cylinders != g.cylinders)
- warn("Warning: HDIO_GETGEO says that there are %d cylinders\n",
- g.cylinders);
- } else if (!silent)
- if (!B.heads || !B.sectors || !B.cylinders)
- printf("Disk %s: cannot get geometry\n", dev);
- if (B.sectors > 63)
- warn
- ("Warning: unlikely number of sectors (%ld - usually at most 63\n"
- "This will give problems with all software that uses C/H/S addressing.\n",
- B.sectors);
- if (!silent)
- printf("\nDisk %s: %lu cylinders, %lu heads, %lu sectors/track\n",
- dev, B.cylinders, B.heads, B.sectors);
-}
-
-typedef struct {
- unsigned char h, s, c;
-} chs; /* has some c bits in s */
-static chs zero_chs = { 0, 0, 0 };
-
-typedef struct {
- unsigned long h, s, c;
-} longchs;
-static longchs zero_longchs;
-
-static chs longchs_to_chs(longchs aa, struct geometry G)
-{
- chs a;
-
- if (aa.h < 256 && aa.s < 64 && aa.c < 1024) {
- a.h = aa.h;
- a.s = aa.s | ((aa.c >> 2) & 0xc0);
- a.c = (aa.c & 0xff);
- } else if (G.heads && G.sectors) {
- a.h = G.heads - 1;
- a.s = G.sectors | 0xc0;
- a.c = 0xff;
- } else
- a = zero_chs;
- return a;
-}
-
-static longchs chs_to_longchs(chs a)
-{
- longchs aa;
-
- aa.h = a.h;
- aa.s = (a.s & 0x3f);
- aa.c = (a.s & 0xc0);
- aa.c = (aa.c << 2) + a.c;
- return aa;
-}
-
-static longchs ulong_to_longchs(unsigned long sno, struct geometry G)
-{
- longchs aa;
-
- if (G.heads && G.sectors && G.cylindersize) {
- aa.s = 1 + sno % G.sectors;
- aa.h = (sno / G.sectors) % G.heads;
- aa.c = sno / G.cylindersize;
- return aa;
- } else {
- return zero_longchs;
- }
-}
-
-//static unsigned long
-//longchs_to_ulong (longchs aa, struct geometry G) {
-// return (aa.c*G.cylindersize + aa.h*G.sectors + aa.s - 1);
-//}
-
-static chs ulong_to_chs(unsigned long sno, struct geometry G)
-{
- return longchs_to_chs(ulong_to_longchs(sno, G), G);
-}
-
-//static unsigned long
-//chs_to_ulong (chs a, struct geometry G) {
-// return longchs_to_ulong(chs_to_longchs(a), G);
-//}
-
-static int is_equal_chs(chs a, chs b)
-{
- return (a.h == b.h && a.s == b.s && a.c == b.c);
-}
-
-static int chs_ok(chs a, char *v, char *w)
-{
- longchs aa = chs_to_longchs(a);
- int ret = 1;
-
- if (is_equal_chs(a, zero_chs))
- return 1;
- if (B.heads && aa.h >= B.heads) {
- warn("%s of partition %s has impossible value for head: "
- "%ld (should be in 0-%ld)\n", w, v, aa.h, B.heads - 1);
- ret = 0;
- }
- if (B.sectors && (aa.s == 0 || aa.s > B.sectors)) {
- warn("%s of partition %s has impossible value for sector: "
- "%ld (should be in 1-%ld)\n", w, v, aa.s, B.sectors);
- ret = 0;
- }
- if (B.cylinders && aa.c >= B.cylinders) {
- warn("%s of partition %s has impossible value for cylinders: "
- "%ld (should be in 0-%ld)\n", w, v, aa.c, B.cylinders - 1);
- ret = 0;
- }
- return ret;
-}
-
-/*
- * D. About system Ids
- */
-
-#define EMPTY_PARTITION 0
-#define EXTENDED_PARTITION 5
-#define WIN98_EXTENDED 0x0f
-#define DM6_AUX1PARTITION 0x51
-#define DM6_AUX3PARTITION 0x53
-#define DM6_PARTITION 0x54
-#define EZD_PARTITION 0x55
-#define LINUX_SWAP 0x82
-#define LINUX_NATIVE 0x83
-#define LINUX_EXTENDED 0x85
-#define BSD_PARTITION 0xa5
-
-/* List of partition types now in i386_sys_types.c */
-
-static const char *sysname(unsigned char type)
-{
- struct systypes *s;
-
- for (s = i386_sys_types; s->name; s++)
- if (s->type == type)
- return s->name;
- return "Unknown";
-}
-
-static void list_types(void)
-{
- struct systypes *s;
-
- printf("Id Name\n\n");
- for (s = i386_sys_types; s->name; s++)
- printf("%2x %s\n", s->type, s->name);
-}
-
-static int is_extended(unsigned char type)
-{
- return (type == EXTENDED_PARTITION
- || type == LINUX_EXTENDED || type == WIN98_EXTENDED);
-}
-
-static int is_bsd(unsigned char type)
-{
- return (type == BSD_PARTITION);
-}
-
-/*
- * E. About partitions
- */
-
-/* MS/DOS partition */
-
-struct partition {
- unsigned char bootable; /* 0 or 0x80 */
- chs begin_chs;
- unsigned char sys_type;
- chs end_chs;
- unsigned int start_sect; /* starting sector counting from 0 */
- unsigned int nr_sects; /* nr of sectors in partition */
-};
-
-/* Unfortunately, partitions are not aligned, and non-Intel machines
- are unhappy with non-aligned integers. So, we need a copy by hand. */
-static int copy_to_int(unsigned char *cp)
-{
- unsigned int m;
-
- m = *cp++;
- m += (*cp++ << 8);
- m += (*cp++ << 16);
- m += (*cp++ << 24);
- return m;
-}
-
-static void copy_from_int(int m, char *cp)
-{
- *cp++ = (m & 0xff);
- m >>= 8;
- *cp++ = (m & 0xff);
- m >>= 8;
- *cp++ = (m & 0xff);
- m >>= 8;
- *cp++ = (m & 0xff);
-}
-
-static void copy_to_part(char *cp, struct partition *p)
-{
- p->bootable = *cp++;
- p->begin_chs.h = *cp++;
- p->begin_chs.s = *cp++;
- p->begin_chs.c = *cp++;
- p->sys_type = *cp++;
- p->end_chs.h = *cp++;
- p->end_chs.s = *cp++;
- p->end_chs.c = *cp++;
- p->start_sect = copy_to_int(cp);
- p->nr_sects = copy_to_int(cp + 4);
-}
-
-static void copy_from_part(struct partition *p, char *cp)
-{
- *cp++ = p->bootable;
- *cp++ = p->begin_chs.h;
- *cp++ = p->begin_chs.s;
- *cp++ = p->begin_chs.c;
- *cp++ = p->sys_type;
- *cp++ = p->end_chs.h;
- *cp++ = p->end_chs.s;
- *cp++ = p->end_chs.c;
- copy_from_int(p->start_sect, cp);
- copy_from_int(p->nr_sects, cp + 4);
-}
-
-/* Roughly speaking, Linux doesn't use any of the above fields except
- for partition type, start sector and number of sectors. (However,
- see also linux/drivers/scsi/fdomain.c.)
- The only way partition type is used (in the kernel) is the comparison
- for equality with EXTENDED_PARTITION (and these Disk Manager types). */
-
-struct part_desc {
- unsigned long start;
- unsigned long size;
- unsigned long sector, offset; /* disk location of this info */
- struct partition p;
- struct part_desc *ep; /* extended partition containing this one */
- int ptype;
-#define DOS_TYPE 0
-#define BSD_TYPE 1
-} zero_part_desc;
-
-struct part_desc *outer_extended_partition(struct part_desc *p)
-{
- while (p->ep)
- p = p->ep;
- return p;
-}
-
-static int is_parent(struct part_desc *pp, struct part_desc *p)
-{
- while (p) {
- if (pp == p)
- return 1;
- p = p->ep;
- }
- return 0;
-}
-
-struct disk_desc {
- struct part_desc partitions[128];
- int partno;
-} oldp, newp;
-
-/* determine where on the disk this information goes */
-static void add_sector_and_offset(struct disk_desc *z)
-{
- int pno;
- struct part_desc *p;
-
- for (pno = 0; pno < z->partno; pno++) {
- p = &(z->partitions[pno]);
- p->offset = 0x1be + (pno % 4) * sizeof(struct partition);
-
- p->sector = (p->ep ? p->ep->start : 0);
- }
-}
-
-/* tell the kernel to reread the partition tables */
-static int reread_ioctl(int fd)
-{
- if (ioctl(fd, BLKRRPART)) {
- perror("BLKRRPART");
- return -1;
- }
- return 0;
-}
-
-static int is_blockdev(int fd)
-{
- struct stat statbuf;
-
- return (fstat(fd, &statbuf) == 0 && S_ISBLK(statbuf.st_mode));
-}
-
-/* reread after writing */
-static void reread_disk_partition(char *dev, int fd)
-{
- printf("Re-reading the partition table ...\n");
- fflush(stdout);
- sync();
- sleep(3); /* superfluous since 1.3.20 */
-
- if (reread_ioctl(fd) && is_blockdev(fd))
- printf("The command to re-read the partition table failed\n"
- "Reboot your system now, before using mkfs\n");
-
- if (close(fd)) {
- perror(dev);
- printf("Error closing %s\n", dev);
- }
- printf("\n");
-}
-
-/* find Linux name of this partition, assuming that it will have a name */
-static int index_to_linux(int pno, struct disk_desc *z)
-{
- int i, ct = 1;
- struct part_desc *p = &(z->partitions[0]);
-
- for (i = 0; i < pno; i++, p++)
- if (i < 4 || (p->size > 0 && !is_extended(p->p.sys_type)))
- ct++;
- return ct;
-}
-
-static int linux_to_index(int lpno, struct disk_desc *z)
-{
- int i, ct = 0;
- struct part_desc *p = &(z->partitions[0]);
-
- for (i = 0; i < z->partno && ct < lpno; i++, p++)
- if ((i < 4 || (p->size > 0 && !is_extended(p->p.sys_type)))
- && ++ct == lpno)
- return i;
- return -1;
-}
-
-static int asc_to_index(char *pnam, struct disk_desc *z)
-{
- int pnum, pno;
-
- if (*pnam == '#') {
- pno = atoi(pnam + 1);
- } else {
- pnum = atoi(pnam);
- pno = linux_to_index(pnum, z);
- }
- if (!(pno >= 0 && pno < z->partno))
- fatalError("%s: no such partition\n", pnam);
- return pno;
-}
-
-/*
- * List partitions - in terms of sectors, blocks or cylinders
- */
-#define F_SECTOR 1
-#define F_BLOCK 2
-#define F_CYLINDER 3
-#define F_MEGABYTE 4
-
-static int default_format = F_MEGABYTE;
-static int specified_format = 0;
-static int show_extended = 0;
-static int one_only = 0;
-static int one_only_pno;
-static int increment = 0;
-
-static void set_format(char c)
-{
- switch (c) {
- default:
- printf("unrecognized format - using sectors\n");
- case 'S':
- specified_format = F_SECTOR;
- break;
- case 'B':
- specified_format = F_BLOCK;
- break;
- case 'C':
- specified_format = F_CYLINDER;
- break;
- case 'M':
- specified_format = F_MEGABYTE;
- break;
- }
-}
-
-static unsigned long unitsize(int format)
-{
- default_format = (B.cylindersize ? F_CYLINDER : F_MEGABYTE);
- if (!format && !(format = specified_format))
- format = default_format;
-
- switch (format) {
- default:
- case F_CYLINDER:
- if (B.cylindersize)
- return B.cylindersize;
- case F_SECTOR:
- return 1;
- case F_BLOCK:
- return 2;
- case F_MEGABYTE:
- return 2048;
- }
-}
-
-static unsigned long get_disksize(int format)
-{
- unsigned long cs = B.cylinders;
-
- if (cs && leave_last)
- cs--;
- return (cs * B.cylindersize) / unitsize(format);
-}
-
-static void out_partition_header(char *dev, int format, struct geometry G)
-{
- if (dump) {
- printf("# partition table of %s\n", dev);
- printf("unit: sectors\n\n");
- return;
- }
-
- default_format = (G.cylindersize ? F_CYLINDER : F_MEGABYTE);
- if (!format && !(format = specified_format))
- format = default_format;
-
- switch (format) {
- default:
- printf("unimplemented format - using %s\n",
- G.cylindersize ? "cylinders" : "sectors");
- case F_CYLINDER:
- if (G.cylindersize) {
- printf("Units = cylinders of %lu bytes, blocks of 1024 bytes"
- ", counting from %d\n\n",
- G.cylindersize << 9, increment);
- printf
- (" Device Boot Start End #cyls #blocks Id System\n");
- break;
- }
- /* fall through */
- case F_SECTOR:
- printf("Units = sectors of 512 bytes, counting from %d\n\n",
- increment);
- printf
- (" Device Boot Start End #sectors Id System\n");
- break;
- case F_BLOCK:
- printf("Units = blocks of 1024 bytes, counting from %d\n\n",
- increment);
- printf
- (" Device Boot Start End #blocks Id System\n");
- break;
- case F_MEGABYTE:
- printf("Units = megabytes of 1048576 bytes, blocks of 1024 bytes"
- ", counting from %d\n\n", increment);
- printf
- (" Device Boot Start End MB #blocks Id System\n");
- break;
- }
-}
-
-static void
-out_rounddown(int width, unsigned long n, unsigned long unit, int inc)
-{
- printf("%*lu", width, inc + n / unit);
- if (unit != 1)
- putchar((n % unit) ? '+' : ' ');
- putchar(' ');
-}
-
-static void
-out_roundup(int width, unsigned long n, unsigned long unit, int inc)
-{
- if (n == (unsigned long) (-1))
- printf("%*s", width, "-");
- else
- printf("%*lu", width, inc + n / unit);
- if (unit != 1)
- putchar(((n + 1) % unit) ? '-' : ' ');
- putchar(' ');
-}
-
-static void
-out_roundup_size(int width, unsigned long n, unsigned long unit)
-{
- printf("%*lu", width, (n + unit - 1) / unit);
- if (unit != 1)
- putchar((n % unit) ? '-' : ' ');
- putchar(' ');
-}
-
-static int get_fdisk_geometry(struct part_desc *p)
-{
- chs b = p->p.end_chs;
- longchs bb = chs_to_longchs(b);
-
- F.heads = bb.h + 1;
- F.sectors = bb.s;
- F.cylindersize = F.heads * F.sectors;
- return (F.sectors != B.sectors || F.heads != B.heads);
-}
-
-static void
-out_partition(char *dev, int format, struct part_desc *p,
- struct disk_desc *z, struct geometry G)
-{
- unsigned long start, end, size;
- int pno, lpno;
-
- if (!format && !(format = specified_format))
- format = default_format;
-
- pno = p - &(z->partitions[0]); /* our index */
- lpno = index_to_linux(pno, z); /* name of next one that has a name */
- if (pno == linux_to_index(lpno, z)) /* was that us? */
- printf("%8s%-2u", dev, lpno); /* yes */
- else if (show_extended)
- printf(" - ");
- else
- return;
- putchar(dump ? ':' : ' ');
-
- start = p->start;
- end = p->start + p->size - 1;
- size = p->size;
-
- if (dump) {
- printf(" start=%9lu", start);
- printf(", size=%8lu", size);
- if (p->ptype == DOS_TYPE) {
- printf(", Id=%2x", p->p.sys_type);
- if (p->p.bootable == 0x80)
- printf(", bootable");
- }
- printf("\n");
- return;
- }
-
- if (p->ptype != DOS_TYPE || p->p.bootable == 0)
- printf(" ");
- else if (p->p.bootable == 0x80)
- printf(" * ");
- else
- printf(" ? "); /* garbage */
-
- switch (format) {
- case F_CYLINDER:
- if (G.cylindersize) {
- out_rounddown(6, start, G.cylindersize, increment);
- out_roundup(6, end, G.cylindersize, increment);
- out_roundup_size(6, size, G.cylindersize);
- out_rounddown(8, size, 2, 0);
- break;
- }
- /* fall through */
- default:
- case F_SECTOR:
- out_rounddown(9, start, 1, increment);
- out_roundup(9, end, 1, increment);
- out_rounddown(9, size, 1, 0);
- break;
- case F_BLOCK:
-#if 0
- printf("%8lu,%3lu ",
- p->sector / 2, ((p->sector & 1) ? 512 : 0) + p->offset);
-#endif
- out_rounddown(8, start, 2, increment);
- out_roundup(8, end, 2, increment);
- out_rounddown(8, size, 2, 0);
- break;
- case F_MEGABYTE:
- out_rounddown(5, start, 2048, increment);
- out_roundup(5, end, 2048, increment);
- out_roundup_size(5, size, 2048);
- out_rounddown(8, size, 2, 0);
- break;
- }
- if (p->ptype == DOS_TYPE) {
- printf(" %2x %s\n", p->p.sys_type, sysname(p->p.sys_type));
- } else {
- printf("\n");
- }
-
- /* Is chs as we expect? */
- if (!quiet && p->ptype == DOS_TYPE) {
- chs a, b;
- longchs aa, bb;
-
- a = (size ? ulong_to_chs(start, G) : zero_chs);
- b = p->p.begin_chs;
- aa = chs_to_longchs(a);
- bb = chs_to_longchs(b);
- if (a.s && !is_equal_chs(a, b))
- printf
- ("\t\tstart: (c,h,s) expected (%ld,%ld,%ld) found (%ld,%ld,%ld)\n",
- aa.c, aa.h, aa.s, bb.c, bb.h, bb.s);
- a = (size ? ulong_to_chs(end, G) : zero_chs);
- b = p->p.end_chs;
- aa = chs_to_longchs(a);
- bb = chs_to_longchs(b);
- if (a.s && !is_equal_chs(a, b))
- printf
- ("\t\tend: (c,h,s) expected (%ld,%ld,%ld) found (%ld,%ld,%ld)\n",
- aa.c, aa.h, aa.s, bb.c, bb.h, bb.s);
- if (G.cylinders && G.cylinders < 1024 && bb.c > G.cylinders)
- printf
- ("partition ends on cylinder %ld, beyond the end of the disk\n",
- bb.c);
- }
-}
-
-static void out_partitions(char *dev, struct disk_desc *z)
-{
- struct part_desc *p;
- int pno, format = 0;
-
- if (z->partno == 0)
- printf("No partitions found\n");
- else {
- for (pno = 0; pno < z->partno; pno++) {
- p = &(z->partitions[pno]);
- if (p->size != 0 && p->p.sys_type != 0) {
- if (get_fdisk_geometry(p))
- printf
- ("Warning: The first partition looks like it was made\n"
- " for C/H/S=*/%ld/%ld (instead of %ld/%ld/%ld).\n"
- "For this listing I'll assume that geometry.\n",
- F.heads, F.sectors, B.cylinders, B.heads,
- B.sectors);
- break;
- }
- }
- out_partition_header(dev, format, F);
- for (pno = 0; pno < z->partno; pno++) {
- out_partition(dev, format, &(z->partitions[pno]), z, F);
- if (show_extended && pno % 4 == 3)
- printf("\n");
- }
- }
-}
-
-static int disj(struct part_desc *p, struct part_desc *q)
-{
- return ((p->start + p->size <= q->start)
- || (is_extended(p->p.sys_type)
- && q->start + q->size <= p->start + p->size));
-}
-
-static char *pnumber(struct part_desc *p, struct disk_desc *z)
-{
- static char buf[20];
- int this, next;
- struct part_desc *p0 = &(z->partitions[0]);
-
- this = index_to_linux(p - p0, z);
- next = index_to_linux(p - p0 + 1, z);
-
- if (next > this)
- sprintf(buf, "%d", this);
- else
- sprintf(buf, "[%d]", this);
- return buf;
-}
-
-static int partitions_ok(struct disk_desc *z)
-{
- struct part_desc *partitions = &(z->partitions[0]), *p, *q;
- int partno = z->partno;
-
-#define PNO(p) pnumber(p, z)
-
- /* Have at least 4 partitions been defined? */
- if (partno < 4) {
- if (!partno)
- fatalError("no partition table present.\n");
- else
- fatalError("strange, only %d partitions defined.\n", partno);
- return 0;
- }
-
- /* Are the partitions of size 0 marked empty?
- And do they have start = 0? And bootable = 0? */
- for (p = partitions; p - partitions < partno; p++)
- if (p->size == 0) {
- if (p->p.sys_type != EMPTY_PARTITION)
- warn
- ("Warning: partition %s has size 0 but is not marked Empty\n",
- PNO(p));
- else if (p->p.bootable != 0)
- warn("Warning: partition %s has size 0 and is bootable\n",
- PNO(p));
- else if (p->p.start_sect != 0)
- warn
- ("Warning: partition %s has size 0 and nonzero start\n",
- PNO(p));
- /* all this is probably harmless, no error return */
- }
-
- /* Are the logical partitions contained in their extended partitions? */
- for (p = partitions + 4; p < partitions + partno; p++)
- if (p->ptype == DOS_TYPE)
- if (p->size && !is_extended(p->p.sys_type)) {
- q = p->ep;
- if (p->start < q->start
- || p->start + p->size > q->start + q->size) {
- warn("Warning: partition %s ", PNO(p));
- warn("is not contained in partition %s\n", PNO(q));
- return 0;
- }
- }
-
- /* Are the data partitions mutually disjoint? */
- for (p = partitions; p < partitions + partno; p++)
- if (p->size && !is_extended(p->p.sys_type))
- for (q = p + 1; q < partitions + partno; q++)
- if (q->size && !is_extended(q->p.sys_type))
- if (!((p->start > q->start) ? disj(q, p) : disj(p, q))) {
- warn("Warning: partitions %s ", PNO(p));
- warn("and %s overlap\n", PNO(q));
- return 0;
- }
-
- /* Are the data partitions and the extended partition
- table sectors disjoint? */
- for (p = partitions; p < partitions + partno; p++)
- if (p->size && !is_extended(p->p.sys_type))
- for (q = partitions; q < partitions + partno; q++)
- if (is_extended(q->p.sys_type))
- if (p->start <= q->start
- && p->start + p->size > q->start) {
- warn("Warning: partition %s contains part of ",
- PNO(p));
- warn("the partition table (sector %lu),\n",
- q->start);
- warn("and will destroy it when filled\n");
- return 0;
- }
-
- /* Do they start past zero and end before end-of-disk? */
- {
- unsigned long ds = get_disksize(F_SECTOR);
-
- for (p = partitions; p < partitions + partno; p++)
- if (p->size) {
- if (p->start == 0) {
- warn("Warning: partition %s starts at sector 0\n",
- PNO(p));
- return 0;
- }
- if (p->size && p->start + p->size > ds) {
- warn
- ("Warning: partition %s extends past end of disk\n",
- PNO(p));
- return 0;
- }
- }
- }
-
- /* At most one chain of DOS extended partitions ? */
- /* It seems that the OS/2 fdisk has the additional requirement
- that the extended partition must be the fourth one */
- {
- int ect = 0;
-
- for (p = partitions; p < partitions + 4; p++)
- if (p->p.sys_type == EXTENDED_PARTITION)
- ect++;
- if (ect > 1 && !Linux) {
- warn
- ("Among the primary partitions, at most one can be extended\n");
- warn(" (although this is not a problem under Linux)\n");
- return 0;
- }
- }
-
- /*
- * Do all partitions start at a cylinder boundary ?
- * (this is not required for Linux)
- * The first partition starts after MBR.
- * Logical partitions start slightly after the containing extended partn.
- */
- if (B.cylindersize) {
- for (p = partitions; p < partitions + partno; p++)
- if (p->size) {
- if (p->start % B.cylindersize != 0
- && (!p->ep
- || p->start / B.cylindersize !=
- p->ep->start / B.cylindersize)
- && (p->p.start_sect >= B.cylindersize)) {
- warn("Warning: partition %s does not start "
- "at a cylinder boundary\n", PNO(p));
- if (!Linux)
- return 0;
- }
- if ((p->start + p->size) % B.cylindersize) {
- warn("Warning: partition %s does not end "
- "at a cylinder boundary\n", PNO(p));
- if (!Linux)
- return 0;
- }
- }
- }
-
- /* Usually, one can boot only from primary partitions. */
- /* In fact, from a unique one only. */
- /* do not warn about bootable extended partitions -
- often LILO is there */
- {
- int pno = -1;
-
- for (p = partitions; p < partitions + partno; p++)
- if (p->p.bootable) {
- if (pno == -1)
- pno = p - partitions;
- else if (p - partitions < 4) {
- warn
- ("Warning: more than one primary partition is marked "
- "bootable (active)\n"
- "This does not matter for LILO, but the DOS MBR will "
- "not boot this disk.\n");
- break;
- }
- if (p - partitions >= 4) {
- warn
- ("Warning: usually one can boot from primary partitions "
- "only\nLILO disregards the `bootable' flag.\n");
- break;
- }
- }
- if (pno == -1 || pno >= 4)
- warn
- ("Warning: no primary partition is marked bootable (active)\n"
- "This does not matter for LILO, but the DOS MBR will "
- "not boot this disk.\n");
- }
-
- /* Is chs as we expect? */
- for (p = partitions; p < partitions + partno; p++)
- if (p->ptype == DOS_TYPE) {
- chs a, b;
- longchs aa, bb;
-
- a = p->size ? ulong_to_chs(p->start, B) : zero_chs;
- b = p->p.begin_chs;
- aa = chs_to_longchs(a);
- bb = chs_to_longchs(b);
- if (!chs_ok(b, PNO(p), "start"))
- return 0;
- if (a.s && !is_equal_chs(a, b))
- warn
- ("partition %s: start: (c,h,s) expected (%ld,%ld,%ld) found (%ld,%ld,%ld)\n",
- PNO(p), aa.c, aa.h, aa.s, bb.c, bb.h, bb.s);
- a =
- p->size ? ulong_to_chs(p->start + p->size - 1,
- B) : zero_chs;
- b = p->p.end_chs;
- aa = chs_to_longchs(a);
- bb = chs_to_longchs(b);
- if (!chs_ok(b, PNO(p), "end"))
- return 0;
- if (a.s && !is_equal_chs(a, b))
- warn
- ("partition %s: end: (c,h,s) expected (%ld,%ld,%ld) found (%ld,%ld,%ld)\n",
- PNO(p), aa.c, aa.h, aa.s, bb.c, bb.h, bb.s);
- if (B.cylinders && B.cylinders < 1024 && bb.c > B.cylinders)
- warn
- ("partition %s ends on cylinder %ld, beyond the end of the disk\n",
- PNO(p), bb.c);
- }
-
- return 1;
-
-#undef PNO
-}
-
-static void
-extended_partition(char *dev, int fd, struct part_desc *ep,
- struct disk_desc *z)
-{
- char *cp;
- struct sector *s;
- unsigned long start, here, next;
- int i, moretodo = 1;
- struct partition p;
- struct part_desc *partitions = &(z->partitions[0]);
- int pno = z->partno;
-
- here = start = ep->start;
-
- while (moretodo) {
- moretodo = 0;
-
- if (!(s = get_sector(dev, fd, here)))
- break;
-
- if (!msdos_signature(s))
- break;
-
- cp = s->data + 0x1be;
-
- if (pno + 4 >= SIZE(z->partitions)) {
- printf("too many partitions - ignoring those past nr (%d)\n",
- pno - 1);
- break;
- }
-
- next = 0;
-
- for (i = 0; i < 4; i++, cp += sizeof(struct partition)) {
- partitions[pno].sector = here;
- partitions[pno].offset = cp - s->data;
- partitions[pno].ep = ep;
- copy_to_part(cp, &p);
- if (is_extended(p.sys_type)) {
- partitions[pno].start = start + p.start_sect;
- if (next)
- printf("tree of partitions?\n");
- else
- next = partitions[pno].start; /* follow `upper' branch */
- moretodo = 1;
- } else {
- partitions[pno].start = here + p.start_sect;
- }
- partitions[pno].size = p.nr_sects;
- partitions[pno].ptype = DOS_TYPE;
- partitions[pno].p = p;
- pno++;
- }
- here = next;
- }
-
- z->partno = pno;
-}
-
-#define BSD_DISKMAGIC (0x82564557UL)
-#define BSD_MAXPARTITIONS 8
-#define BSD_FS_UNUSED 0
-typedef unsigned char u8;
-typedef unsigned short u16;
-typedef unsigned int u32;
-struct bsd_disklabel {
- u32 d_magic;
- char d_junk1[4];
- char d_typename[16];
- char d_packname[16];
- char d_junk2[92];
- u32 d_magic2;
- char d_junk3[2];
- u16 d_npartitions; /* number of partitions in following */
- char d_junk4[8];
- struct bsd_partition { /* the partition table */
- u32 p_size; /* number of sectors in partition */
- u32 p_offset; /* starting sector */
- u32 p_fsize; /* filesystem basic fragment size */
- u8 p_fstype; /* filesystem type, see below */
- u8 p_frag; /* filesystem fragments per block */
- u16 p_cpg; /* filesystem cylinders per group */
- } d_partitions[BSD_MAXPARTITIONS]; /* actually may be more */
-};
-
-static void
-bsd_partition(char *dev, int fd, struct part_desc *ep, struct disk_desc *z)
-{
- struct bsd_disklabel *l;
- struct bsd_partition *bp, *bp0;
- unsigned long start = ep->start;
- struct sector *s;
- struct part_desc *partitions = &(z->partitions[0]);
- int pno = z->partno;
-
- if (!(s = get_sector(dev, fd, start + 1)))
- return;
- l = (struct bsd_disklabel *) (s->data);
- if (l->d_magic != BSD_DISKMAGIC)
- return;
-
- bp = bp0 = &l->d_partitions[0];
- while (bp - bp0 <= BSD_MAXPARTITIONS) {
- if (pno + 1 >= SIZE(z->partitions)) {
- printf("too many partitions - ignoring those "
- "past nr (%d)\n", pno - 1);
- break;
- }
- if (bp->p_fstype != BSD_FS_UNUSED) {
- partitions[pno].start = bp->p_offset;
- partitions[pno].size = bp->p_size;
- partitions[pno].sector = start + 1;
- partitions[pno].offset = (char *) bp - (char *) bp0;
- partitions[pno].ep = 0;
- partitions[pno].ptype = BSD_TYPE;
- pno++;
- }
- bp++;
- }
- z->partno = pno;
-}
-
-static int
-msdos_partition(char *dev, int fd, unsigned long start,
- struct disk_desc *z)
-{
- int i;
- char *cp;
- struct partition pt;
- struct sector *s;
- struct part_desc *partitions = &(z->partitions[0]);
- int pno = z->partno;
-
- if (!(s = get_sector(dev, fd, start)))
- return 0;
-
- if (!msdos_signature(s))
- return 0;
-
- cp = s->data + 0x1be;
- copy_to_part(cp, &pt);
-
- /* If I am not mistaken, recent kernels will hide this from us,
- so we will never actually see traces of a Disk Manager */
- if (pt.sys_type == DM6_PARTITION
- || pt.sys_type == EZD_PARTITION
- || pt.sys_type == DM6_AUX1PARTITION
- || pt.sys_type == DM6_AUX3PARTITION) {
- printf("detected Disk Manager - unable to handle that\n");
- return 0;
- }
- {
- unsigned int sig = *(unsigned short *) (s->data + 2);
-
- if (sig <= 0x1ae
- && *(unsigned short *) (s->data + sig) == 0x55aa
- && (1 & *(unsigned char *) (s->data + sig + 2))) {
- printf("DM6 signature found - giving up\n");
- return 0;
- }
- }
-
- for (pno = 0; pno < 4; pno++, cp += sizeof(struct partition)) {
- partitions[pno].sector = start;
- partitions[pno].offset = cp - s->data;
- copy_to_part(cp, &pt);
- partitions[pno].start = start + pt.start_sect;
- partitions[pno].size = pt.nr_sects;
- partitions[pno].ep = 0;
- partitions[pno].p = pt;
- }
-
- z->partno = pno;
-
- for (i = 0; i < 4; i++) {
- if (is_extended(partitions[i].p.sys_type)) {
- if (!partitions[i].size) {
- printf("strange..., an extended partition of size 0?\n");
- continue;
- }
- extended_partition(dev, fd, &partitions[i], z);
- }
- if (is_bsd(partitions[i].p.sys_type)) {
- if (!partitions[i].size) {
- printf("strange..., a BSD partition of size 0?\n");
- continue;
- }
- bsd_partition(dev, fd, &partitions[i], z);
- }
- }
- return 1;
-}
-
-static int
-osf_partition(char *dev, int fd, unsigned long start, struct disk_desc *z)
-{
- return 0;
-}
-
-static int
-sun_partition(char *dev, int fd, unsigned long start, struct disk_desc *z)
-{
- return 0;
-}
-
-static int
-amiga_partition(char *dev, int fd, unsigned long start,
- struct disk_desc *z)
-{
- return 0;
-}
-
-static void get_partitions(char *dev, int fd, struct disk_desc *z)
-{
- z->partno = 0;
-
- if (!msdos_partition(dev, fd, 0, z)
- && !osf_partition(dev, fd, 0, z)
- && !sun_partition(dev, fd, 0, z)
- && !amiga_partition(dev, fd, 0, z)) {
- printf(" %s: unrecognized partition\n", dev);
- return;
- }
-}
-
-static int write_partitions(char *dev, int fd, struct disk_desc *z)
-{
- struct sector *s;
- struct part_desc *partitions = &(z->partitions[0]), *p;
- int pno = z->partno;
-
- if (no_write) {
- printf("-n flag was given: Nothing changed\n");
- exit(0);
- }
-
- for (p = partitions; p < partitions + pno; p++) {
- s = get_sector(dev, fd, p->sector);
- if (!s)
- return 0;
- s->to_be_written = 1;
- copy_from_part(&(p->p), s->data + p->offset);
- *(unsigned short *) (&(s->data[0x1fe])) = 0xaa55;
- }
- if (save_sector_file) {
- if (!save_sectors(dev, fd)) {
- fatalError("Failed saving the old sectors - aborting\n");
- return 0;
- }
- }
- if (!write_sectors(dev, fd)) {
- errorMsg("Failed writing the partition on %s\n", dev);
- return 0;
- }
- return 1;
-}
-
-/*
- * F. The standard input
- */
-
-/*
- * Input format:
- * <start> <size> <type> <bootable> <c,h,s> <c,h,s>
- * Fields are separated by whitespace or comma or semicolon possibly
- * followed by whitespace; initial and trailing whitespace is ignored.
- * Numbers can be octal, decimal or hexadecimal, decimal is default
- * The <c,h,s> parts can (and probably should) be omitted.
- * Bootable is specified as [*|-], with as default not-bootable.
- * Type is given in hex, without the 0x prefix, or is [E|S|L|X], where
- * L (LINUX_NATIVE (83)) is the default, S is LINUX_SWAP (82), and E
- * is EXTENDED_PARTITION (5), X is LINUX_EXTENDED (85).
- * The default value of start is the first nonassigned sector/cylinder/...
- * The default value of size is as much as possible (until next
- * partition or end-of-disk).
- * .: end of chain of extended partitions.
- *
- * On interactive input an empty line means: all defaults.
- * Otherwise empty lines are ignored.
- */
-
-static int eof, eob;
-
-struct dumpfld {
- int fldno;
- char *fldname;
- int is_bool;
-} dumpflds[] = {
- {
- 0, "start", 0}, {
- 1, "size", 0}, {
- 2, "Id", 0}, {
- 3, "bootable", 1}, {
- 4, "bh", 0}, {
- 5, "bs", 0}, {
- 6, "bc", 0}, {
- 7, "eh", 0}, {
- 8, "es", 0}, {
- 9, "ec", 0}
-};
-
-/*
- * Read a line, split it into fields
- *
- * (some primitive handwork, but a more elaborate parser seems
- * unnecessary)
- */
-#define RD_EOF (-1)
-#define RD_CMD (-2)
-
-static int
-read_stdin(unsigned char **fields, unsigned char *line, int fieldssize,
- int linesize)
-{
- unsigned char *lp, *ip;
- int c, fno;
-
- /* boolean true and empty string at start */
- line[0] = '*';
- line[1] = 0;
- for (fno = 0; fno < fieldssize; fno++)
- fields[fno] = line + 1;
- fno = 0;
-
- /* read a line from stdin */
- lp = fgets(line + 2, linesize, stdin);
- if (lp == NULL) {
- eof = 1;
- return RD_EOF;
- }
- if (!(lp = index(lp, '\n')))
- fatalError("long or incomplete input line - quitting\n");
- *lp = 0;
-
- /* remove comments, if any */
- if ((lp = index(line + 2, '#')) != 0)
- *lp = 0;
-
- /* recognize a few commands - to be expanded */
- if (!strcmp(line + 2, "unit: sectors")) {
- specified_format = F_SECTOR;
- return RD_CMD;
- }
-
- /* dump style? - then bad input is fatal */
- if ((ip = index(line + 2, ':')) != 0) {
- struct dumpfld *d;
-
- nxtfld:
- ip++;
- while (isspace(*ip))
- ip++;
- if (*ip == 0)
- return fno;
- for (d = dumpflds; d - dumpflds < SIZE(dumpflds); d++) {
- if (!strncmp(ip, d->fldname, strlen(d->fldname))) {
- ip += strlen(d->fldname);
- while (isspace(*ip))
- ip++;
- if (d->is_bool)
- fields[d->fldno] = line;
- else if (*ip == '=') {
- while (isspace(*++ip));
- fields[d->fldno] = ip;
- while (isalnum(*ip)) /* 0x07FF */
- ip++;
- } else
- fatalError("input error: `=' expected after %s field\n",
- d->fldname);
- if (fno <= d->fldno)
- fno = d->fldno + 1;
- if (*ip == 0)
- return fno;
- if (*ip != ',' && *ip != ';')
- fatalError
- ("input error: unexpected character %c after %s field\n",
- *ip, d->fldname);
- *ip = 0;
- goto nxtfld;
- }
- }
- fatalError("unrecognized input: %s\n", ip);
- }
-
- /* split line into fields */
- lp = ip = line + 2;
- fields[fno++] = lp;
- while ((c = *ip++) != 0) {
- if (!lp[-1] && (c == '\t' || c == ' '));
- else if (c == '\t' || c == ' ' || c == ',' || c == ';') {
- *lp++ = 0;
- if (fno < fieldssize)
- fields[fno++] = lp;
- continue;
- } else
- *lp++ = c;
- }
-
- if (lp == fields[fno - 1])
- fno--;
- return fno;
-}
-
-/* read a number, use default if absent */
-static int get_ul(char *u, unsigned long *up, unsigned long def, int base)
-{
- char *nu;
-
- if (*u) {
- errno = 0;
- *up = strtoul(u, &nu, base);
- if (errno == ERANGE) {
- printf("number too big\n");
- return -1;
- }
- if (*nu) {
- printf("trailing junk after number\n");
- return -1;
- }
- } else
- *up = def;
- return 0;
-}
-
-/* There are two common ways to structure extended partitions:
- as nested boxes, and as a chain. Sometimes the partitions
- must be given in order. Sometimes all logical partitions
- must lie inside the outermost extended partition.
-NESTED: every partition is contained in the surrounding partitions
- and is disjoint from all others.
-CHAINED: every data partition is contained in the surrounding partitions
- and disjoint from all others, but extended partitions may lie outside
- (insofar as allowed by all_logicals_inside_outermost_extended).
-ONESECTOR: all data partitions are mutually disjoint; extended partitions
- each use one sector only (except perhaps for the outermost one).
-*/
-static int partitions_in_order = 0;
-static int all_logicals_inside_outermost_extended = 1;
-static enum { NESTED, CHAINED, ONESECTOR } boxes = NESTED;
-
-/* find the default value for <start> - assuming entire units */
-static unsigned long
-first_free(int pno, int is_extended, struct part_desc *ep, int format,
- unsigned long mid, struct disk_desc *z)
-{
- unsigned long ff, fff;
- unsigned long unit = unitsize(format);
- struct part_desc *partitions = &(z->partitions[0]), *pp = 0;
-
- /* if containing ep undefined, look at its container */
- if (ep && ep->p.sys_type == EMPTY_PARTITION)
- ep = ep->ep;
-
- if (ep) {
- if (boxes == NESTED || (boxes == CHAINED && !is_extended))
- pp = ep;
- else if (all_logicals_inside_outermost_extended)
- pp = outer_extended_partition(ep);
- }
-#if 0
- ff = pp ? (pp->start + unit - 1) / unit : 0;
-#else
- /* rounding up wastes almost an entire cylinder - round down
- and leave it to compute_start_sect() to fix the difference */
- ff = pp ? pp->start / unit : 0;
-#endif
- /* MBR and 1st sector of an extended partition are never free */
- if (unit == 1)
- ff++;
-
- again:
- for (pp = partitions; pp < partitions + pno; pp++) {
- if (!is_parent(pp, ep) && pp->size > 0) {
- if ((partitions_in_order || pp->start / unit <= ff
- || (mid && pp->start / unit <= mid))
- && (fff = (pp->start + pp->size + unit - 1) / unit) > ff) {
- ff = fff;
- goto again;
- }
- }
- }
-
- return ff;
-}
-
-/* find the default value for <size> - assuming entire units */
-static unsigned long
-max_length(int pno, int is_extended, struct part_desc *ep, int format,
- unsigned long start, struct disk_desc *z)
-{
- unsigned long fu;
- unsigned long unit = unitsize(format);
- struct part_desc *partitions = &(z->partitions[0]), *pp = 0;
-
- /* if containing ep undefined, look at its container */
- if (ep && ep->p.sys_type == EMPTY_PARTITION)
- ep = ep->ep;
-
- if (ep) {
- if (boxes == NESTED || (boxes == CHAINED && !is_extended))
- pp = ep;
- else if (all_logicals_inside_outermost_extended)
- pp = outer_extended_partition(ep);
- }
- fu = pp ? (pp->start + pp->size) / unit : get_disksize(format);
-
- for (pp = partitions; pp < partitions + pno; pp++)
- if (!is_parent(pp, ep) && pp->size > 0
- && pp->start / unit >= start && pp->start / unit < fu)
- fu = pp->start / unit;
-
- return (fu > start) ? fu - start : 0;
-}
-
-/* compute starting sector of a partition inside an extended one */
-/* ep is 0 or points to surrounding extended partition */
-static int compute_start_sect(struct part_desc *p, struct part_desc *ep)
-{
- unsigned long base;
- int inc = (DOS && B.sectors) ? B.sectors : 1;
- int delta;
-
- if (ep && p->start + p->size >= ep->start + 1)
- delta = p->start - ep->start - inc;
- else if (p->start == 0 && p->size > 0)
- delta = -inc;
- else
- delta = 0;
- if (delta < 0) {
- p->start -= delta;
- p->size += delta;
- if (is_extended(p->p.sys_type) && boxes == ONESECTOR)
- p->size = inc;
- else if ((int) (p->size) <= 0) {
- warn("no room for partition descriptor\n");
- return 0;
- }
- }
- base = (!ep ? 0
- : (is_extended(p->p.sys_type) ?
- outer_extended_partition(ep) : ep)->start);
- p->ep = ep;
- if (p->p.sys_type == EMPTY_PARTITION && p->size == 0) {
- p->p.start_sect = 0;
- p->p.begin_chs = zero_chs;
- p->p.end_chs = zero_chs;
- } else {
- p->p.start_sect = p->start - base;
- p->p.begin_chs = ulong_to_chs(p->start, B);
- p->p.end_chs = ulong_to_chs(p->start + p->size - 1, B);
- }
- p->p.nr_sects = p->size;
- return 1;
-}
-
-/* build the extended partition surrounding a given logical partition */
-static int
-build_surrounding_extended(struct part_desc *p, struct part_desc *ep,
- struct disk_desc *z)
-{
- int inc = (DOS && B.sectors) ? B.sectors : 1;
- int format = F_SECTOR;
- struct part_desc *p0 = &(z->partitions[0]), *eep = ep->ep;
-
- if (boxes == NESTED) {
- ep->start = first_free(ep - p0, 1, eep, format, p->start, z);
- ep->size = max_length(ep - p0, 1, eep, format, ep->start, z);
- if (ep->start > p->start
- || ep->start + ep->size < p->start + p->size) {
- warn("cannot build surrounding extended partition\n");
- return 0;
- }
- } else {
- ep->start = p->start;
- if (boxes == CHAINED)
- ep->size = p->size;
- else
- ep->size = inc;
- }
-
- ep->p.nr_sects = ep->size;
- ep->p.bootable = 0;
- ep->p.sys_type = EXTENDED_PARTITION;
- if (!compute_start_sect(ep, eep) || !compute_start_sect(p, ep)) {
- ep->p.sys_type = EMPTY_PARTITION;
- ep->size = 0;
- return 0;
- }
-
- return 1;
-}
-
-static int
-read_line(int pno, struct part_desc *ep, char *dev, int interactive,
- struct disk_desc *z)
-{
- unsigned char line[1000];
- unsigned char *fields[11];
- int fno, pct = pno % 4;
- struct part_desc p, *orig;
- unsigned long ff, ff1, ul, ml, ml1, def;
- int format, lpno, is_extd;
-
- if (eof || eob)
- return -1;
-
- lpno = index_to_linux(pno, z);
-
- if (interactive) {
- if (pct == 0 && (show_extended || pno == 0))
- warn("\n");
- warn("%8s%d: ", dev, lpno);
- }
-
- /* read input line - skip blank lines when reading from a file */
- do {
- fno = read_stdin(fields, line, SIZE(fields), SIZE(line));
- } while (fno == RD_CMD || (fno == 0 && !interactive));
- if (fno == RD_EOF) {
- return -1;
- } else if (fno > 10 && *(fields[10]) != 0) {
- printf("too many input fields\n");
- return 0;
- }
-
- if (fno == 1 && !strcmp(fields[0], ".")) {
- eob = 1;
- return -1;
- }
-
- /* use specified format, but round to cylinders if F_MEGABYTE specified */
- format = 0;
- if (B.cylindersize && specified_format == F_MEGABYTE)
- format = F_CYLINDER;
-
- orig = (one_only ? &(oldp.partitions[pno]) : 0);
-
- p = zero_part_desc;
- p.ep = ep;
-
- /* first read the type - we need to know whether it is extended */
- /* stop reading when input blank (defaults) and all is full */
- is_extd = 0;
- if (fno == 0) { /* empty line */
- if (orig && is_extended(orig->p.sys_type))
- is_extd = 1;
- ff = first_free(pno, is_extd, ep, format, 0, z);
- ml = max_length(pno, is_extd, ep, format, ff, z);
- if (ml == 0 && is_extd == 0) {
- is_extd = 1;
- ff = first_free(pno, is_extd, ep, format, 0, z);
- ml = max_length(pno, is_extd, ep, format, ff, z);
- }
- if (ml == 0 && pno >= 4) {
- /* no free blocks left - don't read any further */
- warn("No room for more\n");
- return -1;
- }
- }
- if (fno < 3 || !*(fields[2]))
- ul = orig ? orig->p.sys_type :
- (is_extd || (pno > 3 && pct == 1 && show_extended))
- ? EXTENDED_PARTITION : LINUX_NATIVE;
- else if (!strcmp(fields[2], "L"))
- ul = LINUX_NATIVE;
- else if (!strcmp(fields[2], "S"))
- ul = LINUX_SWAP;
- else if (!strcmp(fields[2], "E"))
- ul = EXTENDED_PARTITION;
- else if (!strcmp(fields[2], "X"))
- ul = LINUX_EXTENDED;
- else if (get_ul(fields[2], &ul, LINUX_NATIVE, 16))
- return 0;
- if (ul > 255) {
- warn("Illegal type\n");
- return 0;
- }
- p.p.sys_type = ul;
- is_extd = is_extended(ul);
-
- /* find start */
- ff = first_free(pno, is_extd, ep, format, 0, z);
- ff1 = ff * unitsize(format);
- def = orig ? orig->start : (pno > 4 && pct > 1) ? 0 : ff1;
- if (fno < 1 || !*(fields[0]))
- p.start = def;
- else {
- if (get_ul(fields[0], &ul, def / unitsize(0), 0))
- return 0;
- p.start = ul * unitsize(0);
- p.start -= (p.start % unitsize(format));
- }
-
- /* find length */
- ml =
- max_length(pno, is_extd, ep, format, p.start / unitsize(format),
- z);
- ml1 = ml * unitsize(format);
- def = orig ? orig->size : (pno > 4 && pct > 1) ? 0 : ml1;
- if (fno < 2 || !*(fields[1]))
- p.size = def;
- else {
- if (get_ul(fields[1], &ul, def / unitsize(0), 0))
- return 0;
- p.size = ul * unitsize(0) + unitsize(format) - 1;
- p.size -= (p.size % unitsize(format));
- }
- if (p.size > ml1) {
- warn("Warning: exceeds max allowable size (%lu)\n",
- ml1 / unitsize(0));
- if (!force)
- return 0;
- }
- if (p.size == 0 && pno >= 4 && (fno < 2 || !*(fields[1]))) {
- warn("Warning: empty partition\n");
- if (!force)
- return 0;
- }
- p.p.nr_sects = p.size;
-
- if (p.size == 0 && !orig) {
- if (fno < 1 || !*(fields[0]))
- p.start = 0;
- if (fno < 3 || !*(fields[2]))
- p.p.sys_type = EMPTY_PARTITION;
- }
-
- if (p.start < ff1 && p.size > 0) {
- warn("Warning: bad partition start (earliest %lu)\n",
- (ff1 + unitsize(0) - 1) / unitsize(0));
- if (!force)
- return 0;
- }
-
- if (fno < 4 || !*(fields[3]))
- ul = (orig ? orig->p.bootable : 0);
- else if (!strcmp(fields[3], "-"))
- ul = 0;
- else if (!strcmp(fields[3], "*") || !strcmp(fields[3], "+"))
- ul = 0x80;
- else {
- warn("unrecognized bootable flag - choose - or *\n");
- return 0;
- }
- p.p.bootable = ul;
-
- if (ep && ep->p.sys_type == EMPTY_PARTITION) {
- if (!build_surrounding_extended(&p, ep, z))
- return 0;
- } else if (!compute_start_sect(&p, ep))
- return 0;
-
- {
- longchs aa = chs_to_longchs(p.p.begin_chs), bb;
-
- if (fno < 5) {
- bb = aa;
- } else if (fno < 7) {
- warn("partial c,h,s specification?\n");
- return 0;
- } else if (get_ul(fields[4], &bb.c, aa.c, 0) ||
- get_ul(fields[5], &bb.h, aa.h, 0) ||
- get_ul(fields[6], &bb.s, aa.s, 0))
- return 0;
- p.p.begin_chs = longchs_to_chs(bb, B);
- }
- {
- longchs aa = chs_to_longchs(p.p.end_chs), bb;
-
- if (fno < 8) {
- bb = aa;
- } else if (fno < 10) {
- warn("partial c,h,s specification?\n");
- return 0;
- } else if (get_ul(fields[7], &bb.c, aa.c, 0) ||
- get_ul(fields[8], &bb.h, aa.h, 0) ||
- get_ul(fields[9], &bb.s, aa.s, 0))
- return 0;
- p.p.end_chs = longchs_to_chs(bb, B);
- }
-
- if (pno > 3 && p.size && show_extended
- && p.p.sys_type != EMPTY_PARTITION
- && (is_extended(p.p.sys_type) != (pct == 1))) {
- warn("Extended partition not where expected\n");
- if (!force)
- return 0;
- }
-
- z->partitions[pno] = p;
- if (pno >= z->partno)
- z->partno += 4; /* reqd for out_partition() */
-
- if (interactive)
- out_partition(dev, 0, &(z->partitions[pno]), z, B);
-
- return 1;
-}
-
-/* ep either points to the extended partition to contain this one,
- or to the empty partition that may become extended or is 0 */
-static int
-read_partition(char *dev, int interactive, int pno, struct part_desc *ep,
- struct disk_desc *z)
-{
- struct part_desc *p = &(z->partitions[pno]);
- int i;
-
- if (one_only) {
- *p = oldp.partitions[pno];
- if (one_only_pno != pno)
- goto ret;
- } else if (!show_extended && pno > 4 && pno % 4)
- goto ret;
-
- while (!(i = read_line(pno, ep, dev, interactive, z)))
- if (!interactive)
- fatalError("bad input\n");
- if (i < 0) {
- p->ep = ep;
- return 0;
- }
-
- ret:
- p->ep = ep;
- if (pno >= z->partno)
- z->partno += 4;
- return 1;
-}
-
-static void
-read_partition_chain(char *dev, int interactive, struct part_desc *ep,
- struct disk_desc *z)
-{
- int i, base;
-
- eob = 0;
- while (1) {
- base = z->partno;
- if (base + 4 > SIZE(z->partitions)) {
- printf("too many partitions\n");
- break;
- }
- for (i = 0; i < 4; i++)
- if (!read_partition(dev, interactive, base + i, ep, z))
- return;
- for (i = 0; i < 4; i++) {
- ep = &(z->partitions[base + i]);
- if (is_extended(ep->p.sys_type) && ep->size)
- break;
- }
- if (i == 4) {
- /* nothing found - maybe an empty partition is going
- to be extended */
- if (one_only || show_extended)
- break;
- ep = &(z->partitions[base + 1]);
- if (ep->size || ep->p.sys_type != EMPTY_PARTITION)
- break;
- }
- }
-}
-
-static void read_input(char *dev, int interactive, struct disk_desc *z)
-{
- int i;
- struct part_desc *partitions = &(z->partitions[0]), *ep;
-
- for (i = 0; i < SIZE(z->partitions); i++)
- partitions[i] = zero_part_desc;
- z->partno = 0;
-
- if (interactive)
- warn
- ("Input in the following format; absent fields get a default value.\n"
- "<start> <size> <type [E,S,L,X,hex]> <bootable [-,*]> <c,h,s> <c,h,s>\n"
- "Usually you only need to specify <start> and <size> (and perhaps <type>).\n");
- eof = 0;
-
- for (i = 0; i < 4; i++)
- read_partition(dev, interactive, i, 0, z);
- for (i = 0; i < 4; i++) {
- ep = partitions + i;
- if (is_extended(ep->p.sys_type) && ep->size)
- read_partition_chain(dev, interactive, ep, z);
- }
- add_sector_and_offset(z);
-}
-
-/*
- * G. The command line
- */
-
-static void version(void)
-{
- printf("%s %s %s (aeb@cwi.nl, %s)\n", PROGNAME, "version", VERSION,
- DATE);
-}
-
-static char short_opts[] = "cdfgilnqsu:vx?1A::C:DH:I:LN:O:RS:TU::V";
-
-#define PRINT_ID 0400
-#define CHANGE_ID 01000
-
-static const struct option long_opts[] = {
- {"change-id", no_argument, NULL, 'c' + CHANGE_ID},
- {"print-id", no_argument, NULL, 'c' + PRINT_ID},
- {"id", no_argument, NULL, 'c'},
- {"dump", no_argument, NULL, 'd'},
- {"force", no_argument, NULL, 'f'},
- {"show-geometry", no_argument, NULL, 'g'},
- {"increment", no_argument, NULL, 'i'},
- {"list", no_argument, NULL, 'l'},
- {"quiet", no_argument, NULL, 'q'},
- {"show-size", no_argument, NULL, 's'},
- {"unit", required_argument, NULL, 'u'},
- {"version", no_argument, NULL, 'v'},
- {"show-extended", no_argument, NULL, 'x'},
- {"help", no_argument, NULL, '?'},
- {"one-only", no_argument, NULL, '1'},
- {"cylinders", required_argument, NULL, 'C'},
- {"heads", required_argument, NULL, 'H'},
- {"sectors", required_argument, NULL, 'S'},
- {"activate", optional_argument, NULL, 'A'},
- {"DOS", no_argument, NULL, 'D'},
- {"Linux", no_argument, NULL, 'L'},
- {"re-read", no_argument, NULL, 'R'},
- {"list-types", no_argument, NULL, 'T'},
- {"unhide", optional_argument, NULL, 'U'},
- {"no-reread", no_argument, NULL, 160},
- {"IBM", no_argument, NULL, 161},
- {"leave-last", no_argument, NULL, 161},
-/* undocumented flags - not all completely implemented */
- {"in-order", no_argument, NULL, 128},
- {"not-in-order", no_argument, NULL, 129},
- {"inside-outer", no_argument, NULL, 130},
- {"not-inside-outer", no_argument, NULL, 131},
- {"nested", no_argument, NULL, 132},
- {"chained", no_argument, NULL, 133},
- {"onesector", no_argument, NULL, 134},
- {NULL, 0, NULL, 0}
-};
-
-/* default devices to list */
-static struct devd {
- char *pref, *letters;
-} defdevs[] = {
- {
- "hd", "abcdefgh"}, {
- "sd", "abcde"}, {
- "xd", "ab"}, {
- "ed", "abcd"}
-};
-
-static int is_ide_cdrom(char *device)
-{
- /* No device was given explicitly, and we are trying some
- likely things. But opening /dev/hdc may produce errors like
- "hdc: tray open or drive not ready"
- if it happens to be a CD-ROM drive. So try to be careful.
- This only works since 2.1.73. */
-
- FILE *procf;
- char buf[100];
- struct stat statbuf;
-
- sprintf(buf, "/proc/ide/%s/media", device + 5);
- procf = fopen(buf, "r");
- if (procf != NULL && fgets(buf, sizeof(buf), procf))
- return !strncmp(buf, "cdrom", 5);
-
- /* Now when this proc file does not exist, skip the
- device when it is read-only. */
- if (stat(device, &statbuf) == 0)
- return (statbuf.st_mode & 0222) == 0;
-
- return 0;
-}
-
-static void do_list(char *dev, int silent);
-static void do_size(char *dev, int silent);
-static void do_geom(char *dev, int silent);
-static void do_fdisk(char *dev);
-static void do_reread(char *dev);
-static void do_change_id(char *dev, char *part, char *id);
-static void do_unhide(char **av, int ac, char *arg);
-static void do_activate(char **av, int ac, char *arg);
-
-static int total_size;
-
-extern int sfdisk_main(int argc, char **argv)
-{
- int c;
- char *dev;
- int opt_size = 0;
- int opt_out_geom = 0;
- int opt_reread = 0;
- int activate = 0;
- int do_id = 0;
- int unhide = 0;
- char *activatearg = 0;
- char *unhidearg = 0;
-
- if (argc < 1)
- usage(sfdisk_usage);
-
- while ((c = getopt_long(argc, argv, short_opts, long_opts, NULL)) !=
- -1) {
- switch (c) {
- case 'f':
- force = 1;
- break; /* does not imply quiet */
- case 'g':
- opt_out_geom = 1;
- break;
- case 'i':
- increment = 1;
- break;
- case 'c':
- case 'c' + PRINT_ID:
- case 'c' + CHANGE_ID:
- do_id = c;
- break;
- case 'd':
- dump = 1; /* fall through */
- case 'l':
- opt_list = 1;
- break;
- case 'n':
- no_write = 1;
- break;
- case 'q':
- quiet = 1;
- break;
- case 's':
- opt_size = 1;
- break;
- case 'u':
- set_format(*optarg);
- break;
- case 'v':
- version();
- exit(0);
- case 'x':
- show_extended = 1;
- break;
- case 'A':
- activatearg = optarg;
- activate = 1;
- break;
- case 'C':
- U.cylinders = atoi(optarg);
- break;
- case 'D':
- DOS = 1;
- break;
- case 'H':
- U.heads = atoi(optarg);
- break;
- case 'L':
- Linux = 1;
- break;
- case 'N':
- one_only = atoi(optarg);
- break;
- case 'I':
- restore_sector_file = optarg;
- break;
- case 'O':
- save_sector_file = optarg;
- break;
- case 'R':
- opt_reread = 1;
- break;
- case 'S':
- U.sectors = atoi(optarg);
- break;
- case 'T':
- list_types();
- exit(0);
- case 'U':
- unhidearg = optarg;
- unhide = 1;
- break;
- case 'V':
- verify = 1;
- break;
- case '?':
- default:
- usage(sfdisk_usage);
-
- /* undocumented flags */
- case 128:
- partitions_in_order = 1;
- break;
- case 129:
- partitions_in_order = 0;
- break;
- case 130:
- all_logicals_inside_outermost_extended = 1;
- break;
- case 131:
- all_logicals_inside_outermost_extended = 0;
- break;
- case 132:
- boxes = NESTED;
- break;
- case 133:
- boxes = CHAINED;
- break;
- case 134:
- boxes = ONESECTOR;
- break;
-
- /* more flags */
- case 160:
- no_reread = 1;
- break;
- case 161:
- leave_last = 1;
- break;
- }
- }
-
- if (optind == argc && (opt_list || opt_out_geom || opt_size || verify)) {
- struct devd *dp;
- char *lp;
- char device[10];
-
- total_size = 0;
-
- for (dp = defdevs; dp - defdevs < SIZE(defdevs); dp++) {
- lp = dp->letters;
- while (*lp) {
- sprintf(device, "/dev/%s%c", dp->pref, *lp++);
- if (!strcmp(dp->pref, "hd") && is_ide_cdrom(device))
- continue;
- if (opt_out_geom)
- do_geom(device, 1);
- if (opt_size)
- do_size(device, 1);
- if (opt_list || verify)
- do_list(device, 1);
- }
- }
-
- if (opt_size)
- printf("total: %d blocks\n", total_size);
-
- exit(exit_status);
- }
-
- if (optind == argc)
- usage(sfdisk_usage);
-
- if (opt_list || opt_out_geom || opt_size || verify) {
- while (optind < argc) {
- if (opt_out_geom)
- do_geom(argv[optind], 0);
- if (opt_size)
- do_size(argv[optind], 0);
- if (opt_list || verify)
- do_list(argv[optind], 0);
- optind++;
- }
- exit(exit_status);
- }
-
- if (activate) {
- do_activate(argv + optind, argc - optind, activatearg);
- exit(exit_status);
- }
- if (unhide) {
- do_unhide(argv + optind, argc - optind, unhidearg);
- exit(exit_status);
- }
- if (do_id) {
- if ((do_id & PRINT_ID) != 0 && optind != argc - 2)
- fatalError("usage: sfdisk --print-id device partition-number\n");
- else if ((do_id & CHANGE_ID) != 0 && optind != argc - 3)
- fatalError
- ("usage: sfdisk --change-id device partition-number Id\n");
- else if (optind != argc - 3 && optind != argc - 2)
- fatalError("usage: sfdisk --id device partition-number [Id]\n");
- do_change_id(argv[optind], argv[optind + 1],
- (optind == argc - 2) ? 0 : argv[optind + 2]);
- exit(exit_status);
- }
-
- if (optind != argc - 1)
- fatalError("can specify only one device (except with -l or -s)\n");
- dev = argv[optind];
-
- if (opt_reread)
- do_reread(dev);
- else if (restore_sector_file)
- restore_sectors(dev);
- else
- do_fdisk(dev);
-
- return (TRUE);
-}
-
-/*
- * H. Listing the current situation
- */
-
-static int my_open(char *dev, int rw, int silent)
-{
- int fd, mode;
-
- mode = (rw ? O_RDWR : O_RDONLY);
- fd = open(dev, mode);
- if (fd < 0 && !silent) {
- perror(dev);
- fatalError("cannot open %s %s\n", dev,
- rw ? "read-write" : "for reading");
- }
- return fd;
-}
-
-static void do_list(char *dev, int silent)
-{
- int fd;
- struct disk_desc *z;
-
- fd = my_open(dev, 0, silent);
- if (fd < 0)
- return;
-
- z = &oldp;
-
- free_sectors();
- get_cylindersize(dev, fd, dump ? 1 : opt_list ? 0 : 1);
- get_partitions(dev, fd, z);
-
- if (opt_list)
- out_partitions(dev, z);
-
- if (verify) {
- if (partitions_ok(z))
- warn("%s: OK\n", dev);
- else
- exit_status = 1;
- }
-}
-
-static void do_geom(char *dev, int silent)
-{
- int fd;
- struct hd_geometry g;
-
- fd = my_open(dev, 0, silent);
- if (fd < 0)
- return;
-
- /* get_cylindersize(dev, fd, silent); */
- if (!ioctl(fd, HDIO_GETGEO, &g))
- printf("%s: %d cylinders, %d heads, %d sectors/track\n",
- dev, g.cylinders, g.heads, g.sectors);
- else
- printf("%s: unknown geometry\n", dev);
-}
-
-/* for compatibility with earlier fdisk: provide option -s */
-static void do_size(char *dev, int silent)
-{
- int fd;
- long size;
-
- fd = my_open(dev, 0, silent);
- if (fd < 0)
- return;
-
- if (ioctl(fd, BLKGETSIZE, &size)) {
- if (!silent) {
- perror(dev);
- fatalError("BLKGETSIZE ioctl failed for %s\n", dev);
- }
- return;
- }
-
- size /= 2; /* convert sectors to blocks */
-
- /* a CDROM drive without mounted CD yields MAXINT */
- if (silent && size == ((1 << 30) - 1))
- return;
-
- if (silent)
- printf("%s: %9ld\n", dev, size);
- else
- printf("%ld\n", size);
-
- total_size += size;
-}
-
-/*
- * Activate: usually one wants to have a single primary partition
- * to be active. OS/2 fdisk makes non-bootable logical partitions
- * active - I don't know what that means to OS/2 Boot Manager.
- *
- * Call: activate /dev/hda 2 5 7 make these partitions active
- * and the remaining ones inactive
- * Or: sfdisk -A /dev/hda 2 5 7
- *
- * If only a single partition must be active, one may also use the form
- * sfdisk -A2 /dev/hda
- *
- * With "activate /dev/hda" or "sfdisk -A /dev/hda" the active partitions
- * are listed but not changed. To get zero active partitions, use
- * "activate /dev/hda none" or "sfdisk -A /dev/hda none".
- * Use something like `echo ",,,*" | sfdisk -N2 /dev/hda' to only make
- * /dev/hda2 active, without changing other partitions.
- *
- * A warning will be given if after the change not precisely one primary
- * partition is active.
- *
- * The present syntax was chosen to be (somewhat) compatible with the
- * activate from the LILO package.
- */
-static void set_active(struct disk_desc *z, char *pnam)
-{
- int pno;
-
- pno = asc_to_index(pnam, z);
- z->partitions[pno].p.bootable = 0x80;
-}
-
-static void do_activate(char **av, int ac, char *arg)
-{
- char *dev = av[0];
- int fd;
- int rw, i, pno, lpno;
- struct disk_desc *z;
-
- z = &oldp;
-
- rw = (!no_write && (arg || ac > 1));
- fd = my_open(dev, rw, 0);
-
- free_sectors();
- get_cylindersize(dev, fd, 1);
- get_partitions(dev, fd, z);
-
- if (!arg && ac == 1) {
- /* list active partitions */
- for (pno = 0; pno < z->partno; pno++) {
- if (z->partitions[pno].p.bootable) {
- lpno = index_to_linux(pno, z);
- if (pno == linux_to_index(lpno, z))
- printf("%s%d\n", dev, lpno);
- else
- printf("%s#%d\n", dev, pno);
- if (z->partitions[pno].p.bootable != 0x80)
- warn("bad active byte: 0x%x instead of 0x80\n",
- z->partitions[pno].p.bootable);
- }
- }
- } else {
- /* clear `active byte' everywhere */
- for (pno = 0; pno < z->partno; pno++)
- z->partitions[pno].p.bootable = 0;
-
- /* then set where desired */
- if (ac == 1)
- set_active(z, arg);
- else
- for (i = 1; i < ac; i++)
- set_active(z, av[i]);
-
- /* then write to disk */
- if (write_partitions(dev, fd, z))
- warn("Done\n\n");
- else
- exit_status = 1;
- }
- i = 0;
- for (pno = 0; pno < z->partno && pno < 4; pno++)
- if (z->partitions[pno].p.bootable)
- i++;
- if (i != 1)
- warn
- ("You have %d active primary partitions. This does not matter for LILO,\n"
- "but the DOS MBR will only boot a disk with 1 active partition.\n",
- i);
-}
-
-static void set_unhidden(struct disk_desc *z, char *pnam)
-{
- int pno;
- unsigned char id;
-
- pno = asc_to_index(pnam, z);
- id = z->partitions[pno].p.sys_type;
- if (id == 0x11 || id == 0x14 || id == 0x16 || id == 0x17)
- id -= 0x10;
- else
- fatalError("partition %s has id %x and is not hidden\n", pnam, id);
- z->partitions[pno].p.sys_type = id;
-}
-
-/*
- * maybe remove and make part of --change-id
- */
-static void do_unhide(char **av, int ac, char *arg)
-{
- char *dev = av[0];
- int fd, rw, i;
- struct disk_desc *z;
-
- z = &oldp;
-
- rw = !no_write;
- fd = my_open(dev, rw, 0);
-
- free_sectors();
- get_cylindersize(dev, fd, 1);
- get_partitions(dev, fd, z);
-
- /* unhide where desired */
- if (ac == 1)
- set_unhidden(z, arg);
- else
- for (i = 1; i < ac; i++)
- set_unhidden(z, av[i]);
-
- /* then write to disk */
- if (write_partitions(dev, fd, z))
- warn("Done\n\n");
- else
- exit_status = 1;
-}
-
-static void do_change_id(char *dev, char *pnam, char *id)
-{
- int fd, rw, pno;
- struct disk_desc *z;
- unsigned long i;
-
- z = &oldp;
-
- rw = !no_write;
- fd = my_open(dev, rw, 0);
-
- free_sectors();
- get_cylindersize(dev, fd, 1);
- get_partitions(dev, fd, z);
-
- pno = asc_to_index(pnam, z);
- if (id == 0) {
- printf("%x\n", z->partitions[pno].p.sys_type);
- return;
- }
- i = strtoul(id, NULL, 16);
- if (i > 255)
- fatalError("Bad Id %lx\n", i);
- z->partitions[pno].p.sys_type = i;
-
- if (write_partitions(dev, fd, z))
- warn("Done\n\n");
- else
- exit_status = 1;
-}
-
-static void do_reread(char *dev)
-{
- int fd;
-
- fd = my_open(dev, 0, 0);
- if (reread_ioctl(fd))
- printf("This disk is currently in use.\n");
-}
-
-/*
- * I. Writing the new situation
- */
-
-static void do_fdisk(char *dev)
-{
- int fd;
- int c, answer;
- struct stat statbuf;
- int interactive = isatty(0);
- struct disk_desc *z;
-
- if (stat(dev, &statbuf) < 0) {
- perror(dev);
- fatalError("Fatal error: cannot find %s\n", dev);
- }
- if (!S_ISBLK(statbuf.st_mode)) {
- warn("Warning: %s is not a block device\n", dev);
- no_reread = 1;
- }
- fd = my_open(dev, !no_write, 0);
-
- if (!no_write && !no_reread) {
- warn("Checking that no-one is using this disk right now ...\n");
- if (reread_ioctl(fd)) {
- printf
- ("\nThis disk is currently in use - repartitioning is probably a bad idea."
- "Umount all file systems, and swapoff all swap partitions on this disk."
- "Use the --no-reread flag to suppress this check.\n");
- if (!force) {
- printf("Use the --force flag to overrule all checks.\n");
- exit(1);
- }
- } else
- warn("OK");
- }
-
- z = &oldp;
-
- free_sectors();
- get_cylindersize(dev, fd, 0);
- get_partitions(dev, fd, z);
-
- printf("Old situation:\n");
- out_partitions(dev, z);
-
- if (one_only && (one_only_pno = linux_to_index(one_only, z)) < 0)
- fatalError("Partition %d does not exist, cannot change it\n", one_only);
-
- z = &newp;
-
- while (1) {
-
- read_input(dev, interactive, z);
-
- printf("New situation:\n");
- out_partitions(dev, z);
-
- if (!partitions_ok(z) && !force) {
- if (!interactive)
- fatalError("I don't like these partitions - nothing changed.\n"
- "(If you really want this, use the --force option.)\n");
- else
- printf
- ("I don't like this - probably you should answer No\n");
- }
- ask:
- if (interactive) {
- if (no_write)
- printf("Are you satisfied with this? [ynq] ");
- else
- printf("Do you want to write this to disk? [ynq] ");
- answer = c = getchar();
- while (c != '\n' && c != EOF)
- c = getchar();
- if (c == EOF)
- printf("\nsfdisk: premature end of input\n");
- if (c == EOF || answer == 'q' || answer == 'Q') {
- fatalError("Quitting - nothing changed\n");
- } else if (answer == 'n' || answer == 'N') {
- continue;
- } else if (answer == 'y' || answer == 'Y') {
- break;
- } else {
- printf("Please answer one of y,n,q\n");
- goto ask;
- }
- } else
- break;
- }
-
- if (write_partitions(dev, fd, z))
- printf("Successfully wrote the new partition table\n\n");
- else
- exit_status = 1;
-
- reread_disk_partition(dev, fd);
-
- warn
- ("If you created or changed a DOS partition, /dev/foo7, say, then use dd(1)\n"
- "to zero the first 512 bytes: dd if=/dev/zero of=/dev/foo7 bs=512 count=1\n"
- "(See fdisk(8).)\n");
-
- sync(); /* superstition */
- sleep(3);
- exit(exit_status);
-}
projects / oweals / busybox.git / commitdiff