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+/*
+ * 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 */
+
+
+static const char sfdisk_usage[] =
+"Usage: sfdisk [options] device ...\n"
+"device: 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";
+
+
+
+/* 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, ...) {
+ va_list p;
+
+ va_start(p, s);
+ fflush(stdout);
+ if (!quiet)
+ vfprintf (stderr, s, p);
+ va_end(p);
+}
+
+static void
+error(char *s, ...) {
+ va_list p;
+
+ va_start(p, s);
+ fflush(stdout);
+ fprintf(stderr, "\n" PROGNAME ": ");
+ vfprintf(stderr, s, p);
+ va_end(p);
+}
+
+static void
+fatal(char *s, ...) {
+ va_list p;
+
+ va_start(p, s);
+ fflush(stdout);
+ fprintf(stderr, "\n" PROGNAME ": ");
+ vfprintf(stderr, s, p);
+ va_end(p);
+ exit(1);
+}
+
+/*
+ * 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");
+ error("seek error on %s - cannot seek to %lu\n", dev, s);
+ return 0;
+ }
+
+ if (in != out) {
+ error("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;
+
+ if (!(s = (struct sector *) malloc(sizeof(struct sector))))
+ fatal("out of memory - giving up\n");
+
+ if (read(fd, s->data, sizeof(s->data)) != sizeof(s->data)) {
+ perror("read");
+ error("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) {
+ error("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");
+ error("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);
+ error("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");
+ error("read error on %s - cannot read sector %lu\n",
+ dev, s->sectornumber);
+ return 0;
+ }
+ if (write(fdout, ss, sizeof(ss)) != sizeof(ss)) {
+ perror("write");
+ error("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);
+ error("cannot stat partition restore file (%s)\n",
+ restore_sector_file);
+ return 0;
+ }
+ if (statbuf.st_size % 516) {
+ error("partition restore file has wrong size - not restoring\n");
+ return 0;
+ }
+ if (!(ss = (char *) malloc(statbuf.st_size))) {
+ error("out of memory?\n");
+ return 0;
+ }
+ fdin = open(restore_sector_file, O_RDONLY);
+ if (fdin < 0) {
+ perror(restore_sector_file);
+ error("cannot open partition restore file (%s)\n",
+ restore_sector_file);
+ return 0;
+ }
+ if (read(fdin, ss, statbuf.st_size) != statbuf.st_size) {
+ perror("read");
+ error("error reading %s\n"), restore_sector_file;
+ return 0;
+ }
+
+ fdout = open(dev, O_WRONLY);
+ if (fdout < 0) {
+ perror(dev);
+ error("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);
+ error("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=%d - 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 (%d - 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: "
+ "%d (should be in 0-%d)\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: "
+ "%d (should be in 1-%d)\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: "
+ "%d (should be in 0-%d)\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))
+ fatal("%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)
+ fatal("no partition table present.\n");
+ else
+ fatal("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)) {
+ fatal("Failed saving the old sectors - aborting\n");
+ return 0;
+ }
+ }
+ if (!write_sectors(dev, fd)) {
+ error("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')))
+ fatal("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
+ fatal("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 != ';')
+ fatal("input error: unexpected character %c after %s field\n",
+ *ip, d->fldname);
+ *ip = 0;
+ goto nxtfld;
+ }
+ }
+ fatal("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)
+ fatal("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)
+ fatal("usage: sfdisk --print-id device partition-number\n");
+ else if ((do_id & CHANGE_ID) != 0 && optind != argc-3)
+ fatal("usage: sfdisk --change-id device partition-number Id\n");
+ else if (optind != argc-3 && optind != argc-2)
+ fatal("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)
+ fatal("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);
+ fatal("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);
+ fatal("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
+ fatal("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)
+ fatal("Bad Id %x\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);
+ fatal("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)
+ fatal("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)
+ fatal("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') {
+ fatal("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);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-27 01:33:25 +0000