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Diffstat (limited to 'sfdisk.c')
| -rw-r--r-- | sfdisk.c | 2999 |
1 files changed, 0 insertions, 2999 deletions
diff --git a/sfdisk.c b/sfdisk.c deleted file mode 100644 index 8d2142b7c..000000000 --- a/sfdisk.c +++ /dev/null @@ -1,2999 +0,0 @@ -/* 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); -} |