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-rw-r--r--sbin/i386/fdisk/Makefile9
-rw-r--r--sbin/i386/fdisk/fdisk.8177
-rw-r--r--sbin/i386/fdisk/fdisk.c686
3 files changed, 872 insertions, 0 deletions
diff --git a/sbin/i386/fdisk/Makefile b/sbin/i386/fdisk/Makefile
new file mode 100644
index 000000000000..38e3faddaa73
--- /dev/null
+++ b/sbin/i386/fdisk/Makefile
@@ -0,0 +1,9 @@
+# @(#)Makefile 1.1 (Julian Elischer) 3/28/93
+#
+#
+
+PROG= fdisk
+SRCS= fdisk.c
+MAN8= fdisk.0
+
+.include <bsd.prog.mk>
diff --git a/sbin/i386/fdisk/fdisk.8 b/sbin/i386/fdisk/fdisk.8
new file mode 100644
index 000000000000..078ae5ea3884
--- /dev/null
+++ b/sbin/i386/fdisk/fdisk.8
@@ -0,0 +1,177 @@
+.Dd April 4, 1993
+.Dt FDISK 8
+.\".Os BSD 4
+.Sh NAME
+.Nm fdisk
+.Nd DOS partition maintainance program
+.Sh SYNOPSIS
+.Nm
+.Op Fl i
+.Op Fl u
+.Bl -tag -width time
+.It Fl i
+Initializes sector 0 of the disk.
+.It Fl u
+Is used for updating (editing) sector 0 of the disk.
+.El
+.Sh PROLOGUE
+In order for the BIOS to boot the kernel,
+certain conventions must be adhered to.
+Sector 0 of the disk must contain boot code,
+a partition table,
+and a magic number.
+BIOS partitions can be used to break the disk up into several pieces.
+The BIOS brings in sector 0
+(does it really use the code?)
+and verifies the magic number.
+It then searches the 4 BIOS partitions described by sector 0
+to determine which of them is
+.Em active.
+This boot then brings in the secondary boot block from the
+.Em active
+partition and runs it.
+Under DOS,
+you could have one or more partitions with one
+.Em active.
+The DOS
+.Nm
+program can be used to divide space on the disk into partitions and set one
+.Em active.
+.Sh DESCRIPTION
+The 386bsd program
+.Nm
+serves a similar purpose to the DOS program.
+When called with no arguments, it prints the sector 0 partition table.
+An example follows:
+
+.Bd -literal
+ ******* Working on device /dev/rwd0d *******
+ parameters extracted from in-core disklabel are:
+ cylinders=769 heads=15 sectors/track=33 (495 blks/cyl)
+
+ parameters to be used for BIOS calculations are:
+ cylinders=769 heads=15 sectors/track=33 (495 blks/cyl)
+
+ Warning: BIOS sector numbering starts with sector 1
+ Information from DOS bootblock is:
+ The data for partition 0 is:
+ sysid 165,(386BSD)
+ start 495, size 380160 (185 Meg), flag 0
+ beg: cyl 1/ sector 1/ head 0;
+ end: cyl 768/ sector 33/ head 14
+ The data for partition 1 is:
+ sysid 164,(unknown)
+ start 378180, size 2475 (1 Meg), flag 0
+ beg: cyl 764/ sector 1/ head 0;
+ end: cyl 768/ sector 33/ head 14
+ The data for partition 2 is:
+ <UNUSED>
+ The data for partition 3 is:
+ sysid 99,(ISC UNIX, other System V/386, GNU HURD or Mach)
+ start 380656, size 224234 (109 Meg), flag 80
+ beg: cyl 769/ sector 2/ head 0;
+ end: cyl 197/ sector 33/ head 14
+.Ed
+.Pp
+The disk is divided into three parititions that happen to fill the disk.
+The second partition overlaps the end of the first.
+(Used for debugging purposes)
+.Bl -tag -width "cyl, sector and head"
+.It Em "sysid"
+is used to label the partition. 386bsd reserves the
+magic number 165 decimal (A5 in hex).
+.It Em "start and size"
+fields provide the start address
+and size of a parition in sectors.
+.It Em "flag 80"
+specifies that this is the active partition.
+.It Em "cyl, sector and head"
+fields are used to specify the beginning address
+and end address for the parititon.
+.It Em "Note:"
+these numbers are calculated using BIOS's understanding of the disk geometry
+and saved in the bootblock.
+.El
+.Pp
+The flags
+.Fl i
+or
+.Fl u
+are used to indicate that the paritition data is to be updated.
+The
+.Nm
+program will enter a conversational mode.
+This mode is designed not to change any data unless you explicitly tell it to.
+.Nm
+selects defaults for its questions to guarantee the above behaviour.
+.Pp
+It displays each partition
+and ask if you want to edit it.
+If you say yes,
+it will step through each field showing the old value
+and asking for a new one.
+When you are done with a partition,
+.Nm
+will display it and ask if it is correct.
+.Nm
+will then procede to the next entry.
+.Pp
+Getting the
+.Em cyl, sector,
+and
+.Em head
+fields correct is tricky.
+So by default,
+they will be calculated for you;
+you can specify them if you choose.
+.Pp
+After all the partitions are processed,
+you are given the option to change the
+.Em active
+partition.
+Finally,
+when the all the data for the first sector has been accumulated,
+you are asked if you really want to rewrite sector 0.
+Only if you answer yes,
+will the data be written to disk.
+.Pp
+The difference between the
+.Fl u
+flag and
+.Fl i
+flag is that
+the
+.Fl u
+flag just edits the fields as they appear on the disk.
+While the
+.Fl i
+flag is used to "initialize" sector 0;
+it will setup the last BIOS partition to use the whole disk for 386bsd;
+and make it active.
+.Sh NOTES
+.Pp
+The automatic calculation of starting cylinder etc. uses
+a set of figures that represent what the BIOS thinks is the
+geometry of the drive.
+These figures are by default taken from the incore disklabel,
+but the program initially gives you an oportunity to change them.
+This allows the user to create a bootblock that can work with drives
+that use geometry translation under the BIOS.
+.Pp
+If you hand craft your disk layout,
+please make sure that the 386bsd partition starts on a cylinder boundary.
+A number of decisions made later may assume this.
+(This might not be necessary later.)
+.Pp
+Editing an existing partition will most likely cause you to
+lose all the data in that partition.
+.Pp
+You should run this program interactively once or twice to see how it works.
+This is completely safe as long as you answer the last question in the negative.
+There are subtleties
+that the program detects
+that are not fully explained in this manual page.
+.Sh SEE ALSO
+.Xr disklabel 8
+.Sh BUGS
+One less now, but probably more
diff --git a/sbin/i386/fdisk/fdisk.c b/sbin/i386/fdisk/fdisk.c
new file mode 100644
index 000000000000..7fb728d67d20
--- /dev/null
+++ b/sbin/i386/fdisk/fdisk.c
@@ -0,0 +1,686 @@
+/*
+ * Mach Operating System
+ * Copyright (c) 1992 Carnegie Mellon University
+ * All Rights Reserved.
+ *
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ *
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * Carnegie Mellon requests users of this software to return to
+ *
+ * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
+ * School of Computer Science
+ * Carnegie Mellon University
+ * Pittsburgh PA 15213-3890
+ *
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ */
+
+#include <sys/types.h>
+#include <sys/disklabel.h>
+#include <stdio.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+
+int iotest;
+
+#define LBUF 100
+static char lbuf[LBUF];
+
+/*
+ *
+ * Ported to 386bsd by Julian Elischer Thu Oct 15 20:26:46 PDT 1992
+ *
+ * 14-Dec-89 Robert Baron (rvb) at Carnegie-Mellon University
+ * Copyright (c) 1989 Robert. V. Baron
+ * Created.
+ */
+
+#define Decimal(str, ans, tmp) if (decimal(str, &tmp, ans)) ans = tmp
+#define Hex(str, ans, tmp) if (hex(str, &tmp, ans)) ans = tmp
+#define String(str, ans, len) {char *z = ans; char **dflt = &z; if (string(str, dflt)) strncpy(ans, *dflt, len); }
+
+#define RoundCyl(x) ((((x) + cylsecs - 1) / cylsecs) * cylsecs)
+
+#define SECSIZE 512
+
+char *disk = "/dev/rwd0d";
+char *name;
+
+struct disklabel disklabel; /* disk parameters */
+
+int cyls, sectors, heads, cylsecs, disksecs;
+
+struct mboot
+{
+ unsigned char padding[2]; /* force the longs to be long alligned */
+ unsigned char bootinst[DOSPARTOFF];
+ struct dos_partition parts[4];
+ unsigned short int signature;
+};
+struct mboot mboot;
+
+#define ACTIVE 0x80
+#define BOOT_MAGIC 0xAA55
+
+int dos_cyls;
+int dos_heads;
+int dos_sectors;
+int dos_cylsecs;
+
+#define DOSSECT(s,c) ((s & 0x3f) | ((c >> 2) & 0xc0))
+#define DOSCYL(c) (c & 0xff)
+static int dos();
+char *get_type();
+static int partition = -1;
+
+
+static int a_flag = 0; /* set active partition */
+static int i_flag = 0; /* replace partition data */
+static int u_flag = 0; /* update partition data */
+
+static unsigned char bootcode[] = {
+0x33, 0xc0, 0xfa, 0x8e, 0xd0, 0xbc, 0x00, 0x7c, 0x8e, 0xc0, 0x8e, 0xd8, 0xfb, 0x8b, 0xf4, 0xbf,
+0x00, 0x06, 0xb9, 0x00, 0x02, 0xfc, 0xf3, 0xa4, 0xea, 0x1d, 0x06, 0x00, 0x00, 0xb0, 0x04, 0xbe,
+0xbe, 0x07, 0x80, 0x3c, 0x80, 0x74, 0x0c, 0x83, 0xc6, 0x10, 0xfe, 0xc8, 0x75, 0xf4, 0xbe, 0xbd,
+0x06, 0xeb, 0x43, 0x8b, 0xfe, 0x8b, 0x14, 0x8b, 0x4c, 0x02, 0x83, 0xc6, 0x10, 0xfe, 0xc8, 0x74,
+0x0a, 0x80, 0x3c, 0x80, 0x75, 0xf4, 0xbe, 0xbd, 0x06, 0xeb, 0x2b, 0xbd, 0x05, 0x00, 0xbb, 0x00,
+0x7c, 0xb8, 0x01, 0x02, 0xcd, 0x13, 0x73, 0x0c, 0x33, 0xc0, 0xcd, 0x13, 0x4d, 0x75, 0xef, 0xbe,
+0x9e, 0x06, 0xeb, 0x12, 0x81, 0x3e, 0xfe, 0x7d, 0x55, 0xaa, 0x75, 0x07, 0x8b, 0xf7, 0xea, 0x00,
+0x7c, 0x00, 0x00, 0xbe, 0x85, 0x06, 0x2e, 0xac, 0x0a, 0xc0, 0x74, 0x06, 0xb4, 0x0e, 0xcd, 0x10,
+0xeb, 0xf4, 0xfb, 0xeb, 0xfe,
+'M', 'i', 's', 's', 'i', 'n', 'g', ' ',
+ 'o', 'p', 'e', 'r', 'a', 't', 'i', 'n', 'g', ' ', 's', 'y', 's', 't', 'e', 'm', 0,
+'E', 'r', 'r', 'o', 'r', ' ', 'l', 'o', 'a', 'd', 'i', 'n', 'g', ' ',
+ 'o', 'p', 'e', 'r', 'a', 't', 'i', 'n', 'g', ' ', 's', 'y', 's', 't', 'e', 'm', 0,
+'I', 'n', 'v', 'a', 'l', 'i', 'd', ' ',
+ 'p', 'a', 'r', 't', 'i', 't', 'i', 'o', 'n', ' ', 't', 'a', 'b', 'l', 'e', 0,
+'A', 'u', 't', 'h', 'o', 'r', ' ', '-', ' ',
+ 'S', 'i', 'e', 'g', 'm', 'a', 'r', ' ', 'S', 'c', 'h', 'm', 'i', 'd', 't', 0,0,0,
+
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+};
+
+struct part_type
+{
+ unsigned char type;
+ char *name;
+}part_types[] =
+{
+ {0x00, "unused"}
+ ,{0x01, "Primary DOS with 12 bit FAT"}
+ ,{0x02, "XENIX / filesystem"}
+ ,{0x03, "XENIX /usr filesystem"}
+ ,{0x04, "Primary DOS with 16 bit FAT"}
+ ,{0x05, "Extended DOS"}
+ ,{0x06, "Primary 'big' DOS (> 32MB)"}
+ ,{0x07, "OS/2 HPFS, QNX or Advanced UNIX"}
+ ,{0x08, "AIX filesystem"}
+ ,{0x09, "AIX boot partition or Coherent"}
+ ,{0x0A, "OS/2 Boot Manager or OPUS"}
+ ,{0x10, "OPUS"}
+ ,{0x40, "VENIX 286"}
+ ,{0x50, "DM"}
+ ,{0x51, "DM"}
+ ,{0x52, "CP/M or Microport SysV/AT"}
+ ,{0x56, "GB"}
+ ,{0x61, "Speed"}
+ ,{0x63, "ISC UNIX, other System V/386, GNU HURD or Mach"}
+ ,{0x64, "Novell Netware 2.xx"}
+ ,{0x65, "Novell Netware 3.xx"}
+ ,{0x75, "PCIX"}
+ ,{0x80, "Minix 1.1 ... 1.4a"}
+ ,{0x81, "Minix 1.4b ... 1.5.10"}
+ ,{0x82, "Linux"}
+ ,{0x93, "Amoeba filesystem"}
+ ,{0x94, "Amoeba bad block table"}
+ ,{0xA5, "386BSD"}
+ ,{0xB7, "BSDI BSD/386 filesystem"}
+ ,{0xB8, "BSDI BSD/386 swap"}
+ ,{0xDB, "Concurrent CPM or C.DOS or CTOS"}
+ ,{0xE1, "Speed"}
+ ,{0xE3, "Speed"}
+ ,{0xE4, "Speed"}
+ ,{0xF1, "Speed"}
+ ,{0xF2, "DOS 3.3+ Secondary"}
+ ,{0xF4, "Speed"}
+ ,{0xFF, "BBT (Bad Blocks Table)"}
+};
+
+
+main(argc, argv)
+char **argv;
+{
+int i;
+
+ name = *argv;
+ {register char *cp = name;
+ while (*cp) if (*cp++ == '/') name = cp;
+ }
+
+ for ( argv++ ; --argc ; argv++ ) { register char *token = *argv;
+ if (*token++ != '-' || !*token)
+ break;
+ else { register int flag;
+ for ( ; flag = *token++ ; ) {
+ switch (flag) {
+ case '0':
+ partition = 0;
+ break;
+ case '1':
+ partition = 1;
+ break;
+ case '2':
+ partition = 2;
+ break;
+ case '3':
+ partition = 3;
+ break;
+ case 'a':
+ a_flag = 1;
+ break;
+ case 'i':
+ i_flag = 1;
+ case 'u':
+ u_flag = 1;
+ break;
+ default:
+ goto usage;
+ }
+ }
+ }
+ }
+
+ if (argc > 0)
+ disk = argv[0];
+
+ if (open_disk(u_flag) < 0)
+ exit(1);
+
+ printf("******* Working on device %s *******\n",disk);
+ if(u_flag)
+ {
+ get_params_to_use();
+ }
+ else
+ {
+ print_params();
+ }
+
+ if (read_s0())
+ init_sector0(1);
+
+ printf("Warning: BIOS sector numbering starts with sector 1\n");
+ printf("Information from DOS bootblock is:\n");
+ if (partition == -1)
+ for (i = 0; i < NDOSPART; i++)
+ change_part(i);
+ else
+ change_part(partition);
+
+ if (u_flag || a_flag)
+ change_active(partition);
+
+ if (u_flag || a_flag) {
+ printf("\nWe haven't changed the partition table yet. ");
+ printf("This is your last chance.\n");
+ print_s0(-1);
+ if (ok("Should we write new partition table?"))
+ write_s0();
+ }
+
+ exit(0);
+
+usage:
+ printf("fdisk {-a|-i|-r} {disk}\n");
+}
+
+print_s0(which)
+{
+int i;
+
+ print_params();
+ printf("Information from DOS bootblock is:\n");
+ if (which == -1)
+ for (i = 0; i < NDOSPART; i++)
+ printf("%d: ", i), print_part(i);
+ else
+ print_part(which);
+}
+
+static struct dos_partition mtpart = { 0 };
+
+print_part(i)
+{
+struct dos_partition *partp = ((struct dos_partition *) &mboot.parts) + i;
+
+
+ if (!bcmp(partp, &mtpart, sizeof (struct dos_partition))) {
+ printf("<UNUSED>\n");
+ return;
+ }
+ printf("sysid %d,(%s)\n", partp->dp_typ, get_type(partp->dp_typ));
+ printf(" start %d, size %d (%d Meg), flag %x\n",
+ partp->dp_start,
+ partp->dp_size, partp->dp_size * 512 / (1024 * 1024),
+ partp->dp_flag);
+ printf("\tbeg: cyl %d/ sector %d/ head %d;\n\tend: cyl %d/ sector %d/ head %d\n"
+ ,DPCYL(partp->dp_scyl, partp->dp_ssect)
+ ,DPSECT(partp->dp_ssect)
+ ,partp->dp_shd
+ ,DPCYL(partp->dp_ecyl, partp->dp_esect)
+ ,DPSECT(partp->dp_esect)
+ ,partp->dp_ehd);
+}
+
+init_sector0(start)
+{
+struct dos_partition *partp = (struct dos_partition *) (&mboot.parts[3]);
+int size = disksecs - start;
+int rest;
+
+ memcpy(mboot.bootinst, bootcode, sizeof(bootcode));
+ mboot.signature = BOOT_MAGIC;
+
+ partp->dp_typ = DOSPTYP_386BSD;
+ partp->dp_flag = ACTIVE;
+ partp->dp_start = start;
+ partp->dp_size = size;
+
+ dos(partp->dp_start, &partp->dp_scyl, &partp->dp_ssect, &partp->dp_shd);
+ dos(partp->dp_start+partp->dp_size, &partp->dp_ecyl, &partp->dp_esect, &partp->dp_ehd);
+}
+
+change_part(i)
+{
+struct dos_partition *partp = ((struct dos_partition *) &mboot.parts) + i;
+
+ printf("The data for partition %d is:\n", i);
+ print_part(i);
+
+ if (u_flag && ok("Do you want to change it?")) {
+ int tmp;
+
+ if (i_flag) {
+ bzero((char *)partp, sizeof (struct dos_partition));
+ if (i == 3) {
+ init_sector0(1);
+ printf("\nThe static data for the DOS partition 3 has been reinitialized to:\n");
+ print_part(i);
+ }
+ }
+
+ do {
+ Decimal("sysid", partp->dp_typ, tmp);
+ Decimal("start", partp->dp_start, tmp);
+ Decimal("size", partp->dp_size, tmp);
+
+ if (ok("Explicitly specifiy beg/end address ?"))
+ {
+ int tsec,tcyl,thd;
+ tcyl = DPCYL(partp->dp_scyl,partp->dp_ssect);
+ thd = partp->dp_shd;
+ tsec = DPSECT(partp->dp_ssect);
+ Decimal("beginning cylinder", tcyl, tmp);
+ Decimal("beginning head", thd, tmp);
+ Decimal("beginning sector", tsec, tmp);
+ partp->dp_scyl = DOSCYL(tcyl);
+ partp->dp_ssect = DOSSECT(tsec,tcyl);
+ partp->dp_shd = thd;
+
+ tcyl = DPCYL(partp->dp_ecyl,partp->dp_esect);
+ thd = partp->dp_ehd;
+ tsec = DPSECT(partp->dp_esect);
+ Decimal("ending cylinder", tcyl, tmp);
+ Decimal("ending head", thd, tmp);
+ Decimal("ending sector", tsec, tmp);
+ partp->dp_ecyl = DOSCYL(tcyl);
+ partp->dp_esect = DOSSECT(tsec,tcyl);
+ partp->dp_ehd = thd;
+ } else {
+ dos(partp->dp_start,
+ &partp->dp_scyl, &partp->dp_ssect, &partp->dp_shd);
+ dos(partp->dp_start+partp->dp_size - 1,
+ &partp->dp_ecyl, &partp->dp_esect, &partp->dp_ehd);
+ }
+
+ print_part(i);
+ } while (!ok("Are we happy with this entry?"));
+ }
+}
+
+print_params()
+{
+ printf("parameters extracted from in-core disklabel are:\n");
+ printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n"
+ ,cyls,heads,sectors,cylsecs);
+ if((dos_sectors > 63) || (dos_cyls > 1023) || (dos_heads > 255))
+ printf(" Figures below won't work with BIOS for partitions not in cyl 1\n");
+ printf("parameters to be used for BIOS calculations are:\n");
+ printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n"
+ ,dos_cyls,dos_heads,dos_sectors,dos_cylsecs);
+}
+
+change_active(which)
+{
+int i;
+int active = 3, tmp;
+struct dos_partition *partp = ((struct dos_partition *) &mboot.parts);
+
+ if (a_flag && which != -1)
+ active = which;
+ if (ok("Do you want to change the active partition?")) {
+ do
+ Decimal("active partition", active, tmp);
+ while(!ok("Are you happy with this choice"));
+ }
+ for (i = 0; i < NDOSPART; i++)
+ partp[i].dp_flag = 0;
+ partp[active].dp_flag = ACTIVE;
+}
+
+get_params_to_use()
+{
+ int tmp;
+ print_params();
+ if (ok("Do you want to change our idea of what BIOS thinks ?"))
+ {
+ do
+ {
+ Decimal("BIOS's idea of #cylinders", dos_cyls, tmp);
+ Decimal("BIOS's idea of #heads", dos_heads, tmp);
+ Decimal("BIOS's idea of #sectors", dos_sectors, tmp);
+ dos_cylsecs = dos_heads * dos_sectors;
+ print_params();
+ }
+ while(!ok("Are you happy with this choice"));
+ }
+}
+
+/***********************************************\
+* Change real numbers into strange dos numbers *
+\***********************************************/
+static
+dos(sec, c, s, h)
+int sec;
+unsigned char *c, *s, *h;
+{
+int cy;
+int hd;
+
+ cy = sec / ( dos_cylsecs );
+ sec = sec - cy * ( dos_cylsecs );
+
+ hd = sec / dos_sectors;
+ sec = (sec - hd * dos_sectors) + 1;
+
+ *h = hd;
+ *c = cy & 0xff;
+ *s = (sec & 0x3f) | ( (cy & 0x300) >> 2);
+}
+
+int fd;
+
+ /* Getting device status */
+
+open_disk(u_flag)
+{
+struct stat st;
+
+ if (stat(disk, &st) == -1) {
+ fprintf(stderr, "%s: Can't get file status of %s\n",
+ name, disk);
+ return -1;
+ } else if ( !(st.st_mode & S_IFCHR) ) {
+ fprintf(stderr,"%s: Device %s is not character special\n",
+ name, disk);
+ return -1;
+ }
+ if ((fd = open(disk, u_flag?O_RDWR:O_RDONLY)) == -1) {
+ fprintf(stderr,"%s: Can't open device %s\n", name, disk);
+ return -1;
+ }
+ if (get_params(0) == -1) {
+ fprintf(stderr, "%s: Can't get disk parameters on %s\n",
+ name, disk);
+ return -1;
+ }
+ return fd;
+}
+
+
+read_disk(sector, buf)
+{
+ lseek(fd,(sector * 512), 0);
+ return read(fd, buf, 512);
+}
+
+write_disk(sector, buf)
+{
+ lseek(fd,(sector * 512), 0);
+ return write(fd, buf, 512);
+}
+
+get_params(verbose)
+{
+
+ if (ioctl(fd, DIOCGDINFO, &disklabel) == -1) {
+ return -1;
+ }
+
+ dos_cyls = cyls = disklabel.d_ncylinders;
+ dos_heads = heads = disklabel.d_ntracks;
+ dos_sectors = sectors = disklabel.d_nsectors;
+ dos_cylsecs = cylsecs = heads * sectors;
+ disksecs = cyls * heads * sectors;
+
+ return (disksecs);
+}
+
+
+read_s0()
+{
+ if (read_disk(0, (char *) mboot.bootinst) == -1) {
+ fprintf(stderr, "%s: Can't read fdisk partition table\n", name);
+ return -1;
+ }
+ if (mboot.signature != BOOT_MAGIC) {
+ fprintf(stderr, "%s: Invalid fdisk partition table found\n",
+ name);
+ /* So should we initialize things */
+ return -1;
+ }
+ return 0;
+}
+
+write_s0()
+{
+ int flag;
+ if (iotest) {
+ print_s0(-1);
+ return 0;
+ }
+ /*
+ * write enable label sector before write (if necessary),
+ * disable after writing.
+ * needed if the disklabel protected area also protects
+ * sector 0. (e.g. empty disk)
+ */
+ flag = 1;
+ if (ioctl(fd, DIOCWLABEL, &flag) < 0)
+ perror("ioctl DIOCWLABEL");
+ if (write_disk(0, (char *) mboot.bootinst) == -1) {
+ fprintf(stderr, "%s: Can't write fdisk partition table\n",
+ name);
+ return -1;
+ flag = 0;
+ (void) ioctl(fd, DIOCWLABEL, &flag);
+ }
+}
+
+
+
+ok(str)
+char *str;
+{
+ printf("%s [n] ", str);
+ fgets(lbuf, LBUF, stdin);
+ lbuf[strlen(lbuf)-1] = 0;
+
+ if (*lbuf &&
+ (!strcmp(lbuf, "yes") || !strcmp(lbuf, "YES") ||
+ !strcmp(lbuf, "y") || !strcmp(lbuf, "Y")))
+ return 1;
+ else
+ return 0;
+}
+
+decimal(str, num, deflt)
+char *str;
+int *num;
+{
+int acc = 0, c;
+char *cp;
+
+ while (1) {
+ printf("Supply a decimal value for \"%s\" [%d] ", str, deflt);
+ fgets(lbuf, LBUF, stdin);
+ lbuf[strlen(lbuf)-1] = 0;
+
+ if (!*lbuf)
+ return 0;
+
+ cp = lbuf;
+ while ((c = *cp) && (c == ' ' || c == '\t')) cp++;
+ if (!c)
+ return 0;
+ while (c = *cp++) {
+ if (c <= '9' && c >= '0')
+ acc = acc * 10 + c - '0';
+ else
+ break;
+ }
+ if (c == ' ' || c == '\t')
+ while ((c = *cp) && (c == ' ' || c == '\t')) cp++;
+ if (!c) {
+ *num = acc;
+ return 1;
+ } else
+ printf("%s is an invalid decimal number. Try again\n",
+ lbuf);
+ }
+
+}
+
+hex(str, num, deflt)
+char *str;
+int *num;
+{
+int acc = 0, c;
+char *cp;
+
+ while (1) {
+ printf("Supply a hex value for \"%s\" [%x] ", str, deflt);
+ fgets(lbuf, LBUF, stdin);
+ lbuf[strlen(lbuf)-1] = 0;
+
+ if (!*lbuf)
+ return 0;
+
+ cp = lbuf;
+ while ((c = *cp) && (c == ' ' || c == '\t')) cp++;
+ if (!c)
+ return 0;
+ while (c = *cp++) {
+ if (c <= '9' && c >= '0')
+ acc = (acc << 4) + c - '0';
+ else if (c <= 'f' && c >= 'a')
+ acc = (acc << 4) + c - 'a' + 10;
+ else if (c <= 'F' && c >= 'A')
+ acc = (acc << 4) + c - 'A' + 10;
+ else
+ break;
+ }
+ if (c == ' ' || c == '\t')
+ while ((c = *cp) && (c == ' ' || c == '\t')) cp++;
+ if (!c) {
+ *num = acc;
+ return 1;
+ } else
+ printf("%s is an invalid hex number. Try again\n",
+ lbuf);
+ }
+
+}
+
+string(str, ans)
+char *str;
+char **ans;
+{
+int c;
+char *cp = lbuf;
+
+ while (1) {
+ printf("Supply a string value for \"%s\" [%s] ", str, *ans);
+ fgets(lbuf, LBUF, stdin);
+ lbuf[strlen(lbuf)-1] = 0;
+
+ if (!*lbuf)
+ return 0;
+
+ while ((c = *cp) && (c == ' ' || c == '\t')) cp++;
+ if (c == '"') {
+ c = *++cp;
+ *ans = cp;
+ while ((c = *cp) && c != '"') cp++;
+ } else {
+ *ans = cp;
+ while ((c = *cp) && c != ' ' && c != '\t') cp++;
+ }
+
+ if (c)
+ *cp = 0;
+ return 1;
+ }
+}
+
+char *get_type(type)
+int type;
+{
+ int numentries = (sizeof(part_types)/sizeof(struct part_type));
+ int counter = 0;
+ struct part_type *ptr = part_types;
+
+
+ while(counter < numentries)
+ {
+ if(ptr->type == type)
+ {
+ return(ptr->name);
+ }
+ ptr++;
+ counter++;
+ }
+ return("unknown");
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-27 22:58:29 +0000