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-rw-r--r--fdisk/fdiskbsdlabel.c246
1 files changed, 129 insertions, 117 deletions
diff --git a/fdisk/fdiskbsdlabel.c b/fdisk/fdiskbsdlabel.c
index 60029b919..435541df2 100644
--- a/fdisk/fdiskbsdlabel.c
+++ b/fdisk/fdiskbsdlabel.c
@@ -38,8 +38,8 @@
19990319 - Arnaldo Carvalho de Melo <acme@conectiva.com.br> - i18n/nls
20000101 - David Huggins-Daines <dhuggins@linuxcare.com> - Better
- support for OSF/1 disklabels on Alpha. Also fixed unaligned
- accesses in alpha_bootblock_checksum()
+ support for OSF/1 disklabels on Alpha.
+ Also fixed unaligned accesses in alpha_bootblock_checksum()
*/
#include <unistd.h>
@@ -73,7 +73,8 @@ static int xbsd_get_part_index (int max);
static int xbsd_check_new_partition (int *i);
static void xbsd_list_types (void);
static u_short xbsd_dkcksum (struct xbsd_disklabel *lp);
-static int xbsd_initlabel (struct partition *p, struct xbsd_disklabel *d, int pindex);
+static int xbsd_initlabel (struct partition *p, struct xbsd_disklabel *d,
+ int pindex);
static int xbsd_readlabel (struct partition *p, struct xbsd_disklabel *d);
static int xbsd_writelabel (struct partition *p, struct xbsd_disklabel *d);
static void sync_disks (void);
@@ -101,22 +102,26 @@ static struct xbsd_disklabel xbsd_dlabel;
#define bsd_cround(n) \
(display_in_cyl_units ? ((n)/xbsd_dlabel.d_secpercyl) + 1 : (n))
+/*
+ * Test whether the whole disk has BSD disk label magic.
+ *
+ * Note: often reformatting with DOS-type label leaves the BSD magic,
+ * so this does not mean that there is a BSD disk label.
+ */
int
check_osf_label(void) {
- osf_label = 0;
- if (xbsd_readlabel (NULL, &xbsd_dlabel) == 0)
- return 0;
- osf_label = 1;
- return 1;
+ if (xbsd_readlabel (NULL, &xbsd_dlabel) == 0)
+ return 0;
+ return 1;
}
int
btrydev (char * dev) {
- if (xbsd_readlabel (NULL, &xbsd_dlabel) == 0)
- return -1;
- printf(_("\nBSD label for device: %s\n"), dev);
- xbsd_print_disklabel (0);
- return 0;
+ if (xbsd_readlabel (NULL, &xbsd_dlabel) == 0)
+ return -1;
+ printf(_("\nBSD label for device: %s\n"), dev);
+ xbsd_print_disklabel (0);
+ return 0;
}
static void
@@ -598,152 +603,159 @@ xbsd_get_part_index (int max)
}
static int
-xbsd_check_new_partition (int *i)
-{
- int t;
+xbsd_check_new_partition (int *i) {
- if (xbsd_dlabel.d_npartitions == BSD_MAXPARTITIONS)
- {
- for (t=0; t < BSD_MAXPARTITIONS; t++)
- if (xbsd_dlabel.d_partitions[t].p_size == 0)
- break;
+ /* room for more? various BSD flavours have different maxima */
+ if (xbsd_dlabel.d_npartitions == BSD_MAXPARTITIONS) {
+ int t;
- if (t == BSD_MAXPARTITIONS)
- {
- fprintf (stderr, _("The maximum number of partitions has been created\n"));
- return 0;
- }
- }
- *i = xbsd_get_part_index (BSD_MAXPARTITIONS);
+ for (t = 0; t < BSD_MAXPARTITIONS; t++)
+ if (xbsd_dlabel.d_partitions[t].p_size == 0)
+ break;
- if (*i >= xbsd_dlabel.d_npartitions)
- xbsd_dlabel.d_npartitions = (*i) + 1;
+ if (t == BSD_MAXPARTITIONS) {
+ fprintf (stderr, _("The maximum number of partitions "
+ "has been created\n"));
+ return 0;
+ }
+ }
- if (xbsd_dlabel.d_partitions[*i].p_size != 0)
- {
- fprintf (stderr, _("This partition already exists.\n"));
- return 0;
- }
- return 1;
+ *i = xbsd_get_part_index (BSD_MAXPARTITIONS);
+
+ if (*i >= xbsd_dlabel.d_npartitions)
+ xbsd_dlabel.d_npartitions = (*i) + 1;
+
+ if (xbsd_dlabel.d_partitions[*i].p_size != 0) {
+ fprintf (stderr, _("This partition already exists.\n"));
+ return 0;
+ }
+
+ return 1;
}
static void
-xbsd_list_types (void)
-{
- list_types (xbsd_fstypes);
+xbsd_list_types (void) {
+ list_types (xbsd_fstypes);
}
static u_short
-xbsd_dkcksum (struct xbsd_disklabel *lp)
-{
- register u_short *start, *end;
- register u_short sum = 0;
+xbsd_dkcksum (struct xbsd_disklabel *lp) {
+ u_short *start, *end;
+ u_short sum = 0;
- start = (u_short *)lp;
- end = (u_short *)&lp->d_partitions[lp->d_npartitions];
- while (start < end)
- sum ^= *start++;
- return (sum);
+ start = (u_short *) lp;
+ end = (u_short *) &lp->d_partitions[lp->d_npartitions];
+ while (start < end)
+ sum ^= *start++;
+ return sum;
}
static int
-xbsd_initlabel (struct partition *p, struct xbsd_disklabel *d, int pindex)
-{
- struct xbsd_partition *pp;
- struct geom g;
+xbsd_initlabel (struct partition *p, struct xbsd_disklabel *d, int pindex) {
+ struct xbsd_partition *pp;
+ struct geom g;
- get_geometry (fd, &g);
- bzero (d, sizeof (struct xbsd_disklabel));
+ get_geometry (fd, &g);
+ bzero (d, sizeof (struct xbsd_disklabel));
- d -> d_magic = BSD_DISKMAGIC;
+ d -> d_magic = BSD_DISKMAGIC;
- if (strncmp (disk_device, "/dev/sd", 7) == 0)
- d -> d_type = BSD_DTYPE_SCSI;
- else
- d -> d_type = BSD_DTYPE_ST506;
+ if (strncmp (disk_device, "/dev/sd", 7) == 0)
+ d -> d_type = BSD_DTYPE_SCSI;
+ else
+ d -> d_type = BSD_DTYPE_ST506;
#if 0 /* not used (at least not written to disk) by NetBSD/i386 1.0 */
- d -> d_subtype = BSD_DSTYPE_INDOSPART & pindex;
+ d -> d_subtype = BSD_DSTYPE_INDOSPART & pindex;
#endif
#if !defined (__alpha__)
- d -> d_flags = BSD_D_DOSPART;
+ d -> d_flags = BSD_D_DOSPART;
#else
- d -> d_flags = 0;
+ d -> d_flags = 0;
#endif
- d -> d_secsize = SECTOR_SIZE; /* bytes/sector */
- d -> d_nsectors = g.sectors; /* sectors/track */
- d -> d_ntracks = g.heads; /* tracks/cylinder (heads) */
- d -> d_ncylinders = g.cylinders;
- d -> d_secpercyl = g.sectors * g.heads; /* sectors/cylinder */
- if (d -> d_secpercyl == 0)
- d -> d_secpercyl = 1; /* avoid segfaults */
- d -> d_secperunit = d -> d_secpercyl * d -> d_ncylinders;
-
- d -> d_rpm = 3600;
- d -> d_interleave = 1;
- d -> d_trackskew = 0;
- d -> d_cylskew = 0;
- d -> d_headswitch = 0;
- d -> d_trkseek = 0;
-
- d -> d_magic2 = BSD_DISKMAGIC;
- d -> d_bbsize = BSD_BBSIZE;
- d -> d_sbsize = BSD_SBSIZE;
+ d -> d_secsize = SECTOR_SIZE; /* bytes/sector */
+ d -> d_nsectors = g.sectors; /* sectors/track */
+ d -> d_ntracks = g.heads; /* tracks/cylinder (heads) */
+ d -> d_ncylinders = g.cylinders;
+ d -> d_secpercyl = g.sectors * g.heads;/* sectors/cylinder */
+ if (d -> d_secpercyl == 0)
+ d -> d_secpercyl = 1; /* avoid segfaults */
+ d -> d_secperunit = d -> d_secpercyl * d -> d_ncylinders;
+
+ d -> d_rpm = 3600;
+ d -> d_interleave = 1;
+ d -> d_trackskew = 0;
+ d -> d_cylskew = 0;
+ d -> d_headswitch = 0;
+ d -> d_trkseek = 0;
+
+ d -> d_magic2 = BSD_DISKMAGIC;
+ d -> d_bbsize = BSD_BBSIZE;
+ d -> d_sbsize = BSD_SBSIZE;
#if !defined (__alpha__)
- d -> d_npartitions = 4;
- pp = &d -> d_partitions[2]; /* Partition C should be the NetBSD partition */
- pp -> p_offset = get_start_sect(p);
- pp -> p_size = get_nr_sects(p);
- pp -> p_fstype = BSD_FS_UNUSED;
- pp = &d -> d_partitions[3]; /* Partition D should be the whole disk */
- pp -> p_offset = 0;
- pp -> p_size = d -> d_secperunit;
- pp -> p_fstype = BSD_FS_UNUSED;
+ d -> d_npartitions = 4;
+ pp = &d -> d_partitions[2]; /* Partition C should be
+ the NetBSD partition */
+ pp -> p_offset = get_start_sect(p);
+ pp -> p_size = get_nr_sects(p);
+ pp -> p_fstype = BSD_FS_UNUSED;
+ pp = &d -> d_partitions[3]; /* Partition D should be
+ the whole disk */
+ pp -> p_offset = 0;
+ pp -> p_size = d -> d_secperunit;
+ pp -> p_fstype = BSD_FS_UNUSED;
#elif defined (__alpha__)
- d -> d_npartitions = 3;
- pp = &d -> d_partitions[2]; /* Partition C should be the whole disk */
- pp -> p_offset = 0;
- pp -> p_size = d -> d_secperunit;
- pp -> p_fstype = BSD_FS_UNUSED;
+ d -> d_npartitions = 3;
+ pp = &d -> d_partitions[2]; /* Partition C should be
+ the whole disk */
+ pp -> p_offset = 0;
+ pp -> p_size = d -> d_secperunit;
+ pp -> p_fstype = BSD_FS_UNUSED;
#endif
- return 1;
+ return 1;
}
+/*
+ * Read a xbsd_disklabel from sector 0 or from the starting sector of p.
+ * If it has the right magic, return 1.
+ */
static int
xbsd_readlabel (struct partition *p, struct xbsd_disklabel *d)
{
- int t, sector;
+ int t, sector;
+ /* p is used only to get the starting sector */
#if !defined (__alpha__)
- sector = (p ? get_start_sect(p) : 0);
+ sector = (p ? get_start_sect(p) : 0);
#elif defined (__alpha__)
- sector = 0;
+ sector = 0;
#endif
- if (ext2_llseek (fd, (ext2_loff_t) sector * SECTOR_SIZE, SEEK_SET) == -1)
- fatal (unable_to_seek);
- if (BSD_BBSIZE != read (fd, disklabelbuffer, BSD_BBSIZE))
- fatal (unable_to_read);
+ if (ext2_llseek (fd, (ext2_loff_t) sector * SECTOR_SIZE, SEEK_SET) == -1)
+ fatal (unable_to_seek);
+ if (BSD_BBSIZE != read (fd, disklabelbuffer, BSD_BBSIZE))
+ fatal (unable_to_read);
- bcopy (&disklabelbuffer[BSD_LABELSECTOR * SECTOR_SIZE + BSD_LABELOFFSET],
- d, sizeof (struct xbsd_disklabel));
+ bcopy (&disklabelbuffer[BSD_LABELSECTOR * SECTOR_SIZE + BSD_LABELOFFSET],
+ d, sizeof (struct xbsd_disklabel));
- for (t = d -> d_npartitions; t < BSD_MAXPARTITIONS; t++)
- {
- d -> d_partitions[t].p_size = 0;
- d -> d_partitions[t].p_offset = 0;
- d -> d_partitions[t].p_fstype = BSD_FS_UNUSED;
- }
- if (d -> d_magic != BSD_DISKMAGIC || d -> d_magic2 != BSD_DISKMAGIC)
- return 0;
+ if (d -> d_magic != BSD_DISKMAGIC || d -> d_magic2 != BSD_DISKMAGIC)
+ return 0;
- if (d -> d_npartitions > BSD_MAXPARTITIONS)
- fprintf (stderr, _("Warning: too many partitions (%d, maximum is %d).\n"),
- d -> d_npartitions, BSD_MAXPARTITIONS);
- return 1;
+ for (t = d -> d_npartitions; t < BSD_MAXPARTITIONS; t++) {
+ d -> d_partitions[t].p_size = 0;
+ d -> d_partitions[t].p_offset = 0;
+ d -> d_partitions[t].p_fstype = BSD_FS_UNUSED;
+ }
+
+ if (d -> d_npartitions > BSD_MAXPARTITIONS)
+ fprintf (stderr, _("Warning: too many partitions "
+ "(%d, maximum is %d).\n"),
+ d -> d_npartitions, BSD_MAXPARTITIONS);
+ return 1;
}
static int
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-06-02 15:04:28 +0200