diff options
Diffstat (limited to 'util-linux/fdisk.c')
| -rw-r--r-- | util-linux/fdisk.c | 96 |
1 files changed, 86 insertions, 10 deletions
diff --git a/util-linux/fdisk.c b/util-linux/fdisk.c index 4fecbbb89..a8e1ac857 100644 --- a/util-linux/fdisk.c +++ b/util-linux/fdisk.c @@ -88,12 +88,14 @@ #define cround(n) (display_in_cyl_units ? ((n)/units_per_sector)+1 : (n)) #define scround(x) (((x)+units_per_sector-1)/units_per_sector) -#if defined(__GNUC__) || defined(HAS_LONG_LONG) -typedef long long ext2_loff_t; + +#if defined(CONFIG_LFS) || defined(FDISK_SUPPORT_LARGE_DISKS) || defined(__alpha__) || defined(__ia64__) || defined(__s390x__) +typedef long long fdisk_loff_t; #else -typedef long ext2_loff_t; +typedef long fdisk_loff_t; #endif + /* including <linux/hdreg.h> also fails */ struct hd_geometry { unsigned char heads; @@ -840,6 +842,80 @@ typedef struct { #define SUN_SSWAP32(x) (sun_other_endian ? __swap32(x) \ : (uint32_t)(x)) +#if defined(FDISK_SUPPORT_LARGE_DISKS) +/* + * llseek.c -- stub calling the llseek system call + * + * Copyright (C) 1994 Remy Card. This file may be redistributed + * under the terms of the GNU Public License. + */ + + +#include <syscall.h> + + +#if defined(__alpha__) || defined(__ia64__) || defined(__s390x__) + +#define my_llseek lseek + +#else + +static int _llseek (unsigned int, unsigned long, + unsigned long, fdisk_loff_t *, unsigned int); + +static _syscall5(int,_llseek,unsigned int,f_d,unsigned long,offset_high, + unsigned long, offset_low,fdisk_loff_t *,result, + unsigned int, origin) + +static fdisk_loff_t my_llseek (unsigned int f_d, fdisk_loff_t offset, + unsigned int origin) +{ + fdisk_loff_t result; + int retval; + + retval = _llseek (f_d, ((unsigned long long) offset) >> 32, + ((unsigned long long) offset) & 0xffffffff, + &result, origin); + return (retval == -1 ? (fdisk_loff_t) retval : result); +} + +#endif /* __alpha__ */ + + +static fdisk_loff_t fdisk_llseek (unsigned int f_d, fdisk_loff_t offset, + unsigned int origin) +{ + fdisk_loff_t result; + static int do_compat = 0; + + if (!do_compat) { + result = my_llseek (f_d, offset, origin); + if (!(result == -1 && errno == ENOSYS)) + return result; + + /* + * Just in case this code runs on top of an old kernel + * which does not support the llseek system call + */ + do_compat = 1; + /* + * Now try ordinary lseek. + */ + } + + if ((sizeof(off_t) >= sizeof(fdisk_loff_t)) || + (offset < ((fdisk_loff_t) 1 << ((sizeof(off_t)*8) -1)))) + return lseek(f_d, (off_t) offset, origin); + + errno = EINVAL; + return -1; +} +#else +# define fdisk_llseek lseek +#endif /* FDISK_SUPPORT_LARGE_DISKS */ + + + #ifdef CONFIG_FEATURE_OSF_LABEL /* Changes: @@ -1365,7 +1441,7 @@ xbsd_write_bootstrap (void) sector = get_start_sect(xbsd_part); #endif - if (lseek (fd, (ext2_loff_t) sector * SECTOR_SIZE, SEEK_SET) == -1) + if (fdisk_llseek (fd, (fdisk_loff_t) sector * SECTOR_SIZE, SEEK_SET) == -1) fdisk_fatal (unable_to_seek); if (BSD_BBSIZE != write (fd, disklabelbuffer, BSD_BBSIZE)) fdisk_fatal (unable_to_write); @@ -1533,7 +1609,7 @@ xbsd_readlabel (struct partition *p, struct xbsd_disklabel *d) sector = 0; #endif - if (lseek (fd, (ext2_loff_t) sector * SECTOR_SIZE, SEEK_SET) == -1) + if (fdisk_llseek (fd, (fdisk_loff_t) sector * SECTOR_SIZE, SEEK_SET) == -1) fdisk_fatal (unable_to_seek); if (BSD_BBSIZE != read (fd, disklabelbuffer, BSD_BBSIZE)) fdisk_fatal (unable_to_read); @@ -1579,12 +1655,12 @@ xbsd_writelabel (struct partition *p, struct xbsd_disklabel *d) #if defined (__alpha__) && BSD_LABELSECTOR == 0 alpha_bootblock_checksum (disklabelbuffer); - if (lseek (fd, (ext2_loff_t) 0, SEEK_SET) == -1) + if (fdisk_llseek (fd, (fdisk_loff_t) 0, SEEK_SET) == -1) fdisk_fatal (unable_to_seek); if (BSD_BBSIZE != write (fd, disklabelbuffer, BSD_BBSIZE)) fdisk_fatal (unable_to_write); #else - if (lseek (fd, (ext2_loff_t) sector * SECTOR_SIZE + BSD_LABELOFFSET, + if (fdisk_llseek (fd, (fdisk_loff_t) sector * SECTOR_SIZE + BSD_LABELOFFSET, SEEK_SET) == -1) fdisk_fatal (unable_to_seek); if (sizeof (struct xbsd_disklabel) != write (fd, d, sizeof (struct xbsd_disklabel))) @@ -2007,7 +2083,7 @@ sgi_write_table(void) { */ sgiinfo *info = fill_sgiinfo(); int infostartblock = SGI_SSWAP32(sgilabel->directory[0].vol_file_start); - if (lseek(fd, (long long)infostartblock* + if (fdisk_llseek(fd, (long long)infostartblock* SECTOR_SIZE, SEEK_SET) < 0) fdisk_fatal(unable_to_seek); if (write(fd, info, SECTOR_SIZE) != SECTOR_SIZE) @@ -3390,8 +3466,8 @@ static void fdisk_fatal(enum failure why) { static void seek_sector(uint secno) { - ext2_loff_t offset = (ext2_loff_t) secno * sector_size; - if (lseek(fd, offset, SEEK_SET) == (ext2_loff_t) -1) + fdisk_loff_t offset = (fdisk_loff_t) secno * sector_size; + if (fdisk_llseek(fd, offset, SEEK_SET) == (fdisk_loff_t) -1) fdisk_fatal(unable_to_seek); } |