diff options
Diffstat (limited to 'e2fsprogs/blkid/blkid_getsize.c')
| -rw-r--r-- | e2fsprogs/blkid/blkid_getsize.c | 179 |
1 files changed, 0 insertions, 179 deletions
diff --git a/e2fsprogs/blkid/blkid_getsize.c b/e2fsprogs/blkid/blkid_getsize.c deleted file mode 100644 index 941efa4..0000000 --- a/e2fsprogs/blkid/blkid_getsize.c +++ /dev/null @@ -1,179 +0,0 @@ -/* vi: set sw=4 ts=4: */ -/* - * getsize.c --- get the size of a partition. - * - * Copyright (C) 1995, 1995 Theodore Ts'o. - * - * %Begin-Header% - * This file may be redistributed under the terms of the - * GNU Lesser General Public License. - * %End-Header% - */ - -/* include this before sys/queues.h! */ -#include "blkidP.h" - -#include <stdio.h> -#include <unistd.h> -#ifdef HAVE_ERRNO_H -#include <errno.h> -#endif -#include <fcntl.h> -#ifdef HAVE_SYS_IOCTL_H -#include <sys/ioctl.h> -#endif -#ifdef HAVE_LINUX_FD_H -#include <linux/fd.h> -#endif -#ifdef HAVE_SYS_DISKLABEL_H -#include <sys/disklabel.h> -#include <sys/stat.h> -#endif -#ifdef HAVE_SYS_DISK_H -#ifdef HAVE_SYS_QUEUE_H -#include <sys/queue.h> /* for LIST_HEAD */ -#endif -#include <sys/disk.h> -#endif -#ifdef __linux__ -#include <sys/utsname.h> -#endif - -#if defined(__linux__) && defined(_IO) && !defined(BLKGETSIZE) -#define BLKGETSIZE _IO(0x12,96) /* return device size */ -#endif - -#if defined(__linux__) && defined(_IOR) && !defined(BLKGETSIZE64) -#define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */ -#endif - -#ifdef APPLE_DARWIN -#define BLKGETSIZE DKIOCGETBLOCKCOUNT32 -#endif /* APPLE_DARWIN */ - -static int valid_offset(int fd, blkid_loff_t offset) -{ - char ch; - - if (blkid_llseek(fd, offset, 0) < 0) - return 0; - if (read(fd, &ch, 1) < 1) - return 0; - return 1; -} - -/* - * Returns the number of blocks in a partition - */ -blkid_loff_t blkid_get_dev_size(int fd) -{ - int valid_blkgetsize64 = 1; -#ifdef __linux__ - struct utsname ut; -#endif - unsigned long long size64; - unsigned long size; - blkid_loff_t high, low; -#ifdef FDGETPRM - struct floppy_struct this_floppy; -#endif -#ifdef HAVE_SYS_DISKLABEL_H - int part = -1; - struct disklabel lab; - struct partition *pp; - char ch; - struct stat st; -#endif /* HAVE_SYS_DISKLABEL_H */ - -#ifdef DKIOCGETBLOCKCOUNT /* For Apple Darwin */ - if (ioctl(fd, DKIOCGETBLOCKCOUNT, &size64) >= 0) { - if ((sizeof(blkid_loff_t) < sizeof(unsigned long long)) - && (size64 << 9 > 0xFFFFFFFF)) - return 0; /* EFBIG */ - return (blkid_loff_t) size64 << 9; - } -#endif - -#ifdef BLKGETSIZE64 -#ifdef __linux__ - if ((uname(&ut) == 0) && - ((ut.release[0] == '2') && (ut.release[1] == '.') && - (ut.release[2] < '6') && (ut.release[3] == '.'))) - valid_blkgetsize64 = 0; -#endif - if (valid_blkgetsize64 && - ioctl(fd, BLKGETSIZE64, &size64) >= 0) { - if ((sizeof(blkid_loff_t) < sizeof(unsigned long long)) - && ((size64) > 0xFFFFFFFF)) - return 0; /* EFBIG */ - return size64; - } -#endif - -#ifdef BLKGETSIZE - if (ioctl(fd, BLKGETSIZE, &size) >= 0) - return (blkid_loff_t)size << 9; -#endif - -#ifdef FDGETPRM - if (ioctl(fd, FDGETPRM, &this_floppy) >= 0) - return (blkid_loff_t)this_floppy.size << 9; -#endif -#ifdef HAVE_SYS_DISKLABEL_H -#if 0 - /* - * This should work in theory but I haven't tested it. Anyone - * on a BSD system want to test this for me? In the meantime, - * binary search mechanism should work just fine. - */ - if ((fstat(fd, &st) >= 0) && S_ISBLK(st.st_mode)) - part = st.st_rdev & 7; - if (part >= 0 && (ioctl(fd, DIOCGDINFO, (char *)&lab) >= 0)) { - pp = &lab.d_partitions[part]; - if (pp->p_size) - return pp->p_size << 9; - } -#endif -#endif /* HAVE_SYS_DISKLABEL_H */ - - /* - * OK, we couldn't figure it out by using a specialized ioctl, - * which is generally the best way. So do binary search to - * find the size of the partition. - */ - low = 0; - for (high = 1024; valid_offset(fd, high); high *= 2) - low = high; - while (low < high - 1) - { - const blkid_loff_t mid = (low + high) / 2; - - if (valid_offset(fd, mid)) - low = mid; - else - high = mid; - } - return low + 1; -} - -#ifdef TEST_PROGRAM -int main(int argc, char **argv) -{ - blkid_loff_t bytes; - int fd; - - if (argc < 2) { - fprintf(stderr, "Usage: %s device\n" - "Determine the size of a device\n", argv[0]); - return 1; - } - - if ((fd = open(argv[1], O_RDONLY)) < 0) - perror(argv[0]); - - bytes = blkid_get_dev_size(fd); - printf("Device %s has %lld 1k blocks.\n", argv[1], bytes >> 10); - - return 0; -} -#endif |