#include <sys/ioctl.h>
#include <unistd.h>
+#ifdef HAVE_LINUX_FD_H
+#include <linux/fd.h>
+#endif
+
+#ifdef HAVE_SYS_DISKLABEL_H
+#include <sys/disklabel.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
+
#include "blkdev.h"
#include "linux_version.h"
int
blkdev_get_size(int fd, unsigned long long *bytes)
{
- /* TODO: use stat as well */
+#ifdef DKIOCGETBLOCKCOUNT
+ /* Apple Darwin */
+ if (ioctl(fd, DKIOCGETBLOCKCOUNT, bytes) >= 0) {
+ *bytes <<= 9;
+ return 0;
+ }
+#endif
#ifdef BLKGETSIZE64
+ {
#ifdef __linux__
- int ver = get_linux_version();
- /* kernels 2.4.15-2.4.17, had a broken BLKGETSIZE64 */
- if (ver >= KERNEL_VERSION (2,6,0) ||
- (ver >= KERNEL_VERSION (2,4,18) && ver < KERNEL_VERSION (2,5,0)))
+ int ver = get_linux_version();
+
+ /* kernels 2.4.15-2.4.17, had a broken BLKGETSIZE64 */
+ if (ver >= KERNEL_VERSION (2,6,0) ||
+ (ver >= KERNEL_VERSION (2,4,18) && ver < KERNEL_VERSION (2,5,0)))
#endif
- if (ioctl(fd, BLKGETSIZE64, bytes) >= 0)
- return 0;
+ if (ioctl(fd, BLKGETSIZE64, bytes) >= 0)
+ return 0;
+ }
#endif /* BLKGETSIZE64 */
#ifdef BLKGETSIZE
}
}
- return -1;
#endif /* BLKGETSIZE */
+#ifdef DIOCGMEDIASIZE
+ /* FreeBSD */
+ if (ioctl(fd, DIOCGMEDIASIZE, bytes) >= 0)
+ return 0
+#endif
+
+#ifdef FDGETPRM
+ {
+ struct floppy_struct this_floppy;
+
+ if (ioctl(fd, FDGETPRM, &this_floppy) >= 0) {
+ *bytes = this_floppy.size << 9;
+ return 0;
+ }
+ }
+#endif /* FDGETPRM */
+
+#ifdef HAVE_SYS_DISKLABEL_H
+ {
+ /*
+ * This code works for FreeBSD 4.11 i386, except for the full device
+ * (such as /dev/ad0). It doesn't work properly for newer FreeBSD
+ * though. FreeBSD >= 5.0 should be covered by the DIOCGMEDIASIZE
+ * above however.
+ *
+ * Note that FreeBSD >= 4.0 has disk devices as unbuffered (raw,
+ * character) devices, so we need to check for S_ISCHR, too.
+ */
+ int part = -1;
+ struct disklabel lab;
+ struct partition *pp;
+ char ch;
+ struct stat st;
+
+ if ((fstat(fd, &st) >= 0) &&
+ (S_ISBLK(st.st_mode) || S_ISCHR(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) {
+ *bytes = pp->p_size << 9;
+ return 0;
+ }
+ }
+ }
+#endif /* HAVE_SYS_DISKLABEL_H */
+
*bytes = blkdev_find_size(fd);
return 0;
}
* getsize.c --- get the size of a partition.
*
* Copyright (C) 1995, 1995 Theodore Ts'o.
+ * Copyright (C) 2010 Karel Zak <kzak@redhat.com>
*
* %Begin-Header%
* This file may be redistributed under the terms of the
* %End-Header%
*/
-#define _LARGEFILE_SOURCE
-#define _LARGEFILE64_SOURCE
-
-/* include this before sys/queues.h! */
-#include "blkidP.h"
-
#include <stdio.h>
-#if HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-#if 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>
-#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 HAVE_SYS_STAT_H
#include <sys/stat.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 */
+#include <sys/types.h>
-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;
-}
+#include "blkdev.h"
+#include "blkidP.h"
-/*
- * Returns the number of bytes in a partition
+/**
+ * blkid_get_dev_size:
+ * @fd: file descriptor
+ *
+ * Returns: size (in bytes) of the block device or size of the regular file or 0.
*/
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
+ unsigned long long bytes;
-/* tested on FreeBSD 6.1-RELEASE i386 */
-#ifdef DIOCGMEDIASIZE
- if (ioctl(fd, DIOCGMEDIASIZE, &size64) >= 0)
- return (off_t)size64;
-#endif /* DIOCGMEDIASIZE */
+ if (fstat(fd, &st) == 0 && S_ISREG(st.st_mode))
+ return st.st_size;
-#ifdef FDGETPRM
- if (ioctl(fd, FDGETPRM, &this_floppy) >= 0)
- return (blkid_loff_t)this_floppy.size << 9;
-#endif
-#ifdef HAVE_SYS_DISKLABEL_H
- /*
- * This code works for FreeBSD 4.11 i386, except for the full device
- * (such as /dev/ad0). It doesn't work properly for newer FreeBSD
- * though. FreeBSD >= 5.0 should be covered by the DIOCGMEDIASIZE
- * above however.
- *
- * Note that FreeBSD >= 4.0 has disk devices as unbuffered (raw,
- * character) devices, so we need to check for S_ISCHR, too.
- */
- if ((fstat(fd, &st) >= 0) && (S_ISBLK(st.st_mode) || S_ISCHR(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 /* HAVE_SYS_DISKLABEL_H */
- {
-#ifdef HAVE_FSTAT64
- struct stat64 st;
- if (fstat64(fd, &st) == 0)
-#else
- struct stat st;
- if (fstat(fd, &st) == 0)
-#endif
- if (S_ISREG(st.st_mode))
- return st.st_size;
- }
-
-
- /*
- * 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 (blkdev_get_size(fd, &bytes))
+ return 0;
- if (valid_offset(fd, mid))
- low = mid;
- else
- high = mid;
- }
- return low + 1;
+ return bytes;
}
-#ifdef TEST_PROGRAM
-int main(int argc, char **argv)
-{
- long long 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 %Ld 1k blocks.\n", argv[1],
- (unsigned long long) bytes >> 10);
-
- return 0;
-}
-#endif
pr->mode = sb.st_mode;
- if (S_ISBLK(sb.st_mode))
- blkdev_get_size(fd, (unsigned long long *) &pr->size);
- else if (S_ISCHR(sb.st_mode))
+ if (S_ISBLK(sb.st_mode)) {
+ if (blkdev_get_size(fd, (unsigned long long *) &pr->size)) {
+ DBG(DEBUG_LOWPROBE, printf(
+ "failed to get device size\n"));
+ goto err;
+ }
+ } else if (S_ISCHR(sb.st_mode))
pr->size = 1; /* UBI devices are char... */
else if (S_ISREG(sb.st_mode))
pr->size = sb.st_size; /* regular file */
* blkid_probe_get_size:
* @pr: probe
*
- * Returns: block device (or file) size in bytes or -1 in case of error.
+ * This function returns size of probing area as defined by blkid_probe_set_device().
+ * If the size of the probing area is unrestricted then this function returns
+ * the real size of device. See also blkid_get_dev_size().
+ *
+ * Returns: size in bytes or -1 in case of error.
*/
blkid_loff_t blkid_probe_get_size(blkid_probe pr)
{
projects / thirdparty / util-linux.git / commitdiff
