add a tiny version of libblkid

[project/ubox.git] / libblkid-tiny / blkdev.h

diff --git a/libblkid-tiny/blkdev.h b/libblkid-tiny/blkdev.h
new file mode 100644 (file)
index 0000000..6b18879
--- /dev/null
+++ b/libblkid-tiny/blkdev.h
@@ -0,0 +1,113 @@
+#ifndef BLKDEV_H
+#define BLKDEV_H
+
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#ifdef HAVE_SYS_IOCCOM_H
+# include <sys/ioccom.h> /* for _IO macro on e.g. Solaris */
+#endif
+#include <fcntl.h>
+#include <unistd.h>
+
+#ifdef HAVE_SYS_MKDEV_H
+# include <sys/mkdev.h>                /* major and minor on Solaris */
+#endif
+
+#define DEFAULT_SECTOR_SIZE       512
+
+#ifdef __linux__
+/* very basic ioclts, should be available everywhere */
+# ifndef BLKROSET
+#  define BLKROSET   _IO(0x12,93)      /* set device read-only (0 = read-write) */
+#  define BLKROGET   _IO(0x12,94)      /* get read-only status (0 = read_write) */
+#  define BLKRRPART  _IO(0x12,95)      /* re-read partition table */
+#  define BLKGETSIZE _IO(0x12,96)      /* return device size /512 (long *arg) */
+#  define BLKFLSBUF  _IO(0x12,97)      /* flush buffer cache */
+#  define BLKRASET   _IO(0x12,98)      /* set read ahead for block device */
+#  define BLKRAGET   _IO(0x12,99)      /* get current read ahead setting */
+#  define BLKFRASET  _IO(0x12,100)     /* set filesystem (mm/filemap.c) read-ahead */
+#  define BLKFRAGET  _IO(0x12,101)     /* get filesystem (mm/filemap.c) read-ahead */
+#  define BLKSECTSET _IO(0x12,102)     /* set max sectors per request (ll_rw_blk.c) */
+#  define BLKSECTGET _IO(0x12,103)     /* get max sectors per request (ll_rw_blk.c) */
+#  define BLKSSZGET  _IO(0x12,104)     /* get block device sector size */
+
+/* ioctls introduced in 2.2.16, removed in 2.5.58 */
+#  define BLKELVGET  _IOR(0x12,106,size_t) /* elevator get */
+#  define BLKELVSET  _IOW(0x12,107,size_t) /* elevator set */
+
+#  define BLKBSZGET  _IOR(0x12,112,size_t)
+#  define BLKBSZSET  _IOW(0x12,113,size_t)
+# endif /* !BLKROSET */
+
+# ifndef BLKGETSIZE64
+#  define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */
+# endif
+
+/* block device topology ioctls, introduced in 2.6.32 (commit ac481c20) */
+# ifndef BLKIOMIN
+#  define BLKIOMIN   _IO(0x12,120)
+#  define BLKIOOPT   _IO(0x12,121)
+#  define BLKALIGNOFF _IO(0x12,122)
+#  define BLKPBSZGET _IO(0x12,123)
+# endif
+
+/* discard zeroes support, introduced in 2.6.33 (commit 98262f27) */
+# ifndef BLKDISCARDZEROES
+#  define BLKDISCARDZEROES _IO(0x12,124)
+# endif
+
+/* filesystem freeze, introduced in 2.6.29 (commit fcccf502) */
+# ifndef FIFREEZE
+#  define FIFREEZE   _IOWR('X', 119, int)    /* Freeze */
+#  define FITHAW     _IOWR('X', 120, int)    /* Thaw */
+# endif
+
+#endif /* __linux */
+
+#ifdef APPLE_DARWIN
+# define BLKGETSIZE DKIOCGETBLOCKCOUNT32
+#endif
+
+#ifndef HDIO_GETGEO
+# ifdef __linux__
+#  define HDIO_GETGEO 0x0301
+# endif
+
+/* uniform CD-ROM information */
+#ifndef CDROM_GET_CAPABILITY
+# define CDROM_GET_CAPABILITY 0x5331
+#endif
+
+struct hd_geometry {
+       unsigned char heads;
+       unsigned char sectors;
+       unsigned short cylinders;       /* truncated */
+       unsigned long start;
+};
+#endif
+
+/* are we working with block device? */
+int is_blkdev(int fd);
+
+/* Determine size in bytes */
+off_t blkdev_find_size (int fd);
+
+/* get size in bytes */
+int blkdev_get_size(int fd, unsigned long long *bytes);
+
+/* get 512-byte sector count */
+int blkdev_get_sectors(int fd, unsigned long long *sectors);
+
+/* get hardware sector size */
+int blkdev_get_sector_size(int fd, int *sector_size);
+
+/* specifies whether or not the device is misaligned */
+int blkdev_is_misaligned(int fd);
+
+/* get physical block device size */
+int blkdev_get_physector_size(int fd, int *sector_size);
+
+/* is the device cdrom capable? */
+int blkdev_is_cdrom(int fd);
+
+#endif /* BLKDEV_H */