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!!NAME statfs, fstatfs - get file system statistics !!SYNOPSIS __#include <sys/vfs.h>__ __int statfs(const char *__''path''__, struct statfs *__''buf''__);__ __int fstatfs(int__ ''fd''__, struct statfs *__''buf''__);__ !!DESCRIPTION statfs(2) returns information about a mounted file system. ''path'' is the path name of any file within the mounted filesystem. ''buf'' is a pointer to a ''statfs'' structure defined as follows: struct statfs { long f_type; /* type of filesystem (see below) */ long f_bsize; /* optimal transfer block size */ long f_blocks; /* total data blocks in file system */ long f_bfree; /* free blocks in fs */ long f_bavail; /* free blocks avail to non-superuser */ long f_files; /* total file nodes in file system */ long f_ffree; /* free file nodes in fs */ fsid_t f_fsid; /* file system id */ long f_namelen; /* maximum length of filenames */ long f_spare[[6]; /* spare for later */ }; File system types: linux/affs_fs.h: AFFS_SUPER_MAGIC 0xADFF linux/efs_fs.h: EFS_SUPER_MAGIC 0x00414A53 linux/ext_fs.h: EXT_SUPER_MAGIC 0x137D linux/ext2_fs.h: EXT2_OLD_SUPER_MAGIC 0xEF51 EXT2_SUPER_MAGIC 0xEF53 linux/hpfs_fs.h: HPFS_SUPER_MAGIC 0xF995E849 linux/iso_fs.h: ISOFS_SUPER_MAGIC 0x9660 linux/minix_fs.h: MINIX_SUPER_MAGIC 0x137F /* orig. minix */ MINIX_SUPER_MAGIC2 0x138F /* 30 char minix */ MINIX2_SUPER_MAGIC 0x2468 /* minix V2 */ MINIX2_SUPER_MAGIC2 0x2478 /* minix V2, 30 char names */ linux/msdos_fs.h: MSDOS_SUPER_MAGIC 0x4d44 linux/ncp_fs.h: NCP_SUPER_MAGIC 0x564c linux/nfs_fs.h: NFS_SUPER_MAGIC 0x6969 linux/proc_fs.h: PROC_SUPER_MAGIC 0x9fa0 linux/smb_fs.h: SMB_SUPER_MAGIC 0x517B linux/sysv_fs.h: XENIX_SUPER_MAGIC 0x012FF7B4 SYSV4_SUPER_MAGIC 0x012FF7B5 SYSV2_SUPER_MAGIC 0x012FF7B6 COH_SUPER_MAGIC 0x012FF7B7 linux/ufs_fs.h: UFS_MAGIC 0x00011954 linux/xfs_fs.h: XFS_SUPER_MAGIC 0x58465342 linux/xia_fs.h: _XIAFS_SUPER_MAGIC 0x012FD16D Fields that are undefined for a particular file system are set to 0. fstatfs(2) returns the same information about an open file referenced by descriptor ''fd''. !!RETURN VALUE On success, zero is returned. On error, -1 is returned, and ''errno'' is set appropriately. !!ERRORS For statfs(2): ;[ENOTDIR]: A component of the path prefix of ''path'' is not a directory. ;[ENAMETOOLONG]: ''path'' is too long. ;[ENOENT]: The file referred to by ''path'' does not exist. ;[EACCES]: Search permission is denied for a component of the path prefix of ''path''. ;[ELOOP]: Too many symbolic links were encountered in translating ''path''. ;[EFAULT]: ''Buf'' or ''path'' points to an invalid address. ;[EIO]: An I/O error occurred while reading from or writing to the file system. ;[ENOMEM]: Insufficient kernel memory was available. ;[ENOSYS]: The filesystem ''path'' is on does not support statfs(2). For fstatfs(2): ;[EBADF]: ''fd'' is not a valid open file descriptor. ;[EFAULT]: ''buf'' points to an invalid address. ;[EIO]: An I/O error occurred while reading from or writing to the file system. ;[ENOSYS]: The filesystem ''fd'' is open on does not support statfs(2). !!CONFORMING TO The Linux statfs(2) was inspired by the 4.4BSD one (but they do not use the same structure). !!SEE ALSO stat(2), fstat(2), statfs(2)
4 pages link to
fstatfs(2)
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Man2f
syscalls(2)
lstat(2)
fstat(2)
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