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NAME
statfs, fstatfs - get file system statistics
SYNOPSIS
#include <sys/vfs.h> /* or <sys/statfs.h> */
int statfs(const char *path, struct statfs *buf);
int fstatfs(int fd, struct statfs *buf);
DESCRIPTION
The function statfs() returns information about a mounted file system.
path is the pathname of any file within the mounted filesystem. buf is
a pointer to a statfs structure defined approximately 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 */ //// 总量
long f_bfree; /* free blocks in fs */ /// 余量
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 */
};
File system types:
ADFS_SUPER_MAGIC 0xadf5
AFFS_SUPER_MAGIC 0xADFF
BEFS_SUPER_MAGIC 0x42465331
BFS_MAGIC 0x1BADFACE
CIFS_MAGIC_NUMBER 0xFF534D42
CODA_SUPER_MAGIC 0x73757245
COH_SUPER_MAGIC 0x012FF7B7
CRAMFS_MAGIC 0x28cd3d45
