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STATFS(2) FreeBSD System Calls Manual STATFS(2) NAME statfs -- get file system statistics LIBRARY Standard C Library (libc, -lc) SYNOPSIS #include <sys/param.h> #include <sys/mount.h> int statfs(const char *path, struct statfs *buf); int fstatfs(int fd, struct statfs *buf); DESCRIPTION Statfs() returns information about a mounted file system. Path is the path name of any file within the mounted file system. Buf is a pointer to a statfs() structure defined as follows: typedef struct fsid { int32_t val[2]; } fsid_t; /* file system id type */ /* * file system statistics */ #define MFSNAMELEN 16 /* length of fs type name, including null */ #define MNAMELEN 90 /* length of buffer for returned name */ struct statfs { long f_bsize; /* fundamental file system block size */ long f_iosize; /* 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 */ uid_t f_owner; /* user that mounted the file system */ int f_type; /* type of file system */ int f_flags; /* copy of mount flags */ long f_syncwrites; /* count of sync writes since mount */ long f_asyncwrites; /* count of async writes since mount */ char f_fstypename[MFSNAMELEN];/* fs type name */ char f_mntonname[MNAMELEN]; /* mount point */ long f_syncreads; /* count of sync reads since mount */ long f_asyncreads; /* count of async reads since mount */ char f_mntfromname[MNAMELEN]; /* mounted file system */ }; The flags that may be returned include: MNT_RDONLY The file system is mounted read-only; Even the super- user may not write on it. MNT_NOEXEC Files may not be executed from the file system. MNT_NOSUID Setuid and setgid bits on files are not honored when they are executed. MNT_NODEV Special files in the file system may not be opened. MNT_SYNCHRONOUS All I/O to the file system is done synchronously. MNT_ASYNC No file system I/O is done synchronously. MNT_LOCAL The file system resides locally. MNT_QUOTA The file system has quotas enabled on it. MNT_ROOTFS Identifies the root file system. MNT_EXRDONLY The file system is exported read-only. MNT_EXPORTED The file system is exported for both reading and writ- ing. MNT_DEFEXPORTED The file system is exported for both reading and writing to any Internet host. MNT_EXPORTANON The file system maps all remote accesses to the anony- mous user. MNT_EXKERB The file system is exported with Kerberos uid mapping. Fields that are undefined for a particular file system are set to -1. Fstatfs() returns the same information about an open file referenced by descriptor fd. RETURN VALUES Upon successful completion, the value 0 is returned; otherwise the value -1 is returned and the global variable errno is set to indicate the error. ERRORS Statfs() fails if one or more of the following are true: [ENOTDIR] A component of the path prefix of Path is not a direc- tory. [ENAMETOOLONG] The length of a component of path exceeds 255 charac- ters, or the length of path exceeds 1023 characters. [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 translat- ing 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. Fstatfs() fails if one or more of the following are true: [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. HISTORY The statfs() function first appeared in 4.4BSD. FreeBSD 11.1 May 24, 1995 FreeBSD 11.1
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | HISTORY
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