sys/statvfs.h - VFS File System information structure
[XSI] #include <sys/statvfs.h>
The <sys/statvfs.h> header shall define the statvfs structure that includes at least the following members:unsigned long f_bsize File system block size. unsigned long f_frsize Fundamental file system block size. fsblkcnt_t f_blocks Total number of blocks on file system in units of f_frsize. fsblkcnt_t f_bfree Total number of free blocks. fsblkcnt_t f_bavail Number of free blocks available to non-privileged process. fsfilcnt_t f_files Total number of file serial numbers. fsfilcnt_t f_ffree Total number of free file serial numbers. fsfilcnt_t f_favail Number of file serial numbers available to non-privileged process. unsigned long f_fsid File system ID. unsigned long f_flag Bit mask of f_flag values. unsigned long f_namemax Maximum filename length.
The fsblkcnt_t and fsfilcnt_t types shall be defined as described in <sys/types.h>.
The following flags for the f_flag member shall be defined:
- Read-only file system.
- Does not support the semantics of the ST_ISUID and ST_ISGID file mode bits.
The following shall be declared as functions and may also be defined as macros. Function prototypes shall be provided.int statvfs(const char *restrict, struct statvfs *restrict); int fstatvfs(int, struct statvfs *);
<sys/types.h>, the System Interfaces volume of IEEE Std 1003.1-2001, fstatvfs(), statvfs()
First released in Issue 4, Version 2.
The type of f_blocks, f_bfree, and f_bavail is changed from unsigned long to fsblkcnt_t; the type of f_files, f_ffree, and f_favail is changed from unsigned long to fsfilcnt_t.
The Open Group Corrigendum U035/5 is applied. In the DESCRIPTION, the types fsblkcnt_t and fsfilcnt_t have been described.
The restrict keyword is added to the prototype for statvfs().
IEEE Std 1003.1-2001/Cor 1-2002, item XBD/TC1/D6/18 is applied, changing the description of ST_NOSUID from ``Does not support setuid()/ setgid() semantics'' to ``Does not support the semantics of the ST_ISUID and ST_ISGID file mode bits''.