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32 .\" @(#)getfsstat.2 8.3 (Berkeley) 5/25/95
33 .\" $FreeBSD: src/lib/libc/sys/getfsstat.2,v 1.7.2.4 2001/12/14 18:34:00 ru Exp $
34 .\" $DragonFly: src/lib/libc/sys/getfsstat.2,v 1.5 2008/06/01 20:46:45 dillon Exp $
42 .Nd get list of all mounted filesystems
50 .Fn getfsstat "struct statfs *buf" "long bufsize" "int flags"
51 .Fn getvfsstat "struct statfs *buf" "struct statvfs *vbuf" "long vbufsize" "int flags"
54 returns information about all mounted filesystems.
58 structures defined as follows:
60 typedef struct fsid { int32_t val[2]; } fsid_t; /* file system id type */
63 * file system statistics
66 #define MFSNAMELEN 16 /* length of fs type name, including null */
67 #define MNAMELEN 90 /* length of buffer for returned name */
70 long f_spare2; /* placeholder */
71 long f_bsize; /* fundamental file system block size */
72 long f_iosize; /* optimal transfer block size */
73 long f_blocks; /* total data blocks in file system */
74 long f_bfree; /* free blocks in fs */
75 long f_bavail; /* free blocks avail to non-superuser */
76 long f_files; /* total file nodes in file system */
77 long f_ffree; /* free file nodes in fs */
78 fsid_t f_fsid; /* file system id */
79 uid_t f_owner; /* user that mounted the filesystem */
80 int f_type; /* type of filesystem (see below) */
81 int f_flags; /* copy of mount flags */
82 long f_spare[2]; /* spare for later */
83 char f_fstypename[MFSNAMELEN];/* fs type name */
84 char f_mntonname[MNAMELEN];/* directory on which mounted */
85 char f_mntfromname[MNAMELEN];/* mounted filesystem */
89 The flags that may be returned include:
90 .Bl -tag -width ".Dv MNT_SYNCHRONOUS"
92 The filesystem is mounted read-only;
93 Even the super-user may not write on it.
95 Files may not be executed from the filesystem.
97 Setuid and setgid bits on files are not honored when they are executed.
99 Special files in the filesystem may not be opened.
100 .It Dv MNT_SYNCHRONOUS
101 All I/O to the filesystem is done synchronously.
103 No filesystem I/O is done synchronously.
105 The filesystem resides locally.
107 The filesystem has quotas enabled on it.
109 Identifies the root filesystem.
111 The filesystem is exported read-only.
113 The filesystem is exported for both reading and writing.
114 .It Dv MNT_DEFEXPORTED
115 The filesystem is exported for both reading and writing to any Internet host.
116 .It Dv MNT_EXPORTANON
117 The filesystem maps all remote accesses to the anonymous user.
119 The filesystem is exported with Kerberos uid mapping.
122 Fields that are undefined for a particular filesystem are set to -1.
123 The buffer is filled with an array of
125 structures, one for each mounted filesystem
126 up to the size specified by
133 returns just the number of mounted filesystems.
137 should be specified as
144 will return the information it has available without requesting
145 an update from each filesystem.
146 Thus, some of the information will be out of date, but
148 will not block waiting for information from a filesystem that is
151 returns extended information about all mounted filesystems.
154 represents the size of
158 is expected to be of contemporary size for its own structures.
160 Upon successful completion, the number of
162 structures is returned.
163 Otherwise, -1 is returned and the global variable
165 is set to indicate the error.
170 fail if one or more of the following are true:
174 points to an invalid address.
178 error occurred while reading from or writing to the filesystem.
187 function first appeared in