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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 $
41 .Nd get list of all mounted filesystems
43 .Nd get extended list of all mounted filesystems
51 .Fn getfsstat "struct statfs *buf" "long bufsize" "int flags"
52 .Fn getvfsstat "struct statfs *buf" "struct statvfs *vbuf" "long vbufsize" "int flags"
55 returns information about all mounted filesystems.
59 structures defined as follows:
61 typedef struct fsid { int32_t val[2]; } fsid_t; /* file system id type */
64 * file system statistics
67 #define MFSNAMELEN 16 /* length of fs type name, including null */
68 #define MNAMELEN 90 /* length of buffer for returned name */
71 long f_spare2; /* placeholder */
72 long f_bsize; /* fundamental file system block size */
73 long f_iosize; /* optimal transfer block size */
74 long f_blocks; /* total data blocks in file system */
75 long f_bfree; /* free blocks in fs */
76 long f_bavail; /* free blocks avail to non-superuser */
77 long f_files; /* total file nodes in file system */
78 long f_ffree; /* free file nodes in fs */
79 fsid_t f_fsid; /* file system id */
80 uid_t f_owner; /* user that mounted the filesystem */
81 int f_type; /* type of filesystem (see below) */
82 int f_flags; /* copy of mount flags */
83 long f_spare[2]; /* spare for later */
84 char f_fstypename[MFSNAMELEN];/* fs type name */
85 char f_mntonname[MNAMELEN];/* directory on which mounted */
86 char f_mntfromname[MNAMELEN];/* mounted filesystem */
90 The flags that may be returned include:
91 .Bl -tag -width ".Dv MNT_SYNCHRONOUS"
93 The filesystem is mounted read-only;
94 Even the super-user may not write on it.
96 Files may not be executed from the filesystem.
98 Setuid and setgid bits on files are not honored when they are executed.
100 Special files in the filesystem may not be opened.
101 .It Dv MNT_SYNCHRONOUS
102 All I/O to the filesystem is done synchronously.
104 No filesystem I/O is done synchronously.
106 The filesystem resides locally.
108 The filesystem has quotas enabled on it.
110 Identifies the root filesystem.
112 The filesystem is exported read-only.
114 The filesystem is exported for both reading and writing.
115 .It Dv MNT_DEFEXPORTED
116 The filesystem is exported for both reading and writing to any Internet host.
117 .It Dv MNT_EXPORTANON
118 The filesystem maps all remote accesses to the anonymous user.
120 The filesystem is exported with Kerberos uid mapping.
123 Fields that are undefined for a particular filesystem are set to -1.
124 The buffer is filled with an array of
126 structures, one for each mounted filesystem
127 up to the size specified by
134 returns just the number of mounted filesystems.
138 should be specified as
145 will return the information it has available without requesting
146 an update from each filesystem.
147 Thus, some of the information will be out of date, but
149 will not block waiting for information from a filesystem that is
152 returns extended information about all mounted filesystems.
155 represents the size of
159 is expected to be of contemporary size for its own structures.
161 Upon successful completion, the number of
163 structures is returned.
164 Otherwise, -1 is returned and the global variable
166 is set to indicate the error.
171 fail if one or more of the following are true:
175 points to an invalid address.
179 error occurred while reading from or writing to the filesystem.
188 function first appeared in