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28 .\" @(#)getfsstat.2 8.3 (Berkeley) 5/25/95
36 .Nd get list of all mounted file systems
44 .Fn getfsstat "struct statfs *buf" "long bufsize" "int mode"
49 returns information about all mounted file systems.
55 structures, as described in
58 Fields that are undefined for a particular file system are set to -1.
59 The buffer is filled with an array of
61 structures, one for each mounted file system
62 up to the byte count specified by
66 argument is the number of bytes that
68 can hold, not the count of statfs structures it will hold.
74 returns just the number of mounted file systems.
78 should be specified as
85 will return the information it has available without requesting
86 an update from each file system.
87 Thus, some of the information will be out of date, but
89 will not block waiting for information from a file system that is
91 It will also skip any file system that is in the process of being
92 unmounted, even if the unmount would eventually fail.
94 Upon successful completion, the number of
96 structures is returned.
97 Otherwise, -1 is returned and the global variable
99 is set to indicate the error.
104 fails if one or more of the following are true:
110 points to an invalid address.
113 is set to a value other than
120 error occurred while reading from or writing to the file system.
122 Corrupted data was detected while reading from the file system.
131 system call first appeared in