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28 .\" @(#)getfsstat.2 8.3 (Berkeley) 5/25/95
35 .Nd get list of all mounted file systems
43 .Fn getfsstat "struct statfs *buf" "long bufsize" "int mode"
48 returns information about all mounted file systems.
54 structures, as described in
57 Fields that are undefined for a particular file system are set to -1.
58 The buffer is filled with an array of
60 structures, one for each mounted file system
61 up to the byte count specified by
65 argument is the number of bytes that
67 can hold, not the count of statfs structures it will hold.
73 returns just the number of mounted file systems.
77 should be specified as
84 will return the information it has available without requesting
85 an update from each file system.
86 Thus, some of the information will be out of date, but
88 will not block waiting for information from a file system that is
90 It will also skip any file system that is in the process of being
91 unmounted, even if the unmount would eventually fail.
93 Upon successful completion, the number of
95 structures is returned.
96 Otherwise, -1 is returned and the global variable
98 is set to indicate the error.
103 fails if one or more of the following are true:
109 points to an invalid address.
112 is set to a value other than
119 error occurred while reading from or writing to the file system.
121 Corrupted data was detected while reading from the file system.
130 system call first appeared in