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getfsstat(2) [bsd man page]

GETFSSTAT(2)							System Calls Manual						      GETFSSTAT(2)

NAME
getfsstat - get list of all mounted filesystems SYNOPSIS
#include <sys/param.h> #include <sys/mount.h> int getfsstat(buf,bufsize,flags) struct statfs *buf; int bufsize; int flags; DESCRIPTION
Getfsstat() returns information about all mounted filesystems. Buf is a pointer to statfs structures defined as follows: #define MNAMELEN 90 /* length of buffer for returned name */ struct statfs { short f_type; /* type of filesystem (see below) */ short f_flags; /* copy of mount flags */ short f_bsize; /* fundamental file system block size */ short f_iosize; /* optimal transfer block size */ long f_blocks; /* total data blocks in file system */ long f_bfree; /* free blocks in fs */ long f_bavail; /* free blocks avail to non-superuser */ ino_t f_files; /* total file nodes in file system */ ino_t f_ffree; /* free file nodes in fs */ u_long f_fsid[2]; /* file system id */ long f_spare[4]; /* spare for later */ char f_mntonname[MNAMELEN]; /* mount point */ char f_mntfromname[MNAMELEN]; /* mounted filesystem */ }; /* * File system types. - Only UFS is supported so the other types are not * given. */ #define MOUNT_NONE 0 #define MOUNT_UFS 1 /* Fast Filesystem */ Fields that are undefined for a particular filesystem are set to -1. The buffer is filled with an array of fsstat structures, one for each mounted filesystem up to the size specified by bufsize. If buf is given as NULL, getfsstat() returns just the number of mounted filesystems. Normally flags is currently unused. In 4.4BSD systems the usage is specified as MNT_WAIT. If flags is set to MNT_NOWAIT, getfsstat() will return the information it has available without requesting an update from each filesystem. Thus, some of the information will be out of date, but getfsstat() will not block waiting for information from a filesystem that is unable to respond. RETURN VALUES
Upon successful completion, the number of fsstat structures is returned. Otherwise, -1 is returned and the global variable errno is set to indicate the error. ERRORS
Getfsstat() fails if one or more of the following are true: [EFAULT] Buf points to an invalid address. [EIO] An I/O error occurred while reading from or writing to the filesystem. SEE ALSO
statfs(2), fstab(5), mount(8) HISTORY
The getfsstat function first appeared in 4.4BSD. 4.4 Berkeley Distribution December 24, 1995 GETFSSTAT(2)

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getfsstat(2)							System Calls Manual						      getfsstat(2)

NAME
getfsstat - Gets list of all mounted file systems SYNOPSIS
#include <sys/types.h> #include <sys/mount.h> getfsstat( struct statfs buf[], long bufsize, int flags ); PARAMETERS
An array of statfs structures. Specifies the size in bytes of the buf parameter. Specifies one of the following flags: Wait for an update from each file system before returning information. Information is returned without requesting an update from each file system. Thus, some of the information will be out of date, but the getfsstat() function will not block waiting for information from a file system that is unable to respond. DESCRIPTION
The getfsstat() function returns information about all mounted file systems. Upon successful completion, the buffer pointed to by the buf parameter is filled with an array of statfs structures, one for each mounted file system up to the size specified by the bufsize parameter. If the buf parameter is given as 0 (zero), the getfsstat() function returns just the number of mounted file systems. RETURN VALUE
Upon successful completion, the number of statfs structures is returned. Otherwise, -1 is returned and errno is set to indicate the error. ERRORS
If the getfsstat() function fails, errno may be set to one of the following values: The buf parameter points to an invalid address. An I/O error occurred while reading from or writing to the file system. [Tru64 UNIX] The structure pointed to by the buf parameter cannot cor- rectly represent the value to be returned. This error can occur in applications compiled on DIGITAL UNIX systems, on Tru64 UNIX systems earlier than Version 5.0, or on any system while using the __V40_OBJ_COMPAT compiler macro. These applications use a <statfs> structure not compatible with Tru64 UNIX Version 5.0 for the following fields: f_blocks, f_bfree, f_bavail, f_mntonname, f_mntfromname. RELATED INFORMATION
Functions: statfs(2) Commands: mount(8) delim off getfsstat(2)

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