NAME | SYNOPSIS | API RESTRICTIONS | FEATURES | DESCRIPTION | RETURN VALUES | ERRORS | ATTRIBUTES | SEE ALSO | RETURN VALUES | ERRORS | SEE ALSO
#include <sys/param.h> #include <sys/ucred.h> #include <sys/mount.h>int getfsstat(struct statfs *buf, long bufsize, int flags);
The function or functions documented here may not be used safely in all application contexts with all APIs provided in the ChorusOS 5.0 product.
See API(5FEA) for details.
MSDOSFS, NFS_CLIENT, UFS
The getfsstat function returns information about all mounted filesystems. The buf parameter is a pointer to statfs structures defined as follows:
typedef quad fsid_t; #define MNAMELEN 90 /* length of buffer for returned name */ /* final '\0' is always provided */ struct statfs { short f_type; /* type of filesystem (see below) */ short f_flags; /* copy of mount flags */ long f_bsize; /* fundamental filesystem block size */ long f_iosize; /* optimal transfer block size */ long f_blocks; /* total data blocks in filesystem */ long f_bfree; /* free blocks in fs */ long f_bavail; /* free blocks available to non-superuser */ long f_files; /* total file nodes in filesystem */ long f_ffree; /* free file nodes in fs */ fsid_t f_fsid; /* filesystem id */ long f_spare[6]; /* spare for later */ char f_mntonname[MNAMELEN]; /* directory on which mounted */ char f_mntfromname[MNAMELEN]; /* mounted filesystem */ }; /* * File system types. */ #define MOUNT_UFS 1 #define MOUNT_NFS 2 #define MOUNT_MSDOS 4 /* MS/DOS 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 only returns the number of mounted filesystems.
Normally flags should be 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 Thus, some of the information will be out of date, but getfsstat will not block waiting for information from a filesystem that is unable to respond.
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.
getfsstat fails if one or more of the following conditions are true:
Buf points to an invalid address.
An I/O error occurred while reading from or writing to the filesystem.
See attributes(5) for descriptions of the following attributes:
ATTRIBUTE TYPE | ATTRIBUTE VALUE |
---|---|
Interface Stability | Evolving |
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.
getfsstat fails if one or more of the following are true:
In user mode, the pointer indicates an invalid address. In supervisor mode, this is not detected, and the state of the target is unknown.
An I/O error occurred while reading from or writing to the filesystem.
NAME | SYNOPSIS | API RESTRICTIONS | FEATURES | DESCRIPTION | RETURN VALUES | ERRORS | ATTRIBUTES | SEE ALSO | RETURN VALUES | ERRORS | SEE ALSO