SysIII/usr/src/man/man2/ustat.2

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.TH USTAT 2
.SH NAME
ustat \- get file system statistics
.SH SYNOPSIS
.B #include <sys/types.h>
.br
.B #include <ustat.h>
.sp
.B int ustat (dev, buf)
.br
.B int dev;
.br
.B struct ustat \(**buf;
.SH DESCRIPTION
.I Ustat\^
returns information about a mounted file system.
.I Dev\^
is a device number identifying a device containing
a mounted file system.
.I Buf\^
is a pointer to a
.I ustat\^
structure that includes to following elements:
.PP
.RS
.nf
.ta 8n 25n 30n
daddr_t	f_tfree;	/\(** Total free blocks \(**/
ino_t	f_tinode;	/\(** Number of free inodes \(**/
char	f_fname[6];	/\(** Filsys name \(**/
char	f_fpack[6];	/\(** Filsys pack name \(**/
.fi
.RE
.PP
.I Ustat\^
will fail if one or more of the following are true:
.IP
.I Dev\^
is not the device number of a device containing a mounted file system.
.SM
\%[EINVAL]
.IP
.I Buf\^
points outside the process's allocated address space.
.SM
\%[EFAULT]
.SH "RETURN VALUE"
Upon successful completion, a value of 0 is returned.
Otherwise, a value of \-1 is returned and
.I errno\^
is set to indicate the error.
.SH "SEE ALSO"
stat(2), fs(5).