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RedHat 9 (Linux i386) - man page for ustat (redhat section 2)

USTAT(2)				      Linux Programmer's Manual 				     USTAT(2)

NAME
ustat - get file system statistics
SYNOPSIS
#include <sys/types.h> #include <unistd.h> /* libc[45] */ #include <ustat.h> /* glibc2 */ int ustat(dev_t dev, struct ustat *ubuf);
DESCRIPTION
ustat returns information about a mounted file system. dev is a device number identifying a device containing a mounted file system. ubuf is a pointer to a ustat structure that contains the following members: 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 */ The last two fields, f_fname and f_fpack, are not implemented and will always be filled with null characters.
RETURN VALUE
On success, zero is returned and the ustat structure pointed to by ubuf will be filled in. On error, -1 is returned, and errno is set appropriately.
ERRORS
EINVAL dev does not refer to a device containing a mounted file system. EFAULT ubuf points outside of your accessible address space. ENOSYS The mounted file system referenced by dev does not support this operation, or any version of Linux before 1.3.16.
NOTES
ustat has only been provided for compatibility. All new programs should use statfs(2) instead.
CONFORMING TO
SVr4. SVr4 documents additional error conditions ENOLINK, ECOMM, and EINTR but has no ENOSYS condition.
SEE ALSO
statfs(2), stat(2) Linux 1.3.16 1995-08-09 USTAT(2)


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