Reduce system inode count Post: 302793453

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LEARN ABOUT MOJAVE

ustat

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

NAME

       ustat - get filesystem 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 filesystem.	dev is a device number identifying a device containing a mounted filesystem.  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 bytes ('').

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

       EFAULT ubuf points outside of your accessible address space.

       EINVAL dev does not refer to a device containing a mounted filesystem.

       ENOSYS The mounted filesystem referenced by dev does not support this operation, or any version of Linux before 1.3.16.

CONFORMING TO

       SVr4.

NOTES

       ustat() is deprecated and has been provided only for compatibility.  All new programs should use statfs(2) instead.

   HP-UX notes
       The HP-UX version of the ustat structure has an additional field, f_blksize, that is unknown elsewhere.	HP-UX warns: For some filesystems,
       the number of free inodes does not change.  Such filesystems will return -1 in the field f_tinode.  For some filesystems, inodes are dynam-
       ically allocated.  Such filesystems will return the current number of free inodes.

SEE ALSO

       stat(2), statfs(2)

COLOPHON

       This  page is part of release 4.15 of the Linux man-pages project.  A description of the project, information about reporting bugs, and the
       latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.

Linux								    2017-09-15								  USTAT(2)