ustat(2) - osol9

1ustat(2)                         System Calls                         ustat(2)
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NAME

6       ustat - get file system statistics
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SYNOPSIS

9       #include <sys/types.h>
10       #include <ustat.h>
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12       int ustat(dev_t dev, struct ustat *buf);
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DESCRIPTION

16       The  ustat()  function returns information about a mounted file system.
17       The dev argument is a device number identifying a device  containing  a
18       mounted file system (see makedev(3C)). The buf argument is a pointer to
19       a ustat structure that includes the following members:
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21         daddr_t  f_tfree;      /* Total free blocks */
22         ino_t    f_tinode;     /* Number of free inodes */
23         char     f_fname[6];   /* Filsys name */
24         char     f_fpack[6];   /* Filsys pack name */
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28       The f_fname and f_fpack members may not contain significant information
29       on all systems; in this case, these members will contain the null char‐
30       acter as the first character.
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RETURN VALUES

33       Upon successful completion, 0 is returned. Otherwise,  −1  is  returned
34       and errno is set to indicate the error.
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ERRORS

37       The ustat() function will fail if:
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39       ECOMM        The  dev  argument  is on a remote machine and the link to
40                    that machine is no longer active.
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43       EFAULT       The buf argument points to an illegal address.
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46       EINTR        A signal was caught during the execution  of  the  ustat()
47                    function.
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50       EINVAL       The dev argument is not the device number of a device con‐
51                    taining a mounted file system.
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54       ENOLINK      The dev argument refers to a device on  a  remote  machine
55                    and the link  to that machine is no longer active.
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58       EOVERFLOW    One  of  the  values returned cannot be represented in the
59                    structure pointed to by buf.
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USAGE

63       The statvfs(2) function should be used in favor of ustat().
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BUGS

69       The NFS revision 2 protocol does not permit the number of free files to
70       be  provided to the client; therefore, when ustat() has completed on an
71       NFS file system, f_tinode is always −1.
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75SunOS 5.11                        23 Jul 2001                         ustat(2)