header file mismatch for struct statfs and linux

[Chris Friesen]

The glibc header file for struct statfs defines the following fields:

    __fsblkcnt_t f_blocks;
    __fsblkcnt_t f_bfree;
    __fsblkcnt_t f_bavail;

where __fsblkcnt_t is defined as:

typedef unsigned int __fsblkcnt_t;

This causes problems since the linux kernel (and "man statfs") defines 
these entries as type long.  As well, I believe POSIX says that they are 
supposed to be longs.

When a statfs() call is made on an nfs-mounted filesystem that is not 
currently accessable, linux returns -1 in these three fields.  Since 
userspace is linked against the glibc headers, this causes the obvious 
problem if you check that the result is greater than zero.

Chris





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Chris Friesen                    | MailStop: 043/33/F10
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