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NAME

       explain_ustat_or_die - get file system statistics and report errors

SYNOPSIS

       #include <libexplain/ustat.h>
       void explain_ustat_or_die(dev_t dev, struct ustat *ubuf);
       int explain_ustat_on_error(dev_t dev, struct ustat *ubuf);

DESCRIPTION

       The  explain_ustat_or_die  function is used to call the ustat(2) system
       call. On failure an explanation will be  printed  to  stderr,  obtained
       from  the explain_ustat(3) function, and then the process terminates by
       calling exit(EXIT_FAILURE).

       The explain_ustat_on_error function is used to call the ustat(2) system
       call.  On  failure  an  explanation will be printed to stderr, obtained
       from the explain_ustat(3) function, but still returns to the caller.

       dev     The dev, exactly as to be passed to the ustat(2) system call.

       ubuf    The ubuf, exactly as to be passed to the ustat(2) system  call.

RETURN VALUE

       The explain_ustat_or_die function only returns on success, see ustat(2)
       for more information. On failure, prints an explanation and  exits,  it
       does not return.

       The  explain_ustat_on_error function always returns the value return by
       the wrapped ustat(2) system call.

EXAMPLE

       The explain_ustat_or_die function is intended to be used in  a  fashion
       similar to the following example:
              explain_ustat_or_die(dev, ubuf);

SEE ALSO

       ustat(2)
               get file system statistics

       explain_ustat(3)
               explain ustat(2) errors

       exit(2) terminate the calling process

COPYRIGHT

       libexplain version 0.19
       Copyright (C) 2009 Peter Miller

                                                       explain_ustat_or_die(3)