1explain_ustat_or_die(3)    Library Functions Manual    explain_ustat_or_die(3)
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NAME

6       explain_ustat_or_die - get file system statistics and report errors
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SYNOPSIS

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

14       The  explain_ustat_or_die  function is used to call the ustat(2) system
15       call. On failure an explanation will be  printed  to  stderr,  obtained
16       from  the explain_ustat(3) function, and then the process terminates by
17       calling exit(EXIT_FAILURE).
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19       The explain_ustat_on_error function is used to call the ustat(2) system
20       call.  On  failure  an  explanation will be printed to stderr, obtained
21       from the explain_ustat(3) function, but still returns to the caller.
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23       dev     The dev, exactly as to be passed to the ustat(2) system call.
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25       ubuf    The ubuf, exactly as to be passed to the ustat(2) system call.
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RETURN VALUE

28       The explain_ustat_or_die function only returns on success, see ustat(2)
29       for  more  information. On failure, prints an explanation and exits, it
30       does not return.
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32       The explain_ustat_on_error function always returns the value return  by
33       the wrapped ustat(2) system call.
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EXAMPLE

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

41       ustat(2)
42               get file system statistics
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44       explain_ustat(3)
45               explain ustat(2) errors
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47       exit(2) terminate the calling process
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50       libexplain version 1.4
51       Copyright (C) 2009 Peter Miller
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55                                                       explain_ustat_or_die(3)
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